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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

reconditioning, aerosols, and radiation control the temperature of glaciation in Amazonian cloud

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Author(s):
Correia, Alexandre L. [1] ; Sena, Elisa T. [2] ; Silva Dias, Maria A. F. [3] ; Koren, Ilan [4]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Phys, Sao Paulo - Brazil
[2] Univ Fed Sao Paulo, Multidisciplinary Dept, Osasco - Brazil
[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil
[4] Weizmann Inst Sci, Rehovot - Israel
Total Affiliations: 4
Document type: Journal article
Source: COMMUNICATIONS EARTH & ENVIRONMENT; v. 2, n. 1 AUG 19 2021.
Web of Science Citations: 1
Abstract

Glaciation in clouds is a fundamental phenomenon in determining Earth's radiation fluxes, sensible and latent heat budgets in the atmosphere, the water cycle, cloud development and lifetime. Nevertheless, the main mechanisms that govern the temperature of glaciation in clouds have not been fully identified. Here we present an analysis of 15 years (2000-2014) of satellite, sunphotometer, and reanalysis datasets over the Amazon. We find that the temperature of glaciation in convective clouds is controlled by preconditioning dynamics, natural and anthropic aerosols, and radiation. In a moist atmospheric column, prone to deep convection, increasing the amount of aerosols leads to a delay in the onset of glaciation, reducing the glaciation temperature. For a dry column, radiative extinction by biomass burning smoke leads to atmospheric stabilization and an increase in the glaciation temperature. Our results offer observational benchmarks that can help a more precise description of glaciation in convective cloud models. The temperature at which clouds glaciate is controlled by preconditioning dynamics, aerosol concentration and radiation. Smoke can delay or favour glaciation depending on moisture, according to analyses of 15 years observations and reanalysis data from the Amazon Basin. (AU)

FAPESP's process: 10/15959-3 - SeReNA Project: remote sensing of cloud microphysics and its interaction with atmospheric aerosols
Grantee:Alexandre Lima Correia
Support Opportunities: Regular Research Grants