Comparisons of PBL heights derived from CALIPSO and ECMWF reanalysis data over China
Comparisons of PBL heights derived from CALIPSO and ECMWF reanalysis data over China
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CALIPSO和ECMWF再分析数据得出的中国PBL高度比较
DOI：
10.1016/j.jqsrt.2014.10.011
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发表时间：
2015-03-01
影响因子：
2.3
通讯作者：
Zhang, Beidou
中科院分区：
文献类型：
--
作者：
Liu, Jingjing;Huang, Jianping;Zhang, Beidou
利用云气溶胶激光雷达和红外探路者卫星观测（CALIPSO）衰减后向散射观测的最大标准差法估算了行星边界层高度。CALIPSO与地面激光雷达的相关性为0.73，只有在云在剖面中所占比例小于5%的情况下，才能与SACOL的地面激光雷达结果进行比较。我们给出了中国4年中午PBL高度的季节平均模式，并利用它们来评估欧洲中期天气预报中心（ECMWF）的PBL深度检索，为边界层研究提供信息，并提高我们对PBL高度如何介导地表和大气之间能量和污染物交换的理解。边界层高度最小的地区出现在塔里木盆地和东北地区。对比CALIPSO和ECMWF在不同土地覆盖条件下的PBL， CALIPSO后向散射气候学估算的PBL深度比ECMWF数据估算的PBL深度大。而ECMWF的PBL高度在春夏季主要集中在草地和裸地表面。(c) 2014 Elsevier Ltd.版权所有。
Planetary boundary layer (PBL) height was estimated using the maximum standard deviation method for Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) attenuated backscatter observations. It was only retrieved under conditions where the clouds accounted for less than 5% in a profile, where it could be compared with ground lidar results at SACOL The correlation between CALIPSO and the ground lidar was 0.73. We present the seasonal mean patterns of 4-year mid-day PBL heights over China and use them to evaluate the European Centre for Medium-Range Weather Forecasts (ECMWF) PBL depth retrievals, inform boundary layer studies, and improve our understanding of how PBL height mediates exchanges of energy and pollutants between the surface and the atmosphere. We found that the largest PBL heights occurred over the Tibetan Plateau and coastal areas. The smallest PBL heights appeared in the Tarim Basin and northeast of China during local winter. A comparison of CALIPSO and ECMWF PBL under different land-cover conditions showed that the PBL depth estimated by the CALIPSO backscatter climatology is larger over ocean and forest surface than that estimated from ECMWF data. However, the PBL heights of ECMWF that were larger than those of CALIPSO were mainly concentrated over grassland and bare land surface in spring and summer. (c) 2014 Elsevier Ltd. All rights reserved.