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Development and Testing of a Life Cycle Model and a Parameterization of Thin Mid-level Stratiform Clouds

Description: We used a cloud-resolving model (a detailed computer model of cloud systems) to evaluate and improve the representation of clouds in global atmospheric models used for numerical weather prediction and climate modeling. We also used observations of the atmospheric state, including clouds, made at DOE's Atmospheric Radiation Measurement (ARM) Program's Climate Research Facility located in the Southern Great Plains (Kansas and Oklahoma) during Intensive Observation Periods to evaluate our detailed… more
Date: March 3, 2008
Creator: Krueger, Steven K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final report for the project "Improving the understanding of surface-atmosphere radiative interactions by mapping surface reflectance over the ARM CART site" (award DE-FG02-02ER63351)

Description: Surface spectral reflectance (albedo) is a fundamental variable affecting the transfer of solar radiation and the Earth’s climate. It determines the proportion of solar energy absorbed by the surface and reflected back to the atmosphere. The International Panel on Climate Change (IPCC) identified surface albedo among key factors influencing climate radiative forcing. Accurate knowledge of surface reflective properties is important for advancing weather forecasting and climate change impact stud… more
Date: November 28, 2008
Creator: Trishchenko, Alexander P.; Luo, Yi; Konstantin V. Khlopenkov, William M. Park; Li, Zhanqing & Cribb, Maureen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of GCM Column Radiation Models Under Cloudy Conditions with The Arm BBHRP Value Added Product

Description: The overarching goal of the project was to improve the transfer of solar and thermal radiation in the most sophisticated computer tools that are currently available for climate studies, namely Global Climate Models (GCMs). This transfer can be conceptually separated into propagation of radiation under cloudy and under cloudless conditions. For cloudless conditions, the factors that affect radiation propagation are gaseous absorption and scattering, aerosol particle absorption and scattering and… more
Date: March 14, 2010
Creator: Oreopoulos, Lazaros & Norris, Peter M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Project Report - ARM CLASIC CIRPAS Twin Otter Aerosol

Description: The NOAA/ESRL/GMD aerosol group made three types of contributions related to airborne measurements of aerosol light scattering and absorption for the Cloud and Land Surface Interaction Campaign (CLASIC) in June 2007 on the Twin Otter research airplane operated by the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS). GMD scientists served as the instrument mentor for the integrating nephelometer and particle soot absorption photometer (PSAP) on the Twin Otter during CLASIC… more
Date: April 5, 2010
Creator: Ogren, John A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GFDL ARM Project Technical Report: Using ARM Observations to Evaluate Cloud and Convection Parameterizations & Cloud-Convection-Radiation Interactions in the GFDL Atmospheric General Circulation Model

Description: This report briefly summarizes the progress made by ARM postdoctoral fellow, Yanluan Lin, at GFDL during the period from October 2008 to present. Several ARM datasets have been used for GFDL model evaluation, understanding, and improvement. This includes a new ice fall speed parameterization with riming impact and its test in GFDL AM3, evaluation of model cloud and radiation diurnal and seasonal variation using ARM CMBE data, model ice water content evaluation using ARM cirrus data, and coordin… more
Date: June 17, 2010
Creator: Ramaswamy, V.; Donner, L. J.; Golaz, J-C. & Klein, S. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiation Parameterization for Three-Dimensional Inhomogeneous Cirrus Clouds Applied to ARM Data and Climate Models

Description: OAK-B135 (a) We developed a 3D radiative transfer model to simulate the transfer of solar and thermal infrared radiation in inhomogeneous cirrus clouds. The model utilized a diffusion approximation approach (four-term expansion in the intensity) employing Cartesian coordinates. The required single-scattering parameters, including the extinction coefficient, single-scattering albedo, and asymmetry factor, for input to the model, were parameterized in terms of the ice water content and mean effec… more
Date: December 29, 2003
Creator: Liou, Kuo-Nan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of In situ Observations of Cloud Microphysics from M-PACE Final Report, DOE Grant Agreement No. DE-FG02-06ER64168

Description: This report summarizes the findings and accomplishments of work performed under DOE Grant Agreement No. DE-FG02-06ER64168. The focus of the work was the analysis of in situ observations collected by the University of North Dakota Citation research aircraft during the Mixed-Phase Arctic Cloud Experiment (M-PACE). This project was conducted in 2004 along the North Slope of Alaska. The objectives of the research were: to characterize certain microphysical properties of clouds sampled during M-PACE… more
Date: January 9, 2009
Creator: Poellot, Michael R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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