Jimy Dudhia

Jimy Dudhia
National Center for Atmospheric Research · Mesoscale and Microscale Meteorology Laboratory

Ph. D.

About

282
Publications
106,372
Reads
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50,664
Citations
Introduction
Jimy Dudhia currently works at the Mesoscale and Microscale Meteorology Laboratory, National Center for Atmospheric Research. Jimy does research in Meteorology.
Additional affiliations
June 1989 - present
National Center for Atmospheric Research
Position
  • Project Scientist
November 1985 - June 1989
Pennsylvania State University
Position
  • Research Associate
October 1980 - October 1985
Imperial College London
Position
  • Research Assistant
Education
September 1980 - March 1984
Imperial College London
Field of study
  • Meteorology
September 1979 - September 1980
Imperial College London
Field of study
  • Atmospheric Physics and Dynamics
October 1976 - June 1979
Imperial College London
Field of study
  • Physics

Publications

Publications (282)
Article
In the present study, we conducted four idealized hurricane large-eddy simulation cases to investigate the size characteristics of the different radius of maximum wind (RMW) of hurricanes at different intensity levels. The RMW shows different characteristics for different grid resolutions and hurricane intensities, which shows a similar trend to ab...
Article
In this study, the wind disasters caused by typhoons that have led to landfall in China during 2004–2020 were investigated using the radial integral method of wind disaster assessment. The typhoon parameters were mainly obtained from China Meteorological Administration. Results from the Joint Typhoon Warning Center and Japan Meteorological Agency w...
Article
Full-text available
Climate variability and change greatly affect agricultural and water resource management over West Africa. This paper presents the current characteristics and projected change in regional crop water demand (CWD), irrigation requirement (IR), and water availability (WA) over West Africa. Observed and simulated daily rainfall, minimum temperature, ma...
Article
Full-text available
The role of topography in the diurnal cycle of precipitation is analyzed during the propagation of a Madden-Julian Oscillation (MJO) event over the Islands of the Maritime Continent using cloud-permitting simulations. The control simulation (CTL) using realistic topography captures the timing, magnitude, and location of the observed diurnal cycle o...
Article
In the current study, we conducted four idealized hurricane simulation cases to investigate the basic wind characteristics of hurricanes at different sea surface temperatures. First, the relationship of the minimum of sea surface pressure and the maximum of time-averaged wind speed shows good agreement with observational data and theoretical consid...
Article
In spite of WRF-Solar being a numerical weather prediction (NWP) model specifically tailored for solar energy applications, the model lacks a specific cloud initialization component to improve short-range predictions. To overcome this limitation we have combined the fundamental concepts of the Multi-sensor Advection Diffusion nowCast (MADCast) mode...
Article
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This research investigated the effects of Land Use Land Cover Change (LULCC) over the Sokoto Rima River Basin (SRRB) using a setup of Weather Research and Forecasting (WRF) atmospheric model to generate the parameters to force WRF hydrological (WRF-Hydro) model which comprises of a parent domain at 12km horizontal resolution with an updated MODIS L...
Article
Full-text available
The study validated the use of an updated MCD12Q1 MODIS Land Use Land Cover (LULC) data into Weather Research and Forecasting (WRF) model and investigated the effects of LULC change on the spatiotemporal pattern of dew point temperature (DPT), temperature, precipitation and some associated parameters over West Africa (WA). Series of WRF model simul...
Article
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The extreme rainfall during 21–22 July 2012 brought the heaviest rain to Beijing (190 mm) and Fangshan (460 mm) in six decades, which caused widespread damage in the city and its surroundings. To understand the evolution of spatio-temporal variability of precipitation and to quantify the inherent uncertainties in short-range weather forecasts of su...
Article
WRF-Solar is a numerical weather prediction (NWP) model specifically designed to meet the increasing demand for accurate solar irradiance forecasting. The model provides flexibility in the representation of the aerosol-cloud-radiation processes. This flexibility can be argued to make more difficult to improve the model’s performance due to the nece...
Article
Full-text available
This study examines current and future western U.S. snowfall and snowpack through current and future climate simulations with a 4-km horizontal grid spacing cloud permitting regional climate model over the entire CONtinental U.S. for a 13-year period between 2001 and 2013. At this horizontal resolution, the spatiotemporal distribution of the orogra...
Article
Full-text available
Precipitation cools the surface because the temperature of raindrops is typically lower than the temperature of the surface. While this precipitation‐induced sensible heat flux (QP) due to the temperature difference between the surface and raindrops is thought to be small and is typically ignored in weather and climate models. However, there are ma...
Article
Full-text available
Plain Language Summary Regional and global models are the two major tools to study and forecast weather and climate. Both types of models have advantages and disadvantages concerning horizontal resolution, area coverage, model physics and computational cost, among others. Another type of model configuration is a channel model, which is defined as z...
Article
A new, computationally efficient Semi-Lagrangian advection (SLA) scheme was used to simulate an idealized supercell storm using WRF coupled with Spectral (bin) Microphysics (SBM). SLA was developed to make complicated microphysical schemes more computationally accessible to cloud resolving models. The SLA is a linear combination of Semi-Lagrangian...
Article
Uncertainty in predicting solar energy resources introduces major challenges in power system management and necessitates the development of reliable probabilistic solar forecasts. As the first part of the development of probabilistic forecasts based on the Weather Research and Forecasting model with solar extensions (WRF-Solar), this study presents...
Article
Full-text available
Using data for 3 days in the Cooperative Atmosphere-Surface Exchange Study 1997 field experiment that are analyzed in LeMone et al. (Boundary-Layer Meteorol 104:1–52, 2002, hereafter L2002), it is shown that direct radiative heating can have a significant role in warming the nearly cloudless fair-weather convective boundary layer (CBL). Radiative h...
Article
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The land-sea contrast in the Maritime Continent (MC) has been found to influence the Madden–Julian Oscillation (MJO). However, the specific contribution from individual islands to the precipitation over the surrounding islands during MJO propagation is not well known. We found that when an island is removed in the presence of lower-tropospheric wes...
Article
A set of numerical experiments was conducted in order to investigate the impacts of global warming on West African monsoon rainfall for selected five years. The experiments varied different cumulus, microphysics and planetary boundary layer parameterization schemes. Rainfall characteristics over three climatic zones, Guinea Coast, Savannah and Sahe...
Article
Improving the forecasting and communication of weather hazards such as urban floods and extreme winds has been recognized by the World Meteorological Organization (WMO) as a priority for international weather research. The WMO has established a 10-yr High-Impact Weather Project (HIWeather) to address global challenges and accelerate progress on sci...
Article
Full-text available
Idealized hurricanes are studied at four different sea surface temperatures (SSTs) of 26°, 27°, 28°, and 29°C in six nested domains down to 62‐m grid size. For the maximum and the distribution of wind speed, domain D6 (62 m) is similar to domain D5 (185 m) showing convergence near 200 m. For SST of 26°, domain D5 does not have small‐scale turbulenc...
Article
Full-text available
Simulations with four land surface models (LSMs) (i.e., Noah, Noah-MP, Noah-MP with ground water GW option, and CLM4) using the Weather Research and Forecasting (WRF) model at 12 km horizontal grid resolution were carried out as two sets for 3 months (December–February 2011/2012 and July–September 2012) over West Africa. The objective is to assess...
Article
Full-text available
The single layer urban canopy model TEB (Town Energy Balance) is coupled to the Weather Research and Forecasting (WRF) model (WRF-TEB). The main conceptual, technical, and testing methodologies are discussed, and a Singularity image to achieve Practical Computational Reproducibility (PCR) on local, and high-performance computing (HPC) systems is pr...
Article
Full-text available
Irrigation is a method of land management that can affect the local climate. Recent literature shows that it affects mostly the near-surface variables and it is associated with an irrigation cooling effect. However, there is no common parameterization that also accounts for a realistic water amount, and this factor could ascribe one cause to the di...
Article
Full-text available
A new hybrid, sigma-pressure vertical coordinate was recently added to the Weather Research and Forecasting (WRF) model in an effort to reduce numerical noise in the model equations near complex terrain. Testing of this hybrid, terrain-following coordinate was undertaken in the WRF-based Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR)...
Article
Irrigation is crucial in sustaining food production and it is found to have a cooling effect. Changes at the surface affect both the circulation and the precipitation. The magnitude depends on the model used, the irrigation description and the water amount, as well as the region. The study focuses on northern Italy (the Po Valley) due to its vulner...
Article
Full-text available
Irrigation is crucial for sustaining agriculture in certain regions; however, there are effects on the local climate. Previous studies discussed that the irrigation signal might depend on the geographical region as well as the synoptic and climatic conditions. The work presented here aims to investigate the mechanisms behind changes in the irrigati...
Article
Full-text available
A modified Fast Spectral Bin Microphysics scheme (FSBM‐2) embedded into the Weather Research and Forecasting (WRF) model is used to simulate a mesoscale deep convective system observed during the Midlatitude Continental Convective Clouds Experiment (MC3E). FSBM‐2 uses modified source codes as compared to the current FSBM (FSBM‐1). In contrast to FS...
Article
Full-text available
This paper presents an evaluation of the Weather Research and Forecasting (WRF) model in simulating wet and dry West African monsoon (WAM) rainfall seasons. Three model experiments with varying selected microphysics (MP), cumulus convection (CU), and planetary boundary layer (PBL) schemes based on previous study were performed. Each of the model co...
Article
Full-text available
Irrigation is one of the land managements that can affect the local climate. Recent literature shows that it affects mostly the near-surface variables and it is associated with an irrigation cooling effect. However, there is no common parameterization that also accounts for a realistic water amount, and these factors could be ascribed as causes of...
Presentation
Full-text available
Modeling Aerosol Optical Depth over the Arabian Desert for Solar Irradiance Forecasting: Under clear-sky conditions, one of the largest sources of error for predictions of solar irradiance and solar power is the aerosol optical depth (AOD). Direct normal irradiance (DNI) is particularly sensitive to AOD, while global horizontal irradiance (GHI) is...
Article
This study presents a systematic analysis of convective parameterizations performance with interactive radiation, microphysics, and surface on an idealized day with shallow convection. To this end, we analyze a suite of mesoscale numerical experiments (i.e., with parameterized turbulence). In the first set, two different convection schemes represen...
Article
Full-text available
A 2-month (August–September) regime of the year 2007 West African monsoon (WAM) was simulated with 27 physics combinations using the Weather Research and Forecasting model at 20-km horizontal grid. The objective is to examine WAM sensitivity to parameterization of microphysical, convective, and boundary layer processes for long-term simulation. The...
Article
Over the last 100 years, boundary layer meteorology grew from the subject of mostly near-surface observations to a field encompassing diverse atmospheric boundary layers (ABLs) around the world. From the start, researchers drew from an ever-expanding set of disciplines—thermodynamics, soil and plant studies, fluid dynamics and turbulence, cloud mic...
Article
A combination of turbulence-resolving large-eddy simulations and observations are used to examine the influence of swell amplitude and swell propagation angle on surface drag. Based on the analysis a new surface roughness parameterization with nonequilibrium wave effects is proposed. The surface roughness accounts for swell amplitude and wavelength...
Poster
The improved forecasting and communication of weather hazards such as urban floods and localized extreme wind remains a complex global challenge. This has recently been recognized by the World Meteorological Organization (WMO) as a priority for international weather research, through the establishment of the “HIWeather” project. In this presentatio...
Conference Paper
Full-text available
Two advanced bulk cloud microphysics schemes, namely, Thompson and Morrison schemes, are evaluated based on observations gathered from the Tropical Warm Pool International Cloud Experiment (TWP-ICE). Because of large uncertainties related to observational retrievals during the "wet" monsoon period (January 17-25, 2006), we have focused on the subse...
Article
The wind stress formulation in an atmospheric model over shallow waters is investigated using year-long observations of the wind profile within the first 100 m of the atmosphere and mesoscale simulations. The model experiments use a range of planetary boundary layer parameterizations to quantify the uncertainty related to the turbulent closure assu...
Article
Full-text available
Orographic precipitation and snowpack provide a vital water resource for the western U.S., while convective precipitation accounts for a significant part of annual precipitation in the eastern U.S. As a result, water managers are keenly interested in their fate under climate change. However, previous studies of water cycle changes in the U.S. have...
Article
Cold air outbreaks can bring snow to populated areas and can affect aviation safety. Shortcomings in the representation of these phenomena in global and regional models are thought to be associated with large systematic cloud related radiative flux errors across many models. In this study, nine regional models have been used to simulate a cold air...
Article
The Madden-Julian Oscillation (MJO) is an important source of predictability. The boreal 2004-05 winter is used as a case study to conduct predictability experiments with the Weather Research and Forecasting (WRF) model. That winter season was characterized by an MJO event, weak El Niño, strong North Atlantic Oscillation and extremely wet condition...
Article
Full-text available
It is a common practice to use 3D General Circulation Models (GCM) with spatial resolution of a few hundred kilometers to simulate the climate of Earth-like exoplanets. The enhanced albedo effect of clouds is especially important for exoplanets in the habitable zones around M dwarfs that likely have fixed substellar regions and substantial cloud co...
Article
Full-text available
The National Centre for Environmental Prediction (NCEP) Climate Forecast System (CFS) is being used for operational monsoon prediction over the Indian region. Recent studies indicate that the moist convective process in CFS is one of the major sources of uncertainty in monsoon predictions. In this study, the existing simple cloud microphysics of CF...
Article
Since its initial release in 2000, the Weather Research and Forecasting (WRF) Model has become one of the world’s most widely used numerical weather prediction models. Designed to serve both research and operational needs, it has grown to offer a spectrum of options and capabilities for a wide range of applications. In addition, it underlies a numb...
Article
Full-text available
The spread of a dense gas in the atmosphere is a phenomenon that occurs widely with natural (and anthropogenic) causes and is often associated with high impact and hazardous events. In this study a method of simulating the spread of dense gases in a numerical weather prediction model is presented. This approach has the advantage that dense gases ca...
Article
Nepal has been the location of a series of fatal aircraft accidents, raising serious concerns about civil aviation security and the safety of passengers. However, significant studies on weather patterns associated with the airports and air routes of the Himalayan complex terrain and their implications for aviation activities are yet to be carried o...
Research
Full-text available
Acknowledging the challenge of simulating the mean and intraseasonal variability of Indian Summer monsoon by a coupled climate model CFSv2 (originally adopted from NCEP, USA), a holistic and thorough approach through modifying physical processes namely the cloud and convection is being presented in this report. Considering the CFSv2 systematic bi...
Article
Full-text available
SST-forced tropical-channel simulations are used to quantify the control of shortwave (SW) parameterization on the mean tropical climate compared to other major model settings (convection, boundary layer turbulence, vertical and horizontal resolutions), and to pinpoint the physical mechanisms whereby this control manifests. Analyses focus on the sp...
Article
Full-text available
The November event of the Madden-Julian Oscillation (MJO) during the DYNAMO field campaign was simulated using the global compressible nonhydrostatic Model for Prediction Across Scales (MPAS) with global coarse (60 and 15 km) and regional (the Indian Ocean) cloud-permitting (3 km) meshes. The purpose of this study is to compare roles of parameteriz...
Article
Full-text available
WRF-Solar is a specific configuration and augmentation of the Weather Research and Forecasting (WRF) model designed for solar energy applications. Recent upgrades to the WRF model contribute to making the model appropriate for solar power forecasting, and comprise 1) developments to diagnose internally relevant atmospheric parameters required by th...
Article
Radiative transfer (RT) models simulating broadband solar radiation have been widely used by atmospheric scientists to model solar resources for various energy applications such as operational forecasting. Due to the complexity of solving the RT equation, the computation under cloudy conditions can be extremely time consuming though many approximat...
Article
Full-text available
This study assesses the impact of the atmospheric stability on the turbulent orographic form drag (TOFD) generated by unresolved small-scale orography (SSO) focusing on surface winds. With this aim, several experiments are conducted with the Weather Research and Forecasting (WRF) Model and they are evaluated over a large number of stations (318 at...