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A remote sensing estimation method for the black carbon concentration in accumulated snow

A concentration, black carbon technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problems of difficult to obtain and update the black carbon content quickly, labor and time-consuming, etc., to achieve simple and easy implementation steps and reduce work. volume, increased flexibility and usability

Active Publication Date: 2016-10-12
NANJING UNIV
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Problems solved by technology

Although this method is highly accurate, it is labor-intensive and time-consuming, and it is difficult to quickly obtain and update the black carbon content in large-scale snow accumulation

Method used

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  • A remote sensing estimation method for the black carbon concentration in accumulated snow
  • A remote sensing estimation method for the black carbon concentration in accumulated snow
  • A remote sensing estimation method for the black carbon concentration in accumulated snow

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Embodiment Construction

[0032] The present invention will be described in detail below according to the accompanying drawings, so that the purpose and effect of the present invention will become more obvious.

[0033] Such as figure 1 Shown is a flow chart of the remote sensing method for estimating black carbon concentration in a kind of snow of the present invention, and the specific steps are as follows:

[0034] The first step is to use the black carbon concentration data in the snow measured at the ground stations given in the existing literature (the paper "Black carbon in seasonal snow across northern Xinjiang in northwestern China" by Ye et al. in ENVIRONMENTAL RESEARCH LETTERS in 2012), according to Site location and measurement time, download the MODIS daily snow cover synthesis products (MOD10A1 and MYD10A1) corresponding to the time and area.

[0035] In this step, there are a total of 32 ground stations given in the existing literature. The research area is the northern Xinjiang region,...

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Abstract

The invention relates to a remote sensing estimation method for the black carbon concentration in accumulated snow. The method performs regional scale black carbon concentration estimation based on the combination of MODIS daily accumulated snow synthetic products (MOD10A1 and MYD10A1) with a 500 meter spatial resolution and actually-measured black carbon concentration data of ground stations. The method comprises the steps of performing image fusion, map projection conversion and data format conversion on the MODIS daily accumulated snow products to acquire research area accumulated snow albedo data; performing cloud-removing synthesizing processing on images, extracting the accumulated snow albedos of ground station positions, referring to corresponding documents, establishing a relation model of snow albedo and black carbon concentration, and performing inspection and repeated optimization on the relation model; processing the accumulated snow albedo images by using the relation model and acquiring the spatial and temporal distribution result of the black carbon concentration in accumulated snow by using research area vector boundary data interception. Compared with the conventional methods, the method employs the remote sensing technology and thus can obtain the spatial and temporal feature data of the black carbon concentration distribution in large-scale accumulated snow effectively.

Description

technical field [0001] The invention relates to a remote sensing estimation method for black carbon concentration in snow accumulation, and belongs to the technical field of atmospheric environment remote sensing application. Background technique [0002] Black carbon (Black Carbon) aerosol is a kind of black carbonaceous particles suspended in the air. It is an important part of atmospheric fine particles and has a very important impact on the atmospheric environment and human health. Black carbon particles in snow can significantly reduce snow albedo, enhance the absorption of solar radiation, accelerate snow melting, and cause significant climate effects and hydrological cycle effects. Therefore, the study of black carbon content in ice and snow and its temporal and spatial distribution characteristics are helpful to enhance the understanding of climate change and regional water cycle. [0003] At present, many observational studies have been carried out on the content o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 柯长青马东辉蔡宇邵珠德赵佳曼
Owner NANJING UNIV
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