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西北太平洋上层海洋对台风响应的合成分析研究
胡冬,毛科峰,陈希,赵艳玲,李妍
0
(解放军31010部队,北京 100081;国防科技大学气象海洋学院,江苏 南京 211101)
摘要:
基于台风最佳路径资料和20a的Argo浮标资料,采用一种合成分析方法,得到了西北太平洋上层海洋的温度、盐度、溶解氧等三维要素场对台风的平均响应特征,结果表明:台风移动路径右侧海表面温度呈明显的负异常,即具有“右偏性”,次表层在“热泵”和“冷抽吸”共同影响下,温度异常呈正负相间的分布,次表层以下大部区域以温度负异常为主,但“右偏性”已不明显;表层至1 000 m深度,各层占主导的盐度异常值呈“正-负-正”的垂向分布,次表层以下,各层的盐度异常在平行和垂直于台风路径方向上的分布较为均匀,不具有明显的各向性差异;表层至1 000 m深度层,溶解氧浓度呈“小-大-小”的垂向分布,各层的平面分布特征较为相似,均在平行于台风路径-2~2R50范围存在一带状高值区域;温度、盐度、溶解氧浓度等要素对台风的平均响应深度可达到 1 000 m 以上.
关键词:  海洋气象学  台风  响应  Argo浮标资料  合成分析  上层海洋
DOI:10.3969/J.ISSN.2095-4972.2018.04.006
基金项目:国家自然科学基金资助项目(11102232);江苏省自然科学基金资助项目(BK20150711)
Composing analysis on upper ocean response to typhoon in the northwest Pacific
HU Dong,MAO Ke-feng,CHEN Xi,ZHAO Yan-ling,LI Yan
(The 31010 Army of PLA, Beijing 100081, China;ollege of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China)
Abstract:
Response of three-dimensional fields of temperature, salinity and dissolved oxygen (DO) to typhoons in the northwestern Pacific was analyzed by a composing analytical method based on 20-year Argo buoy data. The results show that on the right side of typhoon tracks, sea surface temperature showed significant negative anomalies, i.e. being a “right-hand-side intensification”, while in the subsurface layer, it is mixed with positive and negative anomalies due to both heat pump effect and the cold suction effect. In the layers below the subsurface, it is dominated by negative temperature anomalies, while the “right-hand-side intensification” is not obvious. From surface to the depth of 1 000 m, vertical distribution of salinity anomaly of each layer represents a “positive-negative-positive” variation feature. At each horizontal layer below surface, salinity anomaly field is more uniform in both parallel and perpendicular to the direction of typhoon track. From surface to 1 000 m depth, concentrations of DO represent “low-high-little” distribution. Horizontal distribution of DO in each layer is similar, that is, there exists a high value band area along the typhoon track. Response of average depth of temperature, salinity and DO to typhoon can penetrate more than 1 000 m according to the composing results.
Key words:  marine meteorology  typhoon  response  Argo floats data  composing analysis  upper ocean

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