摘要
根据黑龙江省西部37个气象站降水资料以及NCEP的再分析资料,利用波谱分析法和Marakami的带通滤波技术,分析了2008年5~9月黑龙江省西部降水的季节内振荡(ISO)特征及其与大气环流的ISO之间的联系,以期提高目前1O^30天延伸期强降水的预报能力。结果表明:黑龙江省西部雨季降水季节内变化的主模是20~30天振荡;850 hPa层上影响黑龙江省西部的周期为20~30天的低频环流系统有两类传播模型,一类是由中纬度传到黑龙江省西部,另一类是来自高纬度地区;不同时段传播模型不完全相同;黑龙江省西部降水的20~30天振荡与它们的活动密切相关。
According to the west of Heilongjiang province 37 weather station data of precipitation and NCEP reanalysis data,using the spectrum analysis method and Marakami bandpass filtering technique,analysis of 2008 in Heilongjiang province from 5 to September precipitation in the west region of Intraseasonal Oscillation（ISO） features and the atmospheric circulation of the links between the ISO,in order to improve the current 1O - 30 day extension period strong precipitation forecast.The results showed that：Heilongjiang Province Western monsoon precipitation seasonal variation of the master mold is 20 - 30 day oscillation; 850 hPa layer on the western part of Heilongjiang province cycle for 20 to 30 days of low-frequency circulation system has two kinds of communication models,one is by the latitude to the west of Heilongjiang Province,the other one is from the high latitude in different periods,propagation model is not exactly the same,Western Heilongjiang province precipitation of 20 - 30 day oscillation and their activities are closely related.
出处
《林业勘查设计》
2014年第2期68-71,共4页
Forest Investigation Design
