Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0153.1 |
Understanding the Equatorial Pacific Cold Tongue Time-Mean Heat Budget. Part II: Evaluation of the GFDL-FLOR Coupled GCM | |
Ray, Sulagna1; Wittenberg, Andrew T.2; Griffies, Stephen M.2; Zeng, Fanrong2 | |
2018-12-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:24页码:9987-10011 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The heat budget of the Pacific equatorial cold tongue (ECT) is explored using the GFDL-FLOR coupled GCM (the forecast-oriented low ocean resolution version of CM2.5) and ocean reanalyses, leveraging the two-layer framework developed in Part I. Despite FLOR's relatively weak meridional stirring by tropical instability waves (TIWs), the model maintains a reasonable SST and thermocline depth in the ECT via two compensating biases: 1) enhanced monthly-scale vertical advective cooling below the surface mixed layer (SML), due to overly cyclonic off-equatorial wind stress that acts to cool the equatorial source waters; and 2) an excessive SST contrast between the ECT and off-equator areas, which boosts the equatorward heat transport by TIWs. FLOR's strong advective cooling at the SML base is compensated by strong downward diffusion of heat out of the SML, which then allows FLOR's ECT to take up a realistic heat flux from the atmosphere. Correcting FLOR's climatological SST and wind stress biases via flux adjustment (FA) leads to weaker deep advective cooling of the ECT, which then erodes the upper-ocean thermal stratification, enhances vertical mixing, and excessively deepens the thermocline. FA does strengthen FLOR's meridional shear of the zonal currents in the east Pacific, but this does not amplify either the simulated TIWs or their equatorward heat transport, likely due to FLOR's coarse zonal ocean resolution. The analysis suggests that to advance coupled simulations of the ECT, improved winds and surface heat fluxes must go hand in hand with improved subseasonal and parameterized ocean processes. Implications for model development and the tropical Pacific observing system are discussed. |
英文关键词 | Atmosphere-ocean interaction ENSO Fluxes Heat budgets fluxes Climate models Parameterization |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450565300004 |
WOS关键词 | TROPICAL INSTABILITY WAVES ; GENERAL-CIRCULATION MODELS ; SEA-SURFACE TEMPERATURE ; SEASONAL CYCLE ; CLIMATE MODELS ; EL-NINO ; DATA ASSIMILATION ; OCEAN ; IMPACT ; VARIABILITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/20029 |
专题 | 气候变化 |
作者单位 | 1.Princeton Univ, Atmospher & Ocean Sci Program, Princeton, NJ 08544 USA; 2.NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA |
推荐引用方式 GB/T 7714 | Ray, Sulagna,Wittenberg, Andrew T.,Griffies, Stephen M.,et al. Understanding the Equatorial Pacific Cold Tongue Time-Mean Heat Budget. Part II: Evaluation of the GFDL-FLOR Coupled GCM[J]. JOURNAL OF CLIMATE,2018,31(24):9987-10011. |
APA | Ray, Sulagna,Wittenberg, Andrew T.,Griffies, Stephen M.,&Zeng, Fanrong.(2018).Understanding the Equatorial Pacific Cold Tongue Time-Mean Heat Budget. Part II: Evaluation of the GFDL-FLOR Coupled GCM.JOURNAL OF CLIMATE,31(24),9987-10011. |
MLA | Ray, Sulagna,et al."Understanding the Equatorial Pacific Cold Tongue Time-Mean Heat Budget. Part II: Evaluation of the GFDL-FLOR Coupled GCM".JOURNAL OF CLIMATE 31.24(2018):9987-10011. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论