Impact of Explosive Cyclones on the Deep Ocean in the North Pacific: Simulations and Observations
Impact of Explosive Cyclones on the Deep Ocean in the North Pacific: Simulations and Observations
复制标题
爆炸性气旋对北太平洋深海的影响：模拟和观测
DOI：
10.1109/oceanskobe.2018.8558858
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Hosoda Shigeki
中科院分区：
文献类型：
--
作者：
Kuwano-Yoshida Akira;Sasaki Hideharu;Sasai Yoshikazu;Hosoda Shigeki
西北太平洋是最深的海洋，在其上方经常会在冬季形成爆发性气旋。最近，高分辨率的大气模式显示黑潮影响西北太平洋的爆发性气旋和降水。然而，爆炸性气旋是否影响海洋仍然是一个悬而未决的问题。为了了解海洋对爆发性气旋的响应，我们分析了涡旋分辨海洋模拟的结果，并在西北太平洋使用Argo浮标观测了爆发性气旋下的内部海洋。对爆发性气旋最活跃的165°E和42.5°N的长期海洋模拟的综合分析表明，爆发性气旋在表面混合层内引起大的水平辐散，并引起向上流动，达到2000 m深度。此外，爆发性气旋活动的年际变化还影响着深海垂直运动的振幅和温度的日尺度变化。为了观察海洋对爆炸性气旋的反应，我们在2015/2016和2016/2017年的两个冬季在西北太平洋部署了六个Argo浮标。用于特殊观测的阿尔戈浮标可通过卫星通信实时改变观测使命，包括剖面观测的时间间隔和深度。使命的改变是根据日本气象厅的中期集合预报数据进行的。当预报高概率预报一个爆发性气旋时，进行了650 m深度的6小时观测。另外，在每年冬季的11月至3月期间进行了2000米深度的每日观测。Argo浮标共观测剖面1148个。而在爆发性气旋下观测到的漂浮物有几个，在爆发性气旋下观测到的只有73个剖面。
The Northwestern Pacific Ocean is the deepest ocean above which explosive cyclones frequently develop in winter. Recently, high-resolution atmospheric models show that Kuroshio affects explosive cyclones and precipitation over the northwestern Pacific. However, it remains an open question whether explosive cyclones affect ocean. To understand oceanic response to explosive cyclones, we analyze results of eddy-resolving ocean simulations and observe internal ocean under explosive cyclones by Argo floats in the Northwestern Pacific. Composite analyses of long-term ocean simulation at 165°E and 42.5°N where explosive cyclones are most active show that explosive cyclones induce large horizontal divergence within the surface-mixed layer and upward flow that reaches 2000 m depth. In addition, interannual variability of explosive cyclone activity affects the amplitude of vertical motion and the daily-scale temperature variations in the deep ocean. To observe oceanic responses to explosive cyclones, we deployed six Argo floats in two winters in 2015/2016 and 2016/2017 in the Northwestern Pacific. The Argo floats used for the special observations allow real-time change of observation mission including time interval and depth of profile observation through satellite communication. The mission change was operated based on medium-range ensemble forecast data by Japan Meteorological Agency. When an explosive cyclone was predicted with high probability by the forecast, 6-hourly observations with 650 m depth were conducted. Otherwise daily observations with 2000 m depth were conducted between November and March in each winter. Argo floats observed 1148 profiles totally. While several floats observed under explosive cyclones, only 73 profiles observed under explosive cyclones.
影响因子：
3.1
作者：
Kobayashi, Shinya;Ota, Yukinari;Takahashi, Kiyotoshi
通讯作者：
Takahashi, Kiyotoshi