Atmospheric water vapor climatological characteristics over Indo-China region based on BeiDou/GNSS and relationships with precipitation

doi:10.11947/j.AGCS.2020.20200339

Abstract

Abstract: The historical BeiDou/GNSS observations from 2006 to 2016 at stations over Indo-China region were reprocessed with consistent models and strategies. Precipitable water vapor (PWV) products were then retrieved, and were used to study the atmospheric water vapor climatological characteristics over Indo-China region, including the average PWV, PWV annual amplitudes and PWV semi-annual amplitudes. The climatological characteristics of the PWV are found to be mainly affected by the station latitude, station altitude and the monsoon system in this region. Relationship between PWV and precipitation were explored in the study region. A clear correlation is found and the correlation coefficient (R) generally decreases with the station latitude where R can reach 0.8 in Yunnan Province while decrease to about 0.2 in the southern Thailand region close to the equator. In addition, PWV and precipitation monthly anomaly also show weak positive correlation in this region with R of about 0.2~0.4.

Key words: Indo-China region, BeiDou/GNSS, precipitable water vapor, precipitation, climate change

CLC Number:

P227

SHI Chuang, ZHANG Weixing, CAO Yunchang, LOU Yidong, LIANG Hong, FAN Lei, C SATIRAPOD, C TRAKOLKUL. Atmospheric water vapor climatological characteristics over Indo-China region based on BeiDou/GNSS and relationships with precipitation[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(9): 1112-1119.

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