CN108920857A - A kind of analogy method of the sunlight-induced chlorophyll fluorescence of Computationally efficient - Google Patents
A kind of analogy method of the sunlight-induced chlorophyll fluorescence of Computationally efficient Download PDFInfo
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- 229930002875 chlorophyll Natural products 0.000 title claims abstract description 82
- 235000019804 chlorophyll Nutrition 0.000 title claims abstract description 82
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004088 simulation Methods 0.000 claims abstract description 15
- 230000029553 photosynthesis Effects 0.000 claims description 20
- 238000010672 photosynthesis Methods 0.000 claims description 20
- 230000005855 radiation Effects 0.000 claims description 17
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000027756 respiratory electron transport chain Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 235000013405 beer Nutrition 0.000 claims description 2
- 238000011161 development Methods 0.000 claims description 2
- 238000006862 quantum yield reaction Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004177 carbon cycle Methods 0.000 description 4
- 230000005068 transpiration Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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Abstract
The analogy method of the present invention provides a kind of sunlight-induced chlorophyll fluorescence with Computationally efficient, it is a kind of transmitting of consideration chlorophyll fluorescence, absorbs and Multiple Scattering process, suitable for the canopy chlorophyll fluorescence analogy method of Different ecosystems, belong to the research field of vegetation parameter analogy method.Its step is：Calculate the chlorophyll fluorescence of sun light leaf and shade leaf on leaf scale；Using decaying and Multiple Scattering process of the chlorophyll fluorescence inside canopy, the chlorophyll fluorescence on canopy scale is calculated.The present invention obtains the chlorophyll fluorescence of continuous website scale and Global Scale, the chlorophyll fluorescence of the leaf scale and canopy scale that are obtained simultaneously using simulation, chlorophyll fluorescence for moonscope is corrected, and then the chlorophyll fluorescence of leaf scale is obtained from the chlorophyll fluorescence product inverting of satellite, improve the precision of land primary productivity monitoring.
Description
One, technical field
The analogy method of the present invention relates to a kind of sunlight-induced chlorophyll fluorescence with Computationally efficient, specifically,
Refer to a kind of transmitting of consideration chlorophyll fluorescence, absorb and Multiple Scattering process, is suitable for Different ecosystems, and there is high meter
The canopy chlorophyll fluorescence analogy method for calculating efficiency, belongs to the research field of vegetation parameter analogy method.
Two, background technique
Vegetation is one of the main body of terrestrial life circle, it by the processes such as photosynthetic, breathing, transpiration influence land face and atmosphere it
Between matter and energy exchange, the side such as rise adjusting Global carbon balance, slowing down in atmosphere carbon dioxide isothermal chamber gas concentration
Face has irreplaceable role.The photosynthesis of vegetation is component part important in ecomodel at present, works as vegetation
The transpiration of meeting adjoint vegetation while photosynthesis is carried out, i.e., moisture is from plant surface (mainly blade) with vapor phase
The process being lost in atmosphere, and the transpiration of vegetation also influences whether the calculating of latent heat.The transpiration of plant is also direct
The exchange of moisture between earth's surface and atmosphere is influenced, this is also an important factor for determining precipitation.Therefore, ecomodel needs
More accurate simulation photosynthesis, this is to water circulation, carbon cycle and the Land surface energy budget in the world's ecosystems
Simulation have a significant impact.
The amount that plant passes through photosynthesis institute's carbon sequestration within the unit time is vegetation gross primary productivity, it is determined
The parent material and energy for entering terrestrial ecosystems, are the matter and energy sources of vegetation growth, influence each carbon storehouse of vegetation
Sendout, net primary productivity etc.；On the other hand, vegetation gross primary productivity be illuminated by the light intensity, atmospheric carbon dioxide concentration,
The influence of temperature, water grading factors.Therefore vegetation gross primary productivity is the important knob for contacting terrestrial carbon cycle and atmosphere carbon storehouse
Band, plays the role of vital in entire Terrestrial Ecosystem Carbon Cycle, and land vegetation ecosystem is always primary at present
Production force evaluating mainly uses surface process parameterization, ecological models and the light use efficiency model based on remote sensing observations, but
It is due to model structure, parameter and input data etc., the estimation of "current" model vegetation gross primary productivity remains
In biggish uncertainty.
The chlorophyll fluorescence remote sensing to grow up recent years is that the estimation of land vegetation ecosystem gross primary productivity mentions
New idea and method is supplied.The photosynthesis Net long wave radiation about 1-2% of Chlorophyll absorption can be converted into chlorophyll fluorescence
Radiation, this is substantially one kind " luminous " phenomenons that plant is 650 to 800nm in wavelength, and chlorophyll fluorescence is 685nm in wavelength
There are two peak values with two wave bands of 740nm, can directly reflect the dynamic change of plant actual photosynthesis effect.Satellite chlorophyll is glimmering
This new method is greatly facilitated in the application in global carbon field in the successful inverting of light, so that utilizing chlorophyll fluorescence remote sensing
Region and Global Scale plant photosynthesis are monitored, and then estimates that terrestrial ecosystems gross primary productivity becomes a reality.Vegetation
Chlorophyll fluorescence is closely related with photosynthesis, can directly reflect the state of actual photosynthesis effect.
In recent years, some ecological models start to develop chlorophyll fluorescence analogy method, for improving the simulation energy of carbon cycle
Power.SCOPE model more early develops chlorophyll fluorescence and photosynthesis coupling model, the chlorophyll fluorescence model in SCOPE be by
Vegetation canopy is divided into 60 layers, and every layer is simulated 13 azimuths and 36 inclination angles respectively, has been described in more detail on leaf scale
Chlorophyll fluorescence excitation, absorb and scattering process, but the calculation amount of this model is larger, process is complicated, input parameter ratio
It is more, therefore SCOPE model is difficult to realize the simulation of the chlorophyll fluorescence on Global Scale.
In order to realize the simulation of chlorophyll fluorescence on Global Scale, need to develop a kind of new consideration chlorophyll fluorescence hair
It penetrates, absorb and Multiple Scattering process, be suitable for Different ecosystems, and the canopy chlorophyll fluorescence with higher computing efficiency
Analogy method reduces ecomodel for the uncertainty of the simulation of global carbon.
Three, summary of the invention
The purpose of the present invention is：
The method of a set of Vegetation canopy chlorophyll fluorescence with Computationally efficient is provided, for simulating leaf on leaf scale
Green element fluorescent emission, absorption and Multiple Scattering process, and then obtain being suitable for Different ecosystems, and there is Computationally efficient
Canopy chlorophyll fluorescence analogy method.This chlorophyll fluorescence analogy method is coupled in ecological models, is simulated
Obtain chlorophyll fluorescence on Global Scale.
The principle of the present invention is as follows：
The practical electron transfer rate and maximum electronics being calculated using Photosynthesis Model existing in ecological model
The chlorophyll fluorescence on leaf scale is calculated in transmission rate, according to canopy radiation transmission principle, is calculated and is suitable for not
The chlorophyll fluorescence of the canopy scale of Multiple Scattering process is considered with the ecosystem.By this chlorophyll fluorescence analogy method coupling
It closes in ecological models, inverting obtains chlorophyll fluorescence on Global Scale.
(1) chlorophyll fluorescence on leaf scale
The solar energy that blade absorbs is used for the following aspects：Photosynthesis φP, Photochemical quenching φD, non-photochemical
Be quenched φNAnd chlorophyll fluorescence process φF.Therefore：
The chlorophyll fluorescence observed under the conditions of the different light of photosynthesis rate indicates：
WhereinMaximum fluorescence amount of radiation when light radiation is saturated, kPIt is 0,For：
Then obtain fluorescence quantum yield：
Wherein kF=0.05 and kD=max (0.03T+0.0773,0.087), T are Celsius temperature, kNCalculation formula be：
Wherein,A=2.83, b=0.114, JeAnd JoThe practical electron-transport speed calculated for Photosynthesis Model
Rate and maximum electron transfer rate.
The chlorophyll fluorescence of leaf scale is：
SIFe=APAR φF (8)
Wherein, APAR is the photosynthesis Net long wave radiation that blade absorbs, φFFor the ratio for absorbing photon Determination of Chlorophyll fluorescence
Example.
(2) chlorophyll fluorescence on canopy scale
The chlorophyll fluorescence of blade excitation will receive the influence of canopy road radiation transmission process, in canopy through overdamping and
Scattering process, the chlorophyll fluorescence (SIF on canopyc) be：
SIFc=SIFsunLAIsun+SIFshadLAIshad (9)
SIF in formulasunAnd SIFshadRespectively indicate the fluorescence of the sun light leaf and shade leaf in canopy, LAIsunAnd LAIshadTable respectively
Show the leaf area of sun light leaf and shade leaf.
SIF in formulae_sunAnd SIFe_shadRespectively indicate the fluorescence of the sun light leaf and shade leaf leaf scale in canopy, αsunAnd βsun
Decaying and scattering coefficient for sun light leaf fluorescence, αshadAnd βshadDecaying and scattering coefficient for shade leaf fluorescence.
Beer law is deferred in decaying of the chlorophyll fluorescence in canopy, therefore the calculation formula of attenuation coefficient is：
Wherein θ is solar elevation, and Ω is concentration class index, and G (θ) is G-function, intercepts spoke for unit of account leaf area
The ratio penetrated.
The calculation formula of scattering coefficient is：
Specifically have the beneficial effect that：
The present invention utilizes the chlorophyll fluorescence analogy method of leaf scale, high in conjunction with the calculation method of canopy radiation transmission
The chlorophyll fluorescence of the simulation canopy scale of effect, this chlorophyll fluorescence analogy method is coupled in ecological models, into
And chlorophyll fluorescence on simulation of global scale, while the chlorophyll fluorescence of the blade and canopy scale obtained using simulation, it corrects
The fluorescent product of satellite obtains the chlorophyll fluorescence of the leaf scale of Satellite.
Four, Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is that website scale chlorophyll fluorescence simulates effect picture；
Fig. 3 is that Global Scale chlorophyll fluorescence simulates effect picture；
Five, specific embodiment
The present invention is further explained below by way of example：
By the chlorophyll fluorescence Model coupling of development into BEPS ecomodel, and using observational data single website with
And Global Scale assessment simulation effect.
In order to assess the simulation effect of fluorescence, using 1 hour flux observational data at the station Harvard in 2013 as BEPS
The driving data of single-point model real situation, driving data include temperature, precipitation, downward shortwave radiation, relative humidity and air pressure,
The model time of integration is since on January 1st, 2013, to 31 end of day December in 2013.Attached drawing 2 gives the leaf of modeling
Green element fluorescence is compared with observation.
In order to assess simulation effect of the fluorescence on Global Scale, divided again using the meteorology of 2015-2016 European center
It analyses data (temperature, precipitation, downward shortwave radiation, relative humidity and air pressure) and drives BEPS model, the time resolution of driving data
Rate is 1 hour, and spatial resolution is 1 ° × 1 °, and the model time of integration is since on January 1st, 2015, to December 31 in 2016
End of day.Using the fluorescent product of the OCO-2 satellite of 2015-2016, model result is assessed.Attached drawing 3 gives mould
The quasi- chlorophyll fluorescence of pattern is compared with satellite data.
According to the proposed method, the simulation of efficient acquisition station point scale and the chlorophyll fluorescence in global range
As a result, and respectively simulate leaf scale and canopy scale chlorophyll fluorescence, improve for Global land plant photosynthesis
Monitoring capability.
Claims (3)
1. a kind of analogy method of the sunlight-induced chlorophyll fluorescence of Computationally efficient, mainly includes the following steps that：
(1) chlorophyll fluorescence on leaf scale
The solar energy that blade absorbs is used for the following aspects：Photosynthesis φP, Photochemical quenching φD, non-photochemistry quenches
Go out φNAnd chlorophyll fluorescence process φF.Therefore：
The chlorophyll fluorescence observed under the conditions of the different light of photosynthesis rate indicates：
WhereinMaximum fluorescence amount of radiation when light radiation is saturated, kPIt is 0,For：
Then obtain fluorescence quantum yield：
Wherein kF=0.05 and kD=max (0.03T+0.0773,0.087), T are Celsius temperature, kNCalculation formula be：
Wherein,A=2.83, b=0.114, JeAnd JoFor Photosynthesis Model calculate practical electron transfer rate and
Maximum electron transfer rate.The chlorophyll fluorescence of leaf scale is：
SIFe=APAR φF (8)
Wherein, APAR is the photosynthesis Net long wave radiation that blade absorbs, φFFor the ratio for absorbing photon Determination of Chlorophyll fluorescence.
(2) chlorophyll fluorescence on canopy scale
The chlorophyll fluorescence of blade excitation will receive the influence of canopy road radiation transmission process, through overdamping and scattering in canopy
Process, the chlorophyll fluorescence (SIF on canopyc) be：
SIFc=SIFsunLAIsun+SIFshadLAIshad (9)
SIF in formulasunAnd SIFshadRespectively indicate the fluorescence of the sun light leaf and shade leaf in canopy, LAIsunAnd LAIshadRespectively indicate sun
The leaf area of leaf and shade leaf.
SIF in formulae_sunAnd SIFe_shadRespectively indicate the fluorescence of the sun light leaf and shade leaf leaf scale in canopy, αsunAnd βsunFor sun
The decaying of leaf fluorescence and scattering coefficient, αshadAnd βshadDecaying and scattering coefficient for shade leaf fluorescence.
Beer law is deferred in decaying of the chlorophyll fluorescence in canopy, therefore the calculation formula of attenuation coefficient is：
Wherein θ is solar elevation, and Ω is concentration class index, and G (θ) is G-function, intercepts radiation for unit of account leaf area
Ratio.The calculation formula of scattering coefficient is：
2. a kind of analogy method of the sunlight-induced chlorophyll fluorescence of Computationally efficient according to claim 1, feature
It is in step (2), using the chlorophyll fluorescence calculation method on existing leaf scale, it is green improves leaf on entire canopy scale
The calculating of plain fluorescence calculates separately the chlorophyll fluorescence excited on blade inside canopy according to canopy radiation transmission principle
Road radiation transmission process calculates attenuation process of the chlorophyll fluorescence inside canopy first with formula (11), recycles formula
(12) Multiple Scattering process of the chlorophyll fluorescence inside canopy is calculated, canopy scale finally is calculated using formula (9-10)
On chlorophyll fluorescence.
3. a kind of analogy method of the sunlight-induced chlorophyll fluorescence of Computationally efficient according to claim 1, feature
It is in step (1) and (2), a kind of integrated development chlorophyll fluorescence slave leaf scale to canopy scale of Computationally efficient
Calculation method, using the chlorophyll fluorescence of leaf scale and canopy scale that simulation obtains, the chlorophyll for moonscope is glimmering
Light is corrected, and obtains the chlorophyll fluorescence of leaf scale from the chlorophyll fluorescence product inverting of satellite.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900672A (en) * | 2019-04-02 | 2019-06-18 | 中国人民解放军战略支援部队航天工程大学 | A method of shade leaf and sun light leaf chlorophyll fluorescence are separated using high-spectrum remote-sensing |
| CN113670872A (en) * | 2021-08-18 | 2021-11-19 | 中国地质大学（武汉） | Method and system for acquiring sunlight-induced chlorophyll fluorescence data |
| CN116992682A (en) * | 2023-08-16 | 2023-11-03 | 南京大学 | Method for estimating total primary productivity by exciting sunlight-induced chlorophyll fluorescence by yin-yang leaves |
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| CN116992682A (en) * | 2023-08-16 | 2023-11-03 | 南京大学 | Method for estimating total primary productivity by exciting sunlight-induced chlorophyll fluorescence by yin-yang leaves |
| CN116992682B (en) * | 2023-08-16 | 2024-03-19 | 南京大学 | Method for estimating total primary productivity by exciting sunlight-induced chlorophyll fluorescence by yin-yang leaves |
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