春季北太平洋风暴轴的年际与年代际变化特征及其与太平洋海温异常的关系

发布时间：2018-06-17 21:10

本文选题：风暴轴 + 海温　；参考：《气象学报》2016年06期

【摘要】：利用20世纪大气再分析资料和欧洲中心海温资料研究了春季西北太平洋风暴轴的年(代)际变化特征以及在不同年代际背景下风暴轴与太平洋海温关系的转变。结果表明,春季西北太平洋风暴轴主要存在两种空间变化模态,即反映其强度变化的第1模态和反映其南北位置变化的第2模态。年代际及以上时间尺度上,风暴轴强度、位置与太平洋海温的关系主要表现为大气对海洋的强迫作用。在不同年代际背景下,风暴轴与太平洋海温的关系则存在明显的年代际转变:1977年以后,风暴轴强度与太平洋海温的关系主要表现为大气对海洋的强迫作用,而在1977年之前则主要表现为海洋对大气的强迫作用,特别是同期冬季日本以东黑潮和黑潮延伸区海温异常的强迫作用;风暴轴南北位置与太平洋海温异常的关系,在1977年以后表现为大气对海洋的强迫作用,主要表现为对北太平洋中部海温的影响,但在1977年以前表现为海洋和大气的共同作用,风暴轴南北位置的变化还与同期的赤道中东太平洋海温异常有关,表明ENSO可能对风暴轴的位置变化存在影响。
[Abstract]:Based on the atmospheric reanalysis data of the 20th century and the SST data of the European Center, the annual (intergenerational) variation of the spring northwest Pacific storm track and the transformation of the relationship between the storm track and the Pacific SST in different Interdecadal background are studied. The results show that there are mainly two modes of spatial variation in the northwest Pacific storm track in spring, that is, the first mode, which reflects the intensity change, and the second mode, which reflects the variation of its north and south position. On Interdecadal and above scale, the relationship between the intensity and position of storm track and Pacific SST is mainly manifested by atmospheric forcing on the ocean. In different Interdecadal background, the relationship between storm track and Pacific SST has obvious interdecadal transition. After 1977, the relationship between storm track intensity and Pacific SST was mainly manifested by the forcing effect of atmosphere on the ocean. Before 1977, the oceanic forcing on the atmosphere, especially the forcing of the sea surface temperature anomalies in the east of the Kuroshio and the Kuroshio in the same winter in Japan, and the relationship between the north-south position of the storm track and the Pacific SST anomaly, After 1977, it was manifested as atmospheric forcing on the oceans, mainly in the central North Pacific Ocean, but before 1977 as a combination of the oceans and the atmosphere, The variation of the north and south position of the storm track is also related to the equatorial Middle East Pacific SST anomaly in the same period, indicating that ENSO may have an effect on the location change of the storm track.
【作者单位】：南京信息工程大学气象灾害预报预警与评估协同创新中心和气象灾害教育部重点实验室;
【基金】：国家自然科学基金项目(41490643、41575077、41275094) 国家重大科学研究计划(2012CB955602) 江苏高校优势学科建设工程项目(PAPD)
【分类号】：P732

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