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Regional terrestrial ecosystem respiratory monitoring method based on remote sensing

An ecosystem and regional technology, applied in the field of remote sensing applications and satellite remote sensing, can solve the problems of dependence, insufficient expression of heterogeneous information, etc., and achieve the effect of improving accuracy

Inactive Publication Date: 2014-01-15
SATELLITE ENVIRONMENT CENT MINIST OF ENVIRONMENTAL PROTECTION
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Problems solved by technology

In order to solve the problem that the respiration of regional-scale terrestrial ecosystems only depends on meteorological data, and the heterogeneity information of large-scale land cover is not expressive enough

Method used

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  • Regional terrestrial ecosystem respiratory monitoring method based on remote sensing
  • Regional terrestrial ecosystem respiratory monitoring method based on remote sensing
  • Regional terrestrial ecosystem respiratory monitoring method based on remote sensing

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Experimental program
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Embodiment 1

[0049] Taking China (national area) as an example, MODIS satellite remote sensing image data is obtained from NASA (National Aeronautics and Space Administration). The time step is 8 days.

[0050] S1 obtains time series satellite remote sensing image data in China:

[0051] In this embodiment, AVHRR / MODIS (Modified Very High Resolution Radiometer / Modified Resolution Aerospace Imaging Spectrometer) is used as the satellite remote sensing image data source. This is mainly due to the fact that AVHRR / MODIS data has multi-spectral characteristics and a time resolution of 1 day, which can meet the needs of remote sensing monitoring in continuous time series. In order to reduce the influence of cloud cover, the obtained data are 8-day synthetic products of MODIS reflectance in 2001.

[0052] Remote sensing inversion of S2 key parameter FPAR:

[0053] FPAR=1-α-P gap +P gap alpha b (1-K open ) (1)

[0054] P gap =exp(-LAI·Ω(θ sun )·G(θ sun )cosθ sun ) (2) ...

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Abstract

The invention provides a regional terrestrial ecosystem respiratory monitoring method based on remote sensing. The monitoring method comprises the following steps: S1, obtaining time series satellite remote sensing data within a region; S2, performing remote sensing retrieval to key parameters; S3, quantifying key physiological and ecological parameters of different vegetation forms based on land cover or land utilization data; S4, obtaining meteorological interpolation data of time series; S5, carrying out cloud removal to obtain vegetation growing season curve without noise impact; S6, determining the annual respiratory capacity of the regional terrestrial ecosystem. The method is based on the time series remote sensing data, considers spatial difference of the vegetation form, determines the ecosystem respiratory algorithm within the region, solves the problem that the regional terrestrial ecosystem respiratory monitoring only relies on meteorological data but is insufficient to express heterogeneous information of the land cover within large scale, improves the precision of regional scale ecosystem respiratory estimation, and accurately and quantitatively describes temporal dynamics of the respiration in different ecosystems.

Description

technical field [0001] The invention relates to the technical field of satellite remote sensing, in particular to a method for calculating the respiration of a regional terrestrial ecosystem by using visible light and near-infrared information provided by satellite remote sensing images combined with meteorological information observed on the ground. The method can determine the seasonal dynamics and annual total amount of regional terrestrial ecosystem respiration by estimating and accumulating ecosystem respiration in time series, and belongs to the technical field of remote sensing applications. Background technique [0002] Terrestrial ecosystem respiration is one of the most important carbon flux components in the global carbon cycle and plays a decisive role in the net carbon budget of specific ecosystems. Accurate estimation of ecosystem respiration on a regional scale is the basis and premise for evaluating carbon source / sink functions of regional and global ecosyste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V8/10
Inventor 高彦华周旭陈良富何洪林刘敏王昌佐
Owner SATELLITE ENVIRONMENT CENT MINIST OF ENVIRONMENTAL PROTECTION
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