Processes involved in the second-year warming of the 2015 El Nio event as derived from an intermediate ocean model
Processes involved in the second-year warming of the 2015 El Nio event as derived from an intermediate ocean model
复制标题
根据中间海洋模型得出的 2015 年厄尔尼诺事件第二年变暖的过程
DOI：
10.1007/s11430-016-0201-9
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Gao Chuan
中科院分区：
文献类型：
--
作者：
Zhang RongHua;Gao Chuan
热带太平洋从2014年开始经历了持续的温暖海面状况，并在2015年经历了非常强烈的厄尔尼诺事件。这一事件的一个显著特征是2014-2015年赤道太平洋中西部持续存在的马蹄形正次表层热异常模式。利用观测资料和中间海洋模式对2014-2015年的海表温度（SST）演变进行了描述。重点放在2015年厄尔尼诺事件所涉及的过程及其与SST异常的关系，包括与海洋赤道波（如海平面（SL）信号所示）在边界处的传播和反射相关的远程影响以及正次表层热异常的局部影响。结果表明，2014-2015年持续的次表层热力异常对维持赤道太平洋暖海温异常具有重要作用。对SST收支的进一步分析揭示了2014-2015年期间造成SST异常的主要过程。这些分析有助于更好地了解与2015年厄尔尼诺事件相关的过程与当前厄尔尼诺和南方涛动理论的一致程度。
The tropical Pacific experienced a sustained warm sea surface condition that started in 2014 and a very strong El Niño event in 2015. One striking feature of this event was the horseshoe-like pattern of positive subsurface thermal anomalies that was sustained in the western-central equatorial Pacific throughout 2014–2015. Observational data and an intermediate ocean model are used to describe the sea surface temperature (SST) evolution during 2014–2015. Emphasis is placed on the processes involved in the 2015 El Niño event and their relationships with SST anomalies, including remote effects associated with the propagation and reflection of oceanic equatorial waves (as indicated in sea level (SL) signals) at the boundaries and local effects of the positive subsurface thermal anomalies. It is demonstrated that the positive subsurface thermal anomaly pattern that was sustained throughout 2014–2015 played an important role in maintaining warm SST anomalies in the equatorial Pacific. Further analyses of the SST budget revealed the dominant processes contributing to SST anomalies during 2014–2015. These analyses provide an improved understanding of the extent to which processes associated with the 2015 El Niño event are consistent with current El Niño and Southern Oscillation theories.