7月850 hPa和500 hPa北太副高强度异常的时空特征对比分析  

COMPARATIVE ANALYSIS OF SPATIAL TEMPORAL FEATURES OF 850 hPa AND 500 hPa NORTH PACIFIC SUBTROPICAL HIGH INTENSITY(NPSHI)ANOMALY IN JULY

作　　者：赵娅琴 杨沛琼 左涛 ZHAO Ya-qin;YANG Pei-qiong;ZUO Tao(Qingdao National Laboratory for Marine Science and Technology Development Centre,Qingdao 266235,Shandong,China;Lijiang Meteorological Bureau,Lijiang 674100,Yunnan,China;Tianjin Central Observatory for Oceanic Meteorology,Tianjin 300074,China)

机构地区：[1]青岛海洋科学与技术国家实验室发展中心,山东青岛266235 [2]丽江市气象局,云南丽江674100 [3]天津海洋中心气象台,天津300074

出　　处：《云南地理环境研究》2020年第6期59-65,70,共8页Yunnan Geographic Environment Research

摘　　要：基于1951~2010年NCEP/NCAR再分析资料,利用小波分析、合成分析、相关分析、student t检验等方法,对比分析了7月850 hPa和500 hPa北太副高强度异常的纬向风场、矢量风场、气温场、垂直速度场等时空特征。结果表明:(1)850 hPa和500 hPa副高强度指数均在7月出现峰值;(2)7月高空纬向风场在西北太平洋中纬度、赤道东太平洋地区仅与500 hPa副高强度显著相关,且分别呈正、负相关;(3)7月850 hPa矢量风场在东亚梅雨锋区、赤道东太平洋地区主要受500 hPa副高影响;(4)700 hPa气温场在日本海区域与850 hPa和500 hPa副高强度分别呈正、负相关;(5)7月在中国长江流域及墨西哥西岸海域500 hPa垂直速度主要与500 hPa副高强度呈负相关。Based on NCEP/NCAR reanalysis datasets during 1951~2010,using methods of wavelet analysis,composite analysis,correlation analysis,and Student’s t test,this work studies zonal wind field,vector wind field,temperature field and vertical velocity field of the spatial temporal features of North Pacific subtropical high intensity(NPSHI)anomaly in July at 850 hPa and 500 hPa.The result showed:(1)The NPSHI index at 850 hPa and 500 hPa reach their peaks in July.(2)Zonal winds at high altitude in July only correlate with NPSHI at 500 hPa,positively in mid-latitude of the northwestern Pacific and negatively in the tropical eastern Pacific.(3)In Meiyu front area of eastern Asia and tropical eastern Pacific,vector winds field at 850 hPa in July is dominated by the 500 hPa NPSH.(4)In Sea of Japan,temperature field at 700 hPa shows positive and negative correlation with NPSHI at 850 hPa and 500 hPa,respectively.(5)Vertical velocity at 500 hPa negatively correlates with NPSHI at 500 hPa in July in Yangtze River basin of China and western coast of Mexico.

关 键 词：北太副高 强度指数 风场 气温场 垂直速度场 

分 类 号：P424.35[天文地球—大气科学及气象学]