The temporal and spatial characteristics of vapor in Dalian by using the PWV inversed by GPS during 2010-2012 were analyzed. The results showed that the data of GPS/PWV can reflect the change of vapor in atmosphere. The spatial distribution of PWV was the evenly in Dalian area. The monthly mean PWV was maximum in July or August (43 mm), the minimum in January (4 mm). The range of daily variation of PWV in Dalian was less than 0.5 mm in spring and winter, but more than 1 mm in summer and autumn. Daily variation of PWV showed single peak type in summer and autumn, but multi-peak in the other seasons. In flood season (from July to August), daily variation of PWV was significant negatively correlated with temperature, but positively correlated with relative humidity. During 06:00(Beijing Time, hereafter the same) to 15:00, temperature was increased gradually, while the atmospheric water vapor and relative humidity were decrease, and the decreased of PWV caused by water vapor transport was higher than the increased of PWV caused by evaporation. During 15:00 to 06:00 in next day, the result is opposite.
SHI Xiaolong
,
SHANG Lunyu
,
YIN Yuanyuan
,
HUANG Zhen
,
HUANG Ting
,
CHENG Hang
,
LI Hongqiang
. Variation Characteristics of Precipitable Water Vapor Inversed by GPS in Dalian[J]. Plateau Meteorology, 2014
, 33(6)
: 1648
-1653
.
DOI: 10.7522/j.issn.1000-0534.2014.00080
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