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DOI | 10.1029/2019JD031832 |
A La Nina-Like Climate Response to South African Biomass Burning Aerosol in CESM Simulations | |
Amiri-Farahani, Anahita1,2,3; Allen, Robert J.3; Li, King-Fai2; Nabat, Pierre4; Westervelt, Daniel M.5 | |
2020-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | The climate response to atmospheric aerosols, including their effects on dominant modes of climate variability like El Nino-Southern Oscillation (ENSO), remains highly uncertain. This is due to several sources of uncertainty, including aerosol emission, transport, removal, vertical distribution, and radiative properties. Here, we conduct coupled ocean-atmosphere simulations with two versions of the Community Earth System Model (CESM) driven by semiempirical fine-mode aerosol direct radiative effects without dust and sea salt. Aerosol atmospheric heating off the west coast of Africa-most of which is due to biomass burning-leads to a significant atmospheric dynamical response, including localized ascent and upper-level divergence. Coupled Model Intercomparison Project version 6 (CMIP6) biomass burning simulations support this response. Moreover, CESM shows that the anomalous aerosol heating in the Atlantic triggers an atmospheric teleconnection to the tropical Pacific, including strengthening of the Walker circulation. The easterly trade winds accelerate, and through coupled ocean-atmosphere processes and the Bjerknes feedback, a La Nina-like response develops. Observations also support a relationship between south African biomass burning emissions and ENSO, with La Nina events preceding strong south African biomass burning in boreal fall. Our simulations suggest a possible two-way feedback between ENSO and south African biomass burning, with La Nina promoting more biomass burning emissions, which may then strengthen the developing La Nina. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529111600026 |
WOS关键词 | DELTA-EDDINGTON APPROXIMATION ; GLOBAL FIRE EMISSIONS ; BLACK CARBON ; NORTHERN-HEMISPHERE ; ANTHROPOGENIC AEROSOLS ; TROPOSPHERIC AEROSOLS ; VERTICAL-DISTRIBUTION ; ABSORBING AEROSOLS ; RADIATIVE-TRANSFER ; OPTICAL-PROPERTIES |
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/280143 |
专题 | 气候变化 |
作者单位 | 1.Univ Michigan, Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA; 2.Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA; 3.Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA; 4.CNRS, UMR3589, Meteo France, Ctr Natl Rech Meteorol, Toulouse, France; 5.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA |
推荐引用方式 GB/T 7714 | Amiri-Farahani, Anahita,Allen, Robert J.,Li, King-Fai,et al. A La Nina-Like Climate Response to South African Biomass Burning Aerosol in CESM Simulations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(6). |
APA | Amiri-Farahani, Anahita,Allen, Robert J.,Li, King-Fai,Nabat, Pierre,&Westervelt, Daniel M..(2020).A La Nina-Like Climate Response to South African Biomass Burning Aerosol in CESM Simulations.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(6). |
MLA | Amiri-Farahani, Anahita,et al."A La Nina-Like Climate Response to South African Biomass Burning Aerosol in CESM Simulations".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.6(2020). |
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