利用微波地表发射率模型, 模拟计算了沙漠地区石英、 砂岩、 花岗岩和石灰石不同粒子尺度、 砂土含量和土壤含水量时的地表发射率频谱， 并用先进微波扫描辐射计-地球观测系统AMSR—E资料对塔克拉玛干沙漠地区进行了地表发射率卫星反演和模型模拟计算的对比研究， 分析了该地区不同地表类型和矿物成分的微波地表发射率特征。结果表明， 微波地表发射率和地表类型密切相关， 并且随着土壤含水量、 土壤质地、 矿物成分和土壤粒子尺度的不同存在显著变化， 成为现有微波地表发射率模型用于沙漠地区模拟计算结果的误差主要来源。根据沙漠地区准确的土壤类型、 土壤组分比例、 粒径尺度和矿物颗粒等信息对近地表土壤进行了辐射传输过程的分层分析， 为改进现有微波地表发射率计算模型提供理论依据。
The characteristics of microwave land surface emissivity different types of soil and different minerals in desert region is studied. Emissivities of four kinds of the most abundant desert materials, i.e. quartz, sandstone, granite and limestone with different particle size, sand fractions and soil moistures are simulated using a microwave land surface emissivity model. And also, the simulated emissivity of Taklimakan Desert is compared with satellite retrieval values from AMSR-E measurements, the result shows that the microwave land surface emissivity is closely related with surface types, and also significantly vary with soil moisture, soil texture, mineral component and soil particle size, which are the main sources of errors of current land emissivity simulation. Moreover, the results provide a theoretical basis for the further improving the existing microwave land surface emissivity model by stratifying near surface soil and analyzing radiative transfer process of multi-layer soil with accurate soil types, soil textural components, particle size scales and mineral material datasets in desert region.
[1]张堂堂, 文军, Rogier Vander Velde, 等. 基于ENVISAT/ASAR资料的土壤湿度反演方法[J]. 高原气象, 2008, 27(2): 279-285.
[2]赵逸舟, 马耀明, 黄镇, 等. 利用TRMM/TMI资料反演青藏高原中部土壤湿度[J]. 高原气象, 2007, 26(5): 952-957.
[3]刘华强, 孙照渤, 王举, 等. 青藏高原东西部积雪效应的模拟对比分析[J]. 高原气象, 2005, 24(3): 357-365.
[4]张培昌, 王振会. 大气微波遥感基础[M]. 北京: 气象出版社, 1995: 412.
[5]张利红, 沈桐立, 王洪利. AMSU资料变分同化及在暴雨数值模拟中的应用研究[J]. 高原气象, 2007, 26(5): 1004-1012.
[6]Jones A S, Vonder Haar T H. Retrieval of surface emittance over land using coincident microwave and infrared satellite measurements [J]. J Geophys Res, 1997, 102: 13609-13626.
[7]Prigent C, Rossow W B, Matthews E. Microwave land surface emissivities estimated from SSM/I observations[J]. J Geophys Res, 1997, 102: 21867-21890.
[8]Prigent C, Aires F, Rosso W B. Land surface microwave emissivities over the globe for a decade[J]. Bull Amer Meteor Soc, 2006, 87: 1573-1584.
[9]Prigent C, Wigneron J P, Rossow W B, et al. Frequency and angular variations of land surface microwave emissivities: Can we estimate SSM/T and AMSU emissivities from SSM/I emissivities?[J] IEEE Transactions on Geoscience Remote Sensing, 2000, 38: 2373-2386.
[10]Hong G, Heygester G, Qunzi K, et al. Retrieval of microwave surface emissivity at TMI frequencies in Shouxian [J]. Adv Atmos Sci, 2003, 20(2): 253-259.
[11]谷松岩, 邱红, 张文建. 先进微波探测器资料反演地表微波辐射率试验[J]. 电波科学学报, 2004, 19(4): 452-457.
[12]谷松岩, 张文建, 邱红. SSM/I 资料反演大范围地表湿度试验[J]. 应用气象学报, 2004, 15(4): 407-417.
[13]何文英, 陈洪滨. 中国江淮、 黄淮地区陆面微波比辐射率的变化特征[J]. 遥感技术与应用, 2009, 24(3): 297-303.
[14]张勇攀, 蒋玲梅, 邱玉宝, 等. 不同地物类型微波发射率特征分析[J]. 光谱学与光谱分析, 2010, 30(6): 1446-1451.
[15]Choudhury B J, Chang A T C. Two-stream theory of reflectance of snow[J]. IEEE Transactions on Geoscience Electronics, 1979, 17（1）: 63-68.
[16]Wang J R, Schmugge T J. An empirical model for the complex dielectric permittivity of soils as a function of water content [J]. IEEE Transactions on Geoscience Remote Sensing, 1980, 18（4）: 288-295.
[17]Mo T, Choudhury B J, Schmugge T J, et al. A model for microwave emission from vegetation-covered fields[J]. J Geophys Res, 1982, 87: 11229-11237.
[18]Wegmuller U, Mfitzler C, Njoku E G. Canopy opacity models, Passive microwave remote sensing of land-atmosphere interactions[M]. VSP BV, Utrecht, Netherlands, 1995: 380-384.
[19]Fung A K. Microwave Scattering and Emission Models and Their Applications[C]. Artech House, Norwood, Mass, 1994: 419-423.
[20]Weng F, Yan B, Grody N C. A microwave land emissivity model[J]. J Geophys Res, 2001, 106(D17): 20115-20123.
[21]顾松强, 王振会, 翁富忠, 等. 利用NOAA/AMSU资料和GRAPES同化系统对陆面比辐射率计算的改进研究[J]. 高原气象, 2006, 25(6): 1101-1106.
[22]Grody N C, Weng F. Microwave emission and scattering from deserts: Theory compared with satellite measurements[J]. IEEE Transactions on Geoscience Remote Sensing, 2008, 46(2): 361-375.
[23]Rosenkranz P W. Absorption of microwave by atmospheric gases in Atmospheric Remote Sensing by Microwave Radiometry[M]. New York: Wiley press, 1993: 84-90.
[24]Pellerin T, Wigneron J P, Calvet J C, et al. Global soil moisture retrieval from a synthetic L-band brightness temperature data set[J]. J Geophys Res, 2003, 108: doi:1.1029/2002JD003086.
[25]Rodell M, Coauthors. The global land data assimilation system[J]. Bull Amer Meteor Soc, 2004, 85: 381-394.
[26]Matzler C. Microwave permittivity of dry sand[J]. IEEE Transactions on Geoscience Remote Sensing, 1998, 36(1): 317-319.
[27]Noorallah G Juma. The Pedosphere and Its Dynamics: A Systems Approach to Soil Science[C]. Vol 1: Introduction to Soil Science and Soil Resources, Salman Productions Inc. Edmonton, Alberta, Canada. 2001.
[28]Allison L J. Geologic applications of nimbus radiation data in the Middle East[R]. NASA, Washington, DC, NASA Tech. Note, NASA, TN D-8469, 1977.
[29]杨文, 季国良. 干旱地区大气与地表特征对辐射加热场的影响[J]. 高原气象, 1994, 13(3): 266-273.
[30]钱亦兵, 吴兆宁, 石井武政, 等. 塔克拉玛干沙漠沙物质成分特征及其来源[J]. 中国沙漠, 1993, 13(4): 32-38.
[31]穆桂金. 塔克拉玛干沙漠的形成时代及发展过程[J]. 干旱区地理, 1994, 17(3): 1-9.
