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Climatic variations within the dry valleys in southwestern China and the influences of artificial reservoirs
Stockholm University, Faculty of Science, Department of Physical Geography. Beijing Normal University, China.
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Number of Authors: 52019 (English)In: Climatic Change, ISSN 0165-0009, E-ISSN 1573-1480, Vol. 155, no 1, p. 111-125Article in journal (Refereed) Published
Abstract [en]

Climatic variation within a typical dry-valley area located in the southern Hengduan Mountains of China is studied, and the potential regional climate influences of large reservoirs in the area are discussed. Six meteorological stations near a reservoir are identified and classified into two categories (dry and non-dry valleys) to compare their level of climate change. Temperatures tended to increase since 1990 with a precipitation shift toward the dry season in both dry and non-dry valleys. Wavelet analysis shows that temperature and precipitation have significant variation with periods of 3.6 and 16.5 years, respectively. The standardized precipitation evapotranspiration index (SPEI) shows that dry valleys have multiple drought trends. Temperature in non-dry valleys changed more than that in dry valleys, but the variations of other indices in the two categories of valleys are not statistically different. The climatic variation of one station is in accordance with the reservoir filling, which is related to the orientation of the reservoir in the prevailing wind direction especially during summer. This study provides a profile of the climate change of dry valleys and documents the influence of large artificial reservoirs on regional climate.

Place, publisher, year, edition, pages
2019. Vol. 155, no 1, p. 111-125
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-170814DOI: 10.1007/s10584-019-02457-yISI: 000473162200007OAI: oai:DiVA.org:su-170814DiVA, id: diva2:1339568
Available from: 2019-07-30 Created: 2019-07-30 Last updated: 2019-07-30Bibliographically approved

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