Journal of the Atmospheric Sciences: Recent submissions
Now showing items 3441-3460 of 13215
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Wave Reflection and Focusing prior to the Major Stratospheric Warming of September 2002
(American Meteorological Society, 2005)Observations of the Southern Hemispheric winter conditions indicate that the major warming of September 2002 resulted from a combination of stationary wave-1 and traveling wave-2 forcing events and suggest that wave and ... -
Ozone Chemistry during the 2002 Antarctic Vortex Split
(American Meteorological Society, 2005)In September 2002, the Antarctic polar vortex was disturbed, and it split into two parts caused by an unusually early stratospheric major warming. This study discusses the chemical consequences of this event using the ... -
Has the Antarctic Vortex Split before 2002?
(American Meteorological Society, 2005)In late September 2002, the Antarctic ozone hole was seen to split into two parts, resulting in large increases in ozone at some stations and the potential for significant modification of chlorofluorocarbon (CFC)-induced ... -
Mixing and Chemical Ozone Loss during and after the Antarctic Polar Vortex Major Warming in September 2002
(American Meteorological Society, 2005)The 3D version of the Chemical Lagrangian Model of the Stratosphere (CLAMS) is used to study the transport of CH4 and O3 in the Antarctic stratosphere between 1 September and 30 November 2002, that is, over the time period ... -
Stratosphere–Troposphere Coupling in the Southern Hemisphere
(American Meteorological Society, 2005)This study examines the temporal evolution of the tropospheric circulation following large-amplitude variations in the strength of the Southern Hemisphere (SH) stratospheric polar vortex in data from 1979 to 2001 and ... -
GOME Observations of Stratospheric Trace Gas Distributions during the Splitting Vortex Event in the Antarctic Winter of 2002. Part I: Measurements
(American Meteorological Society, 2005)Measurements from the Global Ozone Monitoring Experiment (GOME) are used to study the chemical evolution of the stratosphere during the unusual 2002 winter in the Southern Hemisphere. The results show that chlorine activation ... -
Model Simulations of the Impact of the 2002 Antarctic Ozone Hole on the Midlatitudes
(American Meteorological Society, 2005)The 2002 Antarctic winter was characterized by unusually strong wave activity. The frequency and intensity of the anomalies increased in August and early September with a series of minor stratospheric warmings and culminated ... -
ECMWF Analyses and Forecasts of Stratospheric Winter Polar Vortex Breakup: September 2002 in the Southern Hemisphere and Related Events
(American Meteorological Society, 2005)Breakup of the polar stratospheric vortex in the Northern Hemisphere is an event that is known to be predictable for up to a week or so ahead. This is illustrated using data from the 45-yr ECMWF Re-Analysis (ERA-40) for ... -
The Unusual Southern Hemisphere Stratosphere Winter of 2002
(American Meteorological Society, 2005)he Southern Hemisphere (SH) stratospheric winter of 2002 was the most unusual winter yet observed in the SH climate record. Temperatures near the edge of the Antarctic polar vortex were considerably warmer than normal over ... -
Vertical Structure of the Anomalous 2002 Antarctic Ozone Hole
(American Meteorological Society, 2005)Ozone estimates from observations by the NOAA-16 Solar Backscattered Ultraviolet (SBUV/2) instrument and Television Infrared Observation Satellite (TIROS-N) Operational Vertical Sounder (TOVS) are used to describe the ... -
The Unusual Midwinter Warming in the Southern Hemisphere Stratosphere 2002: A Comparison to Northern Hemisphere Phenomena
(American Meteorological Society, 2005)A strong midwinter warming occurred in the Southern Hemisphere (SH) stratosphere in September 2002. Based on experiences from the Northern Hemisphere (NH), this event can be defined as a major warming with a breakdown of ... -
The Splitting of the Stratospheric Polar Vortex in the Southern Hemisphere, September 2002: Dynamical Evolution
(American Meteorological Society, 2005)The polar vortex of the Southern Hemisphere (SH) split dramatically during September 2002. The large-scale dynamical effects were manifest throughout the stratosphere and upper troposphere, corresponding to two distinct ... -
Ground-Based DOAS Measurements of Stratospheric Trace Gases at Two Antarctic Stations during the 2002 Ozone Hole Period
(American Meteorological Society, 2005)Compared to recent years, the development of the Antarctic ozone hole in 2002 showed very unusual dynamical features. The midwinter polar vortex was one of the smallest observed during the past decade. Driven by planetary ... -
Antarctic Ozone Transport and Depletion in Austral Spring 2002
(American Meteorological Society, 2005)The ozone budget in the Antarctic region during the stratospheric warming in 2002 is studied, using ozone analyses from the Royal Netherlands Meteorological Institute (KNMI) ozone-transport and assimilation model called ... -
Evidence against an Antarctic Stratospheric Vortex Split during the Periods of Pre-IGY Temperature Measurements
(American Meteorological Society, 2005)Historic upper-air observations from Antarctica are inspected to investigate the uniqueness of the vortex split in the Antarctic spring of 2002. No comprehensive meteorological observations are available prior to the ... -
An Observational Study of the Final Breakdown of the Southern Hemisphere Stratospheric Vortex in 2002
(American Meteorological Society, 2005)The 2002 Southern Hemisphere final warming occurred early, following an unusually active winter and the first recorded major warming in the Antarctic. The breakdown of the stratospheric polar vortex in October and November ... -
Simulations of Dynamics and Transport during the September 2002 Antarctic Major Warming
(American Meteorological Society, 2005)A mechanistic model simulation initialized on 14 September 2002, forced by 100-hPa geopotential heights from Met Office analyses, reproduced the dynamical features of the 2002 Antarctic major warming. The vortex split on ... -
A Very Large, Spontaneous Stratospheric Sudden Warming in a Simple AGCM: A Prototype for the Southern Hemisphere Warming of 2002?
(American Meteorological Society, 2005)An exceptionally strong stratospheric sudden warming (SSW) that spontaneously occurs in a very simple stratosphere?troposphere AGCM is discussed. The model is a dry, hydrostatic, primitive equation model without planetary ... -
Assessing a Cloud Optical Depth Retrieval Algorithm with Model-Generated Data and the Frozen Turbulence Assumption
(American Meteorological Society, 2004)A cloud optical depth retrieval algorithm that utilizes time series of solar irradiance and zenith downwelling radiance data collected at a fixed surface site is assessed using model-generated cloud fields and simulated ... -
Horizontally Oriented Plates in Clouds
(American Meteorological Society, 2004)Horizontally oriented plates in clouds generate a sharp specular reflectance signal in the glint direction, often referred to as ?subsun.? This signal (amplitude and width) may be used to analyze the relative area fraction ...