大孔径闪烁仪研究区域地表通量的进展

doi:10.11867/j.issn.1001-8166.2005.09.0932

地球科学进展 ›› 2005, Vol. 20 ›› Issue (9): 932 -939. doi: 10.11867/j.issn.1001-8166.2005.09.0932

大孔径闪烁仪研究区域地表通量的进展

卢俐 ¹，刘绍民 ¹，孙敏章 ²，王介民 ³

1.北京师范大学国家遥感科学重点实验室,地理学与遥感科学学院，北京 100875；
2.中国科学院沈阳应用生态研究所，辽宁沈阳 110016；
3.中国科学院寒区旱区环境与工程研究所,甘肃兰州 730000

收稿日期:2004-12-14 修回日期:2005-06-09 出版日期:2005-09-25
通讯作者: 卢俐
基金资助:
国家自然科学基金项目“非均匀下垫面区域蒸发（散）量遥感估算机理与模型研究”（编号：40201038）；国家重点基础研究发展规划项目“被动微波遥感研究及定量遥感在水文、气象模式中的应用”(编号：G2000077908)；国家高技术研究发展计划项目“西北半干旱生态植被建设区节水综合技术体系集成与示范”（编号：2002AA2Z4271）资助.

ADVANCES IN THE STUDY OF AREAL SURFACE FLUXES WITH LARGE APERTURE SCINTILLOMETER

LU Li ¹;LIU Shaomin ¹;SUN Minzhang ²;WANG Jiemin ³

1.State key Laboratory of Remote Sensing Science,School of Geography,Beijing Normal University,Beijing 100875,China;
2.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
3.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China

Received:2004-12-14 Revised:2005-06-09 Online:2005-09-25 Published:2005-09-25

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地表湍流通量包括感热通量和潜热通量的准确测定对天气气候、农业、水文和水资源管理等意义重大。在几公里到几十公里尺度上有代表性的区域湍流通量的观测研究，特别在非均匀下垫面情况下，仍然非常困难。近年来蓬勃发展的大孔径闪烁仪（LAS）为这一问题的解决提供了全新手段。在介绍大孔径闪烁仪原理的基础上，综述了国内外利用大孔径闪烁仪开展区域地表通量观测研究的进展，包括在不同地表的LAS测量与涡动相关方法有关结果的对比，影响测量精度的关键因子分析，以及在区域地表通量遥感估算模型检验中的应用等，最后对大孔径闪烁仪的应用前景进行了展望。

关键词: 区域地表通量, 大孔径闪烁仪（LAS）, 涡动相关方法, 区域地表通量遥感估算模型

It is very important to determine land surface fluxes, including sensible heat fluxes and latent heat fluxes, for the issues involving many aspects of climate, agriculture, hydrology, and water resources management. However, it is still very difficult to observe and study areal fluxes in the scale of several to tens kilometers, especially on heterogeneous land surface. The Large Aperture Scintillometer (LAS), which is becoming popular in recent years, offers a new perspective to solve this problem. Based on light scintillation in the turbulent atmosphere,it can measure sensible heat fluxes by emitting a beam of light over a horizontal path. Then, latent heat fluxes can be derived according to surface energy balance equation. The LAS is adapted to different kinds of land surface, homogeneous or heterogeneous. Test comparisons of LAS flux measurement with the measurements by eddy correlation system show good agreement. There are some key factors, which influence the precision of areal evapotranspiration determined by LAS, such as beam height, wind speed, roughness length, zero plane displacement, Bowen ratio, and net radiation, etc.Basic principle and some algorithms are introduced. A prosperous utilization of LAS in recent years is in the validation of areal surface fluxes retrieved from remote sensing models, such as the SEBAL and SEBS. Finally, this paper discusses the development trend of applying the large aperture scintillometer in the future.

Key words: Areal surface fluxes, Large Aperture Scintillometer（LAS）, Eddy correlation method, Areal surface fluxes estimation model by remote sensing.

中图分类号:

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