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Title: New approaches to quantifying aerosol influence on the cloud radiative effect

The topic of cloud radiative forcing associated with the atmospheric aerosol has been the focus of intense scrutiny for decades. The enormity of the problem is reflected in the need to understand aspects such as aerosol composition, optical properties, cloud condensation, and ice nucleation potential, along with the global distribution of these properties, controlled by emissions, transport, transformation, and sinks. Equally daunting is that clouds themselves are complex, turbulent, microphysical entities and, by their very nature, ephemeral and hard to predict. Atmospheric general circulation models represent aerosol–cloud interactions at ever-increasing levels of detail, but these models lack the resolution to represent clouds and aerosol–cloud interactions adequately. There is a dearth of observational constraints on aerosol–cloud interactions. In this paper, we develop a conceptual approach to systematically constrain the aerosol–cloud radiative effect in shallow clouds through a combination of routine process modeling and satellite and surface-based shortwave radiation measurements. Finally, we heed the call to merge Darwinian and Newtonian strategies by balancing microphysical detail with scaling and emergent properties of the aerosol–cloud radiation system.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. National Oceanic and Atmospheric Administration, Boulder, CO (United States)
  2. National Oceanic and Atmospheric Administration, Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States)
  3. Univ. of Leeds, Leeds (United Kingdom)
  4. Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Grant/Contract Number:
SC0006972; SC0008112
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 21; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Research Org:
National Oceanic and Atmospheric Administration, Boulder, CO (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; aerosol; cloud; radiation; climate forcing
OSTI Identifier:
1236652
Alternate Identifier(s):
OSTI ID: 1348416