气象Issue(8)：940-947,8.DOI:10.7519/j.issn.1000-0526.2014.08.004
利用经验正交函数绘制低频天气图的研究
Exploration of the Low-Frequency Synoptic Chart Used by EOF
摘要
Abstract
Based on NCEP/NCAR1 reanalysis data and GFS model data,using empirical orthogonal func-tion (EOF)decomposition and Morlet wavelet transform to produce EOF low-frequency (LF)synoptic map.The method can adjust the LF cycle according to atmospheric own LF characteristics.Analysis showed that:EOF LF synoptic map seems better in terms of location and flow of the system’s main LF low-latitude areas critical convergence zone while Butterworth LF synoptic map is good at high latitudes LF systems.Also,we try to use GFS model forecast fields to get the next 1-10 days EOF LF forecast map to increase the extended forecast by LF synoptic maps method.关键词
低频天气图/经验正交分解/Morlet小波分析/延伸期预报时效Key words
low-frequency (LF)synoptic map/empirical orthogonal function (EOF)/Morlet wavelet anal-ysis/extended forecast分类
天文与地球科学引用本文复制引用
信飞,李德琳,王超,孙国武..利用经验正交函数绘制低频天气图的研究[J].气象,2014,(8):940-947,8.基金项目
上海市自然科学基金（12ZR1449400）、公益性行业（气象）科研专项（GYHY201306030）及国家自然科学基金项目（41205060）共同资助 （）
