Results 21 to 30 of about 8,133 (257)
Cloud Resolving Modeling of Contrail Evolution
, 2012 Contrails are ice clouds that form behind aircraft. As a result of burning kerosene in the engines, water vapor is emitted that rapidly freezes and forms ice crystals. If the atmosphere is sufficiently moist and cold, these contrails expand and persist for many hours.
Unterstrasser, Simon +2 more
openaire +2 more sources
Journal of Advances in Modeling Earth Systems, 2023 Water isotopes are tracers of convective processes and are often used as proxies for past precipitation. These applications require a better understanding of the impact of convective processes on the isotopic composition of water vapor and precipitation.
Camille Risi +6 more
doaj +1 more source
Predictability of Precipitation in a Cloud-Resolving Model
Monthly Weather Review, 2004 Abstract An ensemble methodology is developed and tested to objectively isolate and quantify meso-β-scale predictability limitations in numerical weather prediction (NWP). The methodology involves conducting an ensemble of limited-area simulations with slightly modified initial conditions (representing small-scale observational uncertainties) and ...
André Walser +2 more
openaire +1 more source
GPU Acceleration of a Cloud Resolving Model using CUDA
Procedia Computer Science, 2012 AbstractThe increasing computing power of graphics processing units (GPU) has motivated the use of GPUs to speed up climate models. Their low price in conjunction with C style parallel programming tools, like CUDA (Compute Unified Device Architecture), allow the programmers, even non-programmers, to exploit the fine grain parallelism power of GPU ...
Hong Zhang, José García
openaire +1 more source
Impact of different definitions of clear-sky flux on the determination of longwave cloud radiative forcing: NICAM simulation results [PDF]
Atmospheric Chemistry and Physics, 2010 Using one month of the cloud-resolving Nonhydrostatic Icosahedral Atmospheric Model (NICAM) simulations, we examined the impact of different definitions of clear-sky flux on the determination of longwave cloud radiative forcing (CRF).
B. J. Sohn +3 more
doaj +1 more source
On the instabilities of tropical cyclones generated by cloud resolving models [PDF]
Tellus A: Dynamic Meteorology and Oceanography, 2018 An approximate method is developed for finding and analysing the main instability modes of a tropical cyclone whose basic state is obtained from a cloud resolving numerical simulation. The method is based on a linearised model of the perturbation dynamics that distinctly incorporates the overturning secondary circulation of the vortex, spatially ...
openaire +2 more sources
Scavenging of aerosol particles by rain in a cloud resolving model [PDF]
Atmospheric Research, 2010 We describe a below-cloud scavenging module of aerosol particles by raindrops for use in a three-dimensional mesoscale cloud resolving model. The rate of particle removal is computed by integrating the scavenging efficiency over the aerosol particle and the drop size distributions.
Berthet, S. +4 more
openaire +3 more sources
Potential Predictability of the Madden‐Julian Oscillation in a Superparameterized Model
Geophysical Research Letters, 2023 The Madden‐Julian Oscillation (MJO) is a promising target for improving sub‐seasonal weather forecasts. Current forecast models struggle to simulate the MJO due to imperfect convective parameterizations and mean state biases, degrading their forecast ...
Sarah Weidman, Zhiming Kuang
doaj +1 more source
Atmosphere, 2018 This sensitivity study examined the impact of drizzle on hailstorm characteristics and precipitation on the ground. A cloud-resolving mesoscale model with a two-moment bulk microphysical scheme is modified by introducing mixing ratio and number ...
Nemanja Kovačević, Katarina Veljovic
doaj +1 more source
tobac 1.2: towards a flexible framework for tracking and analysis of clouds in diverse datasets [PDF]
Geoscientific Model Development, 2019 We introduce tobac (Tracking and Object-Based Analysis of Clouds), a newly developed framework for tracking and analysing individual clouds in different types of datasets, such as cloud-resolving model simulations and geostationary satellite retrievals ...
M. Heikenfeld +6 more
doaj +1 more source