Temporal and spatial variation of atmospheric water vapor in the Taklimakan Desert and its surrounding areas
ABSTRACT The study of the temporal and spatial variation of atmospheric water vapor has the important significance to show the response
to climate change in the Taklimakan Desert. The series of monthly atmospheric water vapor from 1961 to 1998 are reconstructed
using the observation data including the precipitation, ground water vapor pressure data over the period of 1961 to 2006 from
27 observation stations in its surrounding areas and meteorological data from the Tazhong station during 1999–2006. Then the
relationship between atmospheric water vapor and ground vapor pressure is calculated and validated using the observation data
for the period of 1976 to 2006 from 5 sounding stations (Hotan, Kuqa, Ruoqiang, Kashgar, and Minfeng). The temporal and spatial
variation of atmospheric water vapor in the Taklimakan Desert and its surrounding areas is studied and then its distribution
is generated. Results show that high value zone of atmospheric water vapor is mainly distributed in the northern Taklimakan
Desert and the oasis-marginal belt of western desert and the value ranges from 14 to 15 mm. The low value center of atmospheric
water vapor is in the hinterland of the desert and the value is only 7–8 mm. The annual variations of atmospheric water vapor
show generally the increasing trend. However, the variation of atmospheric water vapor in the surrounding areas and the hinterland
of the desert is insignificant during 1961–1986. The atmospheric water vapor changes abruptly after 1986 and increases clearly
in the two regions. The variation trend accords with that of the precipitation’s increasing significantly in southern Xinjiang
for the recent 50 years. There is great error between the NCEP/NCAR reanalysis data of atmospheric water vapor and real data
in the Taklimakan Desert.
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ABSTRACT: A Global Positioning System (GPS) receiver can generally track 5–7 rays from GPS satellites at any moment, and water vapor along these ray paths (slant-path water vapor, SWV) may be retrieved using the methods developed in recent years. This paper suggests two new parameters—absolute vertical SWV (VSWV) and relative VSWV derived from SWV, and their temporal and spatial figures can reflect the heterogeneous distribution and variation of water vapor field. This approach has been applied to the weather diagnoses in a severe storm event in Beijing during July 2004, and it is concluded that the temporal and spatial figures of absolute VSWV and relative VSWV can be useful in monitoring the evolution of water vapor field and be potential in better understanding the precipitation process.Science in China Series D Earth Sciences 01/2007; 50(2). · 1.59 Impact Factor
- The primary experimentation of integrated water vapor using by ground-based GPS technique (in Chinese)..
- Analysis of precipitable water vapor source distribution and its seasonal variation characteristics over Tibetan Plateau and its surroundings (in Chinese)..