Article

Temporal and spatial variation of atmospheric water vapor in the Taklimakan Desert and its surrounding areas

Chinese Science Bulletin (Impact Factor: 1.37). 01/2008; 53:71-78. DOI: 10.1007/s11434-008-6007-2

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.

0 Bookmarks
 · 
167 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The Tarim Basin, in northwestern China, is the largest continental basin in the world, and hosts desert landscapes as well as extensive oasis agriculture. Many horticultural products come from this basin. However, since the 1950s, frequent river flow interruptions have occurred in the lower reaches of the Tarim River. Thus, the natural ecology of the basin has undergone significant changes because of recent human economic and social activities. In particular, water resource development and utilization along with climate changes have had a significant impact on the area. To prevent further deterioration of the environment, the Central Government implemented a water conveyance project in 2000. Based on this project, Chinese scientists, together with those from overseas, have conducted extensive research on the historical evolution of the area, and the physiological and ecological responses of the natural vegetation around the Tarim Desert Highway. Progress has been made in the areas of environmental protection and ecological conservation. KeywordsTarim Basin-historical evolution-vegetation recovery-Tarim Desert Highway-ecological water conveyance
    Chinese Science Bulletin 01/2010; 55(36):4097-4103. · 1.37 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Up to now, all analysis of the distribution of water vapor over the Taklimakan desert area only depends on limited ground measurements and radio soundings setting mostly on the outer margin area. This paper establishes an approach to retrieve the water vapor over the desert at high temporal and spatial resolutions by the use of FY2C geostationary satellite split-window channels in cooperation with ground-based GPS water vapor measurement. Results show that the water vapor distribution over the Taklimakan desert is affected highly by topography and surface properties. The outer margin area has generally more water vapor than the inner area. Over the outer margin area, the western part has more water vapor than the eastern part, and the northern part has more than the southern part. The driest area lies to the south of Tazhong, east of Hotan River, and extended to the south boundary of the desert. Similar to elsewhere, water vapor over the desert area shows diurnal, monthly, seasonal and annual variations even at the driest inner area of the desert. In summer, the water vapor is transported from west to east over a long distance along the westerlies at a height between 700–400 hPa and with the average speed of 50 km h−1.
    Science China Earth Science 01/2012; · 1.34 Impact Factor