Search Results

You are looking at 101 - 110 of 2,075 items for :

  • Mesoscale forecasting x
  • Journal of the Atmospheric Sciences x
  • User-accessible content x
Clear All
Rebecca M. Cintineo and David J. Stensrud

include the growth in error to where the forecast no longer provides predictive utility to forecasters. The same is true for the storm scale, and the present study seeks to provide a more practical approach to predictability based upon specific storm features. This approach is similar to that of previous studies that investigated the predictability of mesoscale convective systems (MCSs) ( Stensrud and Wicker 2004 ; Wandishin et al. 2008 , 2010 ). The predictability investigated here is meant to

Full access
Xingqin Fang and Ying-Hwa Kuo

circulation models (e.g., Koshyk and Hamilton 2001 ; Hamilton et al. 2008 ; Augier and Lindborg 2013 ) and regional mesoscale numerical weather prediction models (e.g., Skamarock 2004 ; Ricard et al. 2013 ), other global models, such as the ECMWF’s weather prediction model Integrated Forecast System (IFS), produce mesoscale spectrum significantly steeper than that analyzed from the observations, even at relatively high resolution (e.g., Shutts 2005 ; Burgess et al. 2013 ; Augier and Lindborg 2013

Full access
Tiffany A. Shaw and Theodore G. Shepherd

sign; that is, [ECHAM3 atmospheric GCM (see http://www.mpimet.mpg.de/fileadmin/models/echam/echam3_DKRZ-ReportNo.6.pdf ); Boville and Bretherton 2003 ; the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecast System (see http://www.ecmwf.int/research/ifsdocs/CY28r1/Physics/index.html , section 3.6)], where the tendencies in (1) are understood to be those arising from subgrid-scale parameterizations. This assumption of local conservation is evidently not appropriate

Full access
Wansuo Duan and Zhenhua Huo

baroclinic unstable modes in the baroclinically unstable regions in realistic numerical weather forecast models, which indicates the usefulness of the initial perturbations of particular structures in ensemble forecasts. Therefore, to demonstrate the superiority of CNOPs in ensemble forecasting compared to RPs, realistic weather models, such as the Fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5; Dudhia 1993 ) or Weather Research and

Full access
Michael L. Waite and Chris Snyder

. Davis , and M. Weisman , 2004 : The next generation of NWP: Explicit forecasts of convection using the Weather Research and Forecasting (WRF) model . Atmos. Sci. Lett. , 5 , 110 – 117 . Gage , K. S. , 1979 : Evidence for a k −5/3 law inertial range in mesoscale two-dimensional turbulence . J. Atmos. Sci. , 36 , 1950 – 1954 . Gkioulekas , E. , and K. K. Tung , 2005a : On the double cascades of energy and enstrophy in two dimensional turbulence. Part 1. Theoretical formulation

Full access
Antti Arola

-Range Weather Forecasts model is at about 30 m. Therefore the reference level used to calculate the fluxes in all of the surface flux parameterizations, which were considered in our study, was about 26 m, which is the third lowest sigma level of the mesoscale model. The first method to be applied to extend the basic mosaic method, is modified from an approach proposed by Vihma (1995) . It uses stability-corrected logarithmic profiles to calculate local wind speed, air temperature, and specific humidity

Full access
Jun-Ichi Yano, Mitchell W. Moncrieff, and Xiaoqing Wu

1. Introduction Precipitating convection is known to be organized into various kinds of cloud systems on scales ranging from a few kilometers to more than a thousand kilometers, which is the entire range of mesoscale motion. Their ubiquity and structural diversity are amply illustrated in visible and infrared satellite images. One prominent kind of organization is the mesoscale convective system, also known as a tropical cloud cluster, which is an ensemble of cumulonimbus consisting of two

Full access
Rupa Kamineni, T. N. Krishnamurti, S. Pattnaik, Edward V. Browell, Syed Ismail, and Richard A. Ferrare

measurements during CAMEX, but in the future, this capability could be on several aircraft and eventually in space. In the meantime, global humidity profiling will be provided by the Aqua satellite; this points to a natural extension of the present work to examine the impact of moisture profiling datasets on global weather forecasts. A major thrust on mesoscale high-resolution modeling of hurricanes has emerged in recent years; see, for example, Kurihara et al. (1995 , 1998 ), Cocke (1998) , Zhang

Full access
Michael L. Waite and Chris Snyder

use in ensemble prediction systems. Quart. J. Roy. Meteor. Soc. , 131 , 3079 – 3102 . Skamarock , W. C. , 2004 : Evaluating mesoscale NWP models using kinetic energy spectra. Mon. Wea. Rev. , 132 , 3019 – 3032 . Skamarock , W. C. , and J. B. Klemp , 2008 : A time-split nonhydrostatic atmospheric model for weather research and forecasting applications. J. Comput. Phys. , 227 , 3465 – 3485 . Skamarock , W. C. , J. B. Klemp , J. Dudhia , D. O. Gill , D. M. Barker

Full access
Zhe-Min Tan, Fuqing Zhang, Richard Rotunno, and Chris Snyder

-generation Pennsylvania State University (PSU)–National Center for Atmospheric Research (NCAR) Mesoscale Model (MM5; Dudhia 1993 ), ZSR02 investigated the 0–36-h forecast for the same case; MM5 forecasts initialized from several different operational initial analyses showed, consistent with Langland et al. (2002) , similarly good skill from a large-scale perspective, but rather large differences among the forecasts in their mesoscale precipitation patterns. By comparing simulations of the same case in which the

Full access