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Title: Macquarie Island Cloud and Radiation Experiment (MICRE) Science Plan

Clouds over the Southern Ocean are poorly represented in present day reanalysis products and global climate model simulations. Errors in top-of-atmosphere (TOA) broadband radiative fluxes in this region are among the largest globally, with large implications for modeling both regional and global scale climate responses (e.g., Trenberth and Fasullo 2010, Ceppi et al. 2012). Recent analyses of model simulations suggest that model radiative errors in the Southern Ocean are due to a lack of low-level postfrontal clouds (including clouds well behind the front) and perhaps a lack of supercooled liquid water that contribute most to the model biases (Bodas-Salcedo et al. 2013, Huang et al. 2014). These assessments of model performance, as well as our knowledge of cloud and aerosol properties over the Southern Ocean, rely heavily on satellite data sets. Satellite data sets are incomplete in that the observations are not continuous (i.e., they are acquired only when the satellite passes nearby), generally do not sample the diurnal cycle, and view primarily the tops of cloud systems (especially for the passive instruments). This is especially problematic for retrievals of aerosol, low-cloud properties, and layers of supercooled water embedded within (rather than at the top of) clouds, as well asmore » estimates of surface shortwave and longwave fluxes based on these properties.« less
 [1] ;  [2] ;  [3]
  1. University of Washington
  2. Australian Bureau of Meterology
  3. Australian Antarctic Division
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OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Program Document
DOE ARM Climate Research Facility, Pacific Northwest National Laboratory; Richland, Washington.
Research Org:
DOE ARM Climate Research Facility, Pacific Northwest National Laboratory; Richland, Washington.
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States