DOI: 10.1175/JCLI-D-14-00222.1
Scopus记录号: 2-s2.0-84919754212
论文题名: The surface diurnal warm layer in the Indian ocean during CINDY/DYNAMO
作者: Matthews A.J. ; Baranowski D.B. ; Heywood K.J. ; Flatau P.J. ; Schmidtko S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 24 起始页码: 9101
结束页码: 9122
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Experiments
; Solar radiation
; Sun
; Surface waters
; Wind effects
; Atmosphere-ocean interactions
; Diurnal effects
; Indian ocean
; Intraseasonal variability
; Madden-Julian oscillation
; Oceanography
; aerial survey
; air-sea interaction
; atmosphere-ocean coupling
; diurnal variation
; error analysis
; Madden-Julian oscillation
; sea surface temperature
; temperature anomaly
; temperature gradient
; warm pool
; wind velocity
; Indian Ocean
英文摘要: A surface diurnal warm layer is diagnosed from Seaglider observations and develops on half of the days in the Cooperative Indian Ocean Experiment on Intraseasonal Variability/Dynamics of theMadden-JulianOscillation (CINDY/DYNAMO) Indian Ocean experiment. The diurnal warm layer occurs on days of high solar radiation flux (>80W m-2) and low wind speed (<6ms-1) and preferentially in the inactive stage of the Madden-Julian oscillation. Its diurnal harmonic has an exponential vertical structure with a depth scale of 4-5m (dependent on chlorophyll concentration), consistent with forcing by absorption of solar radiation. The effective sea surface temperature (SST) anomaly due to the diurnal warm layer often reaches 0.8°C in the afternoon, with a daily mean of 0.2°C, rectifying the diurnal cycle onto longer time scales. This SST anomaly drives an anomalous flux of 4W m-2 that cools the ocean. Alternatively, in a climatemodel where this process is unresolved, this represents an erroneous flux that warms the ocean.Asimplemodel predicts a diurnal warm layer to occur on 30%-50% of days across the tropical warm pool. On the remaining days, with low solar radiation and high wind speeds, a residual diurnal cycle is observed by the Seaglider, with a diurnal harmonic of temperature that decreases linearly with depth. As wind speed increases, this already weak temperature gradient decreases further, tending toward isothermal conditions. © 2014 American Meteorological Society. 资助项目: CSIR, National Aeronautics and Space Administration
; NASA, National Aeronautics and Space Administration
; NOAA, National Aeronautics and Space Administration
; OAR, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51303
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; School of Mathematics, University of East Anglia, Norwich, United Kingdom; Institute of Geophysics, Faculty of Physics, University of Warsaw, Warsaw, Poland; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
Recommended Citation:
Matthews A.J.,Baranowski D.B.,Heywood K.J.,et al. The surface diurnal warm layer in the Indian ocean during CINDY/DYNAMO[J]. Journal of Climate,2014-01-01,27(24)