气象学报2024，Vol.82Issue(4)：427-442,16.DOI:10.11676/qxxb2024.20230119
北太平洋副极地海洋锋四季变异特征及其与中纬度大气的联系
Seasonal variation characteristics of the subarctic front in North Pacific and its relationship with the mid-latitude atmosphere
摘要
Abstract
Statistical analysis and dynamical diagnosis of high-resolution oceanic and atmospheric reanalysis data are conducted to reveal the characteristics and causes of seasonal intensity variation of the Subarctic Oceanic Frontal Zone(SAFZ)in the North Pacific,and elucidate the characteristics of mid-latitude atmospheric circulation anomalies associated with the SAFZ seasonal variation and corresponding dynamic processes.The results indicate that the SAFZ is strong in autumn,winter and spring,and relatively weak in summer.The meridional advection process of Sea Surface Temperature(SST)is the dominant factor that maintains SAFZ's intensity in autumn,winter and spring,while the net heat flux exchange process at the sea-air interface plays a decisive role in the weakening of SAFZ's intensity in summer.Accompanied with the SAFZ's intensity variability in different seasons,the boundary layer turbulent heat flux anomalies develop,and the diabatic heating anomalies lead to anomalies of low-level atmospheric meridional temperature gradient and atmospheric baroclinicity above the SAFZ,and then lead to the anomalies of atmospheric transient eddy activities.Due to the dominant influence of anomalous atmospheric transient eddy vorticity forcing,equivalent barotropic structure anomalies of atmospheric geopotential height field and wind field occur over the regions of mid-latitude North Pacific and eastern and northeastern China,and the corresponding anomalous field of atmospheric circulation exhibiting seasonal differences.关键词
副极地海洋锋区/海温异常/四季变异/大气瞬变涡旋强迫/中纬度大气环流Key words
Subarctic oceanic frontal zone/Sea temperature anomaly/Seasonal variations/Atmospheric transient eddy forcing/Mid-latitude atmospheric circulation分类
天文与地球科学引用本文复制引用
张然,陈圣劼,黄晶..北太平洋副极地海洋锋四季变异特征及其与中纬度大气的联系[J].气象学报,2024,82(4):427-442,16.基金项目
江苏省自然科学青年基金(BK20231110)、中国气象科学研究院基本科研业务费专项资金(2022Y026)、江苏省青年科技人才托举工程(TJ-2022-053)、中国科学院南海海洋研究所自主部署项目(SCSI02023QY01). （BK20231110）
