DOI: 10.1175/2011JCLI4211.1
Scopus记录号: 2-s2.0-84856957194
论文题名: Probability distribution characteristics for surface air-sea turbulent heat fluxes over the global ocean
作者: Gulev S.K. ; Belyaev K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 1 起始页码: 184
结束页码: 206
语种: 英语
Scopus关键词: Decadal timescale
; Distribution characteristics
; Global ocean
; Heat budget
; Interannual
; Interannual variability
; Kuroshio Extension
; Location and scale parameters
; Ocean dynamics
; Probability density distribution
; Reanalysis
; Sampling errors
; Seasonal cycle
; Southern Ocean
; State variables
; Surface flux
; Surface fluxes
; Surface turbulent fluxes
; Systematic effects
; Turbulent flux
; Turbulent heat fluxes
; Voluntary observing ships
; Western boundary currents
; Climatology
; Ocean currents
; Probability distributions
; Surface measurement
; Turbulence
; Heat flux
; air-sea interaction
; annual variation
; climatology
; heat budget
; heat flux
; latent heat flux
; parameterization
; probability
; sensible heat flux
; turbulent mixing
; Kuroshio Extension
; Pacific Ocean
; Southern Ocean
英文摘要: To analyze the probability density distributions of surface turbulent heat fluxes, the authors apply the two-parametric modified Fisher-Tippett (MFT) distribution to the sensible and latent turbulent heat fluxes recomputed from 6-hourly NCEP-NCAR reanalysis state variables for the period from 1948 to 2008. They derived the mean climatology and seasonal cycle of the location and scale parameters of the MFT distribution. Analysis of the parameters of probability distributions identified the areas where similar surface turbulent fluxes are determined by the very different shape of probability density functions. Estimated extreme turbulent heat fluxes amount to 1500-2000 W m -2 (for the 99th percentile) and can exceed 2000 W m -2 for higher percentiles in the subpolar latitudes and western boundary current regions. Analysis of linear trends and interannual var- iability in the mean and extreme fluxes shows that the strongest trends in extreme fluxes (more than 15 W m -2 decade -1) in the western boundary current regions are associated with the changes in the shape of distribution. In many regions changes in extreme fluxes may be different from those for the mean fluxes at interannual and decadal time scales. The correlation between interannual variability of the mean and extreme fluxes is relatively low in the tropics, the Southern Ocean, and the Kuroshio Extension region. Analysis of probability distributions in turbulent fluxes has also been used in assessing the impact of sampling errors in the Voluntary Observing Ship (VOS)-based surface flux climatologies, allowed for the estimation of the impact of sampling in extreme fluxes. Although sampling does not have a visible systematic effect on mean fluxes, sampling uncertainties result in the underestimation of extreme flux values exceeding 100 W m -2 in poorly sampled regions. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52622
Appears in Collections: 气候变化事实与影响
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作者单位: P. P. Shirshov Institute of Oceanology, Moscow State University, Moscow, Russian Federation; Institut für Meereskunde-GEOMAR, Kiel, Germany; Department of Mathematics, University of Bahia, Salvador, Brazil
Recommended Citation:
Gulev S.K.,Belyaev K.. Probability distribution characteristics for surface air-sea turbulent heat fluxes over the global ocean[J]. Journal of Climate,2012-01-01,25(1)