Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027443 |
Drivers of Seasonal Variability in Marine Boundary Layer Aerosol Number Concentration Investigated Using a Steady State Approach | |
Mohrmann, Johannes1; Wood, Robert1; McGibbon, Jeremy1; Eastman, Ryan1; Luke, Edward2 | |
2018-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:2页码:1097-1112 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Marine boundary layer (MBL) aerosol particles affect the climate through their interaction with MBL clouds. Although both MBL clouds and aerosol particles have pronounced seasonal cycles, the factors controlling seasonal variability of MBL aerosol particle concentration are not well constrained. In this paper an aerosol budget is constructed representing the effects of wet deposition, free-tropospheric entrainment, primary surface sources, and advection on the MBL accumulation mode aerosol number concentration (N-a). These terms are then parameterized, and by assuming that on seasonal time scales N-a is in steady state, the budget equation is rearranged to form a diagnostic equation for N-a based on observable variables. Using data primarily collected in the subtropical northeast Pacific during the MAGIC campaign (Marine ARM (Atmospheric Radiation Measurement) GPCI (GCSS Pacific Cross-Section Intercomparison) Investigation of Clouds), estimates of both mean summer and winter N-a concentrations are made using the simplified steady state model and seasonal mean observed variables. These are found to match well with the observed N-a. To attribute the modeled difference between summer and winter aerosol concentrations to individual observed variables (e.g., precipitation rate and free-tropospheric aerosol number concentration), a local sensitivity analysis is combined with the seasonal difference in observed variables. This analysis shows that despite wintertime precipitation frequency being lower than summer, the higher winter precipitation rate accounted for approximately 60% of the modeled seasonal difference in N-a, which emphasizes the importance of marine stratocumulus precipitation in determining MBL aerosol concentrations on longer time scales. |
英文关键词 | marine boundary layer aerosol aerosol variability aerosol budget aerosol-precipitation interactions |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425520200028 |
WOS关键词 | CLOUD CONDENSATION NUCLEI ; NORTHEAST PACIFIC ; STRATOCUMULUS ; ATMOSPHERE ; DRIZZLE ; MODEL ; RAIN ; SUSCEPTIBILITY ; REPRESENTATION ; ENTRAINMENT |
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/33147 |
专题 | 气候变化 |
作者单位 | 1.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 2.Brookhaven Natl Lab, Upton, NY 11973 USA |
推荐引用方式 GB/T 7714 | Mohrmann, Johannes,Wood, Robert,McGibbon, Jeremy,et al. Drivers of Seasonal Variability in Marine Boundary Layer Aerosol Number Concentration Investigated Using a Steady State Approach[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(2):1097-1112. |
APA | Mohrmann, Johannes,Wood, Robert,McGibbon, Jeremy,Eastman, Ryan,&Luke, Edward.(2018).Drivers of Seasonal Variability in Marine Boundary Layer Aerosol Number Concentration Investigated Using a Steady State Approach.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(2),1097-1112. |
MLA | Mohrmann, Johannes,et al."Drivers of Seasonal Variability in Marine Boundary Layer Aerosol Number Concentration Investigated Using a Steady State Approach".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.2(2018):1097-1112. |
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