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Climatic Change

, Volume 100, Issue 3–4, pp 807–815 | Cite as

Intensified reduction in summertime light rainfall over mountains compared with plains in Eastern China

A letter
  • Jing Yang
  • Dao-Yi Gong
Letter

Abstract

Based on daily rainfall data from 1960 to 2007, this study investigated the difference in rainfall trends between seven mountain stations and 21 nearby plain stations in eastern China for the months June–August. The amount and frequency of light rain (≤2.5 mm/day) over the mountain areas showed a greater decreasing trend than over the surrounding plain regions. The trend of light-rainfall frequency at mountain stations is − 4.8%/decade, approximately double that at plain stations (− 2.3%/decade). The trend in light-rainfall amount at mountain stations is − 5.0%/decade, approximately three times that at plains station (− 1.4%/decade). Reduced wind speed may explain the enhanced decrease in light rainfall over mountain areas through the weakened orographic lifting. Further study is needed to determine whether the precipitation difference between mountain and plain (urban) regions is exacerbated by air pollution in East China through its indirect effects and influence on regional air stability and wind speed.

Keywords

Wind Speed Total Rainfall East Asian Summer Monsoon Surface Wind Speed Plain Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.State Key Laboratory of Earth Surface Processes and Resource Ecology (ESPRE)Beijing Normal UniversityBeijingChina

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