DOI: 10.1175/JCLI-D-15-0489.1
Scopus记录号: 2-s2.0-84959455427
论文题名: In situ and satellite evaluation of air-sea flux variation near ocean temperature gradients
作者: Plagge A. ; Edson J.B. ; Vandemark D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 4 起始页码: 1583
结束页码: 1602
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Heat flux
; Meteorological instruments
; Ocean currents
; Surface waters
; Air-sea flux measurements
; Atmospheric stability
; Correlation coefficient
; Monin-Obukhov similarity theory
; Pressure gradient force
; Pressure perturbation
; Sea Surface Temperature gradients
; Turbulent heat fluxes
; Oceanography
; air-sea interaction
; atmosphere-ocean coupling
; atmospheric pressure
; in situ measurement
; pressure gradient
; satellite data
; sea surface temperature
; temperature gradient
; Atlantic Ocean
; Gulf Stream
英文摘要: Observations of ocean-atmosphere coupling across persistent mesoscale sea surface temperature (SST) gradients are used to examine the controls of atmospheric stability, pressure gradient force, and heat flux that are considered central to oft-observed coupling between wind and SST. Moored air-sea flux measurements near the Gulf Stream are combined with QuikSCAT satellite scatterometer equivalent neutral wind (ENW) data to assess correlations between SST, air-sea fluxes, pressure, and wind perturbations at scales of 10- 100 days. The net effect of ocean fronts meandering past the site enabled buoy observation of SST impacts on wind, with coupling coefficients of 0.3-0.5 similar to past studies. Wind stress-SST and ENW-SST correlation coefficients are slightly higher, and roughly 20% of the ENW perturbation is attributed to stratification impacts predicted by Monin-Obukhov (MO) similarity theory. Significantly higher correlation is observed when relating wind or stress perturbations to buoyant heat flux variation. Atmospheric pressure perturbation with SST of order 0.5 hPa 8C21 is observed, as well as high negative correlation between wind and pressure variations. Length and time scales associated with the coupling indicate that peak correlations occur at 50- 70 days and 300-500 km, consistent with mesoscale meander scales. Coupling coefficient values vary significantly depending on analysis time scale and exhibit a range near to recently observed interbasin variability. This variability is attributed to the extent of oceanic length scales permitted in the analysis. Together, results affirm the central role of SST-induced turbulent heat flux in controlling pressure field adjustments and thereby the wind perturbations over SST fronts. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50034
Appears in Collections: 气候变化事实与影响
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作者单位: Thayer School of Engineering, Dartmouth College, Lebanon, NH, United States; Department of Marine Sciences, University of Connecticut, Groton, CT, United States; Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Plagge A.,Edson J.B.,Vandemark D.. In situ and satellite evaluation of air-sea flux variation near ocean temperature gradients[J]. Journal of Climate,2016-01-01,29(4)