doi:  10.3878/j.issn.1006-9895.1805.18117
全球海洋蒸发量年代际变化归因:动力因子分析

Interdecadal Changes in Global Ocean Evaporation: Dynamic Factors Analysis
摘要点击 425  全文点击 318  投稿时间:2018-01-22  
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  国家自然科学基金项目41530531、41705053,国家重点基础研究发展计划项目2017YFC1502300
中文关键词:  海洋蒸发量  动力调整方法  年代际转折  动力因子
英文关键词:  Ocean evaporation  Dynamical adjustment method  Interdecadal turning  Dynamic factors
        
作者中文名作者英文名单位
黄必城HUANG Bicheng兰州大学大气科学学院,兰州730000
苏涛SU Tao扬州大学物理科学与技术学院,扬州225002
封国林and FENG Guolin兰州大学大气科学学院,兰州730000;扬州大学物理科学与技术学院,扬州225002;中国气象局国家气候中心气候研究开放实验室,北京100081
引用:黄必城,苏涛,封国林.2019.全球海洋蒸发量年代际变化归因:动力因子分析[J].大气科学,43(3):525-538,doi:10.3878/j.issn.1006-9895.1805.18117.
Citation:HUANG Bicheng,SU Tao,and FENG Guolin.2019.Interdecadal Changes in Global Ocean Evaporation: Dynamic Factors Analysis[J].Chinese Journal of Atmospheric Sciences (in Chinese),43(3):525-538,doi:10.3878/j.issn.1006-9895.1805.18117.
中文摘要:
      本文基于动力调整方法,利用客观分析海气通量(OAFlux)资料研究了1958~2016年全球海洋蒸发量变化及其动力作用和辐射强迫分量的变化,发现海洋蒸发量及其动力作用分量具有一致性年代际变化特征,特别是在20世纪70年代及90年代末期存在明显的年代际转折。进一步分析发现:主要动力因子有太平洋—北美遥相关型(PNA)、北极涛动(AO)、北大西洋涛动(NAO)、厄尔尼诺—南方涛动(ENSO)和阿留申低压(AL),并受到太平洋年代际振荡(PDO)的影响,其中,1970年代末期的转折与PNA、PDO、ENSO和AL密切相关,而1990年代末期的转折还与NAO变化有关。动力作用分量的前六个模态解释方差达到67.5%,其中,低纬北太平洋和印度洋蒸发异常主要与海表温度(SST)及其引起的环流异常有关,南太平洋、中纬北太平洋和北大西洋蒸发异常与环流异常直接相关。ENSO与PDO在全球海洋蒸发量上的影响要大于NAO。单因子相关分析发现南方涛动指数(SOI)、NAO和PDO与海洋蒸发年代际变化密切相关。总体来说,动力作用分量在海洋蒸发的年代际变化中起主导作用,其中,以ENSO、NAO和PDO的影响最大。
Abstract:
      Using the dynamical adjustment method, variations of ocean evaporation and its dynamically induced and radiative forced components from 1958 to 2016 are studied based on the Objectively Analyzed Air-sea Fluxes (OAFlux) dataset. It is found that ocean evaporation and its dynamically induced components have consistent interdecadal changes, especially the transitions that occurred in the late 1970s and 1990s. Further analysis shows that the major dynamic factors that affect ocean evaporation are the Pacific-North America teleconnection (PNA), the Arctic Oscillation (AO), the North Atlantic Oscillation (NAO), El Niño-Southern Oscillation (ENSO) and Aleutian Low (AL). The Pacific Decadal Oscillation (PDO) also has certain impacts. Among these factors, the transition in the 1970s is closely related to the PNA, PDO, ENSO and AL, while the transition in the 1990s is also related to NAO. The first six leading modes of dynamically induced components explain up to 67.5% of the total variance. The anomalies of evaporation in the North Pacific and the Indian Ocean at low latitudes are mainly related to SST and circulation anomalies induced by SST. The evaporation anomalies in the South Pacific, the North Pacific over middle latitudes and the North Atlantic are directly related to anomalies of circulation. ENSO, and PDO have greater impacts on global ocean evaporation than the NAO. Single factor correlation shows that the Southern Oscillation Index (SOI) and changes in the NAO and PDO coincide with the interdecadal variation of ocean evaporation. In general, the dynamically induced component dominates the interdecadal changes of ocean evaporation mainly by ENSO, NAO, and PDO.
主办单位:中国科学院大气物理研究所 单位地址:北京市9804信箱
联系电话: 010-82995051,010-82995052传真:010-82995052 邮编:100029 Email:dqkx@mail.iap.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09060247号