DOI: 10.1002/2017JC013177
Scopus记录号: 2-s2.0-85044340931
论文题名: Dynamical Characterization of a Low Oxygen Submesoscale Coherent Vortex in the Eastern North Atlantic Ocean
作者: Pietri A. ; Karstensen J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 3 起始页码: 2049
结束页码: 2065
语种: 英语
英文关键词: oxygen
; submesocale
Scopus关键词: mooring system
; oxygen
; Rossby number
; satellite altimetry
; spatial resolution
; thermohaline structure
; underwater vehicle
; Atlantic Ocean
; Atlantic Ocean (North)
; Cape Verde [Macaronesia]
; Strawberry crinkle virus
英文摘要: A submesoscale coherent vortex (SCV) with a low oxygen core is characterized from underwater glider and mooring observations from the eastern tropical North Atlantic, north of the Cape Verde Islands. The eddy crossed the mooring with its center and a 1 month time series of the SCV's hydrographic and upper 100 m currents structure was obtained. About 45 days after, and ∼100 km west, the SCV frontal zone was surveyed in high temporal and spatial resolution using an underwater glider. Satellite altimetry showed the SCV was formed about 7 months before at the Mauritanian coast. The SCV was located at 80–100 m depth, its diameter was ∼100 km and its maximum swirl velocity ∼0.4 m s−1. A Burger number of 0.2 and a vortex Rossby number 0.15 indicate a flat lens in geostrophic balance. Mooring and glider data show in general comparable dynamical and thermohaline structures, the glider in high spatial resolution, the mooring in high temporal resolution. Surface maps of chlorophyll concentration suggest high productivity inside and around the SCV. The low potential vorticity (PV) core of the SCV is surrounded by filamentary structures, sloping down at different angles from the mixed layer base and with typical width of 10–20 km and a vertical extent of 50–100 m. © 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/114357
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Now at LOCEAN-IPSL, UPMC, Paris, France
Recommended Citation:
Pietri A.,Karstensen J.. Dynamical Characterization of a Low Oxygen Submesoscale Coherent Vortex in the Eastern North Atlantic Ocean[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)