摘要
利用1948-2003年的逐日600 hPa 2.5°×2.5°NCEP/NCAR再分析资料和1957-2003年中国北方地区春季沙尘暴日数资料,计算了反映青藏高原地区季风特征的高度场指数序列,分析了青藏高原高度场指数的年代际变化。结果表明:近56年来,高原季风指数总体呈现冬季风减弱、夏季风增强的变化趋势;高原季风的变化与我国北方地区春季沙尘暴的多寡密切相关,高原冬季风偏强的年份,我国北方地区春季沙尘暴偏多,而高原冬季风偏弱的年份,我国北方地区春季沙尘暴偏少。
Based on daily reanalysis data of 600 hPa and 2.5°- 2.5° NCEP/NCAR for period from 1948 to 2003 and the data of spring＇s duststorm days in northren China during 1957 - 2003, the height field index series indicating monsoon characters in Qing-Xizang plateau was calculated and the deeadal change of the index was analyzed. In recent 56 years, the change of plateau monsoon index appears with decrease in winter and increase in summer, and the change related closely to quantity of spring＇s duststorm in northren China. In the years with plateau winter monsoon on the strong side, there are more spring＇s duststorms in northren China, and vice versa.
出处
《自然灾害学报》
CSCD
北大核心
2008年第3期112-116,共5页
Journal of Natural Disasters
基金
国家自然科学基金(40375031)资助
关键词
青藏高原
季风指数
中国北方
沙尘暴
相关分析
Qinghai-Xizang plateau monsoon index
northern China
duststorm
correlations analysis
