Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072884 |
Importance of ocean mesoscale variability for air-sea interactions in the Gulf of Mexico | |
Putrasahan, D. A.1,2; Kamenkovich, I.1; Le Henaff, M.3,4; Kirtman, B. P.1 | |
2017-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Mesoscale variability of currents in the Gulf of Mexico (GoM) can affect oceanic heat advection and air-sea heat exchanges, which can influence climate extremes over North America. This study is aimed at understanding the influence of the oceanic mesoscale variability on the lower atmosphere and air-sea heat exchanges. The study contrasts global climate model (GCM) with 0.1 degrees ocean resolution (high resolution; HR) with its low-resolution counterpart (1 degrees ocean resolution with the same 0.5 degrees atmosphere resolution; LR). The LR simulation is relevant to current generation of GCMs that are still unable to resolve the oceanic mesoscale. Similar to observations, HR exhibits positive correlation between sea surface temperature (SST) and surface turbulent heat flux anomalies, while LR has negative correlation. For HR, we decompose lateral advective heat fluxes in the upper ocean into mean (slowly varying) and mesoscale-eddy (fast fluctuations) components. We find that the eddy flux divergence/convergence dominates the lateral advection and correlates well with the SST anomalies and air-sea latent heat exchanges. This result suggests that oceanic mesoscale advection supports warm SST anomalies that in turn feed surface heat flux. We identify anticyclonic warm-core circulation patterns (associated Loop Current and rings) which have an average diameter of similar to 350 km. These warm anomalies are sustained by eddy heat flux convergence at submonthly time scales and have an identifiable imprint on surface turbulent heat flux, atmospheric circulation, and convective precipitation in the northwest portion of an averaged anticyclone. |
英文关键词 | ocean mesoscale variability eddy flux convergence air-sea interactions Gulf of Mexico coupled climate model |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405854200055 |
WOS关键词 | HEMISPHERE WARM POOL ; LOOP CURRENT METRICS ; SURFACE TEMPERATURE ; WESTERN-HEMISPHERE ; INTERANNUAL VARIABILITY ; HURRICANES KATRINA ; EDDIES ; IMPACT ; CLIMATE ; WIND |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27685 |
专题 | 气候变化 |
作者单位 | 1.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Coral Gables, FL 33124 USA; 2.Max Planck Inst Meteorol, Hamburg, Germany; 3.Univ Miami, Cooperat Inst Marine & Atmospher Studies, Coral Gables, FL 33124 USA; 4.NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA |
推荐引用方式 GB/T 7714 | Putrasahan, D. A.,Kamenkovich, I.,Le Henaff, M.,et al. Importance of ocean mesoscale variability for air-sea interactions in the Gulf of Mexico[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(12). |
APA | Putrasahan, D. A.,Kamenkovich, I.,Le Henaff, M.,&Kirtman, B. P..(2017).Importance of ocean mesoscale variability for air-sea interactions in the Gulf of Mexico.GEOPHYSICAL RESEARCH LETTERS,44(12). |
MLA | Putrasahan, D. A.,et al."Importance of ocean mesoscale variability for air-sea interactions in the Gulf of Mexico".GEOPHYSICAL RESEARCH LETTERS 44.12(2017). |
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