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Research interests
Stratospheric ozone depletion: Arctic ozone depletion in the stratosphere occurs each winter with different strength depending on conditions such as the strength of the arctic vortex (the dynamical conditions), temperature development, amounts of aerosols and trace constituents and presence of polar stratospheric clouds. Meteorological conditions and the amount of ozone present is monitored throughout the winter from many stations operated by many countries. Through the EU project QUOBI I have been involved in performing calculations of the ozone depletion in the winter 2002/03 by the vortex-averaged method.
The tropical tropopause layer: The lower stratosphere has a very low water vapour content compared to the troposphere. Air transported from the troposphere into the stratosphere is subject to dehydration, but the detailed process is not well-known. In order to better understand the dynamics, chemistry and physics of the tropical tropopause layer, stratospheric balloons financed by the EU project HIBISCUS are flown in the tropics. I am involved in validating winds and temperatures as derived from the operational ECMWF model with in-situ measurements from the balloons.
Education
1997: M.Sc. in physics and chemistry, thesis on astrophysics, University of Aarhus, Denmark
2002: Ph.D. in space physics, Niels Bohr Institute, Copenhagen University, Denmark. The research was carried out at the Solar-Terrestrial Physics Division at DMI.
Employment, duties and work experience
Since 2003: Danish Meteorological Institute, Middle Atmosphere Reserch Division, Post.Doc.
1999-2002: Danish Meteorological Institute, Solar-Terrestrial Physics Division, Ph.D. student
1998-1999: Danish Meteorological Institute, Solar-Terrestrial Physics Division, Research scientist
1996-1997: Nordic Optical Telesope (Spain), Support astronomer
- Vice-president of the Network for Women in Physics in Denmark
- Member of the Danish Physical Society
- Member of the American Geophysical Union
List of Publications
Publications in refereed journals
Conjugate High-Intensity Energetic Electron Precipitation at High Latitude,
Christensen, T., Østgaard, N., Rosenberg, T.J., Detrick, D.L., Germany, G.A., Stauning, P.,2003
Annales Geophysicae, 21, 1443-1455
Available as 2.4 MB pdf file.
A Sulphur Abundance Study of NGC 300 By an Empirical Calibration Method,
Christensen, T., Petersen, L., Gammelgaard, P., 1997
Astronomy and Astrophysics, 322, 41
Available as 240 kB pdf file.
Publications in refereed conference proceedings (first-author papers only)
Vortex-averaged ozone losses in the winter 2002/2003,
Christensen, T., Knudsen, B.M., Andersen, S.B., Benesova, A., Bojkov, B.R., Claude, H., Davies, J., De Backer, H., Dier, H., Dorokhov, V., Gerding, M., Gil, M., Henchoz, B., Kelder, H., Kivi, R., Kyrö, E., Litynska, Z., Peters, G., Shearman, R.J., Skrivankova, P., Stubi, R., Turunen, T., Vaughan, G., Viatte, P., von der Gathen, P., Zaitcev, I., 2004
submitted to Proceedings of the Quadrennial Ozone Symposium, June 1-8, 2004, kos, Greece.
Available as 60 kB pdf file.
Publications in conference proceedings (first-author papers only)
Event Study of High-Energy Electron Precipitation by Comparison of Ørsted Data and Ground-Based Observations,
Christensen, T., Stauning, P., Christiansen, F., Thayer, J., 2000
Neubert, T. and Ultré-Guérard, P. (eds.), Proceedings of Ørsted 3rd International Science Teem Meeting, DMI technical report
Available as 700 kB pdf file.
Theses
Energetic Electron Precipitation Studied by Atmospheric X-rays
Tina Christensen, September 2002
Ph.D. Thesis, Faculty of Science, Copenhagen University
Available as 5.5 MB pdf file.
Empirical Sulphur Abundance Determination from Optical and Near-IR Spectrophotometry of H II Regions in Spiral Galaxies
Tina Christensen, May 1997
Master's Thesis, Institute of Physics and Astronomy, University of Aarhus, Denmark
Available as 1.3 MB pdf file. Seperate frontpage in 260 kB pdf file.
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