Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-5771-2019 |
The vertical distribution of biomass burning pollution over tropical South America from aircraft in situ measurements during SAMBBA | |
Darbyshire, Eoghan1; 39;Shea, Sebastian J.2 | |
2019-05-03 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:9页码:5771-5790 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Brazil; France; USA |
英文摘要 | We examine processes driving the vertical distribution of biomass burning pollution following an integrated analysis of over 200 pollutant and meteorological profiles measured in situ during the South AMerican Biomass Burning Analysis (SAMBBA) field experiment. This study will aid future work examining the impact of biomass burning on weather, climate and air quality. During the dry season there were significant contrasts in the composition and vertical distribution of haze between western and eastern regions of tropical South America. Owing to an active or residual convective mixing layer, the aerosol abundance was similar from the surface to similar to 1.5 km in the west and similar to 3 km in the east. Black carbon mass loadings were double as much in the east (1.7 mu g m(-3)) than the west (0.85 mu g m(-3)), but aerosol scattering coefficients at 550 nm were similar (similar to 120 Mm(-1)), as too were CO near-surface concentrations (310-340 ppb). We attribute these contrasts to the more flaming combustion of Cerrado fires in the east and more smouldering combustion of deforestation and pasture fires in the west. Horizontal wind shear was important in inhibiting mixed layer growth and plume rise, in addition to advecting pollutants from the Cerrado regions into the remote tropical forest of central Amazonia. Thin layers above the mixing layer indicate the roles of both plume injection and shallow moist convection in delivering pollution to the lower free troposphere. However, detrainment of large smoke plumes into the upper free troposphere was very infrequently observed. Our results reiterate that thermodynamics control the pollutant vertical distribution and thus point to the need for correct model representation so that the spatial distribution and vertical structure of biomass burning smoke is captured. We observed an increase of aerosol abundance relative to CO with altitude both in the background haze and plume enhancement ratios. It is unlikely associated with thermodynamic partitioning, aerosol deposition or local non-fire sources. We speculate it may be linked to long-range transport from West Africa or fire combustion efficiency coupled to plume injection height. Further enquiry is required to explain the phenomenon and explore impacts on regional climate and air quality. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000466855400001 |
WOS关键词 | SMOKE PLUME-RISE ; AMAZON BASIN ; TRACE GASES ; BOUNDARY-LAYER ; BLACK CARBON ; AIRBORNE OBSERVATIONS ; AEROSOL TRANSPORT ; WRF-CHEM ; EMISSIONS ; FIRE |
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/183159 |
专题 | 地球科学 |
作者单位 | 1.Univ Manchester, Ctr Atmospher Sci, Manchester, Lancs, England; 2.Met Off, Exeter, Devon, England; 3.Univ Cranfield, FAAM, Cranfield, Beds, England; 4.Univ Exeter, CEMPS, Exeter, Devon, England; 5.Univ Sao Paulo, Phys Inst, Sao Paulo, Brazil; 6.Natl Inst Space Res INPE, Sao Jose Dos Campos, Brazil; 7.Univ Clermt Auvergne, Lab Meteorol Phys LaMP, Aubiere, France; 8.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 9.USRA GESTAR, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Darbyshire, Eoghan,39;Shea, Sebastian J.. The vertical distribution of biomass burning pollution over tropical South America from aircraft in situ measurements during SAMBBA[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(9):5771-5790. |
APA | Darbyshire, Eoghan,&39;Shea, Sebastian J..(2019).The vertical distribution of biomass burning pollution over tropical South America from aircraft in situ measurements during SAMBBA.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(9),5771-5790. |
MLA | Darbyshire, Eoghan,et al."The vertical distribution of biomass burning pollution over tropical South America from aircraft in situ measurements during SAMBBA".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.9(2019):5771-5790. |
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