CN111984912A - Method for calculating oxygen release amount and carbon sink amount of green plants - Google Patents
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 78
- 239000001301 oxygen Substances 0.000 title claims abstract description 78
- 241001464837 Viridiplantae Species 0.000 title claims abstract description 77
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 36
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- 238000004364 calculation method Methods 0.000 claims abstract description 26
- 229910001882 dioxygen Inorganic materials 0.000 claims abstract description 15
- 230000001174 ascending effect Effects 0.000 claims description 6
- 230000000243 photosynthetic effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 5
- 244000025254 Cannabis sativa Species 0.000 description 3
- 230000029553 photosynthesis Effects 0.000 description 3
- 238000010672 photosynthesis Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 2
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Abstract
The invention provides a method for calculating the oxygen release amount and the carbon sink amount of green plants, which has accurate calculation result and simple and convenient operation. The method for calculating the carbon sink amount of the green plants comprises the following steps: according to the calculation method of the oxygen release amount of the green plants, the oxygen release amount m of the green plants is obtained through calculationOxygen gas(ii) a Using the formula mCarbon (C)＝mOxygen gas×(MrCO2/MrO2) Calculating the carbon sink amount of the green plants, wherein MrCO2Is CO2Molecular weight of (1), MrO2Is O2Molecular weight of (2).
Description
Technical Field
The invention relates to a method for calculating oxygen release amount and carbon sink amount of green plants, in particular to a method for calculating oxygen release amount and carbon sink amount of green plants in unit area based on an oxygen concentration value.
Background
In recent years, with the increasing global suppression of greenhouse gas emissions, quantitative research on green plant carbon sink has become one of the hotspots in the field of environmental protection.
In China, the carbon sink function of green plants can be effectively evaluated only on the premise of definite quantification of the carbon sink quantity of the existing green plants (such as forest, grass and crops), so that the future environmental protection development direction and the greenhouse gas emission reduction target of China are determined.
Therefore, the carbon sink amount calculation method is basic work for evaluating the ecological benefit of the green plant carbon sink, and on the basis, green plant carbon sink management and economic evaluation can be developed, so that a good foundation is laid for comprehensively developing green plant operation taking carbon sink as a target.
At present, carbon sink metering methods generally adopted at home and abroad mainly comprise a biomass method, an accumulation method, a biomass inventory method, a vortex correlation method, a vorticity covariance method, a relaxation vortex accumulation method and the like. However, none of these methods is able to rapidly and accurately gauge the carbon sink of green plants.
Disclosure of Invention
The present invention has been made in view of the above. The invention aims to provide a method for calculating oxygen release amount and carbon sink amount of green plants.
In the method for calculating the oxygen release amount of the green plants according to the present invention, the method comprises the steps of:
measuring oxygen concentration values around the photosynthesis-enabling parts of the green plants at predetermined average intervals during a first time using a day and night as the first time, calculating an average value of the measured oxygen concentration values during the first time, and taking the average value as a first time average value;
taking continuous at least 3 first time as second time, calculating an oxygen concentration average value in the second time as a second time average value, taking the whole year or the whole growth period of the green plants as third time, and taking the second time average value obtained at the temperature of which the average temperature is higher than biological zero of the green plants as an effective value in the third time;
in a third time, the second time average value is distributed in a parabolic shape, when the second time average value is in an ascending trend, the effective value obtained in advance is subtracted from the effective value obtained in the later time and is summed, when the second time average value is in a descending trend, the effective value obtained in advance is subtracted from the effective value obtained in advance and is summed, and because the second time average value is distributed in a parabolic shape, the interval in which the second time average value is in the ascending trend is bounded by the extreme point of the parabola, the effective value obtained in advance is subtracted from the effective value obtained in the later time and is summed, and when the second time average value is in the descending trend, the effective value obtained in the later time is subtracted from the effective value obtained in the earlier time and is summed, and then the effective values of all the second time average values in the third time are summed;
using the formula mOxygen gasCalculating the oxygen release amount of the green plants in the third time period as rho multiplied by A multiplied by h multiplied by S,
where ρ is the oxygen density, a is the summed value, h is the average height of the green plants over the third time, and S is the area of the green plants.
In the method for calculating the carbon sink amount of the green plants, the method comprises the following steps:
based on the calculation method of the oxygen release amount of the green plants, the oxygen release amount m of the green plants is calculatedOxygen gas；
Using the formula mCarbon (C)＝mOxygen gas×(MrCO2/MrO2) Calculating the carbon sink amount of the green plants,
wherein Mr isCO2Is CO2Molecular weight of (1), MrO2Is O2Molecular weight of (2).
According to the invention, the calculation method of the oxygen release amount and the carbon sink amount of the green plants, which is accurate in calculation result and simple and convenient to operate, is provided.
Detailed Description
Hereinafter, the present invention will be described in detail. It is to be understood that the following description is only illustrative of the present invention and is not limiting.
First, a method of calculating an oxygen release amount of a green plant according to the present invention will be described. The calculation method comprises the following steps:
s110, measuring oxygen concentration values around the photosynthesis-capable part of the green plant at predetermined intervals in a first time, calculating an average value of the measured oxygen concentration values in the first time, and taking the average value as a first average value;
s120, taking continuous not less than 3 first time as second time, calculating the average value of oxygen concentration in the second time as the average value of the second time, taking the whole year or the whole growth period of the green plants as third time, and taking the average value of the second time obtained when the average temperature is higher than the biological zero temperature of the green plants as an effective value in the third time
S130, in a third time, when the second time average value is in an ascending trend, subtracting the effective value obtained in advance from the effective value obtained later and summing the effective values, when the second time average value is in a descending trend, subtracting the effective value obtained in advance from the effective value obtained earlier and summing the effective values, and because the second time average value is distributed in a parabola shape, taking the extreme point of the parabola as a boundary, for the interval in which the second time average value is in the ascending trend, subtracting the effective value obtained in advance from the effective value obtained later and summing the effective values, for the interval in which the second time average value is in the descending trend, subtracting the effective value obtained later from the effective value obtained earlier and summing the effective values, and then summing all the effective values of the second time average value in the third time;
s140, using the formula mOxygen gasCalculating the oxygen release amount of the green plants in the third time period, wherein ρ is the oxygen density, a is the summed value, h is the average height of the green plants in the third time period, and S is the area of the green plants.
In the present invention, unless otherwise specified, the term "green plants" refers to plants such as forest trees, grasses, and crops, which are capable of releasing oxygen, for example, by photosynthesis.
In the present invention, unless otherwise specified, the term "biological zero of green plants" refers to a lower limit temperature during growth and development of green plants, i.e., a lower limit temperature at which green plants can release oxygen. For example, for forest trees, the biological zero is about 8 ℃.
In step S110, the first time is day and night, but the average interval time for measuring the oxygen concentration in the first time is arbitrary, but in order to more accurately represent the average oxygen concentration of day and night, it is preferable to measure once in 5 minutes in the present invention. If the interval time is too short, although the calculation result may be relatively accurate, the operation may be relatively cumbersome, and if the first time is too long, although the operation may be simple, the calculation result may be deviated largely.
Taking continuous not less than 3 first times as the second time, and calculating the average value of oxygen concentration in the second time as the average value of the second time, for example, in some embodiments of the present invention, the second time may be 3 days to 31 days, and preferably 15 days in the present invention.
The third time is the whole year or the whole growth period of the green plants, and the whole year is taken as an example of the present invention
In the present invention, the means for measuring the oxygen concentration value around the photosynthetic part of the green plant is not limited, and the measurement of the oxygen concentration value can be realized, for example, by installing at least one oxygen concentration measuring device at the photosynthetic part of the green plant to be measured (for example, the middle-upper part of the crown in the case of a forest tree).
It should be understood that if a plurality of oxygen concentration measuring devices are used and uniformly distributed on the photosynthetic-capable parts of the green plants, and then an average value of the oxygen concentration values measured by all the oxygen concentration measuring devices is calculated at the time of calculation, the measurement results can be made more accurate.
In step S120, since the green plants usually release oxygen at a temperature higher than biological zero of the green plants, the first average value obtained at the temperature is calculated as an effective value, so that the calculation result is more accurate, and the interference of the invalid value to the calculation result is avoided.
In some embodiments, step S120 further comprises step S121. In step S121, the oxygen concentration value obtained at a temperature at which the average air temperature is higher than biological zero of the green plants in the photosynthetic part of the green plants measured at the predetermined intervals in step S110 is taken as an effective value. Specifically, when combined with step S111, in step S121, the oxygen concentration value of the photosynthetic-capable part of the green plant measured at the second predetermined interval in step S110, obtained at a temperature at which the average air temperature is higher than biological zero of the green plant, is taken as an effective value.
In this way, the selection of the effective value is subdivided into being performed at each measurement, so that the effective value is closer to the true value, and the possibility that the oxygen concentration value obtained under the condition that the temperature at the time of measurement is lower than the part of the green plant capable of photosynthesis, but the average air temperature is higher than biological zero is taken as the effective value is avoided to the maximum extent.
In step S130, the inventors unexpectedly found that the oxygen release amount of the green plants is strongly correlated with the air temperature and the weather, so if the average air temperature and the weather condition in the second time are taken into consideration, the calculation result can be made more accurate. In some seasons where the air temperature and weather conditions vary significantly with the season, the inventor divided the second time average in a parabolic distribution into different intervals, and then calculated the sum of each interval separately, and then summed the sum of each interval. In this case, it is possible to avoid the occurrence of a situation in which the calculation result may deviate when the oxygen release amount at a certain second time with respect to the previous second time is reduced, that is, the oxygen release amount of the green plants at the second time is negative.
For example, in some regions, the months of the year in which the average air temperature is higher than biological zero for green plants are from 3 to 11 months, and the air temperature gradually increases from 3 to 7 months and gradually decreases from 8 to 11 months. In this case, the average oxygen concentration of the green plants at the second time is also similarly changed.
It should be understood that, in step S130, the phrase "the second time average value in the third time is in an upward trend" means that the second time average value is in an upward trend as a whole even though it slightly fluctuates in the third time. Similarly, the phrase "the second time average value in the third time period has a downward trend" means that the second time average value has a downward trend as a whole even if it slightly fluctuates in the third time period. The phrase "the second time average value in the third time period changes in a parabolic wave manner" means that the second time average value has both an interval in which the whole of the second time average value is in an upward trend and an interval in which the whole of the second time average value is in a downward trend in the third time period.
When steps S120 and S130 are executed, taking the 1 st first time as a starting point and the third time as an end point, summing the effective values of the average value of all the second times in the third time, namely the oxygen release amount of the green plants in the third time
In step S140, the inventors also unexpectedly found that formula m is utilizedOxygen gasParticularly, the influence of the average height of the green plants on the oxygen release amount of the green plants is introduced, so that the calculation result can be more accurate.
Note that, as for the average height, when the green plants are woods, if the third time is not too long, the change in height of the woods may be very small and negligible during the third time, and thus the average height is the height of the woods at the start of calculation. When the green plant is grass or crop, if the third time is positive for its fast growing period, the average height is calculated starting from the height at the beginning of the grass or crop calculation and ending at the height at the end of the calculation.
Next, a method of calculating the carbon sink amount of green plants according to the present invention will be described. The calculation method comprises the following steps:
s210, calculating to obtain the oxygen release amount m of the green plants based on the calculation method of the oxygen release amount of the green plantsOxygen gas；
S220, using the formula mCarbon (C)＝mOxygen gas×(MrCO2/MrO2) Calculating the carbon sink amount of the green plants, wherein MrCO2Is CO2Molecular weight of (1), MrO2Is O2Molecular weight of (2).
In the following, a method for calculating oxygen release amount and carbon sink amount of forest trees according to the present invention will be described by taking the example of calculating oxygen release amount and carbon sink amount of forest trees (i.e., green plants in the present application) in 2019 of a common green forest farm in beijing city. In the following example, the first time is 24 hours a day and night, and the predetermined measurement interval time is 5 minutes.
First, an oxygen concentration measuring device is provided in the lower middle part of the tree crown of a forest (i.e., the part of the green plant capable of photosynthesis in the present application) during a day-night period (for example, 24 hours) of the forest, the oxygen concentration value is continuously measured for 24 hours at predetermined intervals of 5 minutes, and then the daily oxygen average value is calculated. The oxygen concentration values and the average oxygen values on day 3, month 17 in 2019 are shown in Table 1. Note that for economy, only the data for 3, 17 and 2019 are given here as an exemplary illustration.
TABLE 12019 years oxygen concentration values and average oxygen concentration values at 3, 17 months
And calculating to obtain an average value of the oxygen concentration at the first time, and calculating to obtain a second average value by taking continuous 15 days as a second time. The first average oxygen concentration and the second average oxygen concentration from 17 days 3 to 30 days 4 and 2019 are shown in tables 2 to 4.
TABLE 22019 first time average and second time average of day 17 of month 3 to day 31 of month 3
| Date | Average oxygen concentration | Date | Average oxygen concentration |
| 2019/3/17 | 20.35140764 | 2019/3/25 | 20.60226667 |
| 2019/3/18 | 20.65580417 | 2019/3/26 | 20.73731458 |
| 2019/3/19 | 20.64917465 | 2019/3/27 | 20.46941458 |
| 2019/3/20 | 20.62543681 | 2019/3/28 | 20.49890868 |
| 2019/3/21 | 20.71750104 | 2019/3/29 | 20.47034583 |
| 2019/3/22 | 20.70662708 | 2019/3/30 | 20.52632 |
| 2019/3/23 | 20.64074583 | 2019/3/31 | 20.58595 |
| 2019/3/24 | 20.70304028 | ||
| Second time average value | 20.59601719 |
TABLE 32019 first and second time averages of 1, 4, month, 4, and 15 days
| Date | Average oxygen concentration | Date | Average oxygen concentration |
| 2019/4/1 | 20.66034 | 2019/4/9 | 20.56272 |
| 2019/4/2 | 20.70324 | 2019/4/10 | 20.63754 |
| 2019/4/3 | 20.83333 | 2019/4/11 | 20.79497 |
| 2019/4/4 | 20.75788 | 2019/4/12 | 20.89802 |
| 2019/4/5 | 20.5974 | 2019/4/13 | 20.83388 |
| 2019/4/6 | 20.76718 | 2019/4/14 | 20.83441 |
| 2019/4/7 | 20.72736 | 2019/4/15 | 20.80759 |
| 2019/4/8 | 20.57917 | ||
| Second time average value | 20.733002 |
TABLE 42019 first and second time averages on days 16, 4 and 30 of month 4
| Date | Average oxygen concentration | Date | Average oxygen concentration |
| 2019/4/16 | 20.808 | 2019/4/24 | 20.795 |
| 2019/4/17 | 20.856 | 2019/4/25 | 20.834 |
| 2019/4/18 | 20.867 | 2019/4/26 | 20.845 |
| 2019/4/19 | 20.656 | 2019/4/27 | 20.812 |
| 2019/4/20 | 20.765 | 2019/4/28 | 20.863 |
| 2019/4/21 | 20.805 | 2019/4/29 | 20.935 |
| 2019/4/22 | 20.868 | 2019/4/30 | 20.934 |
| 2019/4/23 | 20.875 | ||
| Second time average value | 20.835 |
Then, a second average value obtained at a temperature at which the average air temperature is higher than the biological zero degree (in this example, 8 ℃) of the forest trees in the period from 3, 17, and 4, 30, 2019 is taken as an effective value. Since the co-green forest farm in beijing city in this example is located in the cis-defined area, the air temperature in the cis-defined area is used as a criterion. The average temperature in the area of misgies in Beijing City between 2019, 3 and 17 days to 3 and 31 days is shown in Table 5. Likewise, for economy, only the data from 17 days on month 3 to 31 days on month 3 in 2019 are given as an exemplary illustration.
TABLE 5 average air temperature in cisterm of Beijing City, 2019, 3, 17 days-3, 31 days
| Date | Maximum air temperature | Lowest air temperature | Mean air temperature |
| 2019/3/17 | 19 | 5 | 12 |
| 2019/3/18 | 20 | 5 | 12.5 |
| 2019/3/19 | 24 | 11 | 17.5 |
| 2019/3/20 | 19 | 6 | 12.5 |
| 2019/3/21 | 12 | 0 | 6 |
| 2019/3/22 | 14 | 4 | 9 |
| 2019/3/23 | 13 | 1 | 7 |
| 2019/3/24 | 20 | 3 | 11.5 |
| 2019/3/25 | 22 | 5 | 13.5 |
| 2019/3/26 | 17 | 4 | 10.5 |
| 2019/3/27 | 22 | 6 | 14 |
| 2019/3/28 | 9 | 1 | 5 |
| 2019/3/29 | 14 | 4 | 9 |
| 2019/3/30 | 10 | 0 | 5 |
| 2019/3/31 | 15 | 1 | 8 |
| Mean air temperature | 10.3 |
Since the average temperature was higher than 8 ℃ every 15 days from 17 months to 30 months from 3 months to 4 months in 2019, the second average values obtained during this period were all effective values.
Then, the second average value in table 3 was subtracted from the second average value in table 4, and the second average value in table 2 was subtracted from the second average value in table 3, and the obtained values were added. That is, (20.733-20.596) + (20.835-20.733) ═ 0.239 (vol%).
Then, using the formula mOxygen gasCalculating the oxygen release amount of the trees per mu in the co-green forest farm of Beijing city of Beijing 4 months in 2019, wherein the area per mu is 666 square meters, and the average height of the trees is 22 meters. I.e. mOxygen gas1.429 × 0.239 × 22 × 666 ═ 8187 (kg).
Finally, based on the oxygen release amount of the forest trees obtained by the calculation, the formula m is utilizedCarbon (C)＝mOxygen gas×(MrCO2/MrO2) And calculating the carbon sink amount of the trees per mu in the green forest farm of Beijing City of 4 months in 2019. I.e. mCarbon (C)8187 × (44/32) ═ 11257 (kg).
Although the method for calculating the oxygen release amount and the carbon sink amount of the forest according to the invention is described above by taking the green forest farm in Beijing City and the 4 th month in 2019 as an example, it should be understood that the invention is not limited by regions and time. In other words, the calculation method can be used for calculating the oxygen release amount and the carbon sink amount of the forest at any time in any area. For example, if the oxygen release amount and carbon sink amount of the forest trees in 11 months in 2019 of the common green forest farm in beijing are to be calculated, since the average air temperature in the beijing area usually changes in a wavy line with 7 months and/or 8 months as extreme points, the effective value obtained later should be subtracted from the effective value obtained earlier and summed at this time, contrary to the case of calculating 4 months in 2019. For the sake of brevity, a detailed description thereof is omitted.
While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (4)
1. A method for calculating oxygen release amount of green plants is characterized by comprising the following steps:
measuring oxygen concentration values around a photosynthetic-capable part of the green plant at uniform intervals of not less than 7 times per day and night, calculating an average value of the measured oxygen concentration values in the first time, and taking the average value as a first time average value, using the day and night as the first time;
taking continuous at least 3 first time as second time, calculating the average value of oxygen concentration in the second time as the average value of the second time, taking the whole year or the whole growth period of the green plants as third time, and taking all the average values of the second time obtained at the temperature of which the average temperature is higher than biological zero of the green plants as effective values in the third time;
in a third time, the second time average value is distributed in a parabolic shape, when the second time average value is in an ascending trend, the effective value obtained in advance is subtracted from the effective value obtained in the later time and is summed, when the second time average value is in a descending trend, the effective value obtained in advance is subtracted from the effective value obtained in advance and is summed, and because the second time average value is distributed in the parabolic shape, the interval in which the second time average value is in the ascending trend is bounded by the extreme point of the parabola, the effective value obtained in the later time is subtracted from the effective value obtained in advance and is summed, and when the second time average value is in the descending trend, the effective value obtained in the later time is subtracted from the effective value obtained in the earlier time and is summed, and then the effective values of all the second time average values in the third time are summed;
using the formula mOxygen gasCalculating the oxygen release amount of the green plants in the third time period as rho multiplied by A multiplied by h multiplied by S,
where ρ is the oxygen density, a is the summed value, h is the average height of the green plants over the third time, and S is the area of the green plants.
2. The computing method of claim 1, wherein the second time period is 3 days to 31 days.
3. The calculation method according to claim 1 or 2, wherein the value of the concentration of oxygen around the photosynthetic part of the green plant measured at regular intervals is obtained and the second time-averaged value is obtained as an effective value at a temperature at which the average air temperature is higher than biological zero degrees of the green plant.
4. A method for calculating the carbon sink amount of green plants is characterized by comprising the following steps:
calculating the oxygen release amount m of the green plant based on the calculation method of any one of claims 1 to 3Oxygen gas；
Using the formula mCarbon (C)＝mOxygen gas×(MrCO2/MrO2) Calculating the carbon sink amount of the green plants,
wherein Mr isCO2Is CO2Molecular weight of (1), MrO2Is O2Molecular weight of (2).
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| CN116128956A (en) * | 2023-04-04 | 2023-05-16 | 山东省海洋资源与环境研究院(山东省海洋环境监测中心、山东省水产品质量检验中心) | Method, device and equipment for obtaining seaweed bed carbon sink based on remote sensing image |
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| CN116128956A (en) * | 2023-04-04 | 2023-05-16 | 山东省海洋资源与环境研究院(山东省海洋环境监测中心、山东省水产品质量检验中心) | Method, device and equipment for obtaining seaweed bed carbon sink based on remote sensing image |
| CN116128956B (en) * | 2023-04-04 | 2024-06-07 | 山东省海洋资源与环境研究院(山东省海洋环境监测中心、山东省水产品质量检验中心) | Method, device and equipment for obtaining seaweed bed carbon sink based on remote sensing image |
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