| A study on environmental aridity over northern and southern to Qinling Mountains under climate warming |
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| 作者姓名： | YAN Jun-ping~ LIU Yan-sui~ |
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| 作者单位： | 1. College of Tourism and Environment，Shaanxi Normal University，Xi'an 710062，China; 2. Institute of Geographic Sciences and Natural Resources Research，CAS，Beijing 100101，China |
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| 基金项目： | Knowledge Innovation Project of Chinese Academy of Sciences, KZCX2-310-05，National Natural Science Foundation of China, No.4007 |
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| 摘 要： | 1 Introduction With progressive researches on global climate change, an integrated study of various disciplines tends to be inevitable. Mr. Moore III, chairman of IGBP, holds that the key to integration is to synthesize scientific findings so as to get new ideas and to chance cognition up to a new high1]. Micro-study, rather than macro-study focuses on regional change2-5]. To strengthen the global perspective in the study, "to research on typical regions and to deepen the regional divide…
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| 收稿时间： | 2000-11-05 |
A study on environmental aridity over northern and southern to Qinling Mountains under climate warming |
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| YAN Jun-ping,LIU Yan-sui.A study on environmental aridity over northern and southern to Qinling Mountains under climate warming[J].Journal of Geographical Sciences,2001,11(2):193-201. |
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| Authors: | Yan Jun-ping Liu Yan-sui |
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| Institution: | 1. College of Tourism and Environment, Shaanxi Normal University,
2. Institute of Geographic Sciences and Natural Resources Research, CAS, |
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| Abstract: | Based on the data up to 1999 from hydroclimatological departments, this paper analyzes the climatic divide implications of the Qinling Mountains in regional response to the process of climate warming, due to which the grades of dryness/wetness (GDW) in 100 years show that the northern region has entered a drought period, while the southern is a humid period. In a course of ten years, the D-value of annual average air temperature over southern Shaanxi (the Hanjiang Valley) and the Central Shaanxi Plain (the Guanzhong Plain) has narrowed, i.e., the former with a slight change and the latter with rapid increase in temperature. Both regions were arid with the decrease in precipitation D-value, namely the plain became warmer while the south was drier. The Qinling Mountains play a pronounced role in the climatic divide. The runoff coefficient (RC) of the Weihe River decreases synchronously with that of the Hanjiang due to climate warming. The RC of Weihe dropped from 0.2 in the 1950s to less than 0.1 in the 1990s. The Weihe Valley (the Guanzhong Plain) is practically an arid area due to shortage of water. The successive 0.5, 1.0 oC temperature anomaly over China marks, perhaps, the important transition period in which the environment becomes more vulnerable than before.The study shows the obvious trend of environmental aridity, which is of help to the understanding of regional response to global climate change. |
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| Keywords: | climate change aridity Qinling Mountains |
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