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Wetland landscape surface layer cold and wet climatic element GIS space simulation method based on remote sensing data

A technology for wetland landscape, cold and wet climate, applied in the fields of climate sustainability, electrical digital data processing, special data processing applications, etc., can solve the problem of inability to obtain high-precision temperature spatial distribution, etc. The effect of increasing the amount of radiation and improving the radiometric resolution

Inactive Publication Date: 2013-08-21
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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Problems solved by technology

[0004] In order to solve the problem that the existing spatial interpolation method cannot obtain high-precision air temperature spatial distribution, the present invention provides a GIS spatial simulation method based on remote sensing data for wetland landscape near-surface cold and wet climate elements

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  • Wetland landscape surface layer cold and wet climatic element GIS space simulation method based on remote sensing data
  • Wetland landscape surface layer cold and wet climatic element GIS space simulation method based on remote sensing data
  • Wetland landscape surface layer cold and wet climatic element GIS space simulation method based on remote sensing data

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specific Embodiment approach 1

[0049] Specific implementation mode 1. Combination figure 1 - Fig. 9 illustrates a kind of remote sensing data-based GIS spatial simulation method of wetland landscape near-surface cold and wet climate elements in this embodiment, which includes the following steps:

[0050] Step 1: Obtain the vegetation index data set NDVI, the land surface temperature data set LST and the precipitable precipitation data set Pw of MODIS remote sensing images in the study area, and perform data processing;

[0051] Step 2: Use the vegetation index data set NDVI and the surface temperature data set LST described in step 1 to establish a near-surface temperature inversion model to obtain the spatial distribution of the internal temperature of wetland patches and dryland patches;

[0052] Step 3: use the surface temperature data set LST and the precipitable precipitation data set Pw described in step 1 to establish a near-surface relative humidity inversion model to obtain the spatial distributio...

specific Embodiment

[0094] Step 1: Obtain MODIS (Moderate-resolution Imaging Spectroradiometer) 16-day vegetation index dataset NDVI, 8-day surface temperature dataset LST and daily precipitation data from the US Geological Survey (USGG) website Set Pw and perform data processing;

[0095] Using MRT and HEG software, all MODIS HDF files are image stitched and projectively converted, Albers projection is selected, the reference ellipsoid is WGS84, and the radiometric calibration is carried out for a set of research area clipping;

[0096] Obtain the spatial distribution of water bodies through land use data, perform water masking on vegetation index data set NDVI, land surface temperature data set LST, and precipitable precipitation data set Pw, and remove outliers and invalid values; then, perform cloud processing to remove Outliers and invalid values ​​affected by the cloud.

[0097] At 8-day intervals, the morning near-infrared and infrared data of the daily precipitable precipitation data set a...

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Abstract

The invention provides a wetland landscape surface layer cold and wet climatic element GIS space simulation method based on remote sensing data, and relates to the wetland landscape surface layer cold and wet climate space simulation method based on the remote sensing data. The method solves the problem that temperature space distribution with high precision cannot be obtained in an existing space interpolation method. The method includes the steps of obtaining vegetation index data set NDVI of an MODIS remote-sensing image in a research area, a surface temperature data set LST and a precipitable water data set Pw, building an inversion model of surface layer temperatures and relative humidity, obtaining space distribution of internal temperatures and surface layer relative humidity of wetland patches and dry land patches, obtaining an average value of surface layer cold and wet climatic elements of the wetland patches and the dry land patches, building a horizontal changing model of a cold and wet climate element edge effect, and carrying out space simulation on surface layer temperature and humidity under a wetland landscape scale by means of GIS techniques. The method can be widely applied to the space simulation of wetland landscape climate.

Description

technical field [0001] The invention relates to a method for spatially simulating the cold and wet climate of the wetland landscape near the ground layer based on remote sensing data. Background technique [0002] In the face of global environmental changes in recent decades, the issue of regional wetland landscape change under the disturbance of human activities has become an important content of global change research, especially the research on wetland landscape change and its climatic effects has become a research hotspot and coordinated wetland protection and the basis for the sustainable development of the regional economy. Therefore, accurately obtaining the spatial distribution of cold and wet climate elements plays a very important role in the research of wetland ecosystem regional climate models, hydrological and ecological models, and global climate responses. [0003] At present, obtaining meteorological data from meteorological station observations is one of th...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCY02A90/10
Inventor 廖晓玉刘兆礼
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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