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Incorporation of 3D Shortwave Radiative Effects within the Weather Research and Forecasting Model

Description: A principal goal of the Atmospheric Radiation Measurement (ARM) Program is to understand the 3D cloud-radiation problem from scales ranging from the local to the size of global climate model (GCM) grid squares. For climate models using typical cloud overlap schemes, 3D radiative effects are minimal for all but the most complicated cloud fields. However, with the introduction of ''superparameterization'' methods, where sub-grid cloud processes are accounted for by embedding high resolution 2D cl… more
Date: March 18, 2005
Creator: O'Hirok, W.; Ricchiazzi, P. & Gautier, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Worldwide Historical Estimates of Leaf Area Index, 1932-2000

Description: Approximately 1000 published estimates of leaf area index (LAI) from nearly 400 unique field sites, covering the period 1932-2000, have been compiled into a single data set. LA1 is a key parameter for global and regional models of biosphere/atmosphere exchange of carbon dioxide, water vapor, and other materials. It also plays an integral role in determining the energy balance of the land surface. This data set provides a benchmark of typical values and ranges of LA1 for a variety of biomes and … more
Date: February 6, 2002
Creator: Scurlock, J. M. O; Asner, G. P. & Gower, S. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

UGEC Viewpoints, No. 2, September 2009

Description: Urbanization is a global phenomenon that has transformed and continues to alter landscapes and the ways in which societies function and develop. For this issue of UGEC Viewpoints, the editors collected case-studies presented at the Open Meeting that span across regions and themes: from Australia and the United States, as well as the less developed nations in Africa, megacities of Asia such as Dhaka, Bangladesh and Delhi, India, vulnerable coastal areas of the Yucatan Peninsula, and the largest … more
Date: September 2009
Creator: Urbanization and Global Environmental Change Project
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

Estimating Buruli Ulcer Prevalence in Southwestern Ghana

Description: Mycobacterium ulcerans is sweeping across sub-Saharan Africa, but little is known about the mode of transmission and its natural reservoirs. Since the only effective treatment is excision of the infection and surrounding tissue, early diagnosis and treatment is the only way to reduce the havoc associated with Buruli ulcer. Using data from a national case search survey conducted in Ghana during 2000 and suspected risk factors this study tests the hypothesized factors and probes the challenges of… more
Date: August 2007
Creator: Denton, Curtis James
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Annotated Bibliography of the Potential Environmental Impacts of Chlorination and Disinfection Byproducts Relevant to Offshore Liquefied Natural Gas Port Facilties

Description: Annotated bibliography on the environmental consequences for larval/juvenile fishes and important invertebrates when chlorinated water and other toxic disinfection byproducts from offshore, open-loop water circulation systems are discharged into the surrounding marine environment.
Date: December 2006
Creator: Shaw, Richard F. & Baggett, Kevin W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Global and Regional Ecosystem Modeling: Databases of Model Drivers and Validation Measurements

Description: Understanding global-scale ecosystem responses to changing environmental conditions is important both as a scientific question and as the basis for making policy decisions. The confidence in regional models depends on how well the field data used to develop the model represent the region of interest, how well the environmental model driving variables (e.g., vegetation type, climate, and soils associated with a site used to parameterize ecosystem models) represent the region of interest, and how… more
Date: March 19, 2002
Creator: Olson, R.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Updating System for the Gridded Population Database of China Based on Remote Sensing, GIS and Spatial Database Technologies

Description: Describes the development of a Spatial Population Updating System (SPUS) for updating the gridded population database of China based on remote sensing, GIS and spatial database technologies, with a spatial resolution of 1 km by 1 km.
Date: February 20, 2009
Creator: Yang, Xiaohuan; Huang, Yaohuan; Dong, Pinliang; Jiang, Dong & Liu, Honghui
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
open access

Landscape forest modeling of the Luquillo Experimental Forest, Puerto Rico.

Description: This thesis contributes to modeling the dynamics of forest community response to environmental gradients and disturbances over a mountain landscape. A gap model (FACET) was parameterized for species of various forest types (Tabonuco, Colorado, Dwarf and Palm), for many terrain conditions and was modified and extended to include species response to excess soil moisture and hurricanes. Landscape cover types were defined by dominance of species of each forest type and canopy height. Parameters of … more
Date: December 2002
Creator: Abbott-Wood, Chris
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Modeling the impact of sea-spray on particle concentrations in a coastal city

Description: An atmospheric chemistry-transport model is used to assess the impacts of sea-spray chemistry on the particle composition in and downwind of a coastal city--Vancouver, British Columbia. Reactions in/on sea-spray affect the entire particle ensemble and particularly the size distribution of particle nitrate. Urban air quality, and particularly airborne particles, is a major concern in terms of human health impacts. Sea-spray is known to be a major component of the particle ensemble at coastal sit… more
Date: April 19, 2006
Creator: Pryor, S C; Barthelmie, R J; Schoof, J T; Binkowski, F S; Monache, L D & Stull, R B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Revisiting Aldo Leopold's "Perfect" Land Health: Conservation and Development in Mexico's Rio Gavilan

Description: The Rio Gavilan watershed, located in Mexico 's northern Sierra Madre Occidental , has significance in conservation history. Upon visiting the remote, largely un­developed watershed during two hunting trips in the 1930s, renowned conservationist Aldo Leopold thought it was the best picture of land health he had seen. His main indicators of healthy land were slow water runoff rates regulating erosion and historical predator-prey relationships. The visits confirmed Leopold's concept of land h… more
Date: December 2004
Creator: Forbes, William
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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