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| Eco-environmental Evolution in Arid Area of West China |
| PAN Xiao-ling1,2,3, MA Ying-jun3,4, GAO Wei2,3,5, QI Jia-guo2,3,6, SHI Qing-dong1,2,3, LU Hai-yan1,2,3 |
1. College of Natural Resources and Environmental Sciences, Xinjiang University, Urumqi 830046, China;
2. Key Laboratory of Desert Oasis Ecosystems, Urumqi 830046, China;
3. International Center for Desert Affairs Research for Sustainable Development in Semi-arid and Arid Lands, Urumqi 830046, China;
4. Center for Resources and Environmental Sciences, Urumqi, 830000, China;
5. Natural Resources and Ecological Research Laboratory, Colorado State University, Colorado 80521, USA;
6. Department of Geography, and Center for Global Change an d Earth Observations, Michigan State University, East Lansing, MI 48823, USA |
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Abstract The eco-environmental evolution in arid area of West China were studied at 1 0000-year, 1000-year, 100-year and 10-year timescales, based on geological data of lacustrine, eolian and glacial deposits, and by using the methods of GIS, RS and landscape ecology etc. The results showed that the climate changing patterns had gone through several complex cycles of "warm and dry" and "cold and moist" periods. Although the climate pattern varied spatially and temporally during the earlier, the mid and the late Holocene period, there was an overall tendency of becoming drier. Over the past 280~350 years, the precipitation decreased significantly and periodically. Over the past half of a century, the climate pattern over Tianshan Mountains tended to increases in both temperature and total precipitation. From the 1980s to the end of this century, the regional climate in Xinjiang region seemed to become colder and moist, accompanied by increases in green vegetation cover, total areas of forests, grasslands, and oasis. The results also indicated that increases in vegetative cover tend to have positive impacts on regional climate increases in total precipitation over some geographic areas at different spatial and temporal scales.
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Received: 23 December 2003
Published: 20 December 2004
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2004, Vol. 24 
