CN101852723A - Sea-air carbon dioxide flux measuring device and measuring method thereof - Google Patents
Sea-air carbon dioxide flux measuring device and measuring method thereof Download PDFInfo
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- CN101852723A CN101852723A CN 201010196352 CN201010196352A CN101852723A CN 101852723 A CN101852723 A CN 101852723A CN 201010196352 CN201010196352 CN 201010196352 CN 201010196352 A CN201010196352 A CN 201010196352A CN 101852723 A CN101852723 A CN 101852723A
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Abstract
The invention relates to a sea-air carbon dioxide flux measuring device and a measuring method thereof, belonging to the field of sea-air measurement. The sea-air carbon dioxide flux measuring device comprises a control and data acquisition module, a carbon dioxide partial pressure measuring sensor and a sampling module. Under the control of the control and data acquisition module, the sampling module respectively extracts a water sample and an air sample to the carbon dioxide partial pressure measuring sensor for measurement to obtain sea-air carbon dioxide flux. The invention realizes the device which is provided with the CO2 partial pressure measuring sensor based on acid-base indicators and an optical fiber technology and can synchronously measure the CO2 partial pressure in surface seawater and sea surface atmosphere to further estimate the sea-air CO2 flux. Compared with the prior art, the invention has the advantages that the structure is simple, the stability is high, the power consumption is low and the device is suitable for long-time serial automatic observation on anchored platforms.
Description
Technical field
The present invention relates to extra large gas fields of measurement, particularly a kind of sea-air carbon dioxide flux measuring device and measuring method thereof.
Background technology
The energy between land or ocean and the atmosphere and the quantitative examination of mass exchange are biomass geochemistry round-robin important contents, and the gas exchange flux between extra large gas is CO particularly
2The monitoring of exchange flux, estimation are of great importance to the biomass geochemistry circulation and the global climate transition of our profound understanding carbon.
Under the prior art condition, extra large gas CO
2Flux is difficult to directly use Instrument measuring.At present, the calculating sea gas CO that is approved in the world, extensively adopt
2The flux method is ocean-atmosphere interface CO
2The partial pressure difference method.This method adopts the CO in surface seawater and the sea table atmosphere
2Partial pressure value poor, in conjunction with the ocean-atmosphere interface gas exchange rate to CO
2The exchange flux is estimated.Concrete available formula 1 expression.
F is CO in the formula 1
2At the net flux of air-sea interface,
Be CO
2Solubleness in seawater is the function of temperature and salinity; K is the interfacial gases transfer rate, is wind speed (u) and Si Mite number (S
c) function.
Present CO
2Dividing potential drop is measured the general aqueous vapor balance-NDIR (Non-Dispersive Infrared) mensuration that adopts, this method since defective such as instrument costliness, complicated operation, the power consumption that adopts be huge be mainly used in boat-carrying at present and walk in the aerial survey amount.
In recent years, the CO2 dividing potential drop survey sensor based on acid base indicator and optical fiber technology makes considerable progress.This technology high precision, fast-response, low-power consumption, high letter price ratio both be suitable for boat-carrying and had walked the aerial survey amount, were suitable for long-term in site measurement again, will be CO
2The developing direction of dividing potential drop measuring technique.
CO based on acid base indicator and optical fiber technology
2The ultimate principle of dividing potential drop survey sensor is to utilize to select the permeability film that testing sample and indicator buffer solution are separated the CO in the testing sample
2Infiltration is by this film, reach new balance with the indicator buffer solution of film opposite side, by measuring the absorbance of indicator acid attitude and alkali attitude, and calculate the pH value of indicator solution thus, concern according to ionization, the hydrolysising balance of indicator solution and carbonate system then to obtain pH and CO
2The relation of dividing potential drop finally calculates the CO of sample
2Dividing potential drop.Concrete available formula 2, formula 3, formula 4 and formula 5 expressions.
[H
+]
3+ ([Na
+]-K
aC
HIn/ (K
a+ [H
+])) [H
+]
2-(K
1K
hPCO
2+ K
w) [H
+]-2K
1K
2K
hPCO
2=0 (formula 5)
A in the formula 2 (λ) is that sample is the absorbance at λ place at wavelength, S
wBe that sample is the spectrum at λ place at wavelength (λ), D
w(λ) be the dark current of sample, S
RBe that pure water is the spectrum at λ place at wavelength (λ), D
R(λ) be the dark current of pure water, L is an optical path length.
A in the formula 4
RBe that instrument is the ratio (the sour attitude of indicator and the absorption peak of alkali attitude are respectively at 434nm and 620nm) of 434nm and 620nm place absorbance at wavelength, ε
434 (HIn)And ε
434 (HIn)The sour attitude that is indicator is respectively molar absorptivity under 434nm and the 620nm at wavelength.
K in the formula 5
1, K
2Be respectively the firsts and seconds ionic dissociation equilibrium constant of carbonic acid, K
hBe Henry's constant, K
aBe indicator ionic dissociation equilibrium constant, C
HInBe the total concentration of indicator, [Na
+] be the concentration of Na ion in the indication agent solution, K
wIt is the ionic dissociation equilibrium constant of water.
At present, based on the CO of acid base indicator and optical fiber technology
2Dividing potential drop survey sensor technology also is in conceptual phase, does not have business-like instrument to buy, and the research of forefront only limits to utilize the surface seawater CO of the on-the-spot original position of this technical design
2The dividing potential drop measuring instrument yet there are no the CO that directly utilizes in this technology synchro measure surface seawater and the sea table atmosphere
2Dividing potential drop, and then estimate extra large gas CO
2The research report of flux.
Summary of the invention
The invention provides a kind of sea-air carbon dioxide flux measuring device, to solve the CO2 dividing potential drop survey sensor that does not have in the prior art to adopt based on acid base indicator and optical fiber technology, synchro measure atmosphere, seawater CO2 dividing potential drop, and then estimate the technical matters of extra large gas CO2 flux.
Another one goal of the invention of the present invention is to provide a kind of measuring method based on this measurement mechanism.
Realize first goal of the invention of the present invention, the technical scheme of employing is as follows:
A kind of sea-air carbon dioxide flux measuring device, described measurement mechanism comprises control and data acquisition module, the partial pressure of carbon dioxide survey sensor, the sample introduction module, the sample introduction module is under the control of control and data acquisition module, extract the gentle sample of water sample respectively and measure, obtain the sea-air carbon dioxide flux to the partial pressure of carbon dioxide survey sensor.
Control and data acquisition module are mainly used in the communication between spectrometer data acquisition, auxiliary parameter collection, the measuring instrument-host computer, and system's power supply control.
As further preferred version:
Described partial pressure of carbon dioxide survey sensor comprises that the surface seawater partial pressure of carbon dioxide is measured passage and Hai Biao atmospheric carbon dioxide dividing potential drop is measured passage;
Described sample introduction module comprises two submodules of the gentle sample sample introduction of water sample sample introduction submodule submodule, and water sample sample introduction submodule is arranged at the surface seawater partial pressure of carbon dioxide and measures passage, and gas sample sample introduction submodule is arranged at sea table atmospheric carbon dioxide dividing potential drop and measures passage.
As further preferred version again, described partial pressure of carbon dioxide survey sensor also comprises light source and two spectrometers, the seawater partial pressure of carbon dioxide measures passage and Hai Biao atmospheric carbon dioxide dividing potential drop measurement passage is respectively equipped with light source interface and spectrometer interface, light source is measured passage by " Y " type optical fiber and surface seawater partial pressure of carbon dioxide and is linked to each other with the respective sources interface that Hai Biao atmospheric carbon dioxide dividing potential drop is measured passage, the spectrometer interface that spectrometer is measured passage by an ordinary optic fibre and surface seawater partial pressure of carbon dioxide links to each other, and another spectrometer links to each other by the spectrometer interface of another ordinary optic fibre and sea table atmospheric carbon dioxide dividing potential drop measurement passage.
As preferred version further, described " Y " type optical fiber and ordinary optic fibre all are silica fibre.
As a kind of preferred version, ceramic contact pin is used in the core diameter of described silica fibre 〉=400 micron, and joint adopts SMA905.
Described light source adopts bromine tungsten filament lamp, and spectral range covers 300-1050nm;
The wavelength coverage of micro spectrometer covers 300nm～1100nm, and spectral wavelength resolution is smaller or equal to 1nm.
As further preferred version:
Described water sample sample introduction submodule comprises the diving water pump, the sea water filter device, and the seawater self-priming pump, seawater cleaning module and seawater waste liquid module:
The surface seawater partial pressure of carbon dioxide is measured passage and is provided with seawater injection port and seawater escape hole, the sea water filter device is arranged at the seawater injection port that the surface seawater partial pressure of carbon dioxide is measured passage, the diving water pump is arranged at the seawater escape hole that the surface seawater partial pressure of carbon dioxide is measured passage, during the diving pump working, enter the surface seawater partial pressure of carbon dioxide after seawater will filter by the sea water filter device and measure passage, measure the seawater escape hole discharge of passage then through the surface seawater partial pressure of carbon dioxide;
The surface seawater partial pressure of carbon dioxide is measured passage and is provided with reagent injection port and reagent outlet, seawater self-priming delivery side of pump is connected to the reagent injection port that the surface seawater partial pressure of carbon dioxide is measured passage, the inlet of seawater self-priming pump connects the seawater cleaning module, enters seawater waste liquid module after the reagent that the seawater self-priming pump pumps into from the seawater cleaning module is measured passage through the surface seawater partial pressure of carbon dioxide;
Described gas sample sample introduction submodule comprises the gas sampling water pump, gas filter, and the gas self-priming pump, purge of gas module and gas waste liquid module:
Sea table atmospheric carbon dioxide dividing potential drop is measured passage and is provided with gas sampling mouth and gas discharge outlet, gas filter is arranged at the gas sampling mouth that sea table atmospheric carbon dioxide dividing potential drop is measured passage, the gas sampling air pump is arranged at the gas discharge outlet that sea table atmospheric carbon dioxide dividing potential drop is measured passage, during the work of gas sampling air pump, enter sea table atmospheric carbon dioxide dividing potential drop after gas will filter by gas filter and measure passage, discharge through the gas discharge outlet of sea table atmospheric carbon dioxide dividing potential drop measurement passage then;
Sea table atmospheric carbon dioxide dividing potential drop is measured passage and is provided with reagent injection port and reagent outlet, gas self-priming delivery side of pump is connected to the reagent injection port that sea table atmospheric carbon dioxide dividing potential drop is measured passage, the inlet of gas self-priming pump connects the purge of gas module, enters gas waste liquid module after the reagent that the gas self-priming pump pumps into from the purge of gas module is measured passage through sea table atmospheric carbon dioxide dividing potential drop.
As further preferred version:
Described seawater cleaning module and purge of gas module comprise respectively: the pure water bag, and indicator bag and more than one cleaning fluid bag is installed on high-purity water bag respectively more than one two three-way electromagnetic valves, indicator bag and more than the exit of one cleaning fluid bag;
The cleaning fluid bag of seawater cleaning module is preferably 3, and two three-way electromagnetic valves are preferably 5;
The cleaning fluid bag of purge of gas module is preferably 3, and two three-way electromagnetic valves are preferably 5;
Described seawater waste liquid module and gas waste liquid module are waste fluid bag;
Seawater self-priming pump and a plurality of two three-way electromagnetic valves are used, reagent injection port from passage to the surface seawater partial pressure of carbon dioxide that can select to measure pumps into high purity water or indicator or any one cleaning fluid, and the reagent that pumps into is discharged to waste fluid bag after measuring passage through the surface seawater partial pressure of carbon dioxide;
Gas self-priming pump and a plurality of two three-way electromagnetic valves are used, reagent injection port from passage to sea table atmospheric carbon dioxide dividing potential drop that can select to measure pumps into high purity water or indicator or any one cleaning fluid, and the reagent that pumps into is discharged to waste fluid bag after measuring passage through sea table atmospheric carbon dioxide dividing potential drop.
Described diving water pump, the sea water filter device, the seawater self-priming pump, the seawater cleaning module is connected by silica gel hose with seawater waste liquid module;
Described gas sampling water pump, gas filter, gas self-priming pump, purge of gas module and gas waste liquid module;
The internal diameter of described silica gel hose satisfies with lower inequality: 1.6 millimeters≤internal diameter≤5 millimeters, and adopt the PTFE material;
Described diving water pump is a minisize dc diving water pump, lift 〉=0.6 meter;
Described gas self-priming pump is the minisize dc gas samping pump, the speed of evacuation 〉=3L/min, and this sampling pump can extract the gas that is rich in steam;
The valve body material of described two three-way electromagnetic valves is PTFE;
Described seawater self-priming pump and gas self-priming pump are miniature self-priming pump, and pump housing material is PTFE;
Described sea water filter device and gas filter are ball-type red copper filtrator, and by red copper materials processing, its pore size filter satisfies with lower inequality: 20 microns≤pore size filter≤3000 microns.
Realize second purpose of the present invention, the technical scheme of employing is as follows:
A kind of sea-air carbon dioxide metering system, described metering system comprises:
(701) under the control of control and data acquisition module, the sample introduction module pumps into cleaning fluid 1 to the reagent injection port of surface seawater partial pressure of carbon dioxide measurement passage and Hai Biao atmospheric carbon dioxide dividing potential drop measurement passage respectively synchronously, when the candidate agent escape hole has solution to discharge, stop to pump into;
(702) wait for the cleaning fluid stand-by period, pump into cleaning fluid 2 once more synchronously respectively, when the candidate agent escape hole has solution to discharge, stop to pump into;
(703) wait for the cleaning fluid stand-by period, pump into cleaning fluid 3 once more synchronously respectively, when the candidate agent escape hole has solution to discharge, stop to pump into;
(704) wait for the cleaning fluid stand-by period, pump into high purity water once more synchronously respectively;
(705) wait for the high purity water stand-by period, pump into indicator once more synchronously respectively, when the candidate agent escape hole has solution to discharge, stop to pump into;
(706) partial pressure of carbon dioxide of synchro measure sea table atmosphere and surface seawater;
(707) calculate the sea-air carbon dioxide flux.
As further preferred version, the described cleaning fluid stand-by period satisfies with lower inequality: 30 seconds≤cleaning fluid stand-by period≤1 minute, the high purity water stand-by period satisfies with lower inequality: 3 minutes≤high purity water stand-by period≤5 minute.。
As preferred version further, the concrete steps of described step (1002) are:
(901) under the control of control and data acquisition module, minisize dc diving water pump and minisize dc gas samping pump start simultaneously, and surface seawater and Hai Biao atmosphere are distinguished suction surface seawater partial pressure of carbon dioxide measurement passage and Hai Biao atmospheric carbon dioxide dividing potential drop measurement passage synchronously;
(902) the wait light source is opened light source after the stand-by period;
(903) wait for spectrometer after the stand-by period, the spectral value of two spectrometers of record utilizes the computing method that draw in advance, calculates the partial pressure of carbon dioxide value of sea table atmosphere and surface seawater.
As further preferred version again, 3 minutes≤light source stand-by period≤5 minute, the spectrometer stand-by period satisfies with lower inequality: 30 seconds≤spectrometer stand-by period≤1 minute.
The present invention has realized the CO2 dividing potential drop survey sensor technology based on acid base indicator and optical fiber technology, the CO in synchro measure surface seawater and the sea table atmosphere
2Dividing potential drop, and then estimate extra large gas CO
2The device of flux.Compared with prior art, simple in structure, good stability, low in energy consumption, be suitable for the grappling platform, long-time sequence observes automatically.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is described in detail.
As shown in the figure, a kind of extra large gas CO2 flux measuring device, it comprises control and data acquisition module, shown in accompanying drawing mediumpurple frame of broken lines is interior; CO2 dividing potential drop survey sensor, in the accompanying drawing in the red ring-type frame of broken lines shown in; Shown in the sample introduction module, accompanying drawing Smalt frame of broken lines.
Control and data acquisition module are mainly used in the communication between spectrometer data acquisition, auxiliary parameter collection, the measuring instrument-host computer, and system's power supply control.
CO2 dividing potential drop survey sensor comprises surface seawater CO2 dividing potential drop measurement passage (1), and sea table atmosphere CO 2 dividing potential drop is measured passage (2), light source (3), spectrometer 1 (4), spectrometer 2 (5), " Y " silica fibre (6), common silica fibre 1 (7) and common silica fibre 2 (8).Light source (3) is measured passage (1) by " Y " silica fibre (6) and surface seawater CO2 dividing potential drop and is linked to each other with the respective sources interface that sea table atmosphere CO 2 dividing potential drop is measured passage (2), the spectrometer interface that spectrometer 1 (4) is measured passage (1) by common silica fibre 1 (7) and surface seawater CO2 dividing potential drop links to each other, and the spectrometer interface that spectrometer 2 (5) is measured passage (2) by common silica fibre 2 (8) and sea table atmosphere CO 2 dividing potential drop links to each other.
The sample introduction module comprises two submodules of the gentle sample sample introduction of water sample sample introduction submodule submodule.
Water sample sample introduction submodule comprises minisize dc diving water pump (9), ball-type red copper filtrator 1 (10), miniature self-priming pump 1 (11), miniature two three-way electromagnetic valves 1 (12), miniature two three-way electromagnetic valves 2 (13), miniature two three-way electromagnetic valves 3 (14), miniature two three-way electromagnetic valves 4 (15), miniature two three-way electromagnetic valves 5 (16), high-purity water bag 1 (17), indicator bag 1 (18), cleaning fluid bag 1 (19), cleaning fluid bag 2 (20), cleaning fluid bag 3 (21), waste fluid bag 1 (22), and some silica gel hoses that are used to connect.
Ball-type red copper filtrator 1 (10) is installed on the seawater injection port that surface seawater CO2 dividing potential drop is measured passage (1), minisize dc diving water pump (9) is installed on the seawater escape hole that surface seawater CO2 dividing potential drop is measured passage (1), during minisize dc diving water pump (9) work, enter surface seawater CO2 dividing potential drop after seawater will filter by ball-type red copper filtrator 1 (10) and measure passage (1), measure the seawater escape hole discharge of passage (1) then through surface seawater CO2 dividing potential drop.
The outlet of miniature self-priming pump 1 (11) is connected to the reagent injection port that surface seawater CO2 dividing potential drop is measured passage (1), the inlet of miniature self-priming pump 1 (11) connects high-purity water bag 1 (17), indicator bag 1 (18), cleaning fluid bag 1 (19), cleaning fluid bag 2 (20) and cleaning fluid bag 3 (21).Miniature two three-way electromagnetic valves 1 (12), 2 (13), 3 (14), 4 (15) and 5 (16) are installed on high-purity water bag 1 (17), indicator bag 1 (18) respectively, cleaning fluid bag 1 (19), 2 (20) and 3 (21) exit, miniature self-priming pump 1 (11) and miniature two three-way electromagnetic valves 1 (12), 2 (13), 3 (14), 4 (15), 5 (16) are used, reagent injection port from passage (1) to surface seawater CO2 dividing potential drop that can select to measure pumps into high purity water, or indicator, or cleaning fluid 1, or cleaning fluid 2, or cleaning fluid 3, the reagent that pumps into enters waste fluid bag 1 (22) after measuring passage (1) through surface seawater CO2 dividing potential drop.
Gas sample sample introduction submodule comprises minisize dc gas samping pump (23), ball-type red copper filtrator 2 (24), miniature self-priming pump 2 (25), miniature two three-way electromagnetic valves 6 (26), miniature two three-way electromagnetic valves 7 (27), miniature two three-way electromagnetic valves 8 (28), miniature two three-way electromagnetic valves 9 (29), miniature two three-way electromagnetic valves 10 (30), high-purity water bag 2 (31), indicator bag 2 (32), cleaning fluid bag 4 (33), cleaning fluid bag 5 (34), cleaning fluid bag 6 (35), waste fluid bag 2 (36), and some silica gel hoses that are used to connect.
Ball-type red copper filtrator 2 (24) is installed on the atmosphere injection port that sea table atmosphere CO 2 dividing potential drop is measured passage (2), minisize dc gas samping pump (23) is installed on the atmosphere escape hole that sea table atmosphere CO 2 dividing potential drop is measured passage (2), during minisize dc gas samping pump (23) work, enter extra large table atmosphere CO 2 dividing potential drop after sea table atmosphere will filter by ball-type red copper filtrator 2 (24) and measure passage (2), then the atmosphere escape hole discharge of measuring passage (2) through sea table atmosphere CO 2 dividing potential drop.
The outlet of miniature self-priming pump 2 (25) is connected to the reagent injection port that sea table atmosphere CO 2 dividing potential drop is measured passage (2), the inlet of miniature self-priming pump 2 (25) connects high-purity water bag 2 (31), indicator bag 2 (32), cleaning fluid bag 4 (33), cleaning fluid bag 5 (34) and cleaning fluid bag 6 (35).Miniature two three-way electromagnetic valves 6 (26), 7 (27), 8 (28), 9 (29) and 10 (30) are installed on high-purity water bag 2 (31), indicator bag 2 (32) respectively, cleaning fluid bag 4 (33), 5 (34) and 6 (35) exit, miniature self-priming pump 2 (25) and miniature two three-way electromagnetic valves 6 (26), 7 (27), 8 (28), 9 (29), 10 (30) are used, reagent injection port from passage (2) to sea table atmosphere CO 2 dividing potential drop that can select to measure pumps into high purity water, or indicator, or cleaning fluid 1, or cleaning fluid 2, or cleaning fluid 3, the reagent that pumps into enters waste fluid bag 2 (36) after measuring passage (2) through sea table atmosphere CO 2 dividing potential drop.
With the one-shot measurement is example, shows working method of the present invention.
At first clean CO2 dividing potential drop survey sensor, pump into indicator.Process is as follows: under the control of control and data acquisition module, miniature self-priming pump 1 (11) and miniature self-priming pump 2 (25) pump into cleaning fluid 1 to the reagent injection port of surface seawater CO2 dividing potential drop measurement passage (1) and sea table atmosphere CO 2 dividing potential drop measurement passage (2) respectively synchronously, the candidate agent escape hole, when having solution to enter waste fluid bag 1 (22) and waste fluid bag 2 (36) respectively, stop miniature self-priming pump 1 (11) and miniature self-priming pump 2 (25); Wait for 30 seconds, start miniature self-priming pump 1 (11) and miniature self-priming pump 2 (25) once more, pump into cleaning fluid 2 synchronously respectively, the candidate agent escape hole when having solution to enter waste fluid bag 1 (22) and waste fluid bag 2 (36) respectively, stops; Wait for 30 seconds, start miniature self-priming pump 1 (11) and miniature self-priming pump 2 (25) once more, pump into cleaning fluid 3 synchronously respectively, the candidate agent escape hole when having solution to enter waste fluid bag 1 (22) and waste fluid bag 2 (36) respectively, stops; Wait for 30 seconds, start miniature self-priming pump 1 (11) and miniature self-priming pump 2 (25) once more, pump into high purity water synchronously respectively; Wait for 3 minutes, pump into indicator synchronously respectively, the candidate agent escape hole when having solution to enter waste fluid bag 1 (22) and waste fluid bag 2 (36) respectively, stops.
The CO2 dividing potential drop of atmosphere and surface seawater is shown in the synchro measure sea then.Process is as follows: under the control of control and data acquisition module, minisize dc diving water pump (9) and minisize dc gas samping pump (23) start simultaneously, surface seawater and Hai Biao atmosphere are distinguished suction surface seawater CO2 dividing potential drop measurement passage (1) and sea table atmosphere CO 2 dividing potential drop measurement passage (2) synchronously, wait for after 3 minutes, open light source (3), wait for after 30 seconds, recording light spectrometer 1 (4), the spectral value of spectrometer 2 (5), utilize the computing method that draw in advance, calculate the CO2 partial pressure value of sea table atmosphere and surface seawater, and then estimate extra large gas CO2 flux, close minisize dc diving water pump (9) and minisize dc gas samping pump (23).
In the present embodiment, all silica fibres are: core diameter: 600 microns, and ceramic contact pin, joint: SMA905; Light source is a bromine tungsten filament lamp, spectral range 300-1050nm, and colour temperature is 3100K; The wavelength coverage of micro spectrometer: 300nm～1100nm, spectral wavelength resolution 1nm; 1.6 millimeters of the internal diameters of all silica gel hoses, external diameter are 3.2 millimeters, the PTFE material; The valve body material of all two three-way electromagnetic valves is PTFE; All miniature self-priming pump pump housing materials are PTFE; Minisize dc diving water pump, 0.6 meter of lift; Minisize dc gas samping pump speed of evacuation 3L/min can extract the gas that is rich in steam; 200 microns of ball-type red copper filtrator 1 pore size filters; 1000 microns of ball-type red copper filtrator 2 pore size filters.
Claims (10)
1. sea-air carbon dioxide flux measuring device, it is characterized in that, described measurement mechanism comprises control and data acquisition module, the partial pressure of carbon dioxide survey sensor, the sample introduction module, the sample introduction module extracts the gentle sample of water sample respectively and measures to the partial pressure of carbon dioxide survey sensor under the control of control and data acquisition module, obtains the sea-air carbon dioxide flux.
2. measurement mechanism according to claim 1 is characterized in that:
Described partial pressure of carbon dioxide survey sensor comprises that the surface seawater partial pressure of carbon dioxide is measured passage and Hai Biao atmospheric carbon dioxide dividing potential drop is measured passage;
Described sample introduction module comprises two submodules of the gentle sample sample introduction of water sample sample introduction submodule submodule, and water sample sample introduction submodule is arranged at the surface seawater partial pressure of carbon dioxide and measures passage, and gas sample sample introduction submodule is arranged at sea table atmospheric carbon dioxide dividing potential drop and measures passage.
3. measurement mechanism according to claim 2, it is characterized in that, described partial pressure of carbon dioxide survey sensor also comprises light source and two spectrometers, the seawater partial pressure of carbon dioxide measures passage and Hai Biao atmospheric carbon dioxide dividing potential drop measurement passage is respectively equipped with light source interface and spectrometer interface, light source is measured passage by " Y " type optical fiber and surface seawater partial pressure of carbon dioxide and is linked to each other with the respective sources interface that Hai Biao atmospheric carbon dioxide dividing potential drop is measured passage, the spectrometer interface that spectrometer is measured passage by an ordinary optic fibre and surface seawater partial pressure of carbon dioxide links to each other, and another spectrometer links to each other by the spectrometer interface of another ordinary optic fibre and sea table atmospheric carbon dioxide dividing potential drop measurement passage.
4. measurement mechanism according to claim 3 is characterized in that, described " Y " type optical fiber and ordinary optic fibre all are silica fibre.
5. according to claim 2 or 3 or 4 described measurement mechanisms, it is characterized in that:
Described water sample sample introduction submodule comprises the diving water pump, the sea water filter device, and the seawater self-priming pump, seawater cleaning module and seawater waste liquid module:
The surface seawater partial pressure of carbon dioxide is measured passage and is provided with seawater injection port and seawater escape hole, the sea water filter device is arranged at the seawater injection port that the surface seawater partial pressure of carbon dioxide is measured passage, the diving water pump is arranged at the seawater escape hole that the surface seawater partial pressure of carbon dioxide is measured passage, during the diving pump working, enter the surface seawater partial pressure of carbon dioxide after seawater will filter by the sea water filter device and measure passage, measure the seawater escape hole discharge of passage then through the surface seawater partial pressure of carbon dioxide;
The surface seawater partial pressure of carbon dioxide is measured passage and is provided with reagent injection port and reagent outlet, seawater self-priming delivery side of pump is connected to the reagent injection port that the surface seawater partial pressure of carbon dioxide is measured passage, the inlet of seawater self-priming pump connects the seawater cleaning module, enters seawater waste liquid module after the reagent that the seawater self-priming pump pumps into from the seawater cleaning module is measured passage through the surface seawater partial pressure of carbon dioxide;
Described gas sample sample introduction submodule comprises the gas sampling water pump, gas filter, and the gas self-priming pump, purge of gas module and gas waste liquid module:
Sea table atmospheric carbon dioxide dividing potential drop is measured passage and is provided with gas sampling mouth and gas discharge outlet, gas filter is arranged at the gas sampling mouth that sea table atmospheric carbon dioxide dividing potential drop is measured passage, the gas sampling air pump is arranged at the gas discharge outlet that sea table atmospheric carbon dioxide dividing potential drop is measured passage, during the work of gas sampling air pump, enter sea table atmospheric carbon dioxide dividing potential drop after gas will filter by gas filter and measure passage, discharge through the gas discharge outlet of sea table atmospheric carbon dioxide dividing potential drop measurement passage then;
Sea table atmospheric carbon dioxide dividing potential drop is measured passage and is provided with reagent injection port and reagent outlet, gas self-priming delivery side of pump is connected to the reagent injection port that sea table atmospheric carbon dioxide dividing potential drop is measured passage, the inlet of gas self-priming pump connects the purge of gas module, enters gas waste liquid module after the reagent that the gas self-priming pump pumps into from the purge of gas module is measured passage through sea table atmospheric carbon dioxide dividing potential drop.
6. measurement mechanism according to claim 5 is characterized in that:
Described seawater cleaning module and purge of gas module comprise respectively: the pure water bag, and indicator bag and more than one cleaning fluid bag is installed on high-purity water bag respectively more than one two three-way electromagnetic valves, indicator bag and more than the exit of one cleaning fluid bag;
Described seawater waste liquid module and gas waste liquid module are waste fluid bag;
Seawater self-priming pump and a plurality of two three-way electromagnetic valves are used, reagent injection port from passage to the surface seawater partial pressure of carbon dioxide that can select to measure pumps into high purity water or indicator or any one cleaning fluid, and the reagent that pumps into is discharged to waste fluid bag after measuring passage through the surface seawater partial pressure of carbon dioxide;
Gas self-priming pump and a plurality of two three-way electromagnetic valves are used, reagent injection port from passage to sea table atmospheric carbon dioxide dividing potential drop that can select to measure pumps into high purity water or indicator or any one cleaning fluid, and the reagent that pumps into is discharged to waste fluid bag after measuring passage through sea table atmospheric carbon dioxide dividing potential drop.
7. a sea-air carbon dioxide metering system adopts each described measurement mechanism of claim 1～6, it is characterized in that described metering system comprises:
(701) under the control of control and data acquisition module, the sample introduction module pumps into cleaning fluid 1 to the reagent injection port of surface seawater partial pressure of carbon dioxide measurement passage and Hai Biao atmospheric carbon dioxide dividing potential drop measurement passage respectively synchronously, when the candidate agent escape hole has solution to discharge, stop to pump into;
(702) wait for the cleaning fluid stand-by period, pump into cleaning fluid 2 once more synchronously respectively, when the candidate agent escape hole has solution to discharge, stop to pump into;
(703) wait for the cleaning fluid stand-by period, pump into cleaning fluid 3 once more synchronously respectively, when the candidate agent escape hole has solution to discharge, stop to pump into;
(704) wait for the cleaning fluid stand-by period, pump into high purity water once more synchronously respectively;
(705) wait for the high purity water stand-by period, pump into indicator once more synchronously respectively, when the candidate agent escape hole has solution to discharge, stop to pump into;
(706) partial pressure of carbon dioxide of synchro measure sea table atmosphere and surface seawater;
(707) calculate the sea-air carbon dioxide flux.
8. metering system according to claim 7, it is characterized in that, the described cleaning fluid stand-by period satisfies with lower inequality: 30 seconds≤cleaning fluid stand-by period≤1 minute, the high purity water stand-by period satisfies with lower inequality: 3 minutes≤high purity water stand-by period≤5 minute.
9. metering system according to claim 8 is characterized in that, the concrete steps of described step (706) are:
(901) under the control of control and data acquisition module, minisize dc diving water pump and minisize dc gas samping pump start simultaneously, and surface seawater and Hai Biao atmosphere are distinguished suction surface seawater partial pressure of carbon dioxide measurement passage and Hai Biao atmospheric carbon dioxide dividing potential drop measurement passage synchronously;
(902) the wait light source is opened light source after the stand-by period;
(903) wait for spectrometer after the stand-by period, the spectral value of two spectrometers of record calculates the partial pressure of carbon dioxide value that atmosphere and surface seawater are shown in the sea.
10. metering system according to claim 9, it is characterized in that, the described light source stand-by period satisfies with lower inequality: 3 minutes≤light source stand-by period≤5 minute, the spectrometer stand-by period satisfies with lower inequality: 30 seconds≤spectrometer stand-by period≤1 minute.
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| CN103616496A (en) * | 2013-12-19 | 2014-03-05 | 江苏大学 | Method for measuring soil CO2 flux tidal flat wetland during early and later intertidal periods |
| CN112842403A (en) * | 2020-12-24 | 2021-05-28 | 中国水产科学研究院南海水产研究所 | Collection of aquatic animal breath release14CO2And method of use thereof |
| CN113525614A (en) * | 2021-08-13 | 2021-10-22 | 山东大学 | Ocean profile carbon dioxide concentration observation device and working method thereof |
| CN114254526A (en) * | 2022-03-01 | 2022-03-29 | 中国长江三峡集团有限公司 | Method and system for evaluating carbon dioxide exchange capacity of lake water-gas interface |
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| CN103616496A (en) * | 2013-12-19 | 2014-03-05 | 江苏大学 | Method for measuring soil CO2 flux tidal flat wetland during early and later intertidal periods |
| CN103616496B (en) * | 2013-12-19 | 2015-04-22 | 江苏大学 | Method for measuring soil CO2 flux tidal flat wetland during early and later intertidal periods |
| CN112842403A (en) * | 2020-12-24 | 2021-05-28 | 中国水产科学研究院南海水产研究所 | Collection of aquatic animal breath release14CO2And method of use thereof |
| CN113525614A (en) * | 2021-08-13 | 2021-10-22 | 山东大学 | Ocean profile carbon dioxide concentration observation device and working method thereof |
| CN114254526A (en) * | 2022-03-01 | 2022-03-29 | 中国长江三峡集团有限公司 | Method and system for evaluating carbon dioxide exchange capacity of lake water-gas interface |
| CN115791711A (en) * | 2022-11-11 | 2023-03-14 | 中国海洋大学 | Underwater dissolved CO based on liquid phase response speed enhancement strategy 2 In-situ sensor |
| CN116724946A (en) * | 2023-05-12 | 2023-09-12 | 中国水产科学研究院南海水产研究所 | Zooplankton culture device and method for radiolabeling experiment |
| CN116724946B (en) * | 2023-05-12 | 2024-03-12 | 中国水产科学研究院南海水产研究所 | Zooplankton culture device and method for radiolabeling experiment |
| CN117871793A (en) * | 2024-03-13 | 2024-04-12 | 自然资源部第二海洋研究所 | Sea-gas carbon dioxide flux estimation method considering precipitation influence |
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