contributor author | Manning, Kevin W. | |
contributor author | Davis, Christopher A. | |
date accessioned | 2017-06-09T14:53:51Z | |
date available | 2017-06-09T14:53:51Z | |
date copyright | 1997/12/01 | |
date issued | 1997 | |
identifier issn | 0882-8156 | |
identifier other | ams-2919.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4166389 | |
description abstract | A statistical verification of real-time forecasts from the Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model version 5 (MM5) examines several model biases noted in numerical forecasts prepared for the Winter Icing and Storms Project?s 1994 field experiment. Verification of MM5 forecasts against satellite and radiosonde data reveals a strong cloudy bias in the mid- to upper troposphere, significant moist biases aloft and near the surface, and a deep cold bias through much of the troposphere. The cloudy bias and upper-level moist bias are traced to an inappropriate assumption in the microphysical parameterization. Simple changes to the parameterization greatly improve the cloud forecast. A portion of the deep cold bias is attributed to the simple parameterization of atmospheric radiation used for the forecasts. The low-level cold and moist biases are in large part due to the climatological values of soil moisture availability as a function of land-use category. Experiments with a one-dimensional column model further quantify the sensitivity of low-level temperatures to the soil moisture availability values. While an immediate improvement in model results can be achieved by selection of more appropriate values of moisture availability, ultimately a detailed initialization and parameterization of soil moisture is needed. | |
publisher | American Meteorological Society | |
title | Verification and Sensitivity Experiments for the WISP94 MM5 Forecasts | |
type | Journal Paper | |
journal volume | 12 | |
journal issue | 4 | |
journal title | Weather and Forecasting | |
identifier doi | 10.1175/1520-0434(1997)012<0719:VASEFT>2.0.CO;2 | |
journal fristpage | 719 | |
journal lastpage | 735 | |
tree | Weather and Forecasting:;1997:;volume( 012 ):;issue: 004 | |
contenttype | Fulltext | |