DOI: 10.1002/2017JC013728
Scopus记录号: 2-s2.0-85045704410
论文题名: Surface Drifter Observations From the Arctic Ocean's Beaufort Sea: Evidence for Submesoscale Dynamics
作者: Mensa J.A. ; Timmermans M.-L. ; Kozlov I.E. ; Williams W.J. ; Özgökmen T.M.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2635
结束页码: 2645
语种: 英语
英文关键词: Arctic Ocean
; drifters
; submesoscale
; turbulence
Scopus关键词: dispersion
; drifter
; frequency analysis
; measurement method
; salinity
; sea surface temperature
; statistical analysis
; subsurface flow
; turbulence
; wave dispersion
; wave spectrum
; Arctic Ocean
; Beaufort Sea
英文摘要: Position and velocity data are analyzed from a release of surface ocean drifters in the Arctic Ocean's Beaufort Sea in ice-free conditions. Position information is returned at sufficiently high frequency to allow for the investigation of surface-ocean flows ranging from around 0.5 km in lateral scale (submesoscale, SM, flows) to flows that are tens of kilometers in horizontal extent. Lagrangian statistics from the drifter release are analyzed in conjunction with Eulerian (ship-based) measurements of surface ocean temperature and salinity. Results show dynamics that are largely consistent with flows at similar scales in the midlatitude oceans. Horizontal wavenumber k spectra of density in the surface ocean scale as K-2, consistent with energetic SM flows. Lagrangian drifters indicate local dispersion in the surface ocean layer at horizontal scales smaller than 10 km, which confirms the presence of active submesoscale dynamics. Features at these scales give rise to lateral diffusivities (in the range 1–103 m2 s−1) of similar range to values inferred in the midlatitudes. Velocity structure functions present an energy-cascade inertial range at submesoscales with indication of a transition to a forward energy cascade at scales smaller than 1 km confirming the transition to 3-D turbulence. The active SM flow-field drives enhanced lateral and vertical fluxes in the Arctic Ocean mixed layer, which has first-order implications to the transport of heat, sea-ice floes, nutrients, and contaminants. © 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/114208
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geology and Geophysics, Yale University, New Haven, CT, United States; Russian State Hydrometeorological University, St. Petersburg, Russian Federation; Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation; Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC, Canada; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
Recommended Citation:
Mensa J.A.,Timmermans M.-L.,Kozlov I.E.,et al. Surface Drifter Observations From the Arctic Ocean's Beaufort Sea: Evidence for Submesoscale Dynamics[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)