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RISCloud Fraction and Relative Humidity in a Prognostic Cloud Fraction Scheme
Publisher: American Meteorological Society
Abstract: The relationship between relative humidity and low cloud cover produced by a prognostic cloud fraction formulation is compared with observations. From a steady-state version of the prognostic cloud fraction equation, a ...
Probability Density Functions of Liquid Water Path and Cloud Amount of Marine Boundary Layer Clouds: Geographical and Seasonal Variations and Controlling Meteorological Factors
Publisher: American Meteorological Society
Abstract: The subgrid-scale variability of the liquid water path (LWP) of marine boundary layer clouds in areas that correspond to the typical grid size of large-scale (global climate and weather prediction) atmospheric models (200 ...
Probability Density Functions of Liquid Water Path and Total Water Content of Marine Boundary Layer Clouds: Implications for Cloud Parameterization
Publisher: American Meteorological Society
Abstract: athematical forms of probability density functions (PDFs) of liquid water path (LWP) and total water content for marine boundary layer clouds are investigated using the homogeneity, skewness, and kurtosis of PDFs of LWP ...
A Simple Model of the Northeast Pacific Stratocumulus to Cumulus Transition Based on the Climatological Surface Energy Budget
Publisher: American Meteorological Society
Abstract: ir advected equatorward by the trade winds off the coast of California is associated with decreasing cloud cover and is subjected to increasingly warmer sea surface temperatures. These gradients imply large gradients in ...
Sensitivity to Physical and Numerical Aspects of Large-Eddy Simulation of Stratocumulus
Publisher: American Meteorological Society
Abstract: AbstractA series of numerical experiments where both physical and numerical model parameters are varied with respect to a reference setup is used to investigate the physics of a stratocumulus cloud and the performance of ...
A Global Climatology of Temperature and Water Vapor Variance Scaling from the Atmospheric Infrared Sounder
Publisher: American Meteorological Society
Abstract: A global climatology of height-resolved variance scaling within the troposphere is presented using derived temperature (T) and water vapor (q) profiles from the Atmospheric Infrared Sounder (AIRS). The power-law exponent ...
A Planetary Boundary Layer Height Climatology Derived from ECMWF Reanalysis Data
Publisher: American Meteorological Society
Abstract: planetary boundary layer (PBL) height climatology from ECMWF reanalysis data is generated and analyzed. Different methods are first compared to derive PBL heights from atmospheric temperature, pressure, and relative humidity ...
Stochastic Nature of Physical Parameterizations in Ensemble Prediction: A Stochastic Convection Approach
Publisher: American Meteorological Society
Abstract: In this paper it is argued that ensemble prediction systems can be devised in such a way that physical parameterizations of subgrid-scale motions are utilized in a stochastic manner, rather than in a deterministic way as ...
Boundary Layer Clouds in a Global Atmospheric Model: Simple Cloud Cover Parameterizations
Publisher: American Meteorological Society
Abstract: Subtropical boundary layer clouds have a fundamental role on the radiative budget of the atmosphere and on the modulation of the tropical circulations. The development of realistic parameterizations of these clouds in ...
Scaling Behavior of a Turbulent Kinetic Energy Closure Scheme for the Stably Stratified Atmosphere: A Steady-State Analysis
Publisher: American Meteorological Society
Abstract: We present a turbulent kinetic energy (TKE) closure scheme for the stably stratified atmosphere in which the mixing lengths for momentum and heat are not parameterized in the same manner. The key difference is that, while ...