doi:  10.3878/j.issn.1006-9895.1512.15273
中国西北三类典型裸土下垫面地表宽波段发射率变化特征研究

A Study of Variation Characteristics of Surface Broadband Emissivity over Three Typical Bare Soil Underlying Surfaces in Northwestern China
摘要点击 1095  全文点击 209  投稿时间:2015-09-22  
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  国家自然科学基金项目41275011、41375001、41405063
中文关键词:  干旱半干旱区  野外观测试验  地表宽波段发射率  典型下垫面
英文关键词:  Arid and semi-arid area  Field observational experiment  Land surface broadband emissivity  Typical underlying surface
              
作者中文名作者英文名单位
郑志远ZHENG Zhiyuan北京师范大学地表过程与资源生态国家重点实验室, 北京 100875;北京师范大学珠海分校未来地球研究院, 珠海 519087
韦志刚WEI Zhigang北京师范大学地表过程与资源生态国家重点实验室, 北京 100875;北京师范大学珠海分校未来地球研究院, 珠海 519087
李振朝LI Zhenchao中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室, 兰州 730000
文小航WEN Xiaohang成都信息工程大学大气科学学院高原大气与环境四川省重点实验室, 成都 610225北京师范大学珠海分校未来地球研究院, 珠海 519087
陈辰CHEN Chen北京师范大学地表过程与资源生态国家重点实验室, 北京 100875;北京师范大学珠海分校未来地球研究院, 珠海 519087
引用:郑志远,韦志刚,李振朝,文小航,陈辰.2016.中国西北三类典型裸土下垫面地表宽波段发射率变化特征研究[J].大气科学,40(6):1227-1241,doi:10.3878/j.issn.1006-9895.1512.15273.
Citation:ZHENG Zhiyuan,WEI Zhigang,LI Zhenchao,WEN Xiaohang,CHEN Chen.2016.A Study of Variation Characteristics of Surface Broadband Emissivity over Three Typical Bare Soil Underlying Surfaces in Northwestern China[J].Chinese Journal of Atmospheric Sciences (in Chinese),40(6):1227-1241,doi:10.3878/j.issn.1006-9895.1512.15273.
中文摘要:
      利用2013年我国西北戈壁、沙漠和黄土塬区三类典型裸土下垫面野外观测试验资料,探究了上述地区地表向下、向上长波辐射(DLR&ULR)、地表温度(LST)和地表宽波段发射率(LSBE)的变化特征,结果表明:黄土站地表ULR和LST明显比戈壁和沙漠站偏低;戈壁宽波段发射率(GbBE)、沙漠宽波段发射率(DeBE)和黄土宽波段发射率(LoBE)具有明显的变化特征,尤其是日变化特征;观测期内GbBE、DeBE和LoBE平均值分别约为0.926±0.0452、0.916±0.0419和0.881±0.049。三站点地表宽波段发射率的数值大小和变化特征与陆面模式中所指定的参数化情况不符。地表发射率会受站点周围环境和当时气象条件等因素的影响,表层土壤湿度被认为是一个非常重要的影响因子,将来的野外观测试验中需加强相关影响要素的观测与分析。
Abstract:
      A field observational experiment on ground surface downward longwave radiation (DLR),upward longwave radiation (ULR),and land surface temperature (LST) was conducted at three man-made sites at Gobi,desert,and bare loess zones in 2013 in Gansu Province.In the present study,variation characteristics of surface longwave radiation (LR),LST and surface broadband emissivity over Gobi (GbBE),desert (DeBE),and loess (LoBE) underlying surfaces are analyzed based on the observations collected in the experiment.Results show that the ULR and LST at the Loess site are lower than that at Gobi and desert sites.Surface broadband emissivity at each site has obvious variation characteristics,especially the diurnal cycle feature.Daily averages of surface broadband emissivity at GbBE,DeBE,and LoBE are approximately 0.926±0.0452,0.916±0.0419,and 0.881±0.049,respectively.The values and variation characteristics of observed land surface emissivity are not consistent with that in land surface models.Land surface emissivity can be affected by environmental factors and weather condition.Land surface soil moisture is a significant factor influencing surface emissivity in arid and semi-arid region.More relatively influential factors should be measured and analyzed in the future in field observational experiments.
主办单位:中国科学院大气物理研究所 单位地址:北京市9804信箱
联系电话: 010-82995051,010-82995052传真:010-82995052 邮编:100029 Email:dqkx@mail.iap.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09060247号