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Article
Open AccessSINGV-RCM: the convection-permitting regional climate model for Singapore
The development of the Singapore regional climate model (SINGV-RCM) is documented in this study. The model’s skill in predicting mean and extreme rainfall over the Maritime Continent at 8 km and 2 km grid reso...
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Article
Open AccessRecent changes in the climatological characteristics of daily contiguous rain areas over India
This study documents the climatological feature (1951–1980) and recent changes (1981–2020) in rainfall characteristics considering the observed nearly full spectrum of rain event sizes (daily contiguous rain a...
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Article
Indian summer monsoon simulations in successive generations of the NCAR Community Atmosphere Model
Four generations of the NCAR Community Atmosphere Model (CAM3, 4, 5, and 6) are used to assess model upgrades to the Indian summer monsoon rainfall (ISMR) simulations. The total precipitation simulation in CAM...
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Article
Understanding Dynamical Properties of Cumulus Clouds Over the Bay of Bengal
An idealized large eddy simulation (LES) has been performed to understand the dynamics of cumulus clouds over the Bay of Bengal using the Weather Research and Forecasting (WRF) model. Cumulus clouds play a key...
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Article
Open AccessSeasonal dependent suitability of physical parameterizations to simulate precipitation over the Himalayan headwater
The Himalayan ecosystem is fragile and needs robust management strategies for sustainability of natural resources such as water and vegetation. Therefore, reliable precipitation estimation becomes quite import...
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Chapter and Conference Paper
Study of Entrainment Characteristics in Shallow Cumulus Clouds using Large Eddy Simulation
Atmospheric convection is an important process for weather and climate, and is mostly parametrized in global and regional climate models, frequently based on mass flux approach. Fractional entrainment rate is ...
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Article
Impact of Stochastic Entrainment in the NCAR CAM Deep Convection Parameterization on the Simulation of South Asian Summer Monsoon
Model simulations are highly sensitive to the formulation of the atmospheric mixing process or entrainment in the deep convective parameterizations used in their atmospheric component. In this paper, we have i...
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Article
Open AccessResponse of the Indian summer monsoon to global warming, solar geoengineering and its termination
The response of the Indian Summer Monsoon (ISM) to global warming, solar geoengineering and its termination is examined using the multi-model mean of seven global climate model simulations from G2 experiment o...
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Article
Open AccessUncertainty quantification based cloud parameterization sensitivity analysis in the NCAR community atmosphere model
Using uncertainty quantification techniques, we carry out a sensitivity analysis of a large number (17) of parameters used in the NCAR CAM5 cloud parameterization schemes. The LLNL PSUADE software is used to i...
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Article
Can stratospheric geoengineering alleviate global warming-induced changes in deciduous fruit cultivation? The case of Himachal Pradesh (India)
Using Hadley Global Environment Model 2 - Earth System and Max Planck Institute Earth System Model simulations, we assess the impact of global warming and stratospheric geoengineering on deciduous fruit produc...
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Article
Past and future climate change over the Himalaya–Tibetan Highland: inferences from APHRODITE and NEX-GDDP data
The Himalaya–Tibetan Highland (HTH) is highly vulnerable to climate change for multiple reasons. In this work, we present past and future changes in HTH climate, using temperature and precipitation from APHROD...
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Article
Open AccessNumerical Modeling of the Dynamics of Malaria Transmission in a Highly Endemic Region of India
Using a dynamical model (VECTRI) for malaria transmission that accounts for the influence of population and climatic conditions, malaria transmission dynamics is investigated for a highly endemic region (state...
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Article
Long-term cloud fraction biases in CMIP5 GCMs over India during monsoon season
Using 24 years of cloud fraction (CF) data from the International Satellite Cloud Climatology Project (ISCCP) observations and their corresponding simulators in general circulation models (GCMs) from the Coupl...
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Article
Open AccessPrecipitation Biases in CMIP5 Models over the South Asian Region
Using data from 33 models from the CMIP5 historical and AMIP5 simulations, we have carried out a systematic analysis of biases in total precipitation and its convective and large-scale components over the sout...
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Article
Performance of CMIP5 models in the simulation of Indian summer monsoon
In this paper, the fidelity of 28 models under Coupled Model Inter-comparison Project Phase-5 is examined for the Indian summer monsoon for the historical period from 1975 to 2005. It is found that all models ...
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Article
Importance of the resolution of surface topography vis-à-vis atmospheric and surface processes in the simulation of the climate of Himalaya-Tibet highland
As Himalaya-Tibet Highland (HTH), a spatially extensive and complex terrain, plays influential roles in the regional and global climate, its representation in climate models is a decisive factor in climate sim...
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Article
Historical simulations and climate change projections over India by NCAR CCSM4: CMIP5 vs. NEX-GDDP
A new bias-corrected statistically downscaled product, namely, the NASA Earth Exchange Global Daily Downscaled Projections (NEX-GDDP), has recently been developed by NASA to help the scientific community in cl...
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Article
Open AccessFidelity of CMIP5 multi-model mean in assessing Indian monsoon simulations
Considering the wide use of the multi-model mean (MMM) on the seasonal time scale, this work examines its fidelity in simulating some important characteristics of the Indian summer monsoon using Coupled Model ...
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Article
CMIP5 vs. CORDEX over the Indian region: how much do we benefit from dynamical downscaling?
Given the general notion that dynamical downscaling leads to added accuracy in both historical simulations as well as climate change projections, this paper investigates its validity over India using historica...
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Article
Open AccessIndian Summer Monsoon Simulations: Usefulness of Increasing Horizontal Resolution, Manual Tuning, and Semi-Automatic Tuning in Reducing Present-Day Model Biases
Coupled Global Climate Models (CGCMs) of the Coupled Model Intercomparison Project Phase 5 (CMIP5) are unable to resolve the spatial and temporal characteristics of the South Asian Monsoon satisfactorily. A CG...
