DOI: 10.1002/2017JC013285
Scopus记录号: 2-s2.0-85041735963
论文题名: Modeling the Wake of the Marquesas Archipelago
作者: Raapoto H. ; Martinez E. ; Petrenko A. ; Doglioli A.M. ; Maes C.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1213
结束页码: 1228
语种: 英语
英文关键词: eddy detection
; eddy kinetic energy
; fine-scale processes
; Island mass effect
; Island wakes
; Marquesas archipelago
Scopus关键词: anticyclone
; cyclone
; eddy covariance
; in situ measurement
; kinetic energy
; nearshore dynamics
; numerical model
; remote sensing
; seasonality
; wake
; wind stress
; Marquesas Islands
英文摘要: In this study, a high-resolution (∼2.5 km) numerical model was set up to investigate the fine-scale activity within the region of the Marquesas archipelago. This has never been performed before. The robustness of the model results is assessed by comparison with remote sensing and in situ observations. Our results highlight regions of warm waters leeward of the different islands with high eddy kinetic energy (EKE) on their sides. The analysis of energy conversion terms reveals contributions to EKE variability by wind, baroclinic, and barotropic instabilities. The use of a geometry-based eddy detection algorithm reveals the generation of cyclonic and anticyclonic eddies in the wake of the largest islands, with both an inshore and offshore effect. Maximum eddy activity occurs in austral winter following the seasonality of both wind stress and EKE intensity. Most eddies have a radius between 20 and 30 km and are generally cyclonic rather than anticyclonic. Significant vertical velocities are observed in the proximity of the islands, associated with topographically induced flow separation. Eddy trapping inshore waters are advected offshore in the wake of the islands. The overall influence of these fine-scale dynamics could explain the strong biological enhancement of the archipelago. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114491
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: IRD, UPF, ILM, Ifremer, Écosystèmes Insulaires Océaniens, Tahiti, French Polynesia; Aix Marseille Univ, Université de Toulon, CNRS, IRD, OSU PYTHEAS, Mediterranean Institute of Oceanography MIO, UM 110, Marseille, Cedex, France; Laboratoire d 'Océanographie Physique et Spatiale, Université Brest, Ifremer, CNRS, IRD, IUEM, Brest, France
Recommended Citation:
Raapoto H.,Martinez E.,Petrenko A.,et al. Modeling the Wake of the Marquesas Archipelago[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)