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Title: A long-term study of aerosol–cloud interactions and their radiative effect at the Southern Great Plains using ground-based measurements

Journal Article · · Atmospheric Chemistry and Physics (Online)
 [1];  [2];  [3]
  1. Univ. of Sao Paulo, Sao Paulo (Brazil); NOAA Chemical Sciences Division, Boulder, CO (United States)
  2. NOAA Global Monitoring Division, Boulder, CO (United States)
  3. NOAA Chemical Sciences Division, Boulder, CO (United States)

Empirical estimates of the microphysical response of cloud droplet size distribution to aerosol perturbations are commonly used to constrain aerosol–cloud interactions in climate models. Instead of empirical microphysical estimates, here macroscopic variables are analyzed to address the influence of aerosol particles and meteorological descriptors on instantaneous cloud albedo and the radiative effect of shallow liquid water clouds. Long-term ground-based measurements from the Atmospheric Radiation Measurement (ARM) program over the Southern Great Plains are used. A broad statistical analysis was performed on 14 years of coincident measurements of low clouds, aerosol, and meteorological properties. Here two cases representing conflicting results regarding the relationship between the aerosol and the cloud radiative effect were selected and studied in greater detail. Microphysical estimates are shown to be very uncertain and to depend strongly on the methodology, retrieval technique and averaging scale. For this continental site, the results indicate that the influence of the aerosol on the shallow cloud radiative effect and albedo is weak and that macroscopic cloud properties and dynamics play a much larger role in determining the instantaneous cloud radiative effect compared to microphysical effects. On a daily basis, aerosol shows no correlation with cloud radiative properties (correlation = -0.01 ± 0.03), whereas the liquid water path shows a clear signal (correlation = 0.56 ± 0.02).

Research Organization:
National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0014568
OSTI ID:
1364422
Journal Information:
Atmospheric Chemistry and Physics (Online), Vol. 16, Issue 17; ISSN 1680-7324
Publisher:
European Geosciences UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (9)

The Radiative Forcing of Aerosol–Cloud Interactions in Liquid Clouds: Wrestling and Embracing Uncertainty journal February 2018
Effects of Continental Clouds on Surface Aitken and Accumulation Modes journal May 2019
Analysis of aerosol effects on warm clouds over the Yangtze River Delta from multi-sensor satellite observations journal January 2017
Aerosol–cloud interactions in mixed-phase convective clouds – Part 2: Meteorological ensemble journal January 2018
An emulator approach to stratocumulus susceptibility journal January 2019
Aerosol properties and their influences on low warm clouds during the Two-Column Aerosol Project journal January 2019
Aerosol Properties and Their Influences on Low Warm Clouds during the Two-Column Aerosol Project posted_content February 2019
Investigation of aerosol–cloud interactions under different absorptive aerosol regimes using Atmospheric Radiation Measurement (ARM) southern Great Plains (SGP) ground-based measurements journal January 2020
Clouds over Hyytiälä, Finland: an algorithm to classify clouds based on solar radiation and cloud base height measurements journal June 2020

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