Results 21 to 30 of about 6,134,553 (262)

A simple lightning assimilation technique for improving retrospective WRF simulations

Journal of Advances in Modeling Earth Systems, 2016
Convective rainfall is often a large source of error in retrospective modeling applications. In particular, positive rainfall biases commonly exist during summer months due to overactive convective parameterizations. In this study, lightning assimilation
Nicholas K. Heath, Jonathan E. Pleim, Robert C. Gilliam, Daiwen Kang   +3 more
doaj   +1 more source

Technical challenges and solutions in representing lakes when using WRF in downscaling applications [PDF]

Geoscientific Model Development, 2015
The Weather Research and Forecasting (WRF) model is commonly used to make high-resolution future projections of regional climate by downscaling global climate model (GCM) outputs.
M. S. Mallard, C. G. Nolte, T. L. Spero, O. R. Bullock, K. Alapaty, J. A. Herwehe, J. Gula, J. H. Bowden   +7 more
doaj   +1 more source

Distribution and Causes of Global Forest Fragmentation

Ecology and Society, 2003
Because human land uses tend to expand over time, forests that share a high proportion of their borders with anthropogenic uses are at higher risk of further degradation than forests that share a high proportion of their borders with non-forest, natural ...
Timothy G. Wade, Kurt Riitters, James D. Wickham, K. Bruce Jones   +3 more
doaj   +1 more source

Long-term trends in the ambient PM_2.5- and O₃-related mortality burdens in the United States under emission reductions from 1990 to 2010 [PDF]

Atmospheric Chemistry and Physics, 2018
Concentrations of both fine particulate matter (PM2.5) and ozone (O3) in the United States (US) have decreased significantly since 1990, mainly because of air quality regulations.
Y. Zhang, Y. Zhang, J. J. West, R. Mathur, J. Xing, C. Hogrefe, S. J. Roselle, J. O. Bash, J. E. Pleim, C.-M. Gan, D. C. Wong   +10 more
doaj   +1 more source

A review of literature and computer models on exposure assessment [PDF]

, 2009
At the present time, risk analysis is an effective management tool used by environmental managers to protect the environment from inevitable anthropogenic activities.
Oduyemi, K. O. K., Clark, M., Butt, Talib E., Coulon, F., Oduyemi, K, Coulon, Frederic, Oduyemi, K.O.K., Clark, Michael, Butt, T.E., Butt, T. E., Butt, Talib, Coulon, F   +11 more
core   +1 more source

Global-Scale Patterns of Forest Fragmentation

Ecology and Society, 2000
We report an analysis of forest fragmentation based on 1-km resolution land-cover maps for the globe. Measurements in analysis windows from 81 km 2 (9 x 9 pixels, "small" scale) to 59,049 km 2 (243 x 243 pixels, "large" scale) were used to characterize ...
Kurt Riitters, James D. Wickham, Robert O'Neill, K. Bruce Jones, Elizabeth Smith   +4 more
doaj   +1 more source

A framework for expanding aqueous chemistry in the Community Multiscale Air Quality (CMAQ) model version 5.1 [PDF]

Geoscientific Model Development, 2017
This paper describes the development and implementation of an extendable aqueous-phase chemistry option (AQCHEM − KMT(I)) for the Community Multiscale Air Quality (CMAQ) modeling system, version 5.1.
K. M. Fahey, A. G. Carlton, H. O. T. Pye, J. Baek, W. T. Hutzell, C. O. Stanier, K. R. Baker, K. W. Appel, M. Jaoui, J. H. Offenberg   +9 more
doaj   +1 more source

Environmental Exposure and Leptospirosis, Peru

Emerging Infectious Diseases, 2004
Human infection by leptospires has highly variable clinical manifestations, which range from subclinical infection to fulminant disease. We conducted a population-based, cross-sectional seroepidemiologic study in Peru to determine potential relationships of environmental context to human exposure to Leptospira and disease associated with seroconversion.
Johnson, MAS, Smith, H, Joseph, P, Gilman, R H, Bautista, C T, Campos, K J, Cespedes, M, Klatsky, P, Vidal, C, Terry, H, Calderon, M M, Coral, C, Cabrera, L, Parmar, P S, Vinetz, Joseph M   +14 more
openaire   +4 more sources

Flood Exposure of Environmental Assets

Natural Hazards and Earth System Sciences, 2023
Abstract. Environmental assets provide important benefits to society and support the equilibrium of natural processes. They can be affected by floods; however, flood risk analyses usually neglect environmental areas due to (i) a lack of agreement on what should be considered an environmental asset, (ii) a poor understanding of environmental values, and
Gabriele Bertoli, Chiara Arrighi, Enrica Caporali   +2 more
openaire   +5 more sources

Development and evaluation of a physics‐based windblown dust emission scheme implemented in the CMAQ modeling system

Journal of Advances in Modeling Earth Systems, 2017
A new windblown dust emission treatment was incorporated in the Community Multiscale Air Quality (CMAQ) modeling system. This new model treatment has been built upon previously developed physics‐based parameterization schemes from the literature.
H. Foroutan, J. Young, S. Napelenok, L. Ran, K. W. Appel, R. C. Gilliam, J. E. Pleim   +6 more
doaj   +1 more source