Soil, Environmental and Atmospheric Sciences publications (MU): Recent submissions
Now showing items 21-38 of 38
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A comparison of two cases of low-latitude thundersnow
(Centro Ciencias Atmosfera UNAM, 2009-03)Two cases of low-latitude snow with lightning are studied to determine their characteristics. Both cases had synoptic-scale origins, but also featured smaller-scale influences (e. g. orographic lift and elevated instability).The ... -
A Diagnosis of the Explosive Development of Two Extratropical Cyclones
(American Meteorological Society, 1992-08)This paper examines the 24-h explosive development periods of two extratropical cyclones, the first occurring over the Gulf Stream off the coast of New England from 18 to 19 January 1979 and the second occurring over the ... -
A Diagnosis of the development of a Winter Anticyclone over North America
(American Meteorological Society, 1995-08)This paper examines the 48-h life cycle of a winter anticyclone occurring over North America from 18 to 20 January 1979 using Goddard Laboratory for Atmospheres FGGE level IIIb (SOP 1) global analyses on a 4° latitude by ... -
Planetary and synoptic-scale interactions during the life cycle of a mid-latitude blocking anticyclone over the North Atlantic
(Munksgaard, 1995-10)The formation of a blocking anticyclone over the North Atlantic has been examined over its entire life-cycle using the Zwack-Okossi (Z-O) equation as the diagnostic tool. This blocking anticyclone occurred in late October ... -
A Diagnosis of Two Blocking Events That Occurred Simultaneously in the Midlatitude Northern Hemisphere
(American Meteorological Society, 1997-08)Using the Goddard Laboratory for Atmospheres Goddard Earth Observing System-1 analyses, the horizontal distribution of atmospheric forcing processes involved in the growth, maintenance, and decay of two Northern Hemisphere ... -
The Interactions between a Midlatitude Blocking Anticyclone and Synoptic-Scale Cyclones That Occurred during the Summer Season
(American Meteorological Society, 1998-02)Using the Goddard Laboratory for Atmospheres Goddard Earth Observing System 5-yr analysis and the Zwack-Okossi equation as the diagnostic tool, the horizontal distribution of the dynamic and thermodynamic forcing processes ... -
An Analysis of a Relatively Rare Case of Continental Blocking
(Jon Wiley and Sons, 1999-01)A planetary and synoptic-scale analysis of a relatively rare continental blocking event that occurred over North America during the spring of 1980 are undertaken to determine whether or not this event was different from ... -
Otsenka Vliianiia Protsessov Planetarnogo Masshtaba S Analieom Faeovieikh Tr aektorii I Enstrofii Na Raspad Blokingov
(Pleiades Publishing, 2007-01)It was shown that abrupt changes in the large-scale structure of atmospheric flows may lead to the rapid decay of blocking. Analysis of phase diagrams made it possible to identify when sharp changes occurred in the dynamics ... -
The diagnosis of a pre-blocking explosively-developing extratropical cyclone system
(Munksgaard, 1992-05)This paper presents the diagnosis of an extratropical cyclone that developed explosively from 18 to 19 January 1979 over the North Atlantic Ocean. The diagnosis applies data obtained from the Goddard Laboratory for Atmospheres ... -
An analysis of a long-lived MCV observed over the Southern Plains using Potential Vorticity diagnostics.
(National Weather Association, 2000-09)On the morning of 28 May 1998, a mesoscale convectively-generated vortex (MCV) was observed over the Southern Plains. This MCV was evident in the GOES-8 visual satellite imagery resulting in a spectacular picture. An ... -
South American Cold Surges: Types, Composites, and Case Studies
(American Meteorological Society, 2001-05)This paper examines the climatological, large-scale, and synoptic-scale aspects of South American cold surges using NCEP-NCAR gridded reanalyses for the 1992-96 period. Three common cold surge types are identified on the ... -
The Application of a Simple Method for the Verification of Weather Forecasts and Seasonal Variations in Forecast Accuracy
(American Meteorological Society, 2002-08)The evaluation of weather forecast accuracy has always been a difficult subject to address for many reasons. In this study, a simple semiobjective method is used to examine the accuracy of zone forecasts issued by the ... -
The Planetary- and Synoptic-Scale Interactions in a Southeast Pacific Blocking Episode Using PV Diagnostics
(American Meteorological Society, 2005-06)The synoptic- and planetary-scale forcing in two blocking anticyclones occurring over the southeast Pacific Ocean was examined using potential vorticity diagnostics. While many studies have examined the dynamic and ... -
Ageostrophic Forcing in a Height Tendency Equation
(American Meteorological Society, 2002-01)The role of the ageostrophic vorticity tendencies in the Zwack-Okossi vorticity tendency equation has been examined within the context that this term in the equation acts as a correction term for the vorticity tendency or ... -
Assessment of the Impact of the Planetary Scale on the Decay of Blocking and the Use of Phase Diagrams and Enstrophy as a Diagnostic
(Pleiades Publishing, 2007-01)It was shown that abrupt changes in the large-scale structure of atmospheric flows may lead to the rapid decay of blocking. Analysis of phase diagrams made it possible to identify when sharp changes occurred in the dynamics ... -
Dynamics of Eddy-Driven Low-Frequency Dipole Modes. Part I: A Simple Model of North Atlantic Oscillations
(American Meteorological Society, 2007-01)A simple theoretical model is proposed to clarify how synoptic-scale waves drive the life cycle of the North Atlantic Oscillation (NAO) with a period of nearly two weeks. This model is able to elucidate what determines ... -
Calculated Height Tendencies in Two Southern Hemisphere Blocking and Cyclone Events: The Contribution of Diabatic Heating to Block Intensification
(American Meteorological Society, 2008-09)The Zwack-Okossi vorticity tendency equation was used to calculate 500-hPa height tendencies in two intensifying Southern Hemisphere blocking events. The National Centers for Environmental Prediction- National Center for ... -
Dynamics of Eddy-Driven Low-Frequency Dipole Modes. Part II: Free Mode Characteristics of NAO and Diagnostic Study
(American Meteorological Society, 2007-01)Through calculating the scatter diagrams of the streamfunction ( P or T) versus potential vorticity (PV)(qP or qT), where P and T are the planetary-scale streamfunction and total streamfunction, respectively, and using ...