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首页> 外文期刊>Pure and Applied Geophysics >Biweekly Sea Surface Temperature over the South China Sea and its association with the Western North Pacific Summer Monsoon
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Biweekly Sea Surface Temperature over the South China Sea and its association with the Western North Pacific Summer Monsoon

机译：南海海洋海面温度及其与西北太平洋夏季季风联系

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摘要

The association of the biweekly intraseasonal (BWI) oscillation in the Sea Surface Temperature (SST) over the South China Sea (SCS) and the Western North Pacific Summer Monsoon is authenticated using version 4 the Tropical Rainfall Measuring Mission Microwave Imager data (SST and rain) and heat fluxes from Ocean Atmosphere Flux project data during 1998-2012. The results suggest that the SCS involves ocean-atmosphere coupling on biweekly timescales. The positive biweekly SST anomalies lead the rain anomalies over the SCS by 3 days, with a significant correlation coefficient (r = 0.6, at 99 % significance levels) between the SST-rain anomalies. It is evident from lead/lag correlation between biweekly SST and zonal wind shear that warm ocean surface induced by wind shear may contribute to a favorable condition of the convective activity over the SCS. The present study suggests that ocean-to-atmospheric processes induced by the BWI oscillation in the SCS SST results in enhanced sea level pressure and surface shortwave radiation flux during the summer monsoon. Besides, it is observed that the SCS BWI oscillation in the changes of SST causes a feedback in the atmosphere by modifying the atmospheric instability. This suggests that the active/break biweekly cycle of the SST over the SCS is related by sea level pressure, surface heat fluxes and atmospheric instability. The potential findings here indicate that the biweekly SST over the SCS play an important role in the eastward and the southward propagation of the biweekly anomalies in the Western North Pacific.
机译：南海（SST）在南海（SST）和西北太平洋夏季季风在南海地表温度（SST）的协会是通过第4版进行认证的热带降雨测量任务微波成像数据（SST和Rain ）1998 - 2012年海洋气氛磁通项目数据中的热量流量。结果表明，SCS涉及海洋气氛在双周时间耦合。积极的双周SST异常在SST降雨异常之间引导3天通过SCS过雨异常，在3天内，具有显着的相关系数（R = 0.6，在99％的显着性水平下）。从母剪诱导的热海洋表面之间的引线/滞后相关性是明显的，风剪诱导的温暖海洋表面可能有助于SCS上对流活性的有利条件。本研究表明，SCS SST中BWI振荡诱导的海北大气过程导致夏季季风期间增强的海平压力和表面短波辐射通量。此外，观察到SST的变化中的SCS BWI振荡通过改变大气不稳定性导致大气中的反馈。这表明SST通过SSS的主动/断开双周周期循环受海平面压力，表面热通量和大气不稳定有关。这里的潜在结果表明，SSS在SCS上的双周SST在东北太平洋西部西北部的双周异常的南方传播中发挥着重要作用。

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