Atmospheric Conditions during the Deep Propagating Gravity Wave Experiment (DEEPWAVE)

Atmospheric Conditions during the Deep Propagating Gravity Wave Experiment (DEEPWAVE) AbstractThis paper describes results of a comprehensive analysis of the atmospheric conditions during the DEEPWAVE campaign in austral winter 2014. Different datasets and diagnostics are combined to characterize the background atmosphere from the troposphere to the upper mesosphere. We report on how weather regimes and the atmospheric state compare to climatological conditions and also explore how they relate to the airborne and ground-based gravity wave observations. Key results of this study are the dominance of tropospheric blocking situations and low-level southwesterly flows over New Zealand during June, July, and August 2014. A varying tropopause inversion layer was found to be connected to varying vertical energy fluxes and is, therefore, an important feature with respect to wave reflection. The subtropical jet was frequently diverted south from its climatological position at 30°S and was most often involved in strong forcing events of mountain waves at the Southern Alps. The polar front jet was typically responsible for moderate and weak tropospheric forcing of mountain waves. The stratospheric planetary wave activity amplified in July leading to a displacement of the Antarctic polar vortex. This reduced the stratospheric wind minimum by about 10 m s-1 above New Zealand making breaking of large amplitude gravity waves more likely. Satellite observations in the upper stratosphere revealed that orographic gravity wave variances for 2014 were largest in May, June and July, i.e. the period of the DEEPWAVE field phase. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Monthly Weather Review American Meteorological Society

Atmospheric Conditions during the Deep Propagating Gravity Wave Experiment (DEEPWAVE)

Loading next page...
 
/lp/ams/atmospheric-conditions-during-the-deep-propagating-gravity-wave-87VHVg27Yq
Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0493
D.O.I.
10.1175/MWR-D-16-0435.1
Publisher site
See Article on Publisher Site

Abstract

AbstractThis paper describes results of a comprehensive analysis of the atmospheric conditions during the DEEPWAVE campaign in austral winter 2014. Different datasets and diagnostics are combined to characterize the background atmosphere from the troposphere to the upper mesosphere. We report on how weather regimes and the atmospheric state compare to climatological conditions and also explore how they relate to the airborne and ground-based gravity wave observations. Key results of this study are the dominance of tropospheric blocking situations and low-level southwesterly flows over New Zealand during June, July, and August 2014. A varying tropopause inversion layer was found to be connected to varying vertical energy fluxes and is, therefore, an important feature with respect to wave reflection. The subtropical jet was frequently diverted south from its climatological position at 30°S and was most often involved in strong forcing events of mountain waves at the Southern Alps. The polar front jet was typically responsible for moderate and weak tropospheric forcing of mountain waves. The stratospheric planetary wave activity amplified in July leading to a displacement of the Antarctic polar vortex. This reduced the stratospheric wind minimum by about 10 m s-1 above New Zealand making breaking of large amplitude gravity waves more likely. Satellite observations in the upper stratosphere revealed that orographic gravity wave variances for 2014 were largest in May, June and July, i.e. the period of the DEEPWAVE field phase.

Journal

Monthly Weather ReviewAmerican Meteorological Society

Published: Jul 27, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off