contributor author | Turpeinen, Olli M. | |
contributor author | Garand, Louis | |
contributor author | Benoit, Robert | |
contributor author | Roch, Michel | |
date accessioned | 2017-06-09T16:07:53Z | |
date available | 2017-06-09T16:07:53Z | |
date copyright | 1990/07/01 | |
date issued | 1990 | |
identifier issn | 0027-0644 | |
identifier other | ams-61625.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4202427 | |
description abstract | The usefulness of numerical weather prediction models in very short-range forecasting is limited by the spinup problem, resulting in an underestimation of both the divergent wind component and the precipitation. To alleviate the spinup problem, latent-heating profiles were directly assimilated into the Canadian regional finite-element (RFE) model. The estimates of latent heating were based on the precipitation rates inferred from GOES infrared and visible imagery. The latent heating was distributed in the vertical according to the stratiform condensation scheme of the model, but the heating rates were normalized to correspond to the satellite-inferred rain rates. The initial relative humidity field was enhanced to 95% between sigma-level 0.875 and the cloud top wherever the probability of precipitation, derived from satellite imagery, was larger than 40%. The results of a case study from the Canadian Atlantic Storms Program (CASP) indicated that the spinup time of the vertical motion, initially of the order of 9 hours, could be practically eliminated. The forecast precipitation rates in the frontal zone agreed closely with Nimbus-7 SMMR microwave observations as early as 1?2 hours after the initialization. | |
publisher | American Meteorological Society | |
title | Diabatic initialization of the Canadian Regional Finite-Element (RFE) Model Using Satellite Data. Part I: Methodology and Application to a Winter Storm | |
type | Journal Paper | |
journal volume | 118 | |
journal issue | 7 | |
journal title | Monthly Weather Review | |
identifier doi | 10.1175/1520-0493(1990)118<1381:DIOTCR>2.0.CO;2 | |
journal fristpage | 1381 | |
journal lastpage | 1395 | |
tree | Monthly Weather Review:;1990:;volume( 118 ):;issue: 007 | |
contenttype | Fulltext | |