Observations of a middle atmosphere thermal structure over Durban using a ground-based Rayleigh LIDAR and satellite data
| Autor: | M. M. Michaelis, Venkataraman Sivakumar, Hassan Bencherif, A. Moorgawa, Sandile B. Malinga, Sadhasivan R. Pillay, Nkanyiso Mbatha |
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| Přispěvatelé: | South African National Space Agency (SANSA), South African National Space Agency, University of KwaZulu-Natal (UKZN), National Laser Centre [Pretoria] (NLC), Council for Scientific and Industrial Research [Pretoria] (CSIR), Department of Geography, Geoinformatics and Meteorology, Faculty of Natural and Agricultural Sciences, University of Pretoria [South Africa], Laboratoire de l'Atmosphère et des Cyclones (LACy), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Science (General)
010504 meteorology & atmospheric sciences Meteorology Science satellite Social Sciences Atmospheric sciences 01 natural sciences Occultation General Biochemistry Genetics and Molecular Biology Atmosphere lcsh:Social Sciences LIDAR Q1-390 Stratopause 0103 physical sciences lcsh:Social sciences (General) lcsh:Science lcsh:Science (General) 010303 astronomy & astrophysics Stratosphere 0105 earth and related environmental sciences [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere middle atmosphere H1-99 temperature lcsh:H Social sciences (General) Depth sounding Lidar 13. Climate action stratosphere General Earth and Planetary Sciences Environmental science Radiometry Satellite lcsh:Q lcsh:H1-99 General Agricultural and Biological Sciences lcsh:Q1-390 |
| Zdroj: | South African Journal of Science, Vol 108, Iss 1/2 (2012) South African Journal of Science South African Journal of Science, AOSIS, 2012, 108 (1/2), pp.9. ⟨10.4102/sajs.v108i1/2.612⟩ South African Journal of Science, Volume: 108, Issue: 1-2, Pages: 01-09, Published: 2012 |
| ISSN: | 1996-7489 0038-2353 |
| DOI: | 10.4102/sajs.v108i1/2.612⟩ |
| Popis: | International audience; Studying the middle atmospheric thermal structure over southern Africa is an important activity to improve the understanding of atmospheric dynamics of this region. Observations of a middle atmosphere thermal structure over Durban, South Africa (29.9°S, 31.0°E) using the Durban Rayleigh Light Detection and Ranging (LIDAR) data collected over 277 nights from April 1999 to July 2004, including closest overpasses of the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) and Halogen Occultation Experiments (HALOE) satellites, are presented in this paper. There seems to be good agreement between the LIDAR and satellite observations. During autumn and winter, the temperatures measured by the LIDAR in the height region between 40 km and 55 km were 5 K to 12 K higher than those measured by the satellites. The data from the LIDAR instrument and the SABER and HALOE satellites exhibited the presence of an annual oscillation in the stratosphere, whereas in the mesosphere, semi-annual oscillations dominated the annual oscillation at some levels. The stratopause was observed in the height range of ~40 km - 55 km by all the instruments, with the stratopause temperatures measured as 260 K - 270 K by the LIDAR, 250 K - 260 K by the SABER and 250 K - 270 K by the HALOE. Data from the SABER and HALOE satellites indicated almost the same thermal structure for the middle atmosphere over Durban. |
| Databáze: | OpenAIRE |
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