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Now showing items 21-36 of 36
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 ...
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 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 ...
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 ...
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 ...
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 ...
The Columbia, Missouri, Heat Island Experiment (COHIX) and the Influence of a Small City on the Local Climatology
(Missouri Academy of Science, 2004-05)
The heat island effect is a well known feature in the microclimate of urban areas but only a few studies have addressed the effect for smaller urban areas. We examine here the impact of Columbia, Missouri and the University ...
Determining the Spring to Summer Transition in the Missouri Ozarks Using Synoptic Scale Atmospheric Data
(Missouri Academy of Science, 2002-12)
There is abundant anecdotal evidence available to suggest that the transition from a spring to summer season flow regime is often quite abrupt. This same transition renders longrange forecasting problematic as the forecast ...
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 ...
The Interannual variability of hurricane activity in the Atlantic and east pacific regions
(National Weather Association, 2008-07)
The investigation of the interannual and interdecadal variations in hurricane activity has been an important topic of study lately, especially with regard to their implications for climate change issues. On the interannual ...
Interannual variability of tropical cyclone activity in the southern South China Sea
(American Geophysical Union, 2008-03)
A study of tropical storm activity in the southern South China Sea region was carried
out for the period of 1960 to 2006 using data obtained from the UNISYS website archive, which was provided to them from the Joint Typhoon ...
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 ...
The Wintertime Southern Hemisphere Split Jet: Structure, Variability, and Evolution
(American Meteorological Society, 2001-11)
A persistent feature of the Southern Hemisphere upper-level time-mean flow is the presence of a split jet across the South Pacific east of Australia during the austral winter. The split jet is composed of the subtropical ...
Climatological features of blocking anticyclones: a study of Northern Hemisphere CCM1 model blocking events in present-day and double CO2 concentration atmospheres
(Springer-Verlag, 1997)
Using output made with the National Center
for Atmospheric Research (NCAR) Community Climate Model Version 1 (CCM1), the characteristics of blocking events over the Northern Hemisphere in a ten-year present
day control ...