Arid region carbon flux estimation method based on box type method and taking precipitation influence into consideration

A technology of carbon flux and arid areas, applied in calculation, instrumentation, electrical digital data processing, etc., can solve the problems of uncertainty and heavy workload of carbon budget observation, improve accuracy and rationality, and reduce field Observing the workload and expanding the effect of applicability

Active Publication Date: 2016-06-22
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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Problems solved by technology

It can be seen that the traditional mathematical average method for estimating the carbon budget has the disadvantages of heavy observation workload, especially the estimation results and great uncertainty.

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  • Arid region carbon flux estimation method based on box type method and taking precipitation influence into consideration
  • Arid region carbon flux estimation method based on box type method and taking precipitation influence into consideration
  • Arid region carbon flux estimation method based on box type method and taking precipitation influence into consideration

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Embodiment Construction

[0032] In the following, the present invention will be further described in detail in combination with the estimation of the carbon flux in the southeastern margin of the Tengger Desert (37°29′N, 104°25′E) in a typical arid region.

[0033] Estimation method of the present invention is realized through the following steps:

[0034] 1. Sensitivity observation of carbon flux response to precipitation events

[0035] Using the box method to utilize CO 2 / H 2 O gas analyzer (LI-840A, Li-Cor, USA), observed the net carbon flux (NEE) and ecosystem after natural precipitation events of different sizes during the peak plant growth season from July to September 2012-2014 Dynamics of total respiration (RE) diurnal exchange rates, with each observation lasting several days until the diurnal exchange rate of carbon flux returns to the drought-state constant.

[0036] 2. Classification of precipitation events

[0037] According to the statistical analysis of multi-year precipitation da...

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Abstract

The invention provides an arid region carbon flux estimation method based on a box type method and taking the precipitation influence into consideration. The method comprises the first step of observing responding sensibility of carbon flux to different precipitation events; the second step of dividing grades of the precipitation events, wherein the precipitation events are sequentially divided into five grades (P0, P1, P2, P3 and P4) from small to big, P0 is zero precipitation (no precipitation event occurs), P1, P2 and P3 are precipitation event occurrence probability bodies, and P4 is an extremely-large precipitation event; the third step of establishing a responding model and conducting parameterization, wherein the responding model of carbon flux to the precipitation events is established, and corresponding model parameters are determined; the fourth step of estimating the carbon flux, wherein the carbon flux estimation value in the estimation time frame is obtained by calculating and calculating sum of the calculus of the carbon flux of the precipitation events of the different grades according to the different precipitation event static results and the responding model in the research region. The method has the advantages that calculation is easy, the estimation accuracy is high and the outdoor workload is low and can be widely applied to arid region carbon flux monitoring, carbon cycling and related research fields.

Description

technical field [0001] The invention relates to a scheme for estimating carbon flux, specifically a method for estimating carbon flux based on box method and considering the influence of precipitation on carbon flux fluctuation. Background technique [0002] Carbon flux estimation is a key technical link in the study of carbon cycle and carbon budget under the background of global change. Using the box method (static box method) for carbon flux observation has the advantages of simple operation, low cost, and the ability to observe various carbon flux components, and has been widely recognized and widely used internationally. However, when the box method is used to estimate carbon energy on a relatively long time scale such as seasonal or interannual, the traditional method is to estimate multiple observations using the mathematical average method, but there are two unavoidable problems in this estimation method. First, it requires intensive and heavy observation work in ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 王增如李新荣李立超高艳红杨昊天
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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