国土资源遥感Issue(3)：55-60,6.DOI:10.6046/gtzyyg.2014.03.09
沙漠地区微波地表发射率年内变化规律与气候因子的关系分析
Relationship between inter-annual variations of microwave land surface emissivity and climate factors over the desert
摘要
Abstract
Microwave land surface emissivity of the Taklimakan Desert was retrieved based on AMSR - E (advanced microwave scanning radiometer-earth observing system) Leval 2A measurements and land surface and atmosphere products from GDAS ( global data assimilation system ) in 2008 under clear atmospheric conditions. Then, the spectral characteristics of the retrieved emissivity were classified and analyzed with respect to the soil types, and the relationships between desert emissivity annual variability and climate factors were also analyzed. The analyses indicate that the desert microwave emissivity and its annual variability are closely related to soil types. Moreover, there is a significant correlation between soil volume water content as well as land skin temperature and inter-annual variations of emissivity, which decreases with both of the two land surface parameters. Furthermore, vegetation coverage, canopy water content and surface roughness depending on the soil moisture are also the influencing factors of emissivity, and the soil moisture is restricted by both the atmospheric total precipitable water and the underlying soil type. Additionally,the surface emissivity of the desert mostly composed of sand observably decreases with the desert depth.关键词
微波地表发射率/沙漠地区/土壤类型/气候因子Key words
microwave land surface emissivity/desert/soil type/climate factors分类
天文与地球科学引用本文复制引用
吴莹,王振会,翁富忠..沙漠地区微波地表发射率年内变化规律与气候因子的关系分析[J].国土资源遥感,2014,(3):55-60,6.基金项目
国家自然科学基金项目(编号:41305033,41275043和41175035)、国家“863计划冶项目“国家高技术研究发展计划资助项目冶(编号:2007AA061901)、江苏高校优势学科建设工程资助项目( PAPD)和南京信息工程大学校科研预研项目(编号:2012X008)共同资助。 （编号:41305033,41275043和41175035）
