气候变化领域集成服务门户(CCPortal): Cloud droplet formation at the base of tropical convective clouds: Closure between modeling and measurement results of ACRIDICON-CHUVA

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DOI	10.5194/acp-21-17513-2021
	Cloud droplet formation at the base of tropical convective clouds: Closure between modeling and measurement results of ACRIDICON-CHUVA
	Braga R.C.; Ervens B.; Rosenfeld D.; Andreae M.O.; Förster J.-D.; Fütterer D.; Hernández Pardo L.; Holanda B.A.; Jurkat-Witschas T.; Krüger O.O.; Lauer O.; MacHado L.A.T.; Pöhlker C.; Sauer D.; Voigt C.; Walser A.; Wendisch M.; Pöschl U.; Pöhlker M.L.
发表日期	2021
ISSN	1680-7316
起始页码	17513
结束页码	17528
卷号	21 期号:23
英文摘要	Aerosol-cloud interactions contribute to the large uncertainties in current estimates of climate forcing. We investigated the effect of aerosol particles on cloud droplet formation by model calculations and aircraft measurements over the Amazon and over the western tropical Atlantic during the ACRIDICON-CHUVA campaign in September 2014. On the HALO (High Altitude Long Range Research) research aircraft, cloud droplet number concentrations (Nd) were measured near the base of clean and polluted growing convective cumuli using a cloud combination probe (CCP) and a cloud and aerosol spectrometer (CAS-DPOL). An adiabatic parcel model was used to perform cloud droplet number closure studies for flights in differently polluted air masses. Model input parameters included aerosol size distributions measured with an ultra-high sensitive aerosol spectrometer (UHSAS), in combination with a condensation particle counter (CPC). Updraft velocities (w) were measured with a boom-mounted Rosemount probe. Over the continent, the aerosol size distributions were dominated by accumulation mode particles, and good agreement between measured and modeled Nd values was obtained (deviations g210%) assuming an average hygroscopicity of κg1/40.1, which is consistent with Amazonian biomass burning and secondary organic aerosol. Above the ocean, fair agreement was obtained assuming an average hygroscopicity of κg1/40.2 (deviations g216%) and further improvement was achieved assuming different hygroscopicities for Aitken and accumulation mode particles (κAitCombining double low line0.8, κaccCombining double low line0.2; deviations g210%), which may reflect secondary marine sulfate particles. Our results indicate that Aitken mode particles and their hygroscopicity can be important for droplet formation at low pollution levels and high updraft velocities in tropical convective clouds. © 2021 Copernicus GmbH. All rights reserved.
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/246401
作者单位	Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Clermont-Ferrand, 63000, France; Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel; Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Scripps Institution of Oceanography, University of California San Diego, San diego, CA 92037, United States; Institute of Atmospheric Physics, German Aerospace Center (DLR), Oberpfaffenhofen, 82234, Germany; National Institute for Space Research (INPE), São José Dos Campos, 12227-010, Brazil; Johannes Gutenberg University Mainz, Mainz, 55099, Germany; Faculty of Physics and Earth Sciences, Leipzig Institute for Meteorology, University of Leipzig, Leipzig, 04103, Germany; Experimental Aerosol and Cloud Microphysics Department, Leibniz Institute for Tropospheric Research, Leipzig, Germany
推荐引用方式 GB/T 7714	Braga R.C.,Ervens B.,Rosenfeld D.,et al. Cloud droplet formation at the base of tropical convective clouds: Closure between modeling and measurement results of ACRIDICON-CHUVA[J],2021,21(23).
APA	Braga R.C..,Ervens B..,Rosenfeld D..,Andreae M.O..,Förster J.-D..,...&Pöhlker M.L..(2021).Cloud droplet formation at the base of tropical convective clouds: Closure between modeling and measurement results of ACRIDICON-CHUVA.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(23).
MLA	Braga R.C.,et al."Cloud droplet formation at the base of tropical convective clouds: Closure between modeling and measurement results of ACRIDICON-CHUVA".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.23(2021).