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Title: Atmospheric radiation measurement: A program for improving radiative forcing and feedback in general circulation models

The Atmospheric Radiation Measurement (ARM) Program is a key element of the Department of Energy`s (DOE`s) global change research strategy. ARM represents a long-term commitment to conduct comprehensive studies of the spectral atmospheric radiative energy balance profile for a wide range of cloud conditions and surface types, and to develop the knowledge necessary to improve parameterizations of radiative processes under various cloud regimes for use in general circulation models (GCMs) and related models. The importance of the ARM program is a apparent from the results of model assessments of the impact on global climate change. Recent studies suggest that radiatively active trace gas emissions caused by human activity can lead to a global warming of 1.5 to 4.5 degrees Celsius and to important changes in water availability during the next century (Cess, et al. 1989). These broad-scale changes can be even more significant at regional levels, where large shifts in temperature and precipitation patterns are shown to occur. However, these analyses also indicate that considerable uncertainty exists in these estimates, with the manner in which cloud radiative processes are parameterized among the most significant uncertainty. Thus, although the findings have significant policy implications in assessment of global and regional climatemore » change, their uncertainties greatly influence the policy debate. ARM`s highly focused observational and analytical research is intended to accelerate improvements and reduce key uncertainties associated with the way in which GCMs treat cloud cover and cloud characteristics and the resulting radiative forcing. This paper summarizes the scientific context for ARM, ARM`s experimental approach, and recent activities within the ARM program.« less
Authors:
 [1] ; ;  [2] ;  [3]
  1. USDOE, Washington, DC (United States)
  2. Pacific Northwest Lab., Richland, WA (United States)
  3. Maryland Univ., College Park, MD (United States)
Publication Date:
OSTI Identifier:
10147575
Report Number(s):
PNL-SA--18559; CONF-910143--6
ON: DE92014263
DOE Contract Number:
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: 71. annual meeting of the American Meteorological Society,New Orleans, LA (United States),13-18 Jan 1991; Other Information: PBD: Jan 1991
Research Org:
Pacific Northwest Lab., Richland, WA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; RADIATION TRANSPORT; GENERAL CIRCULATION MODELS; RESEARCH PROGRAMS; ATMOSPHERIC CIRCULATION; CLIMATIC CHANGE; CLOUDS; ENERGY BALANCE; EARTH ATMOSPHERE; GASES; EMISSION; US DOE PROGRAM MANAGEMENT; SITE SELECTION; SAMPLING; CHLOROFLUOROCARBONS; CHEMICAL ANALYSIS; OZONE LAYER; GREENHOUSE EFFECT 540120; CHEMICALS MONITORING AND TRANSPORT