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RISSensitivity of a Global Climate Model to the Specification of Convective Updraft and Downdraft Mass Fluxes
Publisher: American Meteorological Society
Abstract: We examine the response of the GISS global climate model to different parameterizations of moist convective man flux. A control run with arbitrarily specified updraft mass flux is compared to experiments that predict cumulus ...
Planetary-Scale Waves and the Cyclic Nature of Cloud Top Dynamics on Venus
Publisher: American Meteorological Society
Abstract: Pioneer Venus OCPP ultraviolet images spanning eight years have been analyzed objectively to derive quantitative information on the properties of planetary-scale wave modes at the Venus cloud tops. We infer propagation ...
A Comparative Study of Rapidly and Slowly Rotating Dynamical Regimes in a Terrestrial General Circulation Model
Publisher: American Meteorological Society
Abstract: As a preliminary step in the development of a general circulation model for general planetary use, a simplified version of the GISS Model 1 GCM has been run at various rotation periods to investigate differences between ...
The Role of Entrainment in the Diurnal Cycle of Continental Convection
Publisher: American Meteorological Society
Abstract: In continental convective environments, general circulation models typically produce a diurnal cycle of rainfall that peaks close to the noon maximum of insolation, hours earlier than the observed peak. One possible reason ...
Radiative and Microphysical Characteristics of Deep Convective Systems in the Tropical Western Pacific
Publisher: American Meteorological Society
Abstract: The radiative and microphysical characteristics of 17 precipitating systems observed by the Tropical Rainfall Measuring Mission (TRMM) satellite over Manus, Papua New Guinea, and Nauru Island are modeled. These cases ...
Climatic Properties of Tropical Precipitating Convection under Varying Environmental Conditions
Publisher: American Meteorological Society
Abstract: A clustering algorithm is used to define the radiative, hydrological, and microphysical properties of precipitating convective events in the equatorial region observed by the Tropical Rainfall Measuring Mission (TRMM) ...
The Temperature Dependence of the Liquid Water Path of Low Clouds in the Southern Great Plains
Publisher: American Meteorological Society
Abstract: Satellite observations of low-level clouds have challenged the idea that increasing liquid water content with temperature combined with constant physical thickness will lead to a negative cloud optics feedback in a decadal ...
Effects of Cloud Parameterization on the Simulation of Climate Changes in the GISS GCM
Publisher: American Meteorological Society
Abstract: Climate changes obtained from five doubled CO2 experiments with different parameterizations of large-scale clouds and moist convection are studied by use of the Goddard Institute for Space Studies (GISS) GCM at 4° lat ? ...
Effects of Cloud Parameterization on the Simulation of Climate Changes in the GISS GCM. Part II: Sea Surface Temperature and Cloud Feedbacks
Publisher: American Meteorological Society
Abstract: The influence of the sea surface temperature distribution on cloud feedbacks is studied by making two sets of doubled CO2 experiments with the Goddard Institute for Space Studies (GISS) GCM at 4° latitude ? 5° longitude ...
Composite Analysis of Winter Cyclones in a GCM: Influence on Climatological Humidity
Publisher: American Meteorological Society
Abstract: The role of midlatitude baroclinic cyclones in maintaining the extratropical winter distribution of water vapor in an operational global climate model is investigated. A cyclone identification and tracking algorithm is ...