umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Studies of planetary waves in ozone and temperature fields as observed by the Odin satellite in 2002-2007
Umeå University, Faculty of Science and Technology, Physics.
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The results presented in this PhD thesis are mainly based on measurements collected by the advanced sub-mm radiometer (SMR) aboard the Odin satellite in 2002-2007. The primary data are series of temperature and ozone profiles in the middle atmosphere up to 68 km. These data are used to estimate global properties of planetary wave propagation in both horizontal and vertical directions. As good-quality retrievals from Odin are not available above 68 km, additional data sources have been considered in order to extend coverage of planetary wave properties to higher levels. These sources are temperature observations at 85-90 km obtained by the ground-based meteor radars located in the polar region in the Northern Hemisphere in Scandinavia at Esrange and at Andenes, and in Canada at Resolute Bay and at Yellowknife. Also, the series of ozone profiles from the ground-based Kiruna mm-wave radiometer, KIMRA, are used in order to compare the wave properties in ozone fields measured globally by Odin and locally by KIMRA.

The main task of this PhD thesis is to study the 5-day planetary wave characteristics in the Earth’s atmosphere. The influence of waves on the atmospheric circulation causes, for example, substantial local departures from radiative equilibrium, observed in the winter stratosphere and close to the summer mesopause. Seasonal variations of the 5-day planetary wave properties and physical phenomena related to these variations are also studied in this thesis.

During winter, planetary waves propagate freely in the vertical direction, and maximal wave amplitudes are found in the extratropical stratosphere. The Northern Hemisphere (NH) winter periods of 2002-2003 and 2005 have been examined and a comparison has been carried out between the planetary wave properties in temperature and ozone variations. In general, the results show an expected in-phase behavior between the temperature and ozone fields in the lower stratosphere (due to dynamic effects) and an out-of-phase pattern in the upper stratosphere (which is expected as a result of photochemical effects).

Earlier theoretical and experimental studies have shown that, despite unfavourable summertime wind conditions, 5-day planetary waves can be registered not only in the stratosphere but also at higher altitudes in the mesosphere. The NH summers of 2003-2005 and 2007 have been considered and results have confirmed the existence of 5-day planetary waves up to the mesopause level (85-90 km). The results demonstrate that, for different periods, the possible source of the observed waves could be located at lower altitudes in both hemispheres with successive propagation into the summer mesosphere, or the waves could be generated in-situ as a result of the baroclinic instability of summer easterly jet.

Place, publisher, year, edition, pages
Umeå: Fysik , 2008. , 35 p.
Series
IRF Scientific Report, ISSN 0284-1703 ; 298
Keyword [en]
middle atmosphere dynamics, planetary waves, 5-day planetary wave, temperature-ozone relationship, Odin satellite
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:umu:diva-1819ISBN: 978-91-7264-613-1 (print)OAI: oai:DiVA.org:umu-1819DiVA: diva2:142105
Public defence
2008-09-30, IRF:s aula, IRF, Kiruna, 10:00
Opponent
Supervisors
Available from: 2008-09-09 Created: 2008-09-09Bibliographically approved
List of papers
1. Five-day planetary waves as seen by Odin satellite and the ground-based Kiruna millimeter wave radiometer in January-March 2005
Open this publication in new window or tab >>Five-day planetary waves as seen by Odin satellite and the ground-based Kiruna millimeter wave radiometer in January-March 2005
Show others...
2008 In: Canadian Journal of Physics, ISSN 0008-4204, Vol. 86, no 3, 459-466 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-3417 (URN)
Available from: 2008-09-09 Created: 2008-09-09Bibliographically approved
2. Five-day planetary waves in the middle atmosphere from Odin satellite data and ground-based instruments in Northern Hemisphere summer 2003, 2004, 2005 and 2007
Open this publication in new window or tab >>Five-day planetary waves in the middle atmosphere from Odin satellite data and ground-based instruments in Northern Hemisphere summer 2003, 2004, 2005 and 2007
Show others...
2008 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 26, 3557-3570 p.Article in journal (Refereed) Published
Abstract [en]

A number of studies have shown that 5-day planetary waves modulate noctilucent clouds and the closely related Polar Mesosphere Summer Echoes (PMSE) at the summer mesopause. Summer stratospheric winds should inhibit wave propagation through the stratosphere and, although some numerical models (Geisler and Dickinson, 1976) do show a possibility for upward wave propagation, it has also been suggested that the upward propagation may in practice be confined to the winter hemisphere with horizontal propagation of the wave from the winter to the summer hemisphere at mesosphere heights causing the effects observed at the summer mesopause. It has further been proposed (Garcia et al., 2005) that 5-day planetary waves observed in the summer mesosphere could be excited in-situ by baroclinic instability in the upper mesosphere. In this study, we first extract and analyze 5-day planetary wave characteristics on a global scale in the middle atmosphere (up to 54 km in temperature, and up to 68 km in ozone concentration) using measurements by the Odin satellite for selected days during northern hemisphere summer from 2003, 2004, 2005 and 2007. Second, we show that 5-day temperature fluctuations consistent with westward-traveling 5-day waves are present at the summer mesopause, using local ground-based meteor-radar observations. Finally we examine whether any of three possible sources of the detected temperature fluctuations at the summer mesopause can be excluded: upward propagation from the stratosphere in the summer-hemisphere, horizontal propagation from the winter-hemisphere or in-situ excitation as a result of the baroclinic instability. We find that in one case, far from solstice, the baroclinic instability is unlikely to be involved. In one further case, close to solstice, upward propagation in the same hemisphere seems to be ruled out. In all other cases, all or any of the three proposed mechanisms are consistent with the observations.

Place, publisher, year, edition, pages
Copernicus publications, 2008
National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:umu:diva-3418 (URN)10.5194/angeo-26-3557-2008 (DOI)
Available from: 2008-09-09 Created: 2008-09-09 Last updated: 2017-12-14Bibliographically approved
3. Planetary waves in ozone and temperature in the Northern hemisphere winter of 2002-2003 by Odin satellite data
Open this publication in new window or tab >>Planetary waves in ozone and temperature in the Northern hemisphere winter of 2002-2003 by Odin satellite data
2009 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 27, 1189-1206 p.Article in journal (Refereed) Published
Abstract [en]

Temperature and ozone data from the sub-millimetre radiometer (SMR) installed aboard the Odin satellite have been examined to study the relationship between temperature and ozone concentration in the lower and upper stratosphere in winter time. The retrieved ozone and temperature profiles have been considered between the range of 24–46 km during the Northern Hemisphere (NH) winter of December 2002 to March 2003 and January to March 2005. A comparison between the ozone mixing ratio and temperature fields has been made for the zonal means, wavenumber one variations and 5-day planetary waves. The amplitude values in temperature variations are ~5 K in the wavenumber one and 0.5–1 K in the 5-day wave. In ozone mixing ratio, the amplitudes reach ~0.5 ppmv in the wavenumber one and 0.05–0.1 ppmv in the 5-day wave.

Several stratospheric warming events were observed during the NH winters of 2002/2003 and early 2005. Along with these warming events, amplification of the amplitude has been detected in wavenumber one (up to 30 K in temperature and 1.25 ppmv in ozone) and partly in the 5-day perturbation (up to 2 K in temperature and 0.2 ppmv in ozone). 

In general, the results show the expected in-phase behavior between the temperature and ozone fields in the lower stratosphere due to dynamic effects, and an out-of-phase pattern in the upper stratosphere, which is expected as a result of photochemical effects. However, these relationships are not valid for zonal means and wavenumber one components when the wave amplitudes are changing dramatically during the strongest stratospheric warming event (at the end of December 2002/beginning of January 2003). Also, for several shorter intervals, the 5-day perturbations in ozone and temperature are not well-correlated at lower heights, particularly when conditions change rapidly. 

Odin's basic observation schedule provides stratosphere mode data every third day and to validate the reliability of the 5-day waves extracted from the Odin measurements, additional independent data have been analysed in this study: temperature assimilation data by the European Centre for Medium-range Weather Forecasts (ECMWF) for the NH winter of 2002/2003, and satellite measurements of temperature and ozone by the Microwave Limb Sounder (MLS) on board the Aura satellite for the NH winter in early 2005. 

Good agreement between the temperature fields from Odin and ECMWF data is found at middle latitude where, in general, the 5-day perturbations from the two data sets coincide in both phase and amplitude throughout the examined interval. Analysis of the wavenumber one and the 5-day wave perturbations in temperature and ozone fields from Odin and from Aura demonstrates that, for the largest part of the examined period, quite similar characteristics are found in the spatial and temporal domain, with slightly larger amplitude values seen by Aura. Hence, the comparison between the Odin data, sampled each third day, and daily data from Aura and the ECMWF shows that the Odin data are sufficiently reliable to estimate the properties of the 5-day oscillations, at least for the locations and time intervals with strong wave activity.

Place, publisher, year, edition, pages
Copernicus publications, 2009
National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:umu:diva-3419 (URN)10.5194/angeo-27-1189-2009 (DOI)
Available from: 2008-09-09 Created: 2008-09-09 Last updated: 2017-12-14Bibliographically approved
4. Intercomparison of Odin-SMR ozone profiles with ground-based millimetre-wave observations in the Arctic, the mid-latitudes, and the tropics
Open this publication in new window or tab >>Intercomparison of Odin-SMR ozone profiles with ground-based millimetre-wave observations in the Arctic, the mid-latitudes, and the tropics
Show others...
2007 In: Canadian Journal of Physics, ISSN 0008-4204, Vol. 85, no 11, 1097-1110 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-3420 (URN)
Available from: 2008-09-09 Created: 2008-09-09Bibliographically approved
5. Polar mesocyclones and their extension to the UTLS - a case study using ESRAD, Odin and MaCWAVE radiosondes
Open this publication in new window or tab >>Polar mesocyclones and their extension to the UTLS - a case study using ESRAD, Odin and MaCWAVE radiosondes
Show others...
2007 In: Proceedings of the 18th ESA Symposium on European Rocket and Balloon Programmes and Related research, Visby, Sweden, June 2007, 2007, 585-588 p.Chapter in book (Other academic) Published
Identifiers
urn:nbn:se:umu:diva-3421 (URN)
Available from: 2008-09-09 Created: 2008-09-09Bibliographically approved

Open Access in DiVA

fulltext(822 kB)575 downloads
File information
File name FULLTEXT01.pdfFile size 822 kBChecksum SHA-1
214925bf2dffa78ca9a6b08e3bf2e376c4eb4798aa6f34b16f5b30b1072dcaf7dfa2b568
Type fulltextMimetype application/pdf

By organisation
Physics
Meteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 575 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 546 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf