Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
| An empirical model for surface wind stress response to SST forcing induced by tropical Instability waves (TIWs) in the eastern equatorial Pacific | |
Zhang Ronghua ; Busalacchi Antonio J.
| |
| 2009-06 | |
| 发表期刊 | MONTHLY WEATHER REVIEW
 |
| 卷号 | 137期号:6页码:2021-2046 |
| 摘要 | High-resolution space-based observations reveal significant two-way air-sea interactions associated with tropical instability waves (TIWs); their roles in budgets of heat, salt, momentum, and biogeochemical fields in the tropical oceans have been recently demonstrated. However, dynamical model-based simulations of the atmospheric response to TIW-induced sea surface temperature (SST(TIW)) perturbations remain a great challenge because of the limitation in spatial resolution and realistic representations of the related processes in the atmospheric planetary boundary layer (PBL) and their interactions with the overlying free troposphere. Using microwave remote sensing data, an empirical model is derived to depict wind stress perturbations induced by TIW-related SST forcing in the eastern tropical Pacific Ocean. Wind data are based on space-time blending of Quick Scatterometer (QuikSCAT) Direction Interval Retrieval with Thresholded Nudging (DIRTH) satellite observations and NCEP analysis fields; SST data are from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI). These daily data are first subject to a spatial filter of 12 degrees moving average in the zonal direction to extract TIW-related wind stress (tau(TIW)) and SST(TIW) perturbations. A combined singular value decomposition (SVD) analysis is then applied to these zonal high-pass-filtered tau(TIW) and SST(TIW) fields. It is demonstrated that the SVD-based analysis technique can effectively extract TIW-induced covariability patterns in the atmosphere and ocean, acting as a filter by passing wind signals that are directly related with the SSTTIW forcing over the TIW active regions. As a result, the empirical model can well represent TIW-induced wind stress responses as revealed directly from satellite measurements (e. g., the structure and phase), but the amplitude can be underestimated significantly. Validation and sensitivity experiments are performed to illustrate the robustness of the empirical tTIW model. Further applications are discussed for taking into account the TIW-induced wind responses and feedback effects that are missing in large-scale climate models and atmospheric reanalysis data, as well as for uncoupled ocean and coupled mesoscale and large-scale air-sea modeling studies. |
| 关键词 | Numerical Weather Prediction Intermediate Coupled Model Ocean-atmosphere Model Interannual Variability Satellite Measurements Heat-budget Long Waves Temperature Simulations Impact |
| 收录类别 | SCI |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/18181 |
| 专题 | 海洋环流与波动重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang Ronghua,Busalacchi Antonio J.. An empirical model for surface wind stress response to SST forcing induced by tropical Instability waves (TIWs) in the eastern equatorial Pacific[J]. MONTHLY WEATHER REVIEW,2009,137(6):2021-2046. |
| APA | Zhang Ronghua,&Busalacchi Antonio J..(2009).An empirical model for surface wind stress response to SST forcing induced by tropical Instability waves (TIWs) in the eastern equatorial Pacific.MONTHLY WEATHER REVIEW,137(6),2021-2046. |
| MLA | Zhang Ronghua,et al."An empirical model for surface wind stress response to SST forcing induced by tropical Instability waves (TIWs) in the eastern equatorial Pacific".MONTHLY WEATHER REVIEW 137.6(2009):2021-2046. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| An Empirical Model f（6229KB） | 限制开放 | CC BY-NC-SA | 浏览 | |||
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