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RISClouds at Arctic Atmospheric Observatories. Part II: Thermodynamic Phase Characteristics
Publisher: American Meteorological Society
Abstract: Cloud phase defines many cloud properties and determines the ways in which clouds interact with other aspects of the climate system. The occurrence fraction and characteristics of clouds distinguished by their phase are ...
On the Relationship between Thermodynamic Structure and Cloud Top, and Its Climate Significance in the Arctic
Publisher: American Meteorological Society
Abstract: loud and thermodynamic characteristics from three Arctic observation sites are investigated to understand the collocation between low-level clouds and temperature inversions. A regime where cloud top was 100?200 m above ...
How Well Do Regional Climate Models Reproduce Radiation and Clouds in the Arctic? An Evaluation of ARCMIP Simulations
Publisher: American Meteorological Society
Abstract: Downwelling radiation in six regional models from the Arctic Regional Climate Model Intercomparison (ARCMIP) project is systematically biased negative in comparison with observations from the Surface Heat Budget of the ...
Cloud Radiative Forcing of the Arctic Surface: The Influence of Cloud Properties, Surface Albedo, and Solar Zenith Angle
Publisher: American Meteorological Society
Abstract: An annual cycle of cloud and radiation measurements made as part of the Surface Heat Budget of the Arctic (SHEBA) program are utilized to determine which properties of Arctic clouds control the surface radiation balance. ...
Characteristics and Radiative Effects of Diamond Dust over the Western Arctic Ocean Region
Publisher: American Meteorological Society
Abstract: Atmospheric observations from active remote sensors and surface observers, obtained in the western Arctic Ocean between November 1997 and May 1998, were analyzed to determine the physical characteristics and to assess the ...
Cloud–Atmospheric Boundary Layer–Surface Interactions on the Greenland Ice Sheet during the July 2012 Extreme Melt Event
Publisher: American Meteorological Society
Abstract: AbstractRegional model simulations of the 10?13 July 2012 extreme melt event over the Greenland Ice Sheet (GIS) are used to investigate how low-level liquid-bearing clouds impact surface energy fluxes, and therefore the ...
Arctic Cloud Microphysics Retrievals from Surface-Based Remote Sensors at SHEBA
Publisher: American Meteorological Society
Abstract: An operational suite of ground-based, remote sensing retrievals for producing cloud microphysical properties is described, assessed, and applied to 1 yr of observations in the Arctic. All measurements were made in support ...
Arctic Mixed-Phase Stratiform Cloud Properties from Multiple Years of Surface-Based Measurements at Two High-Latitude Locations
Publisher: American Meteorological Society
Abstract: Macro- and microphysical properties of single-layer stratiform mixed-phase clouds are derived from multiple years of lidar, radar, and radiosonde observations. Measurements were made as part of the Mixed-Phase Arctic Clouds ...
On Deriving Vertical Air Motions from Cloud Radar Doppler Spectra
Publisher: American Meteorological Society
Abstract: A method for deriving vertical air motions from cloud radar Doppler spectrum measurements is introduced. The method is applicable to cloud volumes containing small particles, in this case liquid droplets, which are assumed ...
Snowfall Retrievals Using Millimeter-Wavelength Cloud Radars
Publisher: American Meteorological Society
Abstract: It is demonstrated that millimeter-wavelength radars that are designed primarily for cloud studies can be also used effectively for snowfall retrievals. Radar reflectivity?liquid equivalent snowfall rate (Ze?S) relations ...