Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles

Ding Yi Wang, Gabriele P. Stiller, Thomas von Clarmann, Herbert Fischer, Manuel López-Puertas, Bernd Funke, Norbert Glatthor, Udo Grabowski, Michael Höpfner, Sylvia Kellmann, Michael Kiefer, Andrea Linden, Gizaw Mengistu Tsidu, Mathias Milz, Tilman Steck, Jonathan H. Jiang, Chi O. Ao, Gloria Manney, Klemens Hocke, Dong L. WuLarry J. Romans, Jens Wickert, Torsten Schmidt

Research output: Contribution to journalArticle

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Abstract

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on board the ENVISAT and the Global Positioning System (GPS) receiver on the Challenging Mini-Satellite Payload (CHAMP) provide temperature profiles by limb-viewing midinfrared emission and radio occultation (RO) measurements, respectively. The MIPAS temperatures retrieved at the Institut für Meteorologie und Klimaforschung (IMK) are compared with the GPS-RO/CHAMP observations derived at Jet Propulsion Laboratory (JPL) and GeoForschungsZentrum (GFZ) Potsdam. The three data sets show generally good agreement. The global mean differences averaged between 8 and 30 km in 14 days of September/October 2002 are -0.44 ± 0.02 K and 0.07 ± 0.02 K for MIPAS/GPS-RO JPL and GFZ comparisons, respectively. The MIPAS global mean temperatures below 25 km are slightly lower than those of GPS-RO JPL and GFZ by less than 1 K and 0.2 K, respectiVely. Above 25 km, the MIPAS temperatures are higher than the JPL and GFZ data, in particular near both poles and the equator, with maxima of I K for JPL and 1.5 K for GFZ at 30 km. The standard deviations are ∼2-4 K. Possible explanations for the observed differences include (1) effect of spatial and temporal mismatch between the correlative measurements on the observed standard deviations, in particular in regions and episodes of enhanced wave activity; (2) a negative bias in GPS-RO/CHAMP temperatures in regions of increased humidity; (3) a mapping of initialization temperature profiles on GPS-RO /CHAMP retrievals at altitudes where low refraction contains no information on air density; and (4) measurement errors of both instruments, particularly the errors due to insufficient knowledge of the instrument line shape and spectroscopy in current MIPAS retrievals.

Original languageEnglish
JournalJournal of Geophysical Research D: Atmospheres
Volume109
Issue number19
DOIs
Publication statusPublished - Oct 16 2004

Fingerprint

MIPAS
atmospheric sounding
radio occultation
Michelson interferometers
global positioning systems
Global Positioning System
jet propulsion
payloads
temperature profile
temperature profiles
radio
Global positioning system
GPS
Propulsion
Satellites
payload retrieval (STS)
Temperature
standard deviation
temperature
low altitude

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Oceanography
  • Forestry
  • Ecology
  • Aquatic Science
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Wang, D. Y., Stiller, G. P., von Clarmann, T., Fischer, H., López-Puertas, M., Funke, B., ... Schmidt, T. (2004). Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles. Journal of Geophysical Research D: Atmospheres, 109(19). https://doi.org/10.1029/2004JD004963
Wang, Ding Yi ; Stiller, Gabriele P. ; von Clarmann, Thomas ; Fischer, Herbert ; López-Puertas, Manuel ; Funke, Bernd ; Glatthor, Norbert ; Grabowski, Udo ; Höpfner, Michael ; Kellmann, Sylvia ; Kiefer, Michael ; Linden, Andrea ; Tsidu, Gizaw Mengistu ; Milz, Mathias ; Steck, Tilman ; Jiang, Jonathan H. ; Ao, Chi O. ; Manney, Gloria ; Hocke, Klemens ; Wu, Dong L. ; Romans, Larry J. ; Wickert, Jens ; Schmidt, Torsten. / Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles. In: Journal of Geophysical Research D: Atmospheres. 2004 ; Vol. 109, No. 19.
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title = "Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles",
abstract = "The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on board the ENVISAT and the Global Positioning System (GPS) receiver on the Challenging Mini-Satellite Payload (CHAMP) provide temperature profiles by limb-viewing midinfrared emission and radio occultation (RO) measurements, respectively. The MIPAS temperatures retrieved at the Institut f{\"u}r Meteorologie und Klimaforschung (IMK) are compared with the GPS-RO/CHAMP observations derived at Jet Propulsion Laboratory (JPL) and GeoForschungsZentrum (GFZ) Potsdam. The three data sets show generally good agreement. The global mean differences averaged between 8 and 30 km in 14 days of September/October 2002 are -0.44 ± 0.02 K and 0.07 ± 0.02 K for MIPAS/GPS-RO JPL and GFZ comparisons, respectively. The MIPAS global mean temperatures below 25 km are slightly lower than those of GPS-RO JPL and GFZ by less than 1 K and 0.2 K, respectiVely. Above 25 km, the MIPAS temperatures are higher than the JPL and GFZ data, in particular near both poles and the equator, with maxima of I K for JPL and 1.5 K for GFZ at 30 km. The standard deviations are ∼2-4 K. Possible explanations for the observed differences include (1) effect of spatial and temporal mismatch between the correlative measurements on the observed standard deviations, in particular in regions and episodes of enhanced wave activity; (2) a negative bias in GPS-RO/CHAMP temperatures in regions of increased humidity; (3) a mapping of initialization temperature profiles on GPS-RO /CHAMP retrievals at altitudes where low refraction contains no information on air density; and (4) measurement errors of both instruments, particularly the errors due to insufficient knowledge of the instrument line shape and spectroscopy in current MIPAS retrievals.",
author = "Wang, {Ding Yi} and Stiller, {Gabriele P.} and {von Clarmann}, Thomas and Herbert Fischer and Manuel L{\'o}pez-Puertas and Bernd Funke and Norbert Glatthor and Udo Grabowski and Michael H{\"o}pfner and Sylvia Kellmann and Michael Kiefer and Andrea Linden and Tsidu, {Gizaw Mengistu} and Mathias Milz and Tilman Steck and Jiang, {Jonathan H.} and Ao, {Chi O.} and Gloria Manney and Klemens Hocke and Wu, {Dong L.} and Romans, {Larry J.} and Jens Wickert and Torsten Schmidt",
year = "2004",
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language = "English",
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Wang, DY, Stiller, GP, von Clarmann, T, Fischer, H, López-Puertas, M, Funke, B, Glatthor, N, Grabowski, U, Höpfner, M, Kellmann, S, Kiefer, M, Linden, A, Tsidu, GM, Milz, M, Steck, T, Jiang, JH, Ao, CO, Manney, G, Hocke, K, Wu, DL, Romans, LJ, Wickert, J & Schmidt, T 2004, 'Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles', Journal of Geophysical Research D: Atmospheres, vol. 109, no. 19. https://doi.org/10.1029/2004JD004963

Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles. / Wang, Ding Yi; Stiller, Gabriele P.; von Clarmann, Thomas; Fischer, Herbert; López-Puertas, Manuel; Funke, Bernd; Glatthor, Norbert; Grabowski, Udo; Höpfner, Michael; Kellmann, Sylvia; Kiefer, Michael; Linden, Andrea; Tsidu, Gizaw Mengistu; Milz, Mathias; Steck, Tilman; Jiang, Jonathan H.; Ao, Chi O.; Manney, Gloria; Hocke, Klemens; Wu, Dong L.; Romans, Larry J.; Wickert, Jens; Schmidt, Torsten.

In: Journal of Geophysical Research D: Atmospheres, Vol. 109, No. 19, 16.10.2004.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles

AU - Wang, Ding Yi

AU - Stiller, Gabriele P.

AU - von Clarmann, Thomas

AU - Fischer, Herbert

AU - López-Puertas, Manuel

AU - Funke, Bernd

AU - Glatthor, Norbert

AU - Grabowski, Udo

AU - Höpfner, Michael

AU - Kellmann, Sylvia

AU - Kiefer, Michael

AU - Linden, Andrea

AU - Tsidu, Gizaw Mengistu

AU - Milz, Mathias

AU - Steck, Tilman

AU - Jiang, Jonathan H.

AU - Ao, Chi O.

AU - Manney, Gloria

AU - Hocke, Klemens

AU - Wu, Dong L.

AU - Romans, Larry J.

AU - Wickert, Jens

AU - Schmidt, Torsten

PY - 2004/10/16

Y1 - 2004/10/16

N2 - The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on board the ENVISAT and the Global Positioning System (GPS) receiver on the Challenging Mini-Satellite Payload (CHAMP) provide temperature profiles by limb-viewing midinfrared emission and radio occultation (RO) measurements, respectively. The MIPAS temperatures retrieved at the Institut für Meteorologie und Klimaforschung (IMK) are compared with the GPS-RO/CHAMP observations derived at Jet Propulsion Laboratory (JPL) and GeoForschungsZentrum (GFZ) Potsdam. The three data sets show generally good agreement. The global mean differences averaged between 8 and 30 km in 14 days of September/October 2002 are -0.44 ± 0.02 K and 0.07 ± 0.02 K for MIPAS/GPS-RO JPL and GFZ comparisons, respectively. The MIPAS global mean temperatures below 25 km are slightly lower than those of GPS-RO JPL and GFZ by less than 1 K and 0.2 K, respectiVely. Above 25 km, the MIPAS temperatures are higher than the JPL and GFZ data, in particular near both poles and the equator, with maxima of I K for JPL and 1.5 K for GFZ at 30 km. The standard deviations are ∼2-4 K. Possible explanations for the observed differences include (1) effect of spatial and temporal mismatch between the correlative measurements on the observed standard deviations, in particular in regions and episodes of enhanced wave activity; (2) a negative bias in GPS-RO/CHAMP temperatures in regions of increased humidity; (3) a mapping of initialization temperature profiles on GPS-RO /CHAMP retrievals at altitudes where low refraction contains no information on air density; and (4) measurement errors of both instruments, particularly the errors due to insufficient knowledge of the instrument line shape and spectroscopy in current MIPAS retrievals.

AB - The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on board the ENVISAT and the Global Positioning System (GPS) receiver on the Challenging Mini-Satellite Payload (CHAMP) provide temperature profiles by limb-viewing midinfrared emission and radio occultation (RO) measurements, respectively. The MIPAS temperatures retrieved at the Institut für Meteorologie und Klimaforschung (IMK) are compared with the GPS-RO/CHAMP observations derived at Jet Propulsion Laboratory (JPL) and GeoForschungsZentrum (GFZ) Potsdam. The three data sets show generally good agreement. The global mean differences averaged between 8 and 30 km in 14 days of September/October 2002 are -0.44 ± 0.02 K and 0.07 ± 0.02 K for MIPAS/GPS-RO JPL and GFZ comparisons, respectively. The MIPAS global mean temperatures below 25 km are slightly lower than those of GPS-RO JPL and GFZ by less than 1 K and 0.2 K, respectiVely. Above 25 km, the MIPAS temperatures are higher than the JPL and GFZ data, in particular near both poles and the equator, with maxima of I K for JPL and 1.5 K for GFZ at 30 km. The standard deviations are ∼2-4 K. Possible explanations for the observed differences include (1) effect of spatial and temporal mismatch between the correlative measurements on the observed standard deviations, in particular in regions and episodes of enhanced wave activity; (2) a negative bias in GPS-RO/CHAMP temperatures in regions of increased humidity; (3) a mapping of initialization temperature profiles on GPS-RO /CHAMP retrievals at altitudes where low refraction contains no information on air density; and (4) measurement errors of both instruments, particularly the errors due to insufficient knowledge of the instrument line shape and spectroscopy in current MIPAS retrievals.

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Wang DY, Stiller GP, von Clarmann T, Fischer H, López-Puertas M, Funke B et al. Cross-validation of MIPAS/ENVISAT and GPS-RO/CHAMP temperature profiles. Journal of Geophysical Research D: Atmospheres. 2004 Oct 16;109(19). https://doi.org/10.1029/2004JD004963