文献类型：期刊文献

英文题名：Coherence of Eddy Kinetic Energy Variation during Eddy Life Span to Low-Frequency Ageostrophic Energy

作者：Zhang, Zhisheng[1];Xie, Lingling[1,2,3];Zheng, Quanan[4];Li, Mingming[1,2,3];Li, Junyi[1,2,3];Li, Min[1,2,3]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[2]Key Lab Climate Resources & Environm Continent Sh, Zhanjiang 524088, Peoples R China;[3]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat LOR, Beijing 100081, Peoples R China;[4]Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA

年份：2022

卷号：14

期号：15

外文期刊名：REMOTE SENSING

收录：SCI-EXPANDED(收录号：WOS:000839679600001)、、EI(收录号：20223612686878)、Scopus(收录号：2-s2.0-85137088278)、WOS

基金：This research was funded by the National Natural Science Foundation of China (41776034 and 411706025), the Project of Enhancing School with Innovation of Education Department of Guangdong Province (2019KCXTF021), and the Guangdong Province First-Class Discipline Plan (080503032101 and 231420003).

语种：英文

外文关键词：mesoscale eddy; eddy kinetic energy; eddy life span; low-frequency motion; barotropic conversion rate

外文摘要：The evolution of mesoscale eddies is crucial for understanding the ocean energy cascade. In this study, using global reanalysis sea surface velocity data and a mesoscale eddy trajectory product tracked by satellite altimeters, we aimed to reveal the coherence of eddy kinetic energy (EKE) variation to low-frequency ageostrophic energy during the eddy life span. The variation in EKE throughout the eddy life span was highly coherent to that of the seven-day low-passed ageostrophic kinetic energy, with a correlation coefficient of -0.94. The low-frequency ageostrophic motions supplied 38% of the EKE variation in the growing stage of mesoscale eddies and absorbed 42% in the decaying stage. The evolution rate of the EKE during the eddy life span was consistent with the barotropic conversion rate of the low-frequency ageostrophic motions, further confirming the dominant role of low-frequency ageostrophic motions in eddy growth and decay.