Dynamics and ionisation in the Antarctic middle atmosphere: MF radar measurements
Entry ID: K055_2004_2012_NZ_1

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Summary
Abstract: Our studies investigate the Antarctic middle atmosphere’s response to natural and man-made factors which change climate. The dynamical processes of this region are significant in controlling the circulation at lower altitudes, including the stratospheric ozone layer. The feedbacks in the atmosphere, couple this change to climate change at the surface. The seasonal behaviour of this wave-driven circulation, particularly it's dependence on major disturbances in the stratosphere which result in the transport of energy and momentum by waves to a higher altitudes are examined. The programme is based on continuous monitoring of winds in the middle atmosphere at altitudes of 60-100km using a ground-based medium frequency radar located at Scott Base. The Scott Base radar has been recording wind measurements since 1982 and is one of the longest duration climate records of this type of data in the world. The measurements made by the Scott Base MF radar provide valuable climate information about how the flow in the middle atmosphere (70-100 km) has changed. This record along with observations from satellite instruments allows the coupling between the middle atmosphere and the surface over Antarctica to be examined, this coupling is often associated with wave-like motions in the atmosphere that the MF radar is particularly good at observing. The circulation is dominated by pole-to-pole flow, from the summer pole to the winter pole. This circulation is largely driven by atmospheric waves with time scales from 15 minutes to 15 days. The large scale of the phenomenon benefits considerably from co-operative observations by our own radar near Christchurch, and by our US colleagues at the South Pole, Admiral Heights (from January 2000) and Tekapo. We also use satellite data for the region between Antarctica and New Zealand. This type of study is important because improvements in the predictive ability of the current generation of climate models may be particularly sensitive to the coupling processes that we examine.

Related URL
Link: GET DATA
Description: A daily update of MF radar data


Link: VIEW RELATED INFORMATION
Description: The investigators homepage


Geographic Coverage
 N: -77.85 S: -77.85  E: 166.75  W: 166.75
 Min Altitude: 40 KM  Max Altitude: 100 KM

Temporal Coverage
Start Date: 2003-01-01


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > SCOTT BASE
GEOGRAPHIC REGION > POLAR


Science Keywords
ATMOSPHERE >ATMOSPHERIC WINDS >UPPER LEVEL WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >VERTICAL WIND MOTION    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND PROFILES    [Definition]
ATMOSPHERE >ALTITUDE >MESOPAUSE    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
GROUND STATIONS    [Information]
GROUND-BASED OBSERVATIONS    [Information]


Quality
This is an ongoing data set from as early as 1982. The investigator upgraded data acquisition and processing system to fall in line with his project objectives in 2003, not in line with historic data collection objectives. He maintains possession of all of this data and is currently using it. If anyone wishes to use it, it is with the investigators permission.


Keywords
ATMOSPHERIC WINDS
MESOSPHERE
CLIMATE CHANGE


Data Set Progress
IN WORK


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
Name: SHULAMIT GORDON
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Personnel
ADRIAN MCDONALD
Role: INVESTIGATOR
Phone: +64 3 364 2281
Fax: +64 3 364 2469
Email: a.mcdonald at phys.canterbury.ac.nz
Contact Address:
Department of Physics and Astronomy
University of Canterbury
Private Bag 4800
City: Christchurch
Country: New Zealand


CEISHA POIROT
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


SHULAMIT GORDON
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745
City: Christchurch
Country: New Zealand


Publications/References
Baumgaertner, A.J.G. McDonald, A.J. Fraser, G.J. Plank, G.E. 2005 Long-term observations of mean winds and tides in the upper mesosphere and lower thermosphere above Scott Base, Antarctica. Journal of atmospheric and solar-terrestrial physics 67(16): 1480-1496

Baumgaertner, A.J.G. Jarvis, M.J. McDonald, A.J. Fraser, G.J. 2006 Observations of wavenumber 1 and 2 components of the semi-diurnal tide over Antarctica. Journal of atmospheric and solar-terrestrial physics 68: 1195-1214 doi:10.1016/j.jastp.2006.03.001

Baumgaertner, A.J.G. McDonald, A.J. 2007 A gravity wave climatology for Antarctica compiled from Challenging Minisatellite Payload/Global Positioning System (CHAMP/GPS) radio occultations. Journal of geophysical research 112: D05103 doi:10.1029/2006JD007504

Baumgaertner, A.J.G. McDonald, A.J. Hibbins, R.E. Fritts, D.C. Murphy, D.J. Vincent, R.A. 2008 Short-period planetary waves in the Antarctic middle atmosphere. Journal of atmospheric and solar-terrestrial physics 70(10): 1336-1350

Fraser, G.J. Marsh, S. Baggaley, W. Bennett, B. Lawrence, B. McDonald, A. Plant, G. 2006 Small-scale structures in common-volume meteor wind measurements. Journal of atmospheric and solar-terrestrial physics 68(3-5): 317-322 doi:10.1016/j.jastp.2005.03.016

Huck, P.E. McDonald, A.J. Bodeker, G.E. Struthers, H. 2005 Interannual variability in ozone depletion controlled by planetary waves and polar temperature. Geophysical research letters 32: L13819 10.1029/2005GL022943

Huck, P.E. Tilmes, S. Bodeker, G.E. Randel, W.J. McDonald, A.J. Nakajima, H. 2007 An improved measure of ozone depletion in the Antarctic stratosphere. Journal of geophysical research 112(D11): D11104 doi:10.1029/2006JD007860, 2007

Kruetzmann, N.C. McDonald, A.J. George, S.E. 2008 Identification of mixing barriers in chemistry-climate-model simulations using Renyi entropy. Geophysical research letters 35: L06806 doi:10.1029/2007GL032829

McDonald, A.J. Baumgaertner, A.J.G. Fraser, G.J. George, S.E. Marsh, S. 2007 Empirical Mode Decomposition of the atmospheric wave field. Annales geophysicae 25: 375-384

McDonald, A.J. 2008 Antarctic ozone depletion and polar stratospheric clouds. Clean air and environmental quality 42(4): 30-35

Murphy, D.J. Forbes, J.M. Walterscheid, R.L. Hagan, M.E. Avery, S.K. Aso, T. Fraser, G.J. Fritts, D.C. Jarvis, M.J. McDonald, A.J. Riggin, D.M. Tsutsumi, M. Vincent, R.A. 2006 The climatology of tides in the Antarctic mesosphere and lower thermosphere. Journal of geophysical research 111: D23104 doi: 10.1029/2005JD006803

Creation and Review Dates
DIF Creation Date: 2009-01-30
Last DIF Revision Date: 2012-06-15

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