Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0842.1 |
Cloud Radiative Feedbacks and El Nino-Southern Oscillation | |
Middlemas, Eleanor A.1; Clement, Amy C.1; Medeiros, Brian2; Kirtman, Ben1 | |
2019-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:15页码:4661-4680 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Cloud radiative feedbacks are disabled via "cloud-locking" in the Community Earth System Model, version 1.2 (CESM1.2), to result in a shift in El Nino-Southern Oscillation (ENSO) periodicity from 2-7 years to decadal time scales. We hypothesize that cloud radiative feedbacks may impact the periodicity in three ways: by 1) modulating heat flux locally into the equatorial Pacific subsurface through negative shortwave cloud feedback on sea surface temperature anomalies (SSTA), 2) damping the persistence of subtropical southeast Pacific SSTA such that the South Pacific meridional mode impacts the duration of ENSO events, or 3) controlling the meridional width of off-equatorial westerly winds, which impacts the periodicity of ENSO by initiating longer Rossby waves. The result of cloud-locking in CESM1.2 contrasts that of another study, which found that cloud-locking in a different global climate model led to decreased ENSO magnitude across all time scales due to a lack of positive longwave feedback on the anomalous Walker circulation. CESM1.2 contains this positive longwave feedback on the anomalous Walker circulation, but either its influence on the surface is decoupled from ocean dynamics or the feedback is only active on interannual time scales. The roles of cloud radiative feedbacks in ENSO in other global climate models are additionally considered. In particular, it is shown that one cannot predict the role of cloud radiative feedbacks in ENSO through a multimodel diagnostic analysis. Instead, they must be directly altered. |
英文关键词 | Tropics Convection ENSO Walker circulation Cloud radiative effects |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000473526600001 |
WOS关键词 | GENERAL-CIRCULATION MODEL ; PACIFIC MERIDIONAL MODE ; ATMOSPHERE FEEDBACKS ; ENSO ; CLIMATE ; OCEAN ; TEMPERATURE ; AMPLIFICATION ; VARIABILITY ; CONVECTION |
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/185708 |
专题 | 气候变化 |
作者单位 | 1.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33146 USA; 2.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Middlemas, Eleanor A.,Clement, Amy C.,Medeiros, Brian,et al. Cloud Radiative Feedbacks and El Nino-Southern Oscillation[J]. JOURNAL OF CLIMATE,2019,32(15):4661-4680. |
APA | Middlemas, Eleanor A.,Clement, Amy C.,Medeiros, Brian,&Kirtman, Ben.(2019).Cloud Radiative Feedbacks and El Nino-Southern Oscillation.JOURNAL OF CLIMATE,32(15),4661-4680. |
MLA | Middlemas, Eleanor A.,et al."Cloud Radiative Feedbacks and El Nino-Southern Oscillation".JOURNAL OF CLIMATE 32.15(2019):4661-4680. |
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