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DOI | 10.1007/s00382-016-3516-6 |
How do uncertainties in NCEP R2 and CFSR surface fluxes impact tropical ocean simulations? | |
Wen, Caihong1,2; Xue, Yan1; Kumar, Arun1; Behringer, David3; Yu, Lisan4 | |
2017-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | NCEP/DOE reanalysis (R2) and Climate Forecast System Reanalysis (CFSR) surface fluxes are widely used by the research community to understand surface flux climate variability, and to drive ocean models as surface forcings. However, large discrepancies exist between these two products, including (1) stronger trade winds in CFSR than in R2 over the tropical Pacific prior 2000; (2) excessive net surface heat fluxes into ocean in CFSR than in R2 with an increase in difference after 2000. The goals of this study are to examine the sensitivity of ocean simulations to discrepancies between CFSR and R2 surface fluxes, and to assess the fidelity of the two products. A set of experiments, where an ocean model was driven by a combination of surface flux components from R2 and CFSR, were carried out. The model simulations were contrasted to identify sensitivity to different component of the surface fluxes in R2 and CFSR. The accuracy of the model simulations was validated against the tropical moorings data, altimetry SSH and SST reanalysis products. Sensitivity of ocean simulations showed that temperature bias difference in the upper 100 m is mostly sensitive to the differences in surface heat fluxes, while depth of 20 A degrees C (D20) bias difference is mainly determined by the discrepancies in momentum fluxes. D20 simulations with CFSR winds agree with observation well in the western equatorial Pacific prior 2000, but have large negative bias similar to those with R2 winds after 2000, partly because easterly winds over the central Pacific were underestimated in both CFSR and R2. On the other hand, the observed temperature variability is well reproduced in the tropical Pacific by simulations with both R2 and CFSR fluxes. Relative to the R2 fluxes, the CFSR fluxes improve simulation of interannual variability in all three tropical oceans to a varying degree. The improvement in the tropical Atlantic is most significant and is largely attributed to differences in surface winds. |
英文关键词 | CFSR NCEP/DOE reanalysis (R2) Surface wind stress/heat flux validation Ocean model Tropical moored buoy data |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414153800023 |
WOS关键词 | EQUATORIAL PACIFIC-OCEAN ; HEAT FLUXES ; PART I ; SEA-LEVEL ; CLIMATE ; REANALYSIS ; MODEL ; CIRCULATION ; ATLANTIC ; SYSTEM |
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/35901 |
专题 | 气候变化 |
作者单位 | 1.NOAA NWS NCEP Climate Predict Ctr, 5830 Univ Res Court, College Pk, MD 20740 USA; 2.Innovim, Greenbelt, MD 20770 USA; 3.NCEP NWS NOAA, Environm Modeling Ctr, College Pk, MD USA; 4.Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA |
推荐引用方式 GB/T 7714 | Wen, Caihong,Xue, Yan,Kumar, Arun,et al. How do uncertainties in NCEP R2 and CFSR surface fluxes impact tropical ocean simulations?[J]. CLIMATE DYNAMICS,2017,49. |
APA | Wen, Caihong,Xue, Yan,Kumar, Arun,Behringer, David,&Yu, Lisan.(2017).How do uncertainties in NCEP R2 and CFSR surface fluxes impact tropical ocean simulations?.CLIMATE DYNAMICS,49. |
MLA | Wen, Caihong,et al."How do uncertainties in NCEP R2 and CFSR surface fluxes impact tropical ocean simulations?".CLIMATE DYNAMICS 49(2017). |
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