气候变化领域集成服务门户(CCPortal): The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry

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DOI	10.5194/acp-21-339-2021
	The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry
	Camarinha-Neto G.F.; Cohen J.C.P.; Dias C.Q.; Jr.; Sörgel M.; Cattanio J.H.; Araújo A.; Wolff S.; Kuhn P.A.F.; Souza R.A.F.; Rizzo L.V.; Artaxo P.
发表日期	2021
ISSN	1680-7316
起始页码	339
结束页码	356
卷号	21 期号:1
英文摘要	In the period between 9 and 11 July 2014, a friagem event reached the Amazon region. On 11 July, the southwest flow related to the friagem converged with the easterly winds in the central Amazon. The interaction between these two distinct air masses formed a convection band, which intensified over the Manaus region and the Amazon Tall Tower Observatory (ATTO) site. The satellite images show the evolution of convective activity on 11 July, which led to 21 mm of precipitation at the ATTO site. Moreover, the arrival of the friagem caused a sudden drop in temperature and a predominance of southerly winds, which could be seen in Porto Velho between 7 and 8 July and in Manaus and the ATTO site from 9 to 11 July. The results of ERA-Interim reanalysis and Brazilian developments on the Regional Atmospheric Modeling System (BRAMS) simulations show that this friagem event coming from the southwest, carries a mass of air with higher O3 and NO2 mixing ratios and lower CO mixing ratio compared to the air masses present in the central Amazon. At Lake Balbina, the friagem intensifies the local circulations, such as the breeze phenomena. In the Manaus region and at the ATTO site, the main effects of the friagem event are a decrease in the incoming solar radiation (due to intense cloud formation), a large temperature drop and a distinct change in surface O3 and CO2 mixing ratios. As the cold air of the friagem was just in the lower 500 m the most probable cause of this change is that a cold pool above the forest prevented vertical mixing causing accumulation of CO2 from respiration and very low O3 mixing ratio due to photochemistry reduction and limited mixing within the boundary layer. © 2021 Copernicus GmbH. All rights reserved.
英文关键词	air mass; atmospheric chemistry; carbon dioxide; cold air; convection; micrometeorology; nitrogen dioxide; oxygen; precipitation assessment; satellite imagery; Amazonia
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168840
作者单位	Postgraduate Program on Environmental Sciences - PPGCA, Federal University of Pará (UFPA), Belém, PA, Brazil; Faculty of Meteorology, Federal University of Pará (UFPA), Belém, PA, Brazil; Department of Physics, Federal Institute of Pará (IFPA), Belém, PA, Brazil; Biogeochemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, Mainz, 55020, Germany; Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Belém, PA, Brazil; Department of Meteorology, Amazonas State University (UEA), Manaus, Amazonas, Brazil; Department of Environmental Sciences, Institute of Environmental, Chemical and Pharmaceutics Sciences, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil; Institute of Physics, University of São Paulo (USP), São Paulo, São Paulo, Brazil; Atmospheric Chemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, Mainz, 55020, Germany; Multiphase Chemistry Department, Max Planck Institute for Chemistry, P.O. Box 3060, Mainz, 55020, Germany
推荐引用方式 GB/T 7714	Camarinha-Neto G.F.,Cohen J.C.P.,Dias C.Q.,et al. The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry[J],2021,21(1).
APA	Camarinha-Neto G.F..,Cohen J.C.P..,Dias C.Q..,Jr..,Sörgel M..,...&Artaxo P..(2021).The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry.Atmospheric Chemistry and Physics,21(1).
MLA	Camarinha-Neto G.F.,et al."The friagem event in the central Amazon and its influence on micrometeorological variables and atmospheric chemistry".Atmospheric Chemistry and Physics 21.1(2021).