Search
CSV
RISGeneralization of Albrecht's Cumulus Cloud Amount Parameterization
Publisher: American Meteorological Society
Abstract: A diagnostic parameterization of cumulus cloud amount based on the decay of passive cloud material is reinvestigated. It is shown that assumptions previously made in the derivation may be relaxed by taking into account the ...
Katabatic Flow Mechanisms on a Low-Angle Slope
Publisher: American Meteorological Society
Abstract: Momentum and heat budget equations for katabatic flows on sloping surfaces are revisited. Terms in these equations are evaluated using wind and potential temperature data from four tethered-balloon data collection systems ...
Discrete Postprocessing of Total Cloud Cover Ensemble Forecasts
Publisher: American Meteorological Society
Abstract: his paper presents an approach to postprocess ensemble forecasts for the discrete and bounded weather variable of total cloud cover. Two methods for discrete statistical postprocessing of ensemble predictions are tested: ...
Improving Predictions of Precipitation Type at the Surface: Description and Verification of Two New Products from the ECMWF Ensemble
Publisher: American Meteorological Society
Abstract: AbstractThe medium-range ensemble (ENS) from the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS) is used to create two new products intended to face the challenges of winter ...
Effect of Dewfall and Frostfall on Nighttime Cooling in a Small, Closed Basin
Publisher: American Meteorological Society
Abstract: Series of tethered balloon soundings of temperature and humidity in Austria?s Gruenloch basin (floor elevation 1270 m MSL) on two June days showed that the water vapor mixing ratio fell by 2?3 g kg?1 overnight as dew or ...
A Mass Flux Model of Nocturnal Cold-Air Intrusions into a Closed Basin
Publisher: American Meteorological Society
Abstract: bservations made during the Meteor Crater Experiment (METCRAX) field campaign revealed unexpected nighttime cooling characteristics in Arizona?s Meteor Crater. Unlike in other natural closed basins, a near-isothermal ...
Advances in Predicting Continental Low Stratus with a Regional NWP Model
Publisher: American Meteorological Society
Abstract: In the eastern Alpine region, subinversion cloudiness associated with elevated temperature inversions is a frequent phenomenon in autumn and winter, which often persists for several days. Although the prediction of fog and ...
An NWP Model Intercomparison of Surface Weather Parameters in the European Arctic during the Year of Polar Prediction Special Observing Period Northern Hemisphere 1
Publisher: American Meteorological Society
Abstract: AbstractIncreased human activity in the Arctic calls for accurate and reliable weather predictions. This study presents an intercomparison of operational and/or high-resolution models in an attempt to establish a baseline ...
Verification of Solid Precipitation Forecasts from Numerical Weather Prediction Models in Norway
Publisher: American Meteorological Society
Abstract: Assessing the quality of precipitation forecasts requires observations, but all precipitation observations have associated uncertainties making it difficult to quantify the true forecast quality. One of the largest ...
Nocturnal Cold-Air Intrusions into a Closed Basin: Observational Evidence and Conceptual Model
Publisher: American Meteorological Society
Abstract: Observations are analyzed to explain an unusual feature of the nighttime atmospheric structure inside Arizona?s idealized, basin-shaped Meteor Crater. The upper 75%?80% of the crater?s atmosphere, which overlies an intense ...