Results 21 to 30 of about 8,133 (262)

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

Modeling springtime shallow frontal clouds with cloud‐resolving and single‐column models [PDF]

Journal of Geophysical Research: Atmospheres, 2005
This modeling study compares the performance of eight single‐column models (SCMs) and four cloud‐resolving models (CRMs) in simulating shallow frontal cloud systems observed during a short period of the March 2000 Atmospheric Radiation Measurement (ARM) intensive operational period. Except for the passage of a cold front at the beginning of this period,
Kuan‐Man Xu, Minghua Zhang, Zachary A. Eitzen, Steven J. Ghan, Stephen A. Klein, Xiaoqing Wu, Shaocheng Xie, Mark Branson, Anthony D. Del Genio, Sam F. Iacobellis, Marat Khairoutdinov, Wuyin Lin, Ulrike Lohmann, David A. Randall, Richard C. J. Somerville, Yogesh C. Sud, Gregory K. Walker, Audrey Wolf, J. John Yio, Junhua Zhang   +19 more
openaire   +1 more source

Impact of Drizzle-Sized Cloud Particles on Production of Precipitation in Hailstorms: A Sensitivity Study

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, P. J. Marinescu, M. Christensen, D. Watson-Parris, F. Senf, S. C. van den Heever, P. Stier   +6 more
doaj   +1 more source

Multilayer cloud conditions in trade wind shallow cumulus – confronting two ICON model derivatives with airborne observations [PDF]

Geoscientific Model Development, 2020
Airborne remote sensing observations over the tropical Atlantic Ocean upstream of Barbados are used to characterize trade wind shallow cumulus clouds and to benchmark two cloud-resolving ICON (ICOsahedral Nonhydrostatic) model simulations at kilometer ...
M. Jacob, P. Kollias, P. Kollias, F. Ament, V. Schemann, S. Crewell   +5 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, Daniel Lüthi, Christoph Schär   +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

Evaluating Mean State Cloud Properties in the Simple Cloud‐Resolving E3SM Atmosphere Model (SCREAM)

Journal of Advances in Modeling Earth Systems
Accurately simulating clouds remains a key challenge in global climate models, primarily because cloud formation involves sub‐grid processes that are parameterized and crudely represented in models.
Li‐Wei Chao, Mark D. Zelinka, Christopher R. Terai, Hassan Beydoun, Benjamin R. Hillman, Noel D. Keen, Peter M. Caldwell, Stephen A. Klein   +7 more
doaj   +1 more source

Global System for Atmospheric Modeling: Model Description and Preliminary Results

Journal of Advances in Modeling Earth Systems, 2022
The extension of a cloud‐resolving model, the System for Atmospheric Modeling (SAM), to global domains is described. The resulting global model, gSAM, is formulated on a latitude‐longitude grid. It uses an anelastic dynamical core with a single reference
Marat F. Khairoutdinov, Peter N. Blossey, Christopher S. Bretherton   +2 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source