| 甘肃中西部近年沙尘天气气候特征及典型个例诊断分析 |
| |
| 引用本文： | 任余龙,寿绍文.甘肃中西部近年沙尘天气气候特征及典型个例诊断分析[J].南京气象学院学报,2007,30(2):266-273. |
| |
| 作者姓名： | 任余龙 寿绍文 |
| |
| 作者单位： | 1. 南京信息工程大学,大气科学学院,江苏,南京,210044;临夏州气象局,甘肃,临夏,731100;中国气象局,兰州干旱气象研究所,甘肃,兰州,730020
2. 南京信息工程大学,大气科学学院,江苏,南京,210044 |
| |
| 基金项目： | 国家自然科学基金
,
江苏省气象局科研项目
,
江苏省气象灾害重点实验室基金
,
国家重点基础研究发展计划(973计划)
,
江苏省自然科学基金 |
| |
| 摘 要： | 从极涡位置、土壤湿度、地温等探讨了甘肃中西部地区沙尘日差别的原因,指出冷空气是产生沙尘天气的首要因素,高温少雨、土壤干层厚是发生沙尘天气的有利气候背景,并用合成分析法得出西北路径型和偏西路径型两种类型沙尘天气的平均流场;"20010408"强沙尘暴过程实况资料对条件对称不稳定度(CSI)和锋面次级环流进行诊断分析,结果表明:强沙尘暴发生前存在深厚的条件对称不稳定,锋面次级环流和沙尘暴有较好的时空对应关系.
|
| 关 键 词： | 沙尘路径 合成分析 强沙尘暴 CSI 锋面次级环流 甘肃 中西部 沙尘天气 气候特征 诊断分析 Gansu Province Region West Middle Dust Storms Severe Diagnosis Recent Sand 对应关系 时空 强沙尘暴 条件对称不稳定 存在 结果 |
| 文章编号： | 1000-2022（2007）02-0266-08 |
| 修稿时间： | 2005-12-212006-06-26 |
Climatological Characteristics of Sand Dust Storm in Recent Years and Diagnosis of a Severe Dust Storms in the Middle and West Region of Gansu Province |
| |
| REN Yu-long,SHOU Shao-wen.Climatological Characteristics of Sand Dust Storm in Recent Years and Diagnosis of a Severe Dust Storms in the Middle and West Region of Gansu Province[J].Journal of Nanjing Institute of Meteorology,2007,30(2):266-273. |
| |
| Authors: | REN Yu-long SHOU Shao-wen |
| |
| Affiliation: | 1. School of Atmospheric Sciences, NUIST, Nanjing 210044, China ;2. Meteorlogical Bureau of Linxia, Linxia 731100, China; 3. Institute of Arid Meteorology,CMA,Lanzhou 730020,China |
| |
| Abstract: | In the years 2002 and 2003,the frequency of the sandstorm in the middle and west region of Gansu decreased and the intensity weakened.In order to find the Climatological reason for the change,the arctic vortex,temperature and the moisture of surface layer soil were analyzed.According to the source of sanddust,the transfer paths of sanddust can be devided into two type:the northwest and west path.The composite analysis is used to find their mean circulation,and in order to find the relation between severe sanddust storm and physical quantities,such as Q-vector,CSI(Conditional Symmetric Instability) and frontal secondary circulation,a severe sandstorm "20010408" was diagnosed based on the NECP data.And the result show that conditional symmetric instability layer was very thick before the happening of the sand storm and the frontal secondary circulation had a close relation with the sand storm. |
| |
| Keywords: | sandstorm transfer path composite synthetic analysis serve sandstorm conditional symmetric instability frontal secondary circulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
