中国农业气象

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临夏人工与自动气象站空气相对湿度观测差异分析

崔学祯;石登科;   

  1. 中国气象局兰州干旱气象研究所,中国气象局兰州干旱气象研究所 甘肃兰州730000,甘肃省临夏回族自治州气象局,甘肃兰州730000
  • 出版日期:2008-04-10 发布日期:2008-04-10
  • 基金资助:
    甘肃省气象局课题“临夏自动与人工观测资料对比分析及均一性研究”(2007-02)

Analysis of Observational Difference for Relative Humidity between AWS and Manual Observation in Linxia

CUI Xue-zhen1,2,SHI Deng-ke1(1.Lanzhou Arid meteorology Research Institute,China Meteorological Administration,Lanzhou 730000,China;2.Meteorological Bureau of Linxia Hui Autonomous Prefecture)   

  • Online:2008-04-10 Published:2008-04-10

摘要: 目前地面自动气象观测系统正逐步取代人工气象观测,然而两者对空气相对湿度的观测存在一定差异,直接影响着数据的应用。本文通过对临夏站2003-2004年自动气象站系统与人工观测数值的对比分析,得出:两系统观测空气相对湿度的平均差为-2.87个百分点,时空变差为-2.00~-4.27个百分点,各月最大偏差范围为-6~-15个百分点;自动站观测资料系统偏低于人工观测值。进一步分析建立了两个观测系统空气相对湿度资料的均一订正方程,经验证,明显减小了两个资料序列的偏差,效果良好。

关键词: 人工观测, 自动气象站, 空气相对湿度, 对比

Abstract: The Automatic Weather System(AWS) is taking the place of the manual observation in China's surface meteorological observation.There are differences for the relative humidity between the AWS and the manual observation in descending Qinghai-Tibet Plateau area.The differences directly influenced the application of the data.The observational data taken by the AWS and the manual observation in 2003 and 2004 were contrastively analyzed.The results showed that the average difference of two observations for relative humidity was by-2.87%,the amplitude was by-2.00%~-4.27%,and the maximum difference interval was by-6%~-15%.The value of the relative humidity by AWS was systematically lower than that by manual observation.The revising equation for two observation systems respectively was established based on the differences.It was validated that the equations reduced the deviation between AWS and manual observation.

Key words: Manual observation, Manual observation, AWS, Relative humidity, Contrast