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

Abstract

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

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). Analysis of Observational Difference for Relative Humidity between AWS and Manual Observation in Linxia[J]. Chinese Journal of Agrometeorology.

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

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