近59a柴达木盆地低温事件变化特征分析
ANALYSIS OF VARIATION CHARACTERISTICS OF LOW TEMPERATURE EVENTS IN QAIDAM BASIN IN RECENT 59 YEARS
许学莲 1文生祥 1李积芳 1曾国云 1陈丽雯 1马亮1
作者信息
- 1. 青海省格尔木市气象局,青海格尔木 816099
- 折叠
摘要
利用1961～2019年柴达木盆地9个国家站冬季逐日温度和作物生长季(5～9月)温度资料,分析柴达木盆地低温事件变化特征.结果表明:(1)柴达木盆地冬季平均温度、最低温度和极端最低温度整体呈显著快速上升趋势,平均最低温度和极端最低温度空间分布呈西北低东南高.(2)低温事件频次呈显著减少趋势,空间分布总体呈北多南少,地区差异较大.15a左右的振荡周期较为明显,在1994年发生突变.(3)60年代低温事件较多,之后随年代的增加而减少.(4)西藏高原-1指数和西藏高原-2指数是影响极端低温事件频次、活动积温距平A和各月平均气温距平和B的主要因素.
Abstract
Based on the winter daily temperature and crop growing season(May-September)temperature data from 9 national stations in Qaidam Basin from 1961 to 2019,the variation characteristics of low temperature events in Qaidam Basin were analyzed.The results show that:(1)The average temperature,minimum temperature and extreme minimum temperature in winter in Qaidam Basin show a significant and rapid rising trend,and the spatial distribution of the average minimum temperature and extreme minimum temperature is lower in the northwest and higher in the southeast.(2)The frequency of low temperature events showed a significant decreasing trend,and the spatial distribution was more in the north than in the south,with great regional differences.The oscillation period of about 15 years is more obvious,and a sudden change occurred in 1994.(3)There were more low temperature events in the 1960s,and then they decreased with the increase of the age.(4)The Tibet Plateau-1 index and the Tibet Plateau-2 index are the main factors affecting the frequency of extreme low temperature events,the active accumulated temperature anomaly A and the monthly average temperature anomaly B.
关键词
低温事件/时空特征/大气环流/生长季/柴达木盆地Key words
Low temperature event/Spatio-temporal characteristics/Atmospheric circulation/The growing season/Qaidam Basin引用本文复制引用
基金项目
青海省科技厅科技重大专项(2019-ZJ-A10)
青海省气象局面上项目()
出版年
2024
NETL
NSTL
万方数据