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DOI | 10.5194/acp-20-29-2020 |
Modelling the relationship between liquid water content and cloud droplet number concentration observed in low clouds in the summer Arctic and its radiative effects | |
Dionne, Joelle1; von Salzen, Knut2,3,4; Cole, Jason2; Mahmood, Rashed3,5; Leaitch, W. Richard2; Lesins, Glen1; Folkins, Ian1; Chang, Rachel Y. -W.1 | |
2020-01-02 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:1页码:29-43 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Spain |
英文摘要 | Low clouds persist in the summer Arctic with important consequences for the radiation budget. In this study, we simulate the linear relationship between liquid water content (LWC) and cloud droplet number concentration (CDNC) observed during an aircraft campaign based out of Resolute Bay, Canada, conducted as part of the Network on Climate and Aerosols: Addressing Key Uncertainties in Remote Canadian Environments study in July 2014. Using a single-column model, we find that autoconversion can explain the observed linear relationship between LWC and CDNC. Of the three autoconversion schemes we examined, the scheme using continuous drizzle (Khairoutdinov and Kogan, 2000) appears to best reproduce the observed linearity in the tenuous cloud regime (Mauritsen et al., 2011), while a scheme with a threshold for rain (Liu and Daum, 2004) best reproduces the linearity at higher CDNC. An offline version of the radiative transfer model used in the Canadian Atmospheric Model version 4.3 is used to compare the radiative effects of the modelled and observed clouds. We find that there is no significant difference in the upward longwave cloud radiative effect at the top of the atmosphere from the three autoconversion schemes (p = 0.05) but that all three schemes differ at p = 0.05 from the calculations based on observations. In contrast, the downward longwave and shortwave cloud radiative effect at the surface for the Wood (2005b) and Khairoutdinov and Kogan (2000) schemes do not differ significantly (p = 0.05) from the observation-based radiative calculations, while the Liu and Daum (2004) scheme differs significantly from the observation-based calculation for the downward shortwave but not the downward longwave fluxes. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000505676400003 |
WOS关键词 | BOUNDARY-LAYER CLOUDS ; PART I ; OPTICAL-PROPERTIES ; ANNUAL CYCLE ; AEROSOL ; CLIMATE ; PARAMETERIZATION ; MICROPHYSICS ; ALBEDO ; SENSITIVITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/278543 |
专题 | 地球科学 |
作者单位 | 1.Dalhousie Univ, Phys & Atmospher Sci Dept, Halifax, NS, Canada; 2.Environm & Climate Change Canada, Sci & Technol Branch, Climate Res Div, Toronto, ON, Canada; 3.Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC, Canada; 4.Univ British Columbia, Earth Ocean & Atmospher Sci Dept, Vancouver, BC, Canada; 5.Barcelona Supercomp Ctr, Barcelona, Spain |
推荐引用方式 GB/T 7714 | Dionne, Joelle,von Salzen, Knut,Cole, Jason,et al. Modelling the relationship between liquid water content and cloud droplet number concentration observed in low clouds in the summer Arctic and its radiative effects[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(1):29-43. |
APA | Dionne, Joelle.,von Salzen, Knut.,Cole, Jason.,Mahmood, Rashed.,Leaitch, W. Richard.,...&Chang, Rachel Y. -W..(2020).Modelling the relationship between liquid water content and cloud droplet number concentration observed in low clouds in the summer Arctic and its radiative effects.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(1),29-43. |
MLA | Dionne, Joelle,et al."Modelling the relationship between liquid water content and cloud droplet number concentration observed in low clouds in the summer Arctic and its radiative effects".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.1(2020):29-43. |
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