A5036756835- Climate variability and models
- Meteorological Phenomena and Simulations
- Hydrology and Drought Analysis
- Climate change impacts on agriculture
- Aquatic Ecosystems and Biodiversity
- Hydrology and Watershed Management Studies
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- GNSS positioning and interference
- Tropical and Extratropical Cyclones Research
- Oceanographic and Atmospheric Processes
- Aquatic Ecosystems and Phytoplankton Dynamics
- Plant Water Relations and Carbon Dynamics
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Agricultural risk and resilience
- Soil Moisture and Remote Sensing
- Ionosphere and magnetosphere dynamics
- Water-Energy-Food Nexus Studies
- Plant Ecology and Soil Science
- Flood Risk Assessment and Management
- Solar Radiation and Photovoltaics
- Cryospheric studies and observations
- Transboundary Water Resource Management
- Groundwater flow and contamination studies
University of Connecticut
2013-2023
Louisiana Department of Natural Resources
2012-2022
Rutgers, The State University of New Jersey
2006-2008
North Carolina State University
2004-2006
Using a coupled regional climate‐hydrologic modeling system, RAMS‐Hydro, we investigate the role of water table dynamics in controlling soil moisture, evapotranspiration (ET), boundary layer dynamics, and precipitation. In an earlier study showed that shallow can primarily exist two types hydrologic settings North America: humid river valleys coastal regions east arid or semiarid intermountain west. We also these lead to significantly wetter soils than would without presence table. Here,...
We analyze the potential effect of global warming levels (GWLs) 1.5 °C and 2 above pre-industrial (1861−1890) on mean temperature precipitation as well intra-seasonal extremes over Greater Horn Africa. used a large, 25-member regional climate model ensemble from Coordinated Regional Downscaling Experiment show that, compared to control period 1971−2000, annual near-surface is projected increase by more than 1 most parts Africa, under GWLs respectively. The highest increases are in northern...
Abstract A fully coupled regional climate, 3D lake modeling system is used to investigate the physical mechanisms associated with multiscale variability of Lake Victoria basin climate. To examine relative influence different processes on a suite model experiments were performed by smoothing topography around basin, altering surface characteristics, and reducing or increasing amount large-scale moisture advected into region through four lateral boundaries domain. Simulated monthly mean...
Abstract The International Center for Theoretical Physics (ICTP) regional climate model version 3 (ICTP‐RegCM3) multiyear simulations of East Africa rainfall during the October–December, short rains season are evaluated. Two parallel runs; based on NCEP reanalysis and NASA FvGCM lateral boundary conditions performed. simulated monthly seasonal climatology as well interannual variability found to be fairly consistent with observations. over specific homogeneous subregions, except central...
Abstract Characteristic patterns and changes in precipitation temperature over the Greater Horn of Africa during 20th 21st century are analysed based on a sample Coupled Model Intercomparison Project version 3 (CMIP3) models output. Analysis 11 CMIP3 indicates that equatorial eastern region (including entire (GHA)) have been experiencing significant increase beginning early 1980s, both A1B A2 scenarios. All Atmosphere Ocean Global Circulation Models (AOGCMs) represent correct mean annual...
R e s a r c h 4 9 (1 2) , p p. 8 1 6 0-8 7 3.
Abstract Linkages between dominant spatio‐temporal decadal rainfall variability modes and the global sea surface temperature (SST) are investigated over East Africa region for period 1950–2008. Singular value decomposition (SVD) canonical correlation analysis (CCA) techniques employed to examine potential linkages predictability of region. When ten‐year periodicity is filtered out from observed monthly data, distinct regimes exhibited in time series mean seasonal anomalies. Spectral density...
Abstract This study examines the effects of 1.5 °C and 2 global warming levels (GWLs) on intra-seasonal rainfall characteristics over Greater Horn Africa. The impacts are analysed based outputs a 25-member regional multi-model ensemble from Coordinated Regional Climate Downscaling Experiment project. climate models were driven by Coupled Model Intercomparison Project Phase 5 Global Models for historical future (RCP8.5) periods. We analyse three major seasons region, namely March–May,...
Abstract In this study, we take an ensemble modeling approach using the regional climate model RegCM4.3.4‐CLM‐CN‐DV (RCM) to study impact of including vegetation dynamics on performance in simulating present‐day and future projections over West Africa. The consists four global models (GCMs) as lateral boundary conditions for RCM, simulations with both static dynamic are conducted. results demonstrate substantial sensitivity simulated precipitation, evapotranspiration, soil moisture...
ABSTRACT Previous studies suggest that climate change impacts significantly on the hydro‐climatic processes within Ganges–Brahmaputra–Meghna ( GBM ) River Basin RB ). This study examines observed characteristics and potential strengths limitations of three global high‐resolution reanalyses satellite remote‐sensing products over for period 1980–2013 by (1) estimating trends interannual variations precipitation temperature, (2) isolating likely associated with El Niño Southern Oscillation ENSO...
Abstract This study explores, through three‐dimensional (3D)‐lake model simulations, the unique thermodynamic and hydrodynamic characteristics of Lake Victoria that can potentially modulate lake catchment climate. The simulations are mostly based on idealized forcing due to lack sufficient observed data. A suite with an elliptic (oval) geometry prescribed wind speed (surface stress), lake–atmosphere temperature difference vertical profile performed. time evolutions as well currents...
Concepts in atmospheric and environmental sciences are intimately connected, but the two disciplines often treated as if they only thinly interrelated. Atmospheric Science for Environmental Scientists dispenses with such unrealistic separations between atmosphere environment by delving into concepts that link dynamics, chemistry, dispersion to environment. With a fashionable consistent layout, book comprises 11 well‐written chapters contributed renowned experts air pollution, climate change...
Abstract Climate variability over Senegal (West Africa) and its relationship to global climate are examined for the period 1979–1998. Monthly observed rainfall 20 stations monthly CPC merged analysis precipitation (CMAP) were averaged months of June, July, August, September in order generate seasonal totals wet season, as well indices study period. The spatial distribution patterns mapped analyzed using ArcGIS Spatial Analyst. Rainfall is dominated by a N–S gradient. To investigate Senegal,...
Abstract Radiosonde data are important for understanding and monitoring the upper troposphere lower stratosphere (UTLS) region. Over much of Africa, however, such lacking; consequently, African UTLS is understudied, potential proxies as climate models reanalysis products fail to fully capture behavior UTLS. This study pioneers use Global Navigation Satellite System‐Radio Occultation (GNSS‐RO) from 2001 2020 address radiosonde gap over Africa contributes a better tropopause (TP)...