| DOI: | 10.1007/s10584-016-1772-4
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| Scopus记录号: | 2-s2.0-84984846221
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| 论文题名: | The transformation of Arctic clouds with warming |
| 作者: | Ridley J.K.; Ringer M.A.; Sheward R.M.
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| 刊名: | Climatic Change
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| ISSN: | 0165-0009
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| EISSN: | 1573-1480
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| 出版年: | 2016
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| 卷: | 139, 期:2 | | 起始页码: | 325
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| 结束页码: | 337
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| 语种: | 英语
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| Scopus关键词: | Aerosols
; Atmospheric aerosols
; Atmospheric chemistry
; Boundary layers
; Budget control
; Carbon dioxide
; Climate models
; Condensation
; Earth (planet)
; Sea ice
; Solar radiation
; Sulfur compounds
; Cloud condensation nuclei
; Cloud microphysics
; Dimethyl sulphide
; Earth system model
; Global climate model
; Sulphate aerosol
; Surface emissions
; Surface radiation budget
; Ice
; aerosol
; atmospheric chemistry
; boundary layer
; carbon dioxide
; climate modeling
; cloud condensation nucleus
; cloud microphysics
; dimethylsulfide
; global climate
; hypothesis testing
; radiation budget
; rainfall
; sea ice
; stratification
; sulfate
; volcanic cloud
; wet deposition
; Arctic Ocean
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| 英文摘要: | The progressive loss of Arctic sea ice leads to increased surface emissions of Dimethyl Sulphide (DMS), which is the dominant local source of sulphate aerosols. We test the hypothesis that cloud condensation nuclei, derived from DMS, will increase cloud-top albedo in an earth-system global climate model. The earth-system model includes fully interactive ocean biology, DMS, atmospheric chemistry, aerosols and cloud microphysics. In an idealised warming scenario, the Arctic Ocean becomes ice-free in summer when atmospheric CO2 is increased by 1 % per year to four times the pre-industrial concentrations. The summer boundary layer near-surface inversion strengthens, increasing stratification with warming, whilst the autumn inversion weakens. We find that the dominant change in cloud albedo arises from the conversion of summer clouds from ice to liquid, reducing the solar flux at the surface by 27 W m−2. Only 1–2 W m−2 of the reduced solar flux is attributed to cloud condensation nuclei associated with sulphate aerosols derived from the 2–5 fold increase in DMS emissions that results from an ice-free ocean. We conclude that aerosol-cloud feedbacks originating from DMS production in the Arctic region are largely mitigated through increased wet deposition of sulphate aerosols by rainfall and as a result are not a significant component of changes in the surface radiation budget in our model. © 2016, Crown Copyright. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/84167
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| Appears in Collections: | 气候减缓与适应
气候变化事实与影响
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作者单位: | Met Office, FitzRoy Road, Exeter, United Kingdom; Institute of Geosciences, Goethe University Frankfurt, Altenhöferallee 1, Frankfurt am Main, Germany
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| Recommended Citation: | |
Ridley J.K.,Ringer M.A.,Sheward R.M.. The transformation of Arctic clouds with warming[J]. Climatic Change,2016-01-01,139(2)
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