Plateau Meteorology

Plateau Meteorology >

2019 , Vol. 38 >Issue 1: 78 - 87

DOI: https://doi.org/10.7522/j.issn.1000-0534.2018.00073

Comparative Analysis of Multi-Source Water Vapor Data in Three River Source and Nearby Areas

  • MA Xueqian ,
  • ZHANG Xiaojun ,
  • MA Yuyan ,
  • CAI Miao ,
  • HAN Huibang ,
  • KANG Xiaoyan
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  • Office of WeatherModification in Qinghai Province, Xining 810000, Qinghai, China;Weather modification center of China Meteorological Bureau, Beijing 100000, China

Received date: 2018-01-03

  Online published: 2019-02-28

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Abstract

The 35-channel microwave radiometer, global navigation satellite system meteorological observations (GNSS/Met), L-band sounding and National Center for Environmental Prediction (NCEP) reanalysis data constructed by enhancement precipitation project of Three Rivers Source were used to continuously monitor and calculated the precipitation water vapor (PWV) in this paper. The differences and influencing factors of multi-source data were compared, grasped and identified the applicability of multi-source data in Three River Source and nearby areas. The results show that GNSS/Met PWV is basically consistent with the reference value, which is not affected by temperature, precipitation, seasons and regions, and the total deviation is 1.45 mm. It can completely represent the water vapor characteristics of Three River Source and nearby areas. The general trend of NCEP PWV is consistent with the reference value, its value is obviously small, only 69% of the reference value, and with the larger deviation of precipitation increases. Temperature, region and season have a significant impact on its value. PWV of microwave radiometer can represent the water vapor characteristics of no or weak precipitation conditions, the value is significantly larger, and affected by the temperature, liquid water content and other factors, the data applicability need a lot of neural network training. The analysis of the ten-day PWV in Three River Source and nearby areas shows that there is little difference in the core area of Three River Source, and it is a trough-type distribution from east to west; the distribution characteristics of nearby areas are very different, with the highest in the east and the lowest in the west. the characteristics closely relate with geographic location, topography, and annual weather processes. These monitoring data analysis and comparative verification have played a fundamental role in the accurate quantitative assessment of cloud water resources in Three River Source and nearby areas. and also played a key role in protecting the ecological environment of the plateau ecology by enhancement precipitation.

Key words： Three River Source a; vapor; special observation; contrast test

Cite this article

MA Xueqian , ZHANG Xiaojun , MA Yuyan , CAI Miao , HAN Huibang , KANG Xiaoyan . Comparative Analysis of Multi-Source Water Vapor Data in Three River Source and Nearby Areas[J]. Plateau Meteorology, 2019 , 38(1) : 78 -87 . DOI: 10.7522/j.issn.1000-0534.2018.00073

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