A Stratosphere-Troposphere Data Assimilation System

Swinbank, Richard; O’Neill, A.

doi:10.1175/1520-0493(1994)122<0686:astdas>2.0.co;2

Cited by 594 publications

(391 citation statements)

References 0 publications

Supporting

Mentioning

385

Contrasting

Order By: Relevance

“…The data are output once per day at 12 Z on the UARS (Upper Atmosphere Research Satellite) pressure grid (from 1000 hPa to 0.316 hPa). Further details are given by Swinbank and O'Neill [ 1994]. Estimates of the precision of UKMO height and wind fields are given in the UKMO data quality document that is distributed with the data.…”

Section: Methodsmentioning

confidence: 99%

Stationary anomalies in stratospheric meteorological data sets

Bowman¹,

Hoppel²,

Swinbank³

1998

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

Abstract. Several northern hemisphere stratospheric meteorological data sets are shown to contain stationary anomalies. We consider four possible explanations for the anomalies: 1) real stationary-wave features; 2) biases in the analysis and assimilation methods; 3) errors in data input into the analysis and assimilation systems; and 4) tidal signals that are undersampled in the daily analyses. Because the easterly flow in the summer stratosphere is not consistent with stationary waves and the anomalies are present in multiple analyses, we conclude that the anomalies are a combination of biases in the input data and tidal signals that are aliased to zero frequency by daily sampling. Because the anomalies are large, they can have significant impacts on many applications of the data, including trajectories and chemical transport calculations.

show abstract

Section: Methodsmentioning

confidence: 99%

Stationary anomalies in stratospheric meteorological data sets

Bowman¹,

Hoppel²,

Swinbank³

1998

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…A quasi-stationary wavenumber 1 planetary wave pattern in zonal temperature appeared around 17 July and intensified over the following two weeks. As shown in Figure 4(a) for the 2.2 hPa pressure level in the United Kingdom Meteorological Office (UKMO) stratospheric assimilation (Swinbank and O'Neill 1994), the cold pool that normally resides over the pole was displaced towards South America. In the lower stratosphere, the corresponding UKMO temperature field was more zonally symmetric (Fig.…”

Section: Dynamical Activity In Julymentioning

confidence: 99%

The Antarctic ozone hole during 2010

Klekociuk¹,

Tully²,

Alexander³

et al. 2011

AMOJ

View full text Add to dashboard Cite

“…Trajectories are calculated using United Kingdom Meteorological Office (UKMO) data [Swinbank and O'Neill, 1994].…”

Section: Datamentioning

confidence: 99%

On the size of the Antarctic ozone hole

Newman

Kawa

Nash

2004

Geophysical Research Letters

104

114

View full text Add to dashboard Cite

[1] A primary estimate of the severity of the Antarctic ozone hole is its size. The size is calculated from the area contained by total column ozone values less than 220 Dobson Units (DU) during September -October. The 220-DU value is used because it is lower than pre-1980 observed ozone values, and because it is in the strong ozone gradient region. We quantitatively show that the ozone hole size is primarily sensitive to effective stratospheric chlorine trends, and secondarily to the year-to-year variations in temperatures near the edge of the polar vortex. Temperatures are in turn sensitive to variations in tropospheric planetary wave forcing of the Southern Hemisphere stratosphere. Currently the average hole size reaches approximately 25 million km 2 each spring. Slow decreases of ozone depleting substances will only result in a decrease of about 1 million km 2 by 2015. This slow size decrease will be obscured by large dynamically forced year-to-year variations of 4 million km 2 (1s), and possibly delayed by greenhouse gas cooling of the Antarctic stratosphere.

show abstract

A Stratosphere-Troposphere Data Assimilation System

Cited by 594 publications

References 0 publications

Stationary anomalies in stratospheric meteorological data sets

Stationary anomalies in stratospheric meteorological data sets

The Antarctic ozone hole during 2010

On the size of the Antarctic ozone hole

Contact Info

Product

Resources

About