黑龙江气象
黑龍江氣象
흑룡강기상
HEILONGJIANG METEOROLOGY
2013年
4期
7-11
,共5页
东北地区%夏季降水%EOF%小波分析%时空变化
東北地區%夏季降水%EOF%小波分析%時空變化
동북지구%하계강수%EOF%소파분석%시공변화
Northeast area%summer precipitation%EOF%wavelet analysis%temporal and spatial variation
东北地区地处中高纬欧亚大陆东岸，处在东亚季风区的边缘，其降水主要集中在夏季，并且降水量具有显著的地域差异和年际变化。研究东北夏季降水特点，可为降水预报、气候预测和农业生产提供可靠依据。本文利用东北地区27个测站1961-2010年夏季逐月降水资料，通过E-OF和小波分析的方法研究东北地区夏季降水的时空变化规律，结果表明：东北地区夏季降水量主要表现为三种空间分布型：总体一致型、南-北反位相型以及东南-西北反位相型；东北地区夏季降水量存在明显的年际变化，降水变化周期为8-11 a；东北地区夏季各月降水量的差异，主要是由地形原因和纬线跨度差异造成的。
東北地區地處中高緯歐亞大陸東岸，處在東亞季風區的邊緣，其降水主要集中在夏季，併且降水量具有顯著的地域差異和年際變化。研究東北夏季降水特點，可為降水預報、氣候預測和農業生產提供可靠依據。本文利用東北地區27箇測站1961-2010年夏季逐月降水資料，通過E-OF和小波分析的方法研究東北地區夏季降水的時空變化規律，結果錶明：東北地區夏季降水量主要錶現為三種空間分佈型：總體一緻型、南-北反位相型以及東南-西北反位相型；東北地區夏季降水量存在明顯的年際變化，降水變化週期為8-11 a；東北地區夏季各月降水量的差異，主要是由地形原因和緯線跨度差異造成的。
동북지구지처중고위구아대륙동안，처재동아계풍구적변연，기강수주요집중재하계，병차강수량구유현저적지역차이화년제변화。연구동북하계강수특점，가위강수예보、기후예측화농업생산제공가고의거。본문이용동북지구27개측참1961-2010년하계축월강수자료，통과E-OF화소파분석적방법연구동북지구하계강수적시공변화규률，결과표명：동북지구하계강수량주요표현위삼충공간분포형：총체일치형、남-북반위상형이급동남-서북반위상형；동북지구하계강수량존재명현적년제변화，강수변화주기위8-11 a；동북지구하계각월강수량적차이，주요시유지형원인화위선과도차이조성적。
The Northeast is located in the east coast of high-latitude Eurasia continent, along the monsoon boundary zone. The precipitation in the northeast concentrated in summer and its distribution has significant re-gional differences and interannual variations. The characteristics research of summer precipitation can provide re-liable basis for the precipitation forecast, climate prediction and agricultural production. Based on the monthly summer precipitation data of 1961-2010 from 27 stations, the temporal and spatial distribution of summer pre-cipitation in Northeast is analyzed by applying the empirical orthogonal function (EOF) and wavelet analysis. The results show that: the spatial distribution of summer precipitation in Northeast has three patterns: the overall con-sistent, South - North anti-phase and Southeast - Northwest anti-phase; Northeast summer precipitation has obvious interannual variability and the cycle is 8-11 years. The monthly difference of Northeast precipitation in summer was mainly caused by the terrain and latitude span difference.
