Mr. Wang Hao Profile

Wang Hao

at Nanjing Univ of Information Science & Technology

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Proceedings Article | 8 December 2011 Paper

Analysis and research on precipitable water vapor in autumn of Chengdu region

Hao Wang, Ming Wei, Dan Wang, Shenghui Zhou, Qingfeng Zeng

Proceedings Volume 8002, 80021E (2011) https://doi.org/10.1117/12.902018

KEYWORDS: Global Positioning System, Meteorology, Analytical research, Climatology, Data modeling, Composites, Climate change, Atmospheric modeling, Environmental sensing, Temporal resolution

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The rainfall process in autumn of Chengdu region has significant regional characteristics. Since GPS detection technology has characteristics such as all-weather, high accuracy, high spatial and temporal resolution and low cost, its tracking and monitoring technique on water vapor has achieved rapid developments in recent years. In this paper, it makes use of GPS-PWV data from 6 foundation GPS observation stations of GPS observation network in Chengdu region from September 2007 to November 2007 and from September 2008 to November 2008 these two falls which have 30min intervals. Fast Fourier transform was used to obtain the variation principle that in autumn the rainfalls change in the time period and there also has one quarter season within the fall, which is around 22 days or so. After the analysis, it finds that PWV drastically decreases at late October which is closely correlated to the local climate changing cycle. After we conduct composite analysis on diurnal cycle by integrating PWV with other meteorological elements we can find: There is a negative correlation between PWV and temperature; there is more obvious positive correlation between humidity and PWV. GPS precipitable water vapor may increase or maintain the characteristics within high value area from midnight to early morning which can bitterly correspond with the actual rainfall process of this region.

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