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Atmospheric Responses to Mesoscale Oceanic Eddies in the Winter and Summer North Pacific Subtropical Countercurrent Region
Atmosphere ( IF 2.9 ) Pub Date : 2020-08-03 , DOI: 10.3390/atmos11080816 Jianxiang Sun , Suping Zhang , Christopher J. Nowotarski , Yuxi Jiang
Atmosphere ( IF 2.9 ) Pub Date : 2020-08-03 , DOI: 10.3390/atmos11080816 Jianxiang Sun , Suping Zhang , Christopher J. Nowotarski , Yuxi Jiang
In the winter and summer North Pacific Subtropical Countercurrent region, the atmospheric responses to 20,000+ mesoscale oceanic eddies (MOEs) are examined using satellite and reanalysis data from 1999 to 2013. The composite results indicate that surface wind speed, cloud, and precipitation anomalies are positively correlated with sea surface temperature anomalies in both seasons. The surface wind speed anomalies and convective precipitation anomalies show dipolar structures centering on MOEs in winter and on unipolar structures in summer. In both seasons, the vertical mixing mechanism plays an obvious role in the atmospheric responses to MOEs. In addition, the distributions of sea level pressure anomalies in winter reflects the effects of the pressure adjustment mechanism. Due to the seasonal variations in the atmospheric background state and the MOEs, the sensitivities of surface wind speeds, clouds, and precipitation responses to MOEs in summer are over 30% higher than those in winter.
中文翻译:
北太平洋亚热带逆流地区冬季和夏季对中尺度海洋涡旋的大气响应
在冬季和夏季的北太平洋亚热带逆流地区,使用1999年至2013年的卫星和再分析数据,研究了大气对20,000+个中尺度海洋涡旋(MOE)的响应。综合结果表明,地表风速,云和降水异常为与两个季节的海表温度异常呈正相关。地表风速异常和对流降水异常表现为偶极结构,冬季以MOE为中心,夏季以单极结构为中心。在两个季节中,垂直混合机制在大气对MOE的响应中都起着明显的作用。另外,冬季海平面压力异常的分布反映了压力调节机制的作用。
更新日期:2020-08-03
中文翻译:
北太平洋亚热带逆流地区冬季和夏季对中尺度海洋涡旋的大气响应
在冬季和夏季的北太平洋亚热带逆流地区,使用1999年至2013年的卫星和再分析数据,研究了大气对20,000+个中尺度海洋涡旋(MOE)的响应。综合结果表明,地表风速,云和降水异常为与两个季节的海表温度异常呈正相关。地表风速异常和对流降水异常表现为偶极结构,冬季以MOE为中心,夏季以单极结构为中心。在两个季节中,垂直混合机制在大气对MOE的响应中都起着明显的作用。另外,冬季海平面压力异常的分布反映了压力调节机制的作用。