Back to Search
Start Over
Intercomparison of stratospheric gravity wave observations with AIRS and IASI
- Source :
- Atmospheric measurement techniques discussions 7(8), 8415-8464 (2014). doi:10.5194/amtd-7-8415-2014, Atmospheric Measurement Techniques, Vol 7, Iss 12, Pp 4517-4537 (2014), Atmospheric Measurement Techniques, Atmospheric Measurement Techniques, European Geosciences Union, 2014, 7, pp.4517-4537. ⟨10.5194/amt-7-4517-2014⟩, Atmospheric measurement techniques 7(12), 4517-4537 (2014). doi:10.5194/amt-7-4517-2014, Atmospheric Measurement Techniques, 2014, 7, pp.4517-4537. ⟨10.5194/amt-7-4517-2014⟩, EGU General Assembly 2015, EGU General Assembly 2015, Apr 2015, Vienna, Austria. pp.id. 1475, 2015
- Publication Year :
- 2014
- Publisher :
- Copernicus, 2014.
-
Abstract
- International audience; Gravity waves are an important driver for the atmospheric circulation and have substantial impact on weather and climate. Satellite instruments offer excellent opportunities to study gravity waves on a global scale. This study focuses on observations from the Atmospheric Infrared Sounder (AIRS) onboard the National Aeronautics and Space Administration's Aqua satellite and the Infrared Atmospheric Sounding Interferometer (IASI) onboard the European MetOp satellites. The main aim of this study is an intercomparison of stratospheric gravity wave observations of both instruments. In particular, we analyzed AIRS and IASI 4.3 μm brightness temperature measurements, which directly relate to stratospheric temperature. Three case studies showed that AIRS and IASI provide a clear and consistent picture of the temporal development of individual gravity wave events. Statistical comparisons based on a five-year period of measurements (2008 - 2012) showed similar spatial and temporal patterns of gravity wave activity. However, the statistical comparisons also revealed systematic differences of variances between AIRS and IASI that we attribute to the different spatial measurement characteristics of both instruments. We also found differences between day- and nighttime data that are partly due to the local time variations of the gravity wave sources. While AIRS has been used successfully in many previous gravity wave studies, IASI data are applied here for the first time for that purpose. Our study shows that gravity wave observations from different hyperspectral infrared sounders such as AIRS and IASI can be directly related to each other, if instrument-specific characteristics such as different noise levels and spatial resolution and sampling are carefully considered. The ability to combine observations from different satellites provides an opportunity to create a long-term record, which is an exciting prospect for future climatological studies of stratospheric gravity wave activity. Reference: Hoffmann, L., Alexander, M. J., Clerbaux, C., Grimsdell, A. W., Meyer, C. I., Rößler, T., and Tournier, B.: Intercomparison of stratospheric gravity wave observations with AIRS and IASI, Atmos. Meas. Tech. Discuss., 7, 8415-8464, doi:10.5194/amtd-7-8415-2014, 2014.
- Subjects :
- Atmospheric Science
010504 meteorology & atmospheric sciences
Meteorology
Atmospheric circulation
[SDE.MCG]Environmental Sciences/Global Changes
Infrared atmospheric sounding interferometer
010502 geochemistry & geophysics
01 natural sciences
[PHYS.PHYS.PHYS-AO-PH] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
ddc:550
Gravity wave
lcsh:TA170-171
Physics::Atmospheric and Oceanic Physics
0105 earth and related environmental sciences
Remote sensing
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
Gravitational wave
lcsh:TA715-787
lcsh:Earthwork. Foundations
lcsh:Environmental engineering
13. Climate action
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology
Brightness temperature
Local time
Atmospheric Infrared Sounder
Environmental science
Satellite
Subjects
Details
- Language :
- English
- ISSN :
- 18671381 and 18678548
- Database :
- OpenAIRE
- Journal :
- Atmospheric measurement techniques discussions 7(8), 8415-8464 (2014). doi:10.5194/amtd-7-8415-2014, Atmospheric Measurement Techniques, Vol 7, Iss 12, Pp 4517-4537 (2014), Atmospheric Measurement Techniques, Atmospheric Measurement Techniques, European Geosciences Union, 2014, 7, pp.4517-4537. ⟨10.5194/amt-7-4517-2014⟩, Atmospheric measurement techniques 7(12), 4517-4537 (2014). doi:10.5194/amt-7-4517-2014, Atmospheric Measurement Techniques, 2014, 7, pp.4517-4537. ⟨10.5194/amt-7-4517-2014⟩, EGU General Assembly 2015, EGU General Assembly 2015, Apr 2015, Vienna, Austria. pp.id. 1475, 2015
- Accession number :
- edsair.doi.dedup.....6fcc4cfa99487c43e64032267231487a