| 西北地区水汽输送特征及其年际、年代际变化 |
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| 引用本文： | 张雪梅,江志红,兰博文.西北地区水汽输送特征及其年际、年代际变化[J].灾害学,2010,25(4). |
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| 作者姓名： | 张雪梅 江志红 兰博文 |
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| 作者单位： | 哈尔滨市气象局;南京信息工程大学/气象灾害省部共建教育部重点实验室; |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划项目 |
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| 摘 要： | 利用1950-2002年NCAR/NCEP再分析逐日平均资料,计算了我国西北地区格点整层水汽输送通量,分析了西北地区水汽输送在推进过程中逐候的气候特征及其年际、年代际变化特征。研究发现:北疆和河西走廊常年为偏西风水汽输送,渭水流域中上游、陕西和高原东北侧偏西风和西南风水汽输送交替出现,高原和南疆的水汽输送常年都很弱;西南风水汽输送主要集中在6-10月,8月达到38°N附近的北界;近50年西北地区水汽输送在逐渐减弱,大值区开始的时间在逐渐拖后,结束的时间变化不大,春季的水汽输送明显减少。
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| 关 键 词： | 西北地区 水汽输送 候 特征线 |
Characteristics of Water Vapor Transportation over Northwest China and Its Inter-annual and Inter-decadal Variation |
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| Zhang Xuemei,Jiang Zhihong,Lan Bowen.Characteristics of Water Vapor Transportation over Northwest China and Its Inter-annual and Inter-decadal Variation[J].Journal of Catastrophology,2010,25(4). |
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| Authors: | Zhang Xuemei Jiang Zhihong Lan Bowen |
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| Institution: | Zhang Xuemei1,2,Jiang Zhihong2 and Lan Bowen1 ( 1. Harbin Meteorlogical Bureau,Harbin 150080,China,2. Nanjing University of Information Science & Technology,Key Laboratory of Meteorological Disaster of Ministry of Education,Nanjing 210044,China) |
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| Abstract: | Daily averaged NCAR/NCEP reanalysis data is used to study the characteristics of pentad water vapor transportation and its inter-annual and inter-decadal variation over northwest China by calculating the whole level water vapor transportation flux. The result shows that in north Xingjiang and Hexi Corridor there exist westerly wind water vapor transportation all year around,in Weishui drainage area and Shaanxi and eastern Tibetan Plateau west and southwest wind water vapor transportation appears alternately... |
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| Keywords: | northwest China vapor transportation pentad characteristic line |
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