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PBL Stratiform Cloud Inhomogeneities Thermally Induced by the Orography: A Parameterization for Climate Models
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ABSTRACT
This paper proposes a parameterization for use in climate models of the orographic variance and associated thermal circulation's impact on the macroscopic behavior of planetary boundary layer (PBL) stratiform clouds. Orographically induced inhomogeneities in the PBL cloud field can significantly alter the area-averaged cloud-radiative properties and consequently the PBL evolution. Current climate models do not include this effect.
The design of the parameterization is b...
Related newspaper, magazine, and journal articles from HighBeam Research
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PBL Stratiform Cloud Inhomogeneities Thermally Induced by the Orography: A Parameterization for Climate Models
Journal of the Atmospheric Sciences
; ABSTRACT This paper proposes a parameterization for use in climate models of the orographic variance and associated thermal circulation's impact on the macroscopic behavior of planetary boundary layer (PBL) stratiform clouds. Orographically induced inhomogeneities in the PBL cloud field can
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Assimilation of Satellite Cloud Data into the GMAO Finite-Volume Data Assimilation System Using a Parameter Estimation Method. Part I: Motivation and Algorithm Description
Journal of the Atmospheric Sciences
; ... 25 resolution) complete with data gaps between orbits. Two maps exist per file, one of ascending orbit segments and the other of descending orbit segments. Data on each of the segment maps are overwritten at both the high latitudes where successive ...
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A Cloud Fraction versus View Angle Technique for Automatic In-Scene Evaluation of the MISR Cloud Mask
Journal of Applied Meteorology
; ABSTRACT The Multiangle Imaging Spectroradiometer (MISR), on board the Earth Observing System (EOS) satellite Terra, is the first high-resolution imager to make global, near-simultaneous multispectral and multiangle radiometric measurements of the earth. A standard product of MISR is the
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Cloud coverage based on all-sky imaging and its impact on surface solar irradiance
Journal of Applied Meteorology
; ABSTRACT In Lauder, Central Otago, New Zealand, two all-sky imaging systems have been in operation for more than 1 yr, measuring the total, opaque, and thin cloud fraction, as well as indicating whether the sun is obscured by clouds. The data provide a basis for investigating the impact of clouds
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Cloud fraction and relative humidity in a prognostic cloud fraction scheme
Monthly Weather Review
; 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 diagnostic relation for cloud fraction can be derived for subtropical
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Parameterizing vertically coherent cloud distributions
Journal of the Atmospheric Sciences
; ABSTRACT A parameterization for specifying subgrid-scale cloud distributions in atmospheric models is developed. The fractional area of a grid-scale column in which clouds from two levels overlap (i.e., the cloud overlap probability) is described in terms of the correlation between horizontal
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CLOUDNET
Bulletin of the American Meteorological Society
; Continuous Evaluation of Cloud Profiles in Seven Operational Models Using Ground-Based Observations Cloud fraction, liquid and ice water contents derived from long-term radar, lidar, and microwave radiometer data are systematically compared to models to quantify and improve their performance. The
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Tests of Monte Carlo Independent Column Approximation in the ECHAM5 Atmospheric GCM
Journal of Climate
; ABSTRACT The Monte Carlo Independent Column Approximation (McICA) method for computing domain-average radiative fluxes allows a flexible treatment of unresolved cloud structure, and it is unbiased with respect to the full ICA, but its flux estimates contain conditional random noise. Here, tests of
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Comparison of ECMWF winter-season cloud fraction with radar-derived values
Journal of Applied Meteorology
; (Manuscript received 1 March 2000, in final form 31 July 2000) ABSTRACT Of great importance for the simulation of climate using general circulation models is their ability to represent accurately the vertical distribution of fractional cloud amount. In this paper, a technique to derive cloud
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What controls stratocumulus radiative properties? Lagrangian observations of cloud evolution
Journal of the Atmospheric Sciences
; ROBERT PINCUS* AND MARCIA B. BAKER Geophysics Program, University of Washington, Seattle, Washington CHRISTOPHER S. BRETERTON Department of Atmospheric Sciences, University of Washington, Seattle, Washington (Manuscript received 13 may 1996, in final form 6 march 1997) ABSTRACT Marine stratocumulus
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