MJO与热带风场、海温日变化的关系-海洋预报

MJO与热带风场、海温日变化的关系

单位：1. 国家海洋局南通海洋环境监测中心站, 江苏南通 226002;
2. 南京信息工程大学大气科学学院, 江苏南京 210044;
3. 南京信息工程大学海洋科学学院, 江苏南京 210044

分类号：P732

出版年·卷·期（页码）：2018·35·第一期（80-94）

摘要：

利用CCMP的风场、NOAA地表日均太阳辐射通量等资料，研究了MJO与风场和海表温度日变化的关系。结果表明： MJO不同位相时，风场及海表温度日变化有明显不同。当夏季MJO处于发展位相（位相1—4）时，赤道印度洋经向风场的日变化偏弱；而西太平洋经向风场的日变化偏强；当MJO处于成熟位相（位相5—8）时，赤道印度洋和西太平洋的经向风场日变化与发展位相时相反。MJO对于海表温度场日变化的调制，冬季比夏季表现得更加明显。同时使用Dynamo的实测资料证明了在经验公式中赤道地区驱动海温日增暖的主要因子是风场的变化，辐射场对其影响远不如风场的变化。

The relationship between MJO and wind diurnal cycle and sea surface temperature (SST) diurnal warming are analyzed by using CCMP wind field and NOAA surface solar flux. The results are as follows:Wind diurnal cycle and SST diurnal warming are significantly different when MJO in different phases. In summer, when MJO is in phases 1 to 4, the equatorial Indian ocean has strong precipitation and weak solar radiation, meridional wind (v) diurnal cycle becomes weak. V diurnal cycle in the Indian ocean becomes strong when MJO in phases 5-8. The meridional diurnal cycle in the western Pacific has an opposite performance with that in the Indian ocean. The effect of MJO on SST diurnal warming is stronger in winter than that in summer. The Dynamo observation data proves that the main factor causing sst diurnal warming in an empirical formula in the equatorial region is the changes of wind. The effect of radiation is far less than that of wind.

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