| DOI: | 10.1175/2011JCLI4071.1
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| Scopus记录号: | 2-s2.0-84858163329
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| 论文题名: | Spatial variation in turbulent heat fluxes in Drake Passage |
| 作者: | Jiang C.; Gille S.T.; Sprintall J.; Yoshimura K.; Kanamitsu M.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2012
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| 卷: | 25, 期:5 | | 起始页码: | 1470
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| 结束页码: | 1488
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| 语种: | 英语
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| Scopus关键词: | Air sea flux
; Air temperature
; Air-sea temperature difference
; Baroclinic
; Decorrelations
; Down-scaling
; Drake passage
; Flux product
; Frequency spectra
; Fronts
; High resolution
; Latent heating/cooling
; Length scale
; Operational products
; Polar Front
; Reanalysis
; Regional products
; Related variables
; Sea surface temperature (SST)
; Seasonal cycle
; Sensible and latent heat fluxes
; Sensible heat flux
; Shipboard measurements
; Southern ocean
; Spatial decorrelation
; Spatial scale
; Spatial variations
; Spectral peak
; State variables
; Tropical convection
; Turbulent heat fluxes
; Weather forecasts
; Wind speed
; Atmospheric temperature
; Temperature distribution
; Turbulence
; Weather forecasting
; Heat flux
; air temperature
; air-sea interaction
; atmospheric convection
; downscaling
; latent heat flux
; polar front
; sea surface temperature
; seasonal variation
; sensible heat flux
; spatial variation
; spectral analysis
; turbulence
; turbulent flow
; wind velocity
; Drake Passage
; Southern Ocean
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| 英文摘要: | High-resolution underway shipboard atmospheric and oceanic observations collected in Drake Passage from 2000 to 2009 are used to examine the spatial scales of turbulent heat fluxes and flux-related state variables. The magnitude of the seasonal cycle of sea surface temperature (SST) south of the Polar Front is found to be twice that north of the front, but the seasonal cycles of the turbulent heat fluxes show no differences on either side of the Polar Front. Frequency spectra of the turbulent heat fluxes and related variables are red, with no identifiable spectral peaks. SST and air temperature are coherent over a range of frequencies corresponding to periods between ~10h and 2 days, with SST leading air temperature. The spatial decorrelation length scales of the sensible and latent heat fluxes calculated from two-day transects are 65 ± 6 km and 80 ± 6 km, respectively. The scale of the sensible heat flux is consistent with the decorrelation scale for air-sea temperature differences (70 ± 6 km) rather than either SST (153 ± 2 km) or air temperature (138 ± 4 km) alone. These scales are dominated by the Polar Front. When the Polar Front region is excluded, the decorrelation scales are 10-20 km, consistent with the first baroclinic Rossby radius. These eddy scales are often unrepresented in the available gridded heat flux products. The Drake Passage shipmeasurements are comparedwith four recently available gridded turbulent heat flux products: theEuropean Centre for Medium-Range Weather Forecasts high-resolution operational product in support of the Year of Coordinated Observing Modeling and Forcasting Tropical Convection (ECMWF-YOTC), ECMWF interim reanalysis (ERA-Interim), the Drake Passage reanalysis downscaling (DPRD10) regional product, and the objectively analyzed air-sea fluxes (OAFlux). The decorrelation length scales of the air-sea temperature difference, wind speed, and turbulent heat fluxes from these four products are significantly larger than those determined from shipboard measurements. © 2012 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/52534
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States
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| Recommended Citation: | |
Jiang C.,Gille S.T.,Sprintall J.,et al. Spatial variation in turbulent heat fluxes in Drake Passage[J]. Journal of Climate,2012-01-01,25(5)
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