Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-7459-2017 |
Effects of the Wegener-Bergeron-Findeisen process on global black carbon distribution | |
Qi, Ling1,2; Li, Qinbin1,2; He, Cenlin1,2; Wang, Xin3; Huang, Jianping3 | |
2017-06-21 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
![]() |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | We systematically investigate the effects of Wegener-Bergeron-Findeisen process (hereafter WBF) on black carbon (BC) scavenging efficiency, surface BCair, deposition flux, concentration in snow (BCsnow, ng g(-1)), and washout ratio using a global 3-D chemical transport model (GEOS-Chem). We differentiate riming-versus WBF-dominated in-cloud scavenging based on liquid water content (LWC) and temperature. Specifically, we implement an implied WBF parameterization using either temperature or ice mass fraction (IMF) in mixed-phase clouds based on field measurements. We find that at Jungfraujoch, Switzerland, and Abisko, Sweden, where WBF dominates in-cloud scavenging, including the WBF effect strongly reduces the discrepancies of simulated BC scavenging efficiency and washout ratio against observations (from a factor of 3 to 10% and from a factor of 4-5 to a factor of 2). However, at Zeppelin, Norway, where riming dominates, simulation of BC scavenging efficiency, BCair, and washout ratio become worse (relative to observations) when WBF is included. There is thus an urgent need for extensive observations to distinguish and characterize riming-versus WBF-dominated aerosol scavenging in mixed-phase clouds and the associated BC scavenging efficiency. Our model results show that including the WBF effect lowers global BC scavenging efficiency, with a higher reduction at higher latitudes (8% in the tropics and up to 76% in the Arctic). The resulting annual mean BCair increases by up to 156% at high altitudes and at northern high latitudes because of lower temperature and higher IMF. Overall, WBF halves the model-observation discrepancy (from 65 to 30 %) of BCair across North America, Europe, China and the Arctic. Globally WBF increases BC burden from 0.22 to 0.29-0.35 mgm(-2) yr(-1), which partially explains the gap between observed and previous model-simulated BC burdens over land. In addition, WBF significantly increases BC lifetime from 5.7 to similar to 8 days. Additionally, WBF results in a significant redistribution of BC deposition in source and remote regions. Specifically, it lowers BC wet deposition (by 37-63% at northern mid-latitudes and by 21-29% in the Arctic), while it increases dry deposition (by 3-16% at mid-latitudes and by 81-159% in the Arctic). The resulting total BC deposition is lower at mid-latitudes (by 12-34 %) but higher in the Arctic (by 2-29 %). We find that WBF decreases BCsnow at mid-latitudes (by similar to 15 %) but increases it in the Arctic (by 26 %) while improving model comparisons with observations. In addition, WBF dramatically reduces the model-observation discrepancy of washout ratios in winter (from a factor of 16 to 4). The remaining discrepancies in BCair, BCsnow and BC washout ratios suggest that in-cloud removal in mixed-phased clouds is likely still excessive over land. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437933200001 |
WOS关键词 | MIXED-PHASE CLOUDS ; DRY DEPOSITION ; OBSERVATIONAL CONSTRAINTS ; ATMOSPHERIC AEROSOL ; HIPPO OBSERVATIONS ; ELEMENTAL CARBON ; SINGLE-PARTICLE ; SNOW ; ICE ; CLIMATE |
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/30366 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; 2.Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA USA; 3.Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Qi, Ling,Li, Qinbin,He, Cenlin,et al. Effects of the Wegener-Bergeron-Findeisen process on global black carbon distribution[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(12). |
APA | Qi, Ling,Li, Qinbin,He, Cenlin,Wang, Xin,&Huang, Jianping.(2017).Effects of the Wegener-Bergeron-Findeisen process on global black carbon distribution.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(12). |
MLA | Qi, Ling,et al."Effects of the Wegener-Bergeron-Findeisen process on global black carbon distribution".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.12(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论