Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) scientific objectives

Riese, Martin; Oelhaf, H.; Preusse, Peter; Blank, J.; Ern, Manfred; Friedl-Vallon, Felix; Fischer, H.; Guggenmoser, T.; Höpfner, Michael; Hoor, Peter; Kaufmann, Martín; Orphal, J.; Plöger, Felix; Spang, Reinhold; Suminska-Ebersoldt, O.; Ungermann, Jörn; Vogel, Bärbel; Woiwode, Wolfgang

doi:10.5194/amt-7-1915-2014

Cited by 110 publications

(120 citation statements)

References 95 publications

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“…Further, also non-vertical propagation of gravity waves should be considered. A more quantitative observational approach would be possible by the limb imaging technique, i.e., an improvement of conventional limb measurement techniques (e.g., Preusse et al, 2009aPreusse et al, , 2014Riese et al, 2014). This technique would provide directional information of gravity waves, and also errors could be considerably reduced.…”

Section: Summary and Discussionmentioning

confidence: 99%

Satellite observations of middle atmosphere gravity wave absolute momentum flux and of its vertical gradient during recent stratospheric warmings

Ern¹,

Trinh²,

Kaufmann³

et al. 2016

Atmos. Chem. Phys.

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Abstract. Sudden stratospheric warmings (SSWs) are circulation anomalies in the polar region during winter. They mostly occur in the Northern Hemisphere and affect also surface weather and climate. Both planetary waves and gravity waves contribute to the onset and evolution of SSWs. While the role of planetary waves for SSW evolution has been recognized, the effect of gravity waves is still not fully understood, and has not been comprehensively analyzed based on global observations. In particular, information on the gravity wave driving of the background winds during SSWs is still missing.

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Section: Summary and Discussionmentioning

confidence: 99%

Satellite observations of middle atmosphere gravity wave absolute momentum flux and of its vertical gradient during recent stratospheric warmings

Ern¹,

Trinh²,

Kaufmann³

et al. 2016

Atmos. Chem. Phys.

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“…This limitation could be overcome, for example, by the infrared limb-imaging technique, giving full 3-D information about the observed gravity waves by additionally providing observations for the direction across the satellite measurement track. For a more detailed discussion of this measurement technique and its capabilities see, for example, Riese et al (2005Riese et al ( , 2014 or Preusse et al (2009Preusse et al ( , 2014.…”

Section: Discussionmentioning

confidence: 99%

Driving of the SAO by gravity waves as observed from satellite

Ern¹,

Preusse²,

Riese³

2015

Ann. Geophys.

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Abstract. It is known that atmospheric dynamics in the tropical stratosphere have an influence on higher altitudes and latitudes as well as on surface weather and climate. In the tropics, the dynamics are governed by an interplay of the quasi-biennial oscillation (QBO) and semiannual oscillation (SAO) of the zonal wind. The QBO is dominant in the lower and middle stratosphere, and the SAO in the upper stratosphere/lower mesosphere. For both QBO and SAO the driving by atmospheric waves plays an important role. In particular, the role of gravity waves is still not well understood.In our study we use observations of the High Resolution Dynamics Limb Sounder (HIRDLS) satellite instrument to derive gravity wave momentum fluxes and gravity wave drag in order to investigate the interaction of gravity waves with the SAO. These observations are compared with the ERA-Interim reanalysis. Usually, QBO westward winds are much stronger than QBO eastward winds. Therefore, mainly gravity waves with westward-directed phase speeds are filtered out through critical-level filtering already below the stratopause region. Accordingly, HIRDLS observations show that gravity waves contribute to the SAO momentum budget mainly during eastward wind shear, and not much during westward wind shear. These findings confirm theoretical expectations and are qualitatively in good agreement with ERA-Interim and other modeling studies. In ERAInterim most of the westward SAO driving is due to planetary waves, likely of extratropical origin. Still, we find in both observations and ERA-Interim that sometimes westwardpropagating gravity waves may contribute to the westward driving of the SAO. Four characteristic cases of atmospheric background conditions are identified. The forcings of the SAO in these cases are discussed in detail, supported by gravity wave spectra observed by HIRDLS. In particular, we find that the gravity wave forcing of the SAO cannot be explained by critical-level filtering alone; gravity wave saturation without critical levels being reached is also important.

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“…This will lead to interruptions in atmospheric trend monitoring. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA; Riese et al, 2014), an airborne Fourier transform spectrometer (FTS), can help to fill the gap. Furthermore, it makes a comparison of current satellite instruments with future ones possible, as it can provide reference measurements now and in the future.…”

Section: Introductionmentioning

confidence: 99%

Characterization of blackbody inhomogeneity and its effect on the retrieval results of the GLORIA instrument

Kleinert

Krisch²,

Ungermann³

et al. 2018

Atmos. Meas. Tech.

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Abstract. Limb sounding instruments play an important role in the monitoring of climate trends, as they provide a good vertical resolution. Traceability to the International System of Units (SI) via onboard reference or transfer standards is needed to compare trend estimates from multiple instruments. This study investigates the required uncertainty of these radiation standards to properly resolve decadal trends of climate-relevant trace species like ozone, water vapor, and temperature distribution for the Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA). Temperature nonuniformities of the onboard reference blackbodies, used for radiometric calibration, have an impact on the calibration uncertainty. The propagation of these nonuniformities through the retrieval is analyzed. A threshold for the maximum tolerable uncertainty of the blackbody temperature is derived, so that climate trends can be significantly identified with GLORIA.

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Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) scientific objectives

Cited by 110 publications

References 95 publications

Satellite observations of middle atmosphere gravity wave absolute momentum flux and of its vertical gradient during recent stratospheric warmings

Satellite observations of middle atmosphere gravity wave absolute momentum flux and of its vertical gradient during recent stratospheric warmings

Driving of the SAO by gravity waves as observed from satellite

Characterization of blackbody inhomogeneity and its effect on the retrieval results of the GLORIA instrument

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