Information Extraction Of Saline Dust Storms Based On Spatial Analysis

The lake wetlands are a transition zone between aquatic ecological systems and terrestrialecosystems．It is also one of the most important living environments for human beings，especiallyin the arid and semi-arid areas of Northwestern China．The lake wetland ecosystem not onlyserves as an important media reflecting the dynamics of the local ecology and environment，butalso promotes the interaction between human beings and the nature to maintain a sustainablebalance between the two．Salt dust storm and alkaline dust doping，said after the merger for the salt dust storm，fromlack of water，loose，rough，dry lakebed crusts and nearby saline soil，salt desert，after blown，handling，erosion of wind，the dry ground saline silt，fine clay，soluble salts such as unstableloose particles in different proportion of dopedinto dust，dust，these salt powder under the action ofwind in the form of suspended particles in the air and the proliferation of the surrounding，is astrong naturaldisaster weather phenomenon．In addition to saline composition of salt and alkali rich in loose， nutrient element mustcontain crystal dry lakebed sedimentary rich in organic matter andplant survival，chemicals andtoxic，harmful heavy metal particles are mixed in one．Germination，growth and change，thedevelopment process of alkaline dust storm，not only make the air，food，water and other publicresources mix of bacteria，fungiand other toxic and harmful substances，but also destroyed thegrassland，crops，causing human，livestock produce various Difficult miscellaneous diseases，corrosion and mechanical equipment，the natural ecological environment in the region and even inthe world suffer from to damage，damage．Saline dust particleswind drift，along with the variationof wind speed，wind direction，but also canquickly spread to the higher，more broad area，causedby aerosol particlesconcentration percentage in a wide area increased rapidly，to the regional dustandthe balance of ecological environment and residents daily production，life caused by all kindsof negative feedback effect．At the same time，the Constitution and the influence of saline alkalidust storms is completely different from the ordinary oralready know the traditional meaning of sandstorm，alkaline dust storm is "the world after the ecological disaster" Chernobyl，and this hasbeen understand and agree with the scientists and the United Nations Environment programme．The current study attempts to investigate the dust storm migration pathways．Theintermittently exposed lake bottom of dry lake in the Ebinur Lake region is the primary source forsalt dust storms due to the aggravated salinization degree to the surrounding area．Saline powderssuspended in the air and spread around in the form of partice matter under wind action．It seriouslyendangers the ecological security and socio-economic development of the surrounding area．In thispaper，three remote sensing images combined with the same period of field measurements ofatmospheric dust and surface soil sampling data were used in study area．This paper also analyzesthe mechanisms of regional soil salinization and salt dust storm occurrence．In the meantime，thestudy also explores the degradation caused by salt dust storms in the transmission and impact onthe ecological environment of the settlement process of Ebinur Lake．In this study，we also simulate and predict the migration pathways of salt dust storms．Theresults indicate：(1) There are different degrees of soil salinization phenomena inside the studyarea．The most serious salinization phenomenon occurs around the Ebinur Lake，but becomesgradually weakened towards the peripheral expansion areas．(2)The dynamic change of saline landis closely related to the change of vegetation cover and water area．In the meantime，humanactivity also had a significant impact on the evolution of soil salinization．(3)Band combinationsaline dust storms information in this article is extracted from two combinations1-2-29and20-1-29，its large color discrimination, but also to interpret the results of the classification isbetterï¼›(4) with the MOD35cloud detection product identification in the saline aerosol dust cloudin its misjudgment of the problem，in this paper based on the decision tree cloud detection methodcan clearly identify the boundaries of clear skies and clouds, aerosols for highly accurate anti-hasplayed a supporting roleï¼›(5) saline dust storms occur in the study area, the process of developmentof aerosol optical thickness has obvious diurnal variation, and the date of the change process ismore complex，in which the distribution of its land surface and Alashankou winds closely relatedfactors change dayï¼›(6) Combining atmospheric dust data and surface soil data，as well as the westerly flow direction and airflow path，and the HYSPLIT model，we simulated the transporttrajectories of salt dust for about four months in Mongolia Autonomous Region’s Boertala．Twoweather processes moving path of salt dust storm were observed．The north path was: MongoliaAutonomous Boertalaâ†'Aletaiâ†'Gansuâ†'Inner Mongoliaâ†'Mongoliaâ†'Heilongjiangï¼›Thesoutheastern path was：Mongolia Autonomous Boertala (according four place which were Jinghe，Bole，Wenquan and Alashankou)â†'Wusuâ†'Kuitunâ†'Urumqiâ†'Kurrleâ†'Turpaâ†'Hami．Webelieve the results reveal important information regarding the occurrence and mechanism of actionof salt and dust storms in arid and semi-arid regions．In this study，remote sensing, atmospheric radiative transfer theory，theory combined into oneground visibility，clarity of saline dust storms illustrate the key lies．Discusses the saline duststorm quantitative remote sensing information extraction method，reveals a deep level rise ofsaline dust storm disasters，expanding，dynamic changes of extinction，and promote thecomprehensive application of remote sensing technology，and visibility of atmospheric radiativetransfer theory．To advance estimate，OMV and detect saline dust storm weather hazards researchand findings to improve monitoring and early warning and impact，timeliness and accuracy ofassessment for the prevention and treatment of saline dust storms provide an important scientificbasis．...