气候变化领域集成服务门户(CCPortal): How weather events modify aerosol particle size distributions in the Amazon boundary layer

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DOI	10.5194/acp-21-18065-2021
	How weather events modify aerosol particle size distributions in the Amazon boundary layer
	Machado L.A.T.; Franco M.A.; Kremper L.A.; Ditas F.; Andreae M.O.; Artaxo P.; Cecchini M.A.; Holanda B.A.; Pöhlker M.L.; Saraiva I.; Wolff S.; Pöschl U.; Pöhlker C.
发表日期	2021
ISSN	1680-7316
起始页码	18065
结束页码	18086
卷号	21 期号:23
英文摘要	This study evaluates the effect of weather events on the aerosol particle size distribution (PSD) at the Amazon Tall Tower Observatory (ATTO). This research combines in situ measurements of PSD and remote sensing data of lightning density, brightness temperature, cloud top height, cloud liquid water, and rain rate and vertical velocity. Measurements were obtained by scanning mobility particle sizers (SMPSs), the new generation of GOES satellites (GOES-16), the SIPAM S-band radar and the LAP 3000 radar wind profiler recently installed at the ATTO-Campina site. The combined data allow exploring changes in PSD due to different meteorological processes. The average diurnal cycle shows a higher abundance of ultrafine particles (NUFP) in the early morning, which is coupled with relatively lower concentrations in Aitken (NAIT) and accumulation (NACC) mode particles. From the early morning to the middle of the afternoon, an inverse behavior is observed, where NUFP decreases and NAIT and NACC increase, reflecting a typical particle growth process. Composite figures show an increase of NUFP before, during and after lightning was detected by the satellite above ATTO. These findings strongly indicate a close relationship between vertical transport and deep convective clouds. Lightning density is connected to a large increase in NUFP, beginning approximately 100min before the maximum lightning density and reaching peak values around 200min later. In addition, the removal of NACC by convective transport was found. Both the increase in NUFP and the decrease in NACC appear in parallel with the increasing intensity of lightning activity. The NUFP increases exponentially with the thunderstorm intensity. In contrast, NAIT and NACC show a different behavior, decreasing from approximately 100min before the maximum lightning activity and reaching a minimum at the time of maximum lightning activity. The effect of cloud top height, cloud liquid water and rain rate shows the same behavior, but with different patterns between seasons. The convective processes do not occur continually but are probably modulated by gravity waves in the range of 1 to 5h, creating a complex mechanism of interaction with a succession of updrafts and downdrafts, clouds, and clear-sky situations. The radar wind profiler measured the vertical distribution of the vertical velocity. These profiles show that downdrafts are mainly located below 10km, while aircraft observations during the ACRIDICON-CHUVA campaign had shown maximum concentrations of ultrafine particles mainly above 10km. Our study opens new scientific questions to be evaluated in order to understand the intricate physical and chemical mechanisms involved in the production of new particles in Amazonia. © 2021 Luiz A. T. Machado et al.
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/246374
作者单位	Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Instituto de Física, Universidade de São Paulo, São Paulo, Brazil; Scripps Institution of Oceanography, University of California San Diego, La JollaCA, United States; Department of Geology and Geophysics, King Saud University, Riyadh, Saudi Arabia; Meteorology Division, Sistema de Proteção da Amazônia, Manaus, Brazil; Faculty of Physics and Earth Sciences, Leipzig Institute for Meteorology, University of Leipzig, Leipzig, Germany; Experimental Aerosol and Cloud Microphysics Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany; Hessian Agency for Nature Conservation, Environment and Geology, Wiesbaden, Germany
推荐引用方式 GB/T 7714	Machado L.A.T.,Franco M.A.,Kremper L.A.,et al. How weather events modify aerosol particle size distributions in the Amazon boundary layer[J],2021,21(23).
APA	Machado L.A.T..,Franco M.A..,Kremper L.A..,Ditas F..,Andreae M.O..,...&Pöhlker C..(2021).How weather events modify aerosol particle size distributions in the Amazon boundary layer.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(23).
MLA	Machado L.A.T.,et al."How weather events modify aerosol particle size distributions in the Amazon boundary layer".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.23(2021).