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DOI | 10.1007/s00382-019-05030-6 |
Tropical climate variability in the Community Earth System Model: Data Assimilation Research Testbed | |
Eliashiv, Jonathan1; Subramanian, Aneesh C.1,2,3; Miller, Arthur J.1 | |
2019-12-03 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | USA; England |
英文摘要 | A new prototype coupled ocean-atmosphere Ensemble Kalman Filter reanalysis product, the Community Earth System Model using the Data Assimilation Research Testbed (CESM-DART), is studied by comparing its tropical climate variability to other reanalysis products, available observations, and a free-running version of the model. The results reveal that CESM-DART produces fields that are comparable in overall performance with those of four other uncoupled and coupled reanalyses. The clearest signature of differences in CESM-DART is in the analysis of the Madden-Julian Oscillation (MJO) and other tropical atmospheric waves. MJO energy is enhanced over the free-running CESM as well as compared to the other products, suggesting the importance of the surface flux coupling at the ocean-atmosphere interface in organizing convective activity. In addition, high-frequency Kelvin waves in CESM-DART are reduced in amplitude compared to the free-running CESM run and the other products, again supportive of the oceanic coupling playing a role in this difference. CESM-DART also exhibits a relatively low bias in the mean tropical precipitation field and mean sensible heat flux field. Conclusive evidence of the importance of coupling on data assimilation performance will require additional detailed direct comparisons with identically formulated, uncoupled data assimilation runs. |
英文关键词 | CESM Data Assimilation Tropical Variability Madden-Julian Oscillation DART Ensemble Kalman Filter |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500468700001 |
WOS关键词 | COUPLED EQUATORIAL WAVES ; REANALYSIS ; FRAMEWORK |
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/224307 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 2.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA; 3.Univ Oxford, Dept Phys, Oxford, England |
推荐引用方式 GB/T 7714 | Eliashiv, Jonathan,Subramanian, Aneesh C.,Miller, Arthur J.. Tropical climate variability in the Community Earth System Model: Data Assimilation Research Testbed[J]. CLIMATE DYNAMICS,2019. |
APA | Eliashiv, Jonathan,Subramanian, Aneesh C.,&Miller, Arthur J..(2019).Tropical climate variability in the Community Earth System Model: Data Assimilation Research Testbed.CLIMATE DYNAMICS. |
MLA | Eliashiv, Jonathan,et al."Tropical climate variability in the Community Earth System Model: Data Assimilation Research Testbed".CLIMATE DYNAMICS (2019). |
条目包含的文件 | 条目无相关文件。 |
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