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Atmospheric Science Letters Volume 20 ,Issue 6 ,2019-05-02
Scale effects of topographic ruggedness on precipitation over Qinghai‐Tibet Plateau
RESEARCH ARTICLES
Ning Lu 1 , 2
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DOI:10.1002/asl.904
Received 2018-07-28, accepted for publication 2019-04-17, Published 2019-04-17
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摘要

Abstract Due to the complex topography in mountainous areas, the pattern of precipitation is impacted by the topographic ruggedness (TR) that is characterized from Digital Elevation Model and thus scale‐dependent. Scale effects on the precipitation–TR relationship have not been well known in the Qinghai‐Tibet Plateau. Based on station measurements of precipitation in the domain, this study uses the quantile regression method to investigate the response of precipitation quantiles in summer and winter to the TR changes at different spatial scales. It is found that the scale variations impede the validity analysis of precipitation–TR relations. Neither too large (>100 km) or too small (<1 km) scales are suitable for exploring summer precipitation, and the scales are better less than 30 km for high winter precipitation. The analyses address that the precipitation–TR relations depend on appropriate spatial scales, which is important for statistical downscaling and model projection of precipitation in the Qinghai‐Tibet Plateau.

关键词

topographic ruggedness;scale effects;Qinghai‐Tibet Plateau;precipitation

授权许可

© 2019 Royal Meteorological Society

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通讯作者

Ning Lu.State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China.lvn@lreis.ac.cn

推荐引用方式

Ning Lu. Scale effects of topographic ruggedness on precipitation over Qinghai‐Tibet Plateau. Atmospheric Science Letters ,Vol.20, Issue 6(2019)

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