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Evaluation protocol for the WIND system atmospheric models

Description: Atmospheric transport and diffusion models have been developed for real-time calculations of the location and concentration of toxic or radioactive materials during a accidental release at the Savannah River Site (SRS). These models are have been incorporated into an automated menu-driven computer based system called the WIND (Weather INformation and Display) system. In an effort to establish more formal quality assurance procedures for the WIND system atmospheric codes, a software evaluation p… more
Date: December 31, 1991
Creator: Fast, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparisons of model simulations of climate variability with data, Task 2. [Progress report]

Description: Significant progress has been made in our investigations aimed at diagnosing low frequency variations of climate in General Circulation Models. We have analyzed three versions of the Oregon State University General Circulation Model (OSU GCM). These are: (1) the Slab Model in which the ocean is treated as a static heat reservoir of fixed depth, (2) the coupled upper ocean-atmosphere model in which the ocean dynamics are calculated in two layers of variable depths representing the mixed layers a… more
Date: December 31, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of general circulation model results and comparison with regional climatic data, Task 3. [Progress report]

Description: On time scales of greater than one year the variability of weather and climate on a large path of the Earth is dominated by the Southern Oscillation. While current theories of this phenomenon have clarified the role of the interaction between the ocean and the atmosphere in maintaining this oscillation it has so far been unclear whether the Southern Oscillation originates in the ocean, in the atmosphere or during the interaction between the ocean and the atmosphere. In this study we compared si… more
Date: December 31, 1989
Creator: Cess, R. D. & Hameed, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling the response of the California Current system to global greenhouse warming. Final report to the National Institute for Global Environmental Change (August 1993)

Description: This is the final report for the project ``Modeling the Response of the California Current System to Global Greenhouse Warming,`` supported 1990 and 1991 by NIGEC. The scientists involved are Dr. Richard C.J. Somerville and Alejandro Paries-Sierra of Scripps Institution of Oceanography, UCSD. A copy of papers submitted to the Journal of Physical Oceanography, and Geofisica Internacional that were supported in part or whole by WEST-GEC, as well as a summary of a talk delivered at the XX General … more
Date: December 31, 1993
Creator: Pares-Sierra, A. & Somerville, R. C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final Report for LDRD Project ''A New Era of Research in Aerosol/Cloud/Climate Interactions at LLNL''

Description: Observations of global temperature records seem to show less warming than predictions of global warming brought on by increasing concentrations of CO{sub 2} and other greenhouse gases. One of the reasonable explanations for this apparent inconsistency is that the increasing concentrations of anthropogenic aerosols may be partially counteracting the effects of greenhouse gases. Aerosols can scatter or absorb the solar radiation, directly change the planetary albedo. Aerosols, unlike CO{sub 2}, m… more
Date: January 31, 2002
Creator: Chuang, C.; Bergman, D. J.; Dignon, J. E. & Connell, P. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MPMM: A Massively Parallel Mesoscale Model

Description: Static domain decomposition is a technique that provides a quick path to porting atmospheric models on distributed memory parallel computers. However, parallel inefficiencies in the form of load imbalances and ill-tuned communication are difficult to correct without complicated and explicit recoding. Reconfiguring the code to run on larger or smaller numbers of processors may require recompiling. Modularity and machine independence may also suffer. If full advantage is to be taken of Massively … more
Date: December 31, 1992
Creator: Foster, I. & Michalakes, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SPARTICUS: Small Particles in Cirrus Science and Operations Plan

Description: From a mass-weighted perspective, cirrus clouds exert an enormous influence on the radiative energy budget of the earth’s climate system. Owing to their location in the cold upper troposphere, cirrus can significantly reduce the outgoing longwave radiation while, at the same time, remaining relatively transmissive to solar energy. Thus, cirrus clouds are the only cloud genre that can exert a direct radiative warming influence on the climate system (Ackerman et al. 1988). It is not surprising, t… more
Date: October 31, 2009
Creator: J Mace, E Jensen, G McFarquhar, J Comstock, T Ackerman, D Mitchell, X Liu, T Garrett
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regional forest-ABL coupling: influence on CO{sub 2} and climate. Progress to date

Description: A National Center for Atmospheric Research (NCAR) Integrated Sounding System (ISS) was deployed about 5 km east of the WLEF-TV tower in Chequamegon National Forest, Wisconsin. The tower is instrumented for high-precision, high-accuracy CO{sub 2} mixing ratio measurements at six levels up to 396 m above ground and continuous eddy-covariance flux measurements at three levels up to 396 km. The ISS, including boundary layer radar profile, radio acoustic sounding system, and rawinsonde system was op… more
Date: August 31, 2001
Creator: Davis, Kenneth J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

First year progress report on research project on CO{sub 2}-induced climate change

Description: The three major areas of study are discussed separately in this report of the first year of the Research Project on CO{sub 2}-Induced Climate Change. The first task deals with an intercomparison of general circulation model capabilities with the aim of improving their parameterizations of important physical processes, so that model predictions of CO{sub 2} induced climate change become more reliable. Task 2 encompasses analysis of climate data for the purpose of understanding climate change and… more
Date: December 31, 1991
Creator: Cess, R. D. & Hameed, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A preliminary analysis of the US west climatology

Description: In a previous paper, Roads et al.(1991) discussed the forecast accuracy of the National Meteorological Center`s (NMC`s) medium-range forecasts (MRFs) of various near-surface meteorological elements, such as temperature, relative humidity, and wind speed in terms of NMC`s global analysis. Although these global analyses are most applicable for global perspectives, the authors are interested in more regional scales. Here one might expect the large-scale global analyses to only grossly simulate var… more
Date: December 31, 1992
Creator: Roads, J. O.; Chen, S. C.; Ueyoshi, K.; Bossert, J. & Winterkamp, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modeling the atmospheric input of nutrients, heavy metals, and pesticides to the Great Lakes

Description: This report documents proceedings of the workshop on Emissions and Modelling of Atmospheric Transport of Persistent Organic Pollutants and Heavy Metals. Topics include: various atmospheric circulation models; deposition of sulfates, nitrogen oxides, lead, and toxaphene into the Great Lakes and Canadian regions; and mercury deposition by dry deposition and washout.
Date: December 31, 1993
Creator: Shannon, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A hierarchical framework for coupling surface fluxes to atompsheric general circulation models: The homogeneity test

Description: The atmosphere and the biosphere are inherently coupled to one another. Atmospheric surface state variables such as temperature, winds, water vapor, precipitation, and radiation control biophysical, biogeochemical, and ecological processes at the surface and subsurface. At the same time, surface fluxes of momentum, moisture, heat, and trace gases act as time-dependent boundary conditions providing feedback on atmospheric processes. To understand such phenomena, a coupled set of interactive mode… more
Date: December 31, 1993
Creator: Miller, N. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A study of longwave radiation codes for climate studies: Validation with ARM observations and tests in general circulation models. Technical report, 15 September 1990--25 April 1993

Description: This report summarizes the activities of our group to meet our stated objectives. The report is divided into sections entitled: Radiation Model Testing Activities, General Circulation Model Testing Activities, Science Team Activities, and Publications, Presentations and Meetings. The section on Science Team Activities summarizes our participation with the science team to further advance the observation and modeling programs. Appendix A lists graduate students supported, and post-doctoral appoin… more
Date: December 31, 1993
Creator: Ellingson, Robert G. & Baer, Ferdinand
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ARM Climate Research Facility Annual Report 2004

Description: Like a rock that slowly wears away beneath the pressure of a waterfall, planet earth?s climate is almost imperceptibly changing. Glaciers are getting smaller, droughts are lasting longer, and extreme weather events like fires, floods, and tornadoes are occurring with greater frequency. Why? Part of the answer is clouds and the amount of solar radiation they reflect or absorb. These two factors clouds and radiative transfer represent the greatest source of error and uncertainty in the current ge… more
Date: December 31, 2004
Creator: Voyles, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The impact of recent model improvements on GISS GCM predictions of climate change. Final technical report, September 15, 1992--September 14, 1994

Description: The response of the 8 x 10{degree} horizontal resolution version of Model 2 to the forcing of globally observed SST (1980--1986) was evaluated. The simulations showed a realistic interannual variability of interhemispheric gradients of layer mean temperatures in response to observed SST gradients, but modeled near-surface winds over the Atlantic Ocean were much weaker than observed, a symptom of the Model 2 planetary boundary layer (PBL). In addition, the interannual variability of peak-season … more
Date: December 31, 1994
Creator: Druyan, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final report for symmetric truncations of the shallow water equations and modelling of coherent structures in a boundary layer

Description: In this final report the authors will briefly describe three achievements in the funding period, related to the original goals of the research, and attach some representative papers for each achievement. The original goal of the project was to implement a numerical scheme to numerically solve the shallow water equations (in periodic boundary conditions and on the sphere), in such a way as to preserve not just the enstrophy, but all other invariants consistent with the level of the numerical tru… more
Date: December 31, 1996
Creator: Rouhi, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Forward-in-time differencing for fluids: Nonhydrostatic modeling of fluid motions on a sphere

Description: Traditionally, numerical models for simulating planetary scale weather and climate employ the hydrostatic primitive equations--an abbreviated form of Navier-Stokes` equations that neglect vertical accelerations and use simplified Coriolis forces. Although there is no evidence so far that including nonhydrostatic effects in global models has any physical significance for large scale solutions, there is an emerging trend in the community toward restoring Navier-Stokes` equations (or at least thei… more
Date: December 31, 1998
Creator: Smolarkiewicz, P.K.; Grubisic, V.; Margolin, L.G. & Wyszogrodzki, A.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Learning and enhanced climate representation in integrated assessment models. Final report, September 1994--May 1997

Description: The objective of the project is to enhance capabilities for integrated-assessment modeling in two major areas: learning/R and D/information acquisition and the nexus between climate dynamics and climate impacts. In the first of these areas, the author`s objective is to improve the way in which economic models deal with learning (endogenous and/or exogenous) within an economy. This would obviously include the R and D process, whereby knowledge about climate change (and many other things) is acqu… more
Date: December 31, 1997
Creator: Kolstad, C.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Data systems for science integration within the Atmospheric Radiation Measurement Program

Description: The Atmospheric Radiation Measurement (ARM) Program was developed by the US Department of Energy to support the goals and mission of the US Global Change Research Program. The purpose of the ARM program is to improve the predictive capabilities of General Circulation Models (GCMs) in their treatment of clouds and radiative transfer effects. Three experimental testbeds were designed for the deployment of instruments to collect atmospheric data used to drive the GCMs. Each site, known as a Cloud … more
Date: December 31, 1995
Creator: Gracio, D. K.; Hatfield, L. D.; Yates, K. R.; Voyles, J. W.; Tichler, J. L.; Cederwall, R. T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Stochastic radiation transfer]. Final report

Description: The original proposal was to produce a new cloud parameterization based upon an innovative stochastic radiative transfer techniques, in which the parameters will be validated by ARM data. The authors intended to construct a subgrid model for use in GCMs that would account for the effects of unresolved clouds on radiation flow, and they pointed out that scattering could be accommodated in this approach. They were to use ARM site data on cloud morphology and cloud/radiative energy balance in deve… more
Date: December 31, 1992
Creator: Byrne, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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WINDII atmospheric wave airglow imaging

Description: Preliminary WINDII nighttime airglow wave-imaging data in the UARS rolldown attitude has been analyzed with the goal to survey gravity waves near the upper boundary of the middle atmosphere. Wave analysis is performed on O[sub 2](0,0) emissions from a selected 1[sup 0] x 1[sup 0] oblique view of the airglow layer at approximately 95 km altitude, which has no direct earth background and only an atmospheric background which is optically thick for the 0[sub 2](0,0) emission. From a small data set,… more
Date: December 31, 1996
Creator: Armstrong, William T.; Hoppe, U. P.; Solheim, B. H. & Shepherd, G. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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