1993-2022年罗斯海夏季感热和潜热通量的年际变化  

Interannual variation of summer sensible and latent heat fluxes in the Ross Sea from 1993 to 2022

作　　者：姚洁 何海伦 孙群 于乐江 张艺杰 于璐莎 李学琪 YAO Jie;HE Hailun;SUN Qun;YU Lejiang;ZHANG Yijie;YU Lusha;LI Xueqi(College of Marine and Environmental Sciences,Tianjin University of Science and Technology,Tianjin 300222,China;State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China;Polar Research Institute of China,Shanghai 200136,China)

机构地区：[1]天津科技大学海洋与环境学院,天津300222 [2]卫星海洋环境动力学国家重点实验室,自然资源部第二海洋研究所,浙江杭州310012 [3]南方海洋科学与工程广东省实验室(珠海),广东珠海519082 [4]中国极地研究中心(中国极地研究所),上海200136

出　　处：《极地研究》2024年第2期211-220,共10页Chinese Journal of Polar Research

基　　金：极地调查专项(IRASCC 01-01-01B,02-01-02);卫星海洋环境动力学国家重点实验室资助项目(SOEDZZ2206)资助。

摘　　要：大气下垫面感热和潜热通量是海-冰-气耦合系统中重要的环境变量。基于欧洲中期天气预报中心(ECMWF)提供的第五代再分析资料(ERA5),本文研究了1993-2022年南大洋罗斯海夏季月份感热和潜热通量的年际变化。1月气候态分布显示,感热和潜热通量绝对值在空间上表现为陆架高海盆低。感热和潜热通量异常场的经验正交函数分析表明,前三模态累积方差贡献率超过75%,第一模态空间型主要强调区域一致变化,且第一模态时间系数存在约2.9年和4.4年的变化周期。陆架区感热和潜热通量的年际变化具有非常高的相关性。另一方面,感热通量与风速和海-气温差具有较高相关性,潜热通量与风速和海-气比湿差具有较高相关性,这些相关系数具有明显的空间分布。研究量化了南大洋罗斯海夏季感热和潜热通量年际变化,初步探讨了感热和潜热通量年际变化影响因素,可为南大洋罗斯海海-冰-气相互作用研究提供参考。Atmospheric surface sensible and latent heat fluxes are important environmental variables in the coupled ocean–ice–atmosphere system.This study quantifies the interannual variations of summer sensible and latent heat fluxes in the Ross Sea of the Southern Ocean and presents a preliminary discussion of the possible factors influencing the interannual variations of sensible and latent heat fluxes.Based on the European Centre for Medium-Range Weather Forecasts(ECMWF)Fifth-generation Reanalysis(ERA5)data,the interannual variations of sensible and latent heat fluxes during the summer months of 1993–2022 in the Ross Sea were studied.The absolute values of the January climatological sensible and latent heat fluxes on the shelf are higher than those in the deep basin.Results from the empirical orthogonal function analysis of sensible heat and latent heat flux anomalies show that the first three modes explain more than 75%of the total variance.For the first modes,there are roughly consistent regional spatial patterns as well as considerable interannual variations in the time coefficients;dominant periods are approximately 2.9 and 4.4 years.Spatial averages of sensible heat and latent heat fluxes on the shelf indicate high correlation between the interannual variations of sensible and latent heat fluxes.Finally,sensible heat flux shows relatively high correlation with wind speed and air–sea temperature difference,latent heat flux shows relatively high correlation with wind speed and air–sea specific humidity difference,while these correlations show clear spatial variations.Study results provide a reference for the study of ocean–ice–atmosphere interactions in the Ross Sea.

关 键 词：感热和潜热通量 ERA5 年际变化 罗斯海 南大洋 

分 类 号：P433[天文地球—大气科学及气象学]