科学边缘人罗德海教授分享 http://blog.sciencenet.cn/u/ldh 中国科学院大气物理研究所研究员,四川人.研究方向:气候动力学,大气动力学

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老外以中国科研单位发表文章!

已有 6160 次阅读 2010-10-5 21:11 |个人分类:科研心得|系统分类:科研笔记| 老外, 发文章

今天我上AMS网站上去查AMS接受而待发表文章的目录,发现有两个老外以中国气象局国家气候中心的名义在J. Climate上发了一篇论文。这篇文章主要研究中国华南珠江流域极端降水事件的变化趋势。在大气科学领域,老外以中国科研单位发表文章好像是第一次,不知道这两个老外是专家还是学生?觉得好奇,所以我就把他们贴出来了。

 

Trends in Precipitation Extremes in the Zhujiang River Basin, South China
Marco Gemmer

National Climate Center of the China Meteorological Administration, Beijing, China

Thomas Fischer

National Climate Center of the China Meteorological Administration

Tong Jiang

National Climate Center of the China Meteorological Administration and Nanjing University of Information Science and Technology

Buda Su

National Climate Center of the China Meteorological Administration

Lü Liu Liu

National Climate Center of the China Meteorological Administration

 

Abstract

Spatial and temporal characteristics of precipitation trends in the Zhujiang River basin, South China, are analyzed. Non-parametric trend tests are applied to daily precipitation data from 192 weather stations between 1961–2007 for the following indices: annual, monthly, and daily precipitation; annual and monthly number of rain days and precipitation intensity; annual and monthly maximum precipitation; 5-day maximum precipitation, number of rainstorms >50 mm d−1, and peak over threshold (90th, 95th, and 99th percentile).

The results show that few stations experienced trends in the precipitation indices on an annual basis. On a monthly basis, significant positive and negative trends above 90% confidence level appear in all months except December. Trends in the indices of monthly precipitation, rain intensity, rain days, and monthly maximum precipitation show very similar characteristics. They experience the most distinct negative (positive) trends in October (January). A change of the mean wind direction by 50° from East-South-East to East-North-East explains the downward trend in precipitation in October. Dry October months (months with low precipitation indices) can be observed when the mean wind direction is East-North-East (arid) instead of the prevailing mean wind direction East-South-East (moist). The former is typical for the East Asian Winter Monsoon (EAWM). Nearly 90% of the driest October months can be explained by wind directions typical for the EAWM. The upward trend in precipitation indices in January cannot be explained by changes in large scale circulation. The analysis of the precipitation indices delivers more detailed information on observed changes than other studies in the same area. This can be attributed to the higher station density and quality of daily data, and the focus on monthly trends in the current study.

Corresponding author address: Dr. Marco Gemmer, National Climate Center, 46, Zhongguancun Nandajie, Haidian 100081, Beijing, PR China E-mail: , Phone: 0086-10-5889 5881
 


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