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Development and testing of an air quality model for Mexico City

Description: Los Alamos National Laboratory and Instituto Mexicano del Petroleo have embarked on a joint study of options for improving air quality in Mexico City. The intent is to develop a modeling system which can address the behavior of pollutants in the region so that option for improving Mexico City air quality can be properly evaluated. In February of 1991, the project conducted a field program which yielded a variety of data which is being used to evaluate and improve the models. Normally the worst … more
Date: March 2, 1992
Creator: Williams, M. D.; Streit, G. (Los Alamos National Lab., NM (United States)); Cruz, X.; Ruiz, M.; Sosa, G. (Instituto Mexicano de Petroleo, Mexico City (Mexico)); Russell, A. G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ARM tropical pacific experiment (ATPEX): Role of cloud, water vapor and convection feedbacks in the coupled ocean/atmosphere system

Description: We have initiated studies that include radiation model validation, improved treatment of the three-dimensional structure of cloud-radiation interactions, and sensitivity runs that will unravel the role of cloud-convection-radiation interactions in the Pacific Sear Surface Temperatures and the overlying Walker and Hadley circulation. The research program is divided into three phases: (1) radiation, (2) cloud parameterization issues; (3) feedback and ocean-atmosphere interactions.
Date: March 5, 1992
Creator: Ramanathan, V. & Barnett, T.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of an advanced finite-difference atmospheric general circulation model

Description: We have proposed to provide and further develop an advanced finite-difference climate model for use in CHAMMP. The model includes advanced parameterizations of cumulus convection, boundary-layer processes, cloud formation, and land-surface vegetation, as well as parameterizations of radiative transfer and gravity wave drag. Postprocessing codes and a user's guide will also be provided. This research is being conducted in collaboration with Professors C.R. Mechoso and A. Arakawa at the Universit… more
Date: March 1992
Creator: Randall, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Toolkit for Building Earth System Models

Description: An earth system model is a computer code designed to simulate the interrelated processes that determine the earth's weather and climate, such as atmospheric circulation, atmospheric physics, atmospheric chemistry, oceanic circulation, and biosphere. I propose a toolkit that would support a modular, or object-oriented, approach to the implementation of such models.
Date: March 1, 1993
Creator: Foster, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Proceedings of the third Atmospheric Radiation Measurement (ARM) science team meeting

Description: This document contains the summaries of papers presented at the 1993 Atmospheric Radiation Measurement (ARM) Science Team meeting held in Morman, Oklahoma. To put these papers in context, it is useful to consider the history and status of the ARM Program at the time of the meeting. Individual papers have been cataloged separately.
Date: March 1, 1994
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The collected papers of Frederick M. Luther, 1943--1986. Volume 2, 1977--1979

Description: In the sixteen years from completing his Ph.D. to his death in 1986, Fred Luther`s unique combination of scientific insight and personal warmth carried him to the center of an intensifying international effort to better understand atmospheric radiation and its interactions with clouds, aerosols, and gases. His initiation and leadership of the Intercomparison of Radiative Codes in Climate Models (ICRCCM) brought together more than 60 researchers from around the world in an effort to demonstrate … more
Date: March 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Toolkit for Building Earth System Models

Description: An earth system model is a computer code designed to simulate the interrelated processes that determine the earth`s weather and climate, such as atmospheric circulation, atmospheric physics, atmospheric chemistry, oceanic circulation, and biosphere. I propose a toolkit that would support a modular, or object-oriented, approach to the implementation of such models.
Date: March 1, 1993
Creator: Foster, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of an advanced finite-difference atmospheric general circulation model. Progress report, September 1, 1991--August 31, 1992

Description: We have proposed to provide and further develop an advanced finite-difference climate model for use in CHAMMP. The model includes advanced parameterizations of cumulus convection, boundary-layer processes, cloud formation, and land-surface vegetation, as well as parameterizations of radiative transfer and gravity wave drag. Postprocessing codes and a user`s guide will also be provided. This research is being conducted in collaboration with Professors C.R. Mechoso and A. Arakawa at the Universit… more
Date: March 1992
Creator: Randall, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The collected papers of Frederick M. Luther, 1943--1986. Volume 3, 1980--1983

Description: In the sixteen years from completing his Ph.D. to his death in 1986, Fred Luther`s unique combination of scientific insight and personal warmth carried him to the center of an intensifying international effort to better understand atmospheric radiation and its interactions with clouds, aerosols, and gases. His initiation and leadership of the Intercomparison of Radiative Codes in Climate Models (ICRCCM) brought together more than 60 researchers from around the world in an effort to demonstrate … more
Date: March 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Variational elliptic solver for atmospheric applications

Description: We discuss a conjugate gradient type method -- the conjugate residual -- suitable for solving linear elliptic equations that result from discretization of complex atmospheric dynamical problems. Rotation and irregular boundaries typically lead to nonself-adjoint elliptic operators whose matrix representation on the grid is definite but not symmetric. On the other hand, most established methods for solving large sparse matrix equations depend on the symmetry and definiteness of the matrix. Furth… more
Date: March 1, 1994
Creator: Smolarkiewicz, P. K. & Margolin, L. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On the development of boundary layer secondary circulations resulting from horizontally varying surface heat flux

Description: During the last decade there has been a surge in efforts to understand the processes at work in the inhomogeneous atmospheric boundary layer. Much of the interest in the problem has been driven by increasingly urgent needs to develop accurate assessments of man`s Contribution to climate change. It has been argued that subgrid-scale secondary circulations in the boundary layer can cause significant errors in parameterized turbulent surface fluxes. Such circulations -- variously termed ``inland b… more
Date: March 1, 1994
Creator: Shaw, W. J. & Doran, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The atmospheric release advisory capability (ARAC): A federal emergency response capability

Description: The Atmospheric Release Capability (ARAC) is a Department of Energy (DOE)-sponsored emergency-response service set up to provide real-time prediction of the dose levels and the extent of surface contamination resulting from a broad range of possible occurrences (accidents, spills, extortion threats involving nuclear material, reentry of nuclear-powered satellites, and atmospheric nuclear tests) that could involve the release of airborne radioactive material. During the past decade, ARAC has res… more
Date: March 1, 1988
Creator: Dickerson, M. H. & Sullivan, T. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The collected papers of Frederick M. Luther, 1943--1986. Volume 4, 1983--1988

Description: In the sixteen years from completing his Ph.D. to his death in 1986, Fred Luther`s unique combination of scientific insight and personal warmth carried him to the center of an intensifying international effort to better understand atmospheric radiation and its interactions with clouds, aerosols, and gases. His initiation and leadership of the Intercomparison of Radiative Codes in Climate Models (ICRCCM) brought together more than 60 researchers from around the world in an effort to demonstrate … more
Date: March 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development and Testing of an Air Quality Model for Mexico City

Description: Los Alamos National Laboratory and Instituto Mexicano del Petroleo have embarked on a joint study of options for improving air quality in Mexico City. The intent is to develop a modeling system which can address the behavior of pollutants in the region so that option for improving Mexico City air quality can be properly evaluated. In February of 1991, the project conducted a field program which yielded a variety of data which is being used to evaluate and improve the models. Normally the worst … more
Date: March 2, 1992
Creator: Williams, M. D.; Streit, G.; Cruz, X.; Ruiz, M.; Sosa, G.; Russell, A. G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ARM tropical pacific experiment (ATPEX): Role of cloud, water vapor and convection feedbacks in the coupled ocean/atmosphere system. Progress report, September 1, 1991--August 31, 1992

Description: We have initiated studies that include radiation model validation, improved treatment of the three-dimensional structure of cloud-radiation interactions, and sensitivity runs that will unravel the role of cloud-convection-radiation interactions in the Pacific Sear Surface Temperatures and the overlying Walker and Hadley circulation. The research program is divided into three phases: (1) radiation, (2) cloud parameterization issues; (3) feedback and ocean-atmosphere interactions.
Date: March 5, 1992
Creator: Ramanathan, V. & Barnett, T. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary report: STOIC CGCM intercomparison - equatorial sections

Description: An intercomparison and assessment of the tropical behaviour of coupled general circulation models (CGCMs) is being carried out, to identify common strengths and weaknesses and thus guide future CGCM development. The work is being carried out as part of the CLIVAR climate research programme, as a WG-SIP (Working Group on Seasonal to Interannual Prediction) project called STOIC (Study of Tropical Oceans In CGCMs), organised by Michael Davey. This project complements a companion sub-project called… more
Date: March 1, 1999
Creator: Davey, M; Huddleston, M & Sperber, K R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Elevated stratified layers observed during VTMX.

Description: A suite of instrumentation including a minisodar, a low-frequency, single-axis sodar, a wind profiling radar and a tethersonde was used during the Vertical Transport and Mixing field study in Salt Lake City, UT, USA, to study the evolution and dynamics of stratified layers that commonly develop during nighttime. The month-long field study provided ten nights with good conditions for tethersonde flights. The real-time sodar display was used to place the tethersonde within and near the stratified… more
Date: March 14, 2002
Creator: Coulter, R. L.; Pekour, M. S. & Martin, T. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The growth of the oceanic boundary layer during the COARE intensive observational period: Large Eddy simulation results

Description: A principal goal of the Tropical Ocean Global Atmosphere (TOGA) Coupled Ocean-Atmosphere Response Experiment (COARE) is to gain an understanding of the processes that control mixing in the upper 100 m of the western tropical Pacific warm pool. The warm pool is an important heat reservoir for the global ocean and is responsible for many of the observed climatic changes associated with El Nino/Southern Oscillation (ENSO) events. This water mass is highly sensitive to mixed-layer processes that ar… more
Date: March 1, 1995
Creator: Skyllingstad, E. D.; Wijesekera, H. W. & Gregg, M. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of NEXRAD Wind Retrievals as Input to Atmospheric Dispersion Models

Description: The objective of this study is to determine the feasibility that routinely collected data from the Doppler radars can appropriately be used in Atmospheric Dispersion Models (ADMs) for emergency response. We have evaluated the computational efficiency and accuracy of two variational mathematical techniques that derive the u- and v-components of the wind from radial velocities obtained from Doppler radars. A review of the scientific literature indicated that the techniques employ significantly di… more
Date: March 6, 2007
Creator: Fast, Jerome D.; Newsom, Rob K.; Allwine, K Jerry; Xu, Qin; Zhang, Pengfei; Copeland, Jeffrey H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solar semidiurnal tidal wind oscillations above the CART site

Description: Harmonic analysis of wintertime data from 915- and 404-MHz radar wind profilers at four sites in North America has identified coherent semidiurnal wind oscillations through the entire depth of the troposphere. These winds are readily apparent above the CART site, as evidenced from analyses of data from the Haviland, KS, radar profiler. The characteristics of this wind system match the characteristics of solar semidiurnal atmospheric tides, as predicted by a simple dynamic model.
Date: March 1, 1995
Creator: Whiteman, C. D. & Bian, X.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Anisotropic multi-resolution analysis in 2D, application to long-range correlations in cloud mm-radar fields

Description: Because of Earth`s gravitational field, its atmosphere is strongly anisotropic with respect to the vertical; the effect of the Earth`s rotation on synoptic wind patterns also causes a more subtle form of anisotropy in the horizontal plane. The authors survey various approaches to statistically robust anisotropy from a wavelet perspective and present a new one adapted to strongly non-isotropic fields that are sampled on a rectangular grid with a large aspect ratio. This novel technique uses an a… more
Date: March 1, 1999
Creator: Davis, Anthony B. & Clothiaux, Eugene
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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VENTSAR XL - A spreadsheet for analyzing building effects and plume rise

Description: VENTSAR XL is a Microsoft Excel spreadsheet that analyzes flow patterns of pollutants on or near buildings. Plume rise may be considered. This report provides a complete description and verification of all models within VENTSAR XL. User instructions also are included.
Date: March 1, 1997
Creator: Simpkins, A.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Report of preliminary analysis of data from dew-point hygrometer profiles during the ARM 1996 WVIOP

Description: Unique commercial light-weight chilled-mirror dew-point sensors were flown on tethered balloons during the Water Vapor Intensive Operation Period (WVIOP) in September 1996. Comparisons were made between in situ and remote sensing instruments that detect water vapor. We obtained a special waiver to fly the sensors up to 1 km both day and night from the FAA. Preliminary comparisons with tower mounted, surface-based temperature/relative humidity probes, rawinsonde, air-borne chilled-mirror dew poi… more
Date: March 1, 1997
Creator: Porch, W.; Fernandez, A. & Spurgeon, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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