Results 31 to 40 of about 298,312 (304)

Developing a Cloud Scheme With Prognostic Cloud Fraction and Two Moment Microphysics for ECHAM‐HAM

open access: yesJournal of Advances in Modeling Earth Systems, 2020
We present a new cloud scheme for the ECHAM‐HAM global climate model (GCM) that includes prognostic cloud fraction and allows for subsaturation and supersaturation with respect to ice separately in the cloud‐free and cloudy air. Stratiform clouds form by
Steffen Muench, Ulrike Lohmann
doaj   +1 more source

Is atomic carbon a good tracer of molecular gas in metal-poor galaxies? [PDF]

open access: yes, 2015
Carbon monoxide (CO) is widely used as a tracer of molecular hydrogen (H2) in metal-rich galaxies, but is known to become ineffective in low metallicity dwarf galaxies.
Clark, Paul C., Glover, Simon C. O.
core   +3 more sources

Estimating Layered Cloud Cover from Geostationary Satellite Radiometric Measurements: A Novel Method and Its Application

open access: yesRemote Sensing, 2022
Layered cloud cover (LCC), that is, cloud cover at different levels, is crucial for estimating cloud radiative effects and modeling climate change. However, accurate LCC characterization using passive satellite measurements is challenging because of the ...
Zhonghui Tan   +5 more
doaj   +1 more source

Star formation in the giant HII regions of M101 [PDF]

open access: yes, 1999
The molecular components of three giant HII regions (NGC 5461, NGC 5462, NGC 5471) in the galaxy M101 are investigated with new observations from the James Clerk Maxwell Telescope, the NRAO 12-meter, and the Owens Valley millimeter array.
Braun R.   +6 more
core   +2 more sources

On the link between Amazonian forest properties and shallow cumulus cloud fields [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
During the dry season the Amazon forest is frequently covered by shallow cumulus clouds fields, referred to here as forest cumulus (FCu). These clouds are shown to be sensitive to land cover and exhibit a high level of spatial organization. In this study
R. H. Heiblum, I. Koren, G. Feingold
doaj   +1 more source

Deep Learning Based Cloud Cover Parameterization for ICON [PDF]

open access: yesJournal of Advances in Modeling Earth Systems, 2021
AbstractA promising approach to improve cloud parameterizations within climate models and thus climate projections is to use deep learning in combination with training data from storm‐resolving model (SRM) simulations. The ICOsahedral Non‐hydrostatic (ICON) modeling framework permits simulations ranging from numerical weather prediction to climate ...
Grundner, Arthur   +10 more
openaire   +6 more sources

Important non-local effects of deforestation on cloud cover changes in CMIP6 models

open access: yesEnvironmental Research Letters, 2023
Recent satellite and in-situ measurements show that forests can influence regional and global cloud cover through biophysical processes. However, forest’s possible local and non-local impacts on clouds remain unclear.
Wenjian Hua   +4 more
doaj   +1 more source

Measuring the Size of Quasar Broad-Line Clouds Through Time Delay Light-Curve Anomalies of Gravitational Lenses

open access: yes, 2002
Intensive monitoring campaigns have recently attempted to measure the time delays between multiple images of gravitational lenses. Some of the resulting light-curves show puzzling low-level, rapid variability which is unique to individual images ...
Abraham Loeb   +9 more
core   +2 more sources

Distinct response of near surface air temperature to clouds in North China

open access: yesAtmospheric Science Letters, 2022
Using the daily 2 m maximum temperature (Tmax), 2 m minimum temperature (Tmin) and cloud cover data measured at ground sites of the China Meteorological Administration in North China from 2000 to 2017, this study investigates the influence of clouds on ...
Shuyi Jiang, Chuanfeng Zhao, Yan Xia
doaj   +1 more source

Secure communication using dynamic VPN provisioning in an Inter-Cloud environment [PDF]

open access: yes, 2012
Most of the current cloud computing platforms offer Infrastructure as a Service (IaaS) model, which aims to provision basic virtualised computing resources as on-demand and dynamic services.
Dimitrakos, T.   +4 more
core   +1 more source

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