高原气象

高原气象 >

2018 , Vol. 37 >Issue 2: 432 - 442

DOI: https://doi.org/10.7522/j.issn.1000-0534.2017.00094

论文

大气红外探测器(AIRS)温、湿廓线反演产品及边界层高度在黄土高原的验证

  • 程海艳 ,
  • 余晔 ,
  • 陈晋北 ,
  • 姚惇 ,
  • 解晋 ,
  • 李江林
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  • 中国科学院西北生态环境资源研究院/寒旱区陆面过程与气候变化重点实验室, 甘肃 兰州 730000;中国科学院大学, 北京 100049;中国科学院平凉陆面过程与灾害天气观测研究站, 甘肃 平凉 744015;平凉市气象局, 甘肃 平凉 744000

收稿日期: 2017-08-25

  网络出版日期: 2018-04-28

基金资助

国家自然科学基金项目（41575014，41175009）

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Validation of AIRS Retrieved Temperature and Moisture Products and Its Applicability for Boundary Layer Height Estimation in Loess Plateau

  • CHENG Haiyan ,
  • YU Ye ,
  • CHEN Jinbei ,
  • YAO Dun ,
  • XIE Jin ,
  • LI Jianglin
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  • Key Laboratory of Land Surface Process & Climate Change in Cold & Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;University of Chinese Academy of Sciences, Beijing 100049, China;Pingliang Land Surface Process & Severe Weather Research Station, Chinese Academy of Sciences, Pingliang 744015, Gansu, China;PingliangMeteorological Bureau, Pingliang 744000, Gansu, China

Received date: 2017-08-25

  Online published: 2018-04-28

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摘要

利用黄土高原地区加强观测期探空资料和大气红外探测器（Atmospheric Infrared Sounder，AIRS）反演的温度、相对湿度廓线资料，评估了AIRS反演产品在黄土高原的适用性，以及利用AIRS温度廓线计算边界层高度的可行性。结果表明，各种边界层高度计算方法相关性显著，平均高度差异一般不超过200 m；Richardson数临界值的选取对确定边界层高度的影响不大。AIRS反演的大气温度和相对湿度均能很好地反映环境温湿的变化；温度平均偏差在±1 K以内，均方根误差一般不超过2 K；AIRS反演的地面气温误差相对较大，平均偏差和均方根误差分别为-1.68 K和3.32 K，并且会影响边界层高度的确定；AIRS相对湿度平均偏差在±10%以内，均方根误差不超过20%。利用Parcel法估计的边界层高度结果显示，根据AIRS反演的温度廓线确定的AIRS边界层高度低于利用探空观测资料确定的边界层高度，但能较好地再现边界层高度的变化，在没有探空数据时，可以用AIRS反演的温度廓线确定边界层高度。

关键词： 黄土高原; 边界层高度; AIRS; 温湿廓线

本文引用格式

程海艳 , 余晔 , 陈晋北 , 姚惇 , 解晋 , 李江林 . 大气红外探测器(AIRS)温、湿廓线反演产品及边界层高度在黄土高原的验证[J]. 高原气象, 2018 , 37(2) : 432 -442 . DOI: 10.7522/j.issn.1000-0534.2017.00094

Abstract

Planetary boundary layer height (PBLH) plays an important role in turbulent mixing, convective activity, cloud formation, atmospheric pollutant diffusion and cloud/aerosol crimping. It is also the basic parameter for the study of atmospheric boundary layer, as well as important parameter for weather, climate and air quality modeling. Currently, radiosonde is the most widely used method for obtaining the planetary boundary layer temperature and humidity profile. However, most sites only launch the radiosonde twice a day (usually at 08:00 and 20:00, Beijing time), and these sites are inhomogeneously distributed. It is still very difficult to obtain the information on vertical profiles of temperature, humidity and planetary boundary layer height in areas where observations are sparse. In this study, the applicability of the temperature and relative humidity profile from the Atmospheric Infrared Sounder (AIRS) which have a global coverage and the feasibility of using AIRS temperature profile to determine the planetary boundary layer height over the Loess Plateau area were evaluated using radiosonde observation data obtained during the intensive observation periods in summer of 2012-2016. The results indicated that the correlation among the planetary boundary layer heights determined by six different methods are significant. The height differences among various methods are generally not more than 200 m, and the selection of critical Richardson number value has little influence on the determined planetary boundary layer height. On the other hand, AIRS retrieval products can well reflect the vertical variations in atmospheric temperature and moisture, with mean bias and root mean square error less than 1 K and 2 K for air temperature and they are not more than 10% and 20% for relative humidity, respectively. However, the error of surface air temperature between AIRS and radiosonde observation is relatively large, with the mean bias and the root mean square error being -1.68 K and 3.32 K respectively, which could affect the determination of the planetary boundary layer height. The comparison of planetary boundary layer height determined by using temperature profiles from the AIRS with that determined by using radiosonde through Parcel method shows that although the planetary boundary layer heights determined by AIRS temperature profiles are lower than that determined by radiosonde observations, it can reproduce the change of the planetary boundary layer height well. AIRS retrieval temperature profiles can be used to estimate planetary boundary layer height in the study area when radiosonde data are not available. The study will help enhancing the understanding of the planetary boundary layer over the Loess Plateau and provide modelers with information on planetary boundary layer characteristics that can be used to improve numerical model simulations.

Key words： Loess Plateau; boundary layer heigh; AIRS; temperature and mois

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