Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-14785-2017 |
Modeling the radiative effects of biomass burning aerosols on carbon fluxes in the Amazon region | |
Moreira, Demerval S.1,2; Longo, Karla M.3,14; Freitas, Saulo R.3,14; Yamasoe, Marcia A.4; Mercado, Lina M.5,6; Rosario, Nilton E.7; Gloor, Emauel8; Viana, Rosane S. M.9; Miller, John B.10; Gatti, Luciana V.11,12; Wiedemann, Kenia T.13; Domingues, Lucas K. G.11,12; Correia, Caio C. S.11,12 | |
2017-12-12 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; England; USA |
英文摘要 | Every year, a dense smoke haze covers a large portion of South America originating from fires in the Amazon Basin and central parts of Brazil during the dry biomass burning season between August and October. Over a large portion of South America, the average aerosol optical depth at 550 nm exceeds 1.0 during the fire season, while the background value during the rainy season is below 0.2. Biomass burning aerosol particles increase scattering and absorption of the incident solar radiation. The regional-scale aerosol layer reduces the amount of solar energy reaching the surface, cools the near-surface air, and increases the diffuse radiation fraction over a large disturbed area of the Amazon rainforest. These factors affect the energy and CO2 fluxes at the surface. In this work, we applied a fully integrated at-mospheric model to assess the impact of biomass burning aerosols in CO2 fluxes in the Amazon region during 2010. We address the effects of the attenuation of global solar radiation and the enhancement of the diffuse solar radiation flux inside the vegetation canopy. Our results indicate that biomass burning aerosols led to increases of about 27% in the gross primary productivity of Amazonia and 10% in plant respiration as well as a decline in soil respiration of 3%. Consequently, in our model Amazonia became a net carbon sink; net ecosystem exchange during September 2010 dropped from +101 to -104 TgC when the aerosol effects are considered, mainly due to the aerosol diffuse radiation effect. For the forest biome, our results point to a dominance of the diffuse radiation effect on CO2 fluxes, reaching a balance of 50-50% between the diffuse and direct aerosol effects for high aerosol loads. For C3 grasses and savanna (cerrado), as expected, the contribution of the diffuse radiation effect is much lower, tending to zero with the increase in aerosol load. Taking all biomes together, our model shows the Amazon during the dry season, in the presence of high biomass burning aerosol loads, changing from being a source to being a sink of CO2 to the atmosphere. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417753400003 |
WOS关键词 | ENVIRONMENT SIMULATOR JULES ; TRACER TRANSPORT MODEL ; NET ECOSYSTEM EXCHANGE ; SYSTEM CATT-BRAMS ; BRAZILIAN DEVELOPMENTS ; DIFFUSE-RADIATION ; COUPLED AEROSOL ; CLIMATE-CHANGE ; SOIL-MOISTURE ; OPTICAL DEPTH |
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/16150 |
专题 | 地球科学 |
作者单位 | 1.Univ Estadual Paulista UNESP, Fac Ciencias, Bauru, SP, Brazil; 2.Ctr Meteorol Bauru IPMet, Bauru, SP, Brazil; 3.INPE, Ctr Previsao Tempo & Estud Climaticos, Cachoeira Paulista, SP, Brazil; 4.Univ Sao Paulo, Dept Ciencias Atmosfer, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo, SP, Brazil; 5.Univ Exeter, Coll Life & Environm Sci, Geog, Exeter, Devon, England; 6.CEH, Wallingford, Oxon, England; 7.Univ Fed Sao Paulo UNIFESP, Campus Diadema, Diadema, SP, Brazil; 8.Univ Leeds, Sch Geog, Woodhouse Lane, Leeds, W Yorkshire, England; 9.Univ Fed Vicosa, Dept Matemat, Vicosa, MG, Brazil; 10.NOAA, Earth Syst Res Lab, Global Monitoring Div, Boulder, CO 80305 USA; 11.INPE, Ctr Ciencias Sistema Terrestre, Sao Jose Dos Campos, SP, Brazil; 12.CNEN, IPEN, Sao Paulo, Brazil; 13.Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA; 14.NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, USRA GESTAR, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Moreira, Demerval S.,Longo, Karla M.,Freitas, Saulo R.,et al. Modeling the radiative effects of biomass burning aerosols on carbon fluxes in the Amazon region[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(23). |
APA | Moreira, Demerval S..,Longo, Karla M..,Freitas, Saulo R..,Yamasoe, Marcia A..,Mercado, Lina M..,...&Correia, Caio C. S..(2017).Modeling the radiative effects of biomass burning aerosols on carbon fluxes in the Amazon region.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(23). |
MLA | Moreira, Demerval S.,et al."Modeling the radiative effects of biomass burning aerosols on carbon fluxes in the Amazon region".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.23(2017). |
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