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Mipas Reduced Spectral Resolution Utls-1 Mode Measurements of Temperature, O3, Hno3, N2O, H2O and Relative Humidity Over Ice: Retrievals and Comparison to Mls : Volume 2, Issue 1 (25/02/2009)

By Chauhan, S.

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Book Id: WPLBN0003979226
Format Type: PDF Article :
File Size: Pages 49
Reproduction Date: 2015

Title: Mipas Reduced Spectral Resolution Utls-1 Mode Measurements of Temperature, O3, Hno3, N2O, H2O and Relative Humidity Over Ice: Retrievals and Comparison to Mls : Volume 2, Issue 1 (25/02/2009)  
Author: Chauhan, S.
Volume: Vol. 2, Issue 1
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Höpfner, M., Lambert, A., Schwartz, M., Clarmann, T. V., Stiller, G. P., Glatthor, N.,...Linden, A. (2009). Mipas Reduced Spectral Resolution Utls-1 Mode Measurements of Temperature, O3, Hno3, N2O, H2O and Relative Humidity Over Ice: Retrievals and Comparison to Mls : Volume 2, Issue 1 (25/02/2009). Retrieved from http://www.ebooklibrary.org/


Description
Description: Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Germany. During several periods since 2005 the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on Envisat has performed observations dedicated to the region of the upper troposphere/lower stratosphere (UTLS). For the duration of November/December 2005 global distributions of temperature and several trace gases from MIPAS UTLS-1 mode measurements have been retrieved using the IMK/IAA (Institut für Meteorologie und Klimaforschung/Instituto de Astrofísica de Andalucía) scientific processor. In the UTLS region a vertical resolution of 2.5 to 3 km has been achieved. The retrieved temperature, H2O, O3, HNO3, N2O, and relative humidity over ice are intercompared with the Microwave Limb Sounder (MLS/Aura) v2.2 data. In general, MIPAS and MLS temperatures agree within ±4 K over the whole pressure range of 316–0.68 hPa. Systematic, latitude-independent differences of −2 to −4 K (MIPAS-MLS) at 121 hPa are explained by previously observed biases in the MLS v2.2 temperature retrievals. Temperature differences of −4 K up to 12 K above 10.0 hPa are present similarly in MIPAS and MLS with respect to ECMWF (European Centre for Medium-Range Weather Forecasts) and are likely due to deficiencies of the ECMWF analysis data. MIPAS and MLS stratospheric volume mixing ratios (vmr) of H2O agree within ±1 ppmv, with indication of oscillations between 146 and 26 hPa in the MLS dataset. Tropical upper tropospheric values of relative humidity over ice measured by the two instruments differ by ±20% in the pressure range ~146 to 68 hPa. These differences are mainly caused by the MLS temperature biases. Ozone mixing ratios agree within 0.5 ppmv (10 to 20%) between 68 and 14 hPa. At pressures smaller than 10 hPa, MIPAS O3 vmr are higher than MLS by an average of 0.5 ppmv (10%). General agreement between MIPAS and MLS HNO3 is within the range of −1.0 (−10%) to 1.0 ppbv (20%). MIPAS HNO3 is 1.0 ppbv (10%) higher compared to MLS in the height range of 46 to 10 hPa over the Northern Hemisphere. Over the tropics at 31.6 hPa MLS shows a low bias of more than 1 ppbv (>50%). In general, MIPAS and MLS N2O vmr agree within 20 to 40 ppbv (20 to 40%). Differences in the height range between 100 to 21 hPa are attributed to a known 20% positive bias in MIPAS N2O data.

Summary
MIPAS reduced spectral resolution UTLS-1 mode measurements of temperature, O3, HNO3, N2O, H2O and relative humidity over ice: retrievals and comparison to MLS

Excerpt
Echle, G., von Clarmann, T., Dudhia, A., Flaud, J.-M., Funke, B., Glatthor, N., Kerridge, B., López-Puertas, M., Mart\'\in-Torres, F J., and Stiller, G P.: Optimized spectral microwindows for data analysis of the Michelson Interferometer for Passive Atmospheric Sounding on the Environmental Satellite, Appl. Optics, 39, 5531–5540, 2000.; Eriksson, P., Ekström, M., Rydberg, B., and Murtagh, D. P.: First Odin sub-mm retrievals in the tropical upper troposphere: ice cloud properties, Atmos. Chem. Phys., 7, 471–483, 2007.; Fischer, H., Birk, M., Blom, C., Carli, B., Carlotti, M., von Clarmann, T., Delbouille, L., Dudhia, A., Ehhalt, D., Endemann, M., Flaud, J. M., Gessner, R., Kleinert, A., Koopman, R., Langen, J., López-Puertas, M., Mosner, P., Nett, H., Oelhaf, H., Perron, G., Remedios, J., Ridolfi, M., Stiller, G., and Zander, R.: MIPAS: an instrument for atmospheric and climate research, Atmos. Chem. Phys., 8, 2151–2188, 2008.; Froidevaux, L., Jiang, Y., Lambert, A., Livesey, N., Read, W., Waters, J., Browell, E., Hair, J., Avery, M., McGee, T., Twigg, L., Sumnicht, G., Jucks, K., Margitan, J., Sen, B., Stachnik, R., Toon, G., Bernath, P., Boone, C., Walker, K., Filipiak, M., Harwood, R., Fuller, R., Manney, G., Schwartz, M., Daffer, W., Drouin, B., Cofield, R., Cuddy, D., Jarnot, R., Knosp, B., Perun, V., Snyder, W., Stek, P., Thurstans, R., and Wagner, P.: Validation of Aura Microwave Limb Sounder stratospheric ozone measurements, J. Geophys. Res., 113, D15S20, \doi10.1029/2007JD008771, 2008.; Gille, J., Barnett, J., Arter, P., Barker, M., Bernath, P., Boone, C., Cavanaugh, C., Chow, J., Coffey, M., Craft, J., Craig, C., Dials, M., Dean, V., Eden, T., Edwards, D., Francis, G., Halvorson, C., Harvey, L., Hepplewhite, C., Khosravi, R., Kinnison, D., Krinsky, C., Lambert, A., Lee, H., Lyjak, L., Loh, J., Mankin, W., Massie, S., McInerney, J., Moorhous, J., Nardi, B., Packman, D., Randall, C., Reburn, J., Rudolf, W., Schwartz, M., Serafin, J., Stone, K., Torpy, B., Walker, K., Waterfall, A., Watkins, R., Whitney, J., Woodard, D., and Young, G.: The High Resolution Dynamics Limb Sounder (HIRDLS): Experiment Overview, Recovery and Validation of Initial Temperature Data, J. Geophys. Res., 113, D16S43, \doi10.1029/2007JD008824, 2008.; von Clarmann, T., De Clercq, C., Ridolfi, M., Höpfner, M., and Lambert, J.-C.: The horizontal resolution of MIPAS, Atmos. Meas. Tech., 2, 47-54, 2009.; Beer, R., Glavich, T A., and Rider, D M.: Tropospheric emission spectrometer for the Earth Observing System's Aura satellite, Appl. Optics, 40, 2356–2367, 2001.; Ceccherini, S., Cortesi, U., Verronen, P. T., and Kyrölä, E.: Technical Note: Continuity of MIPAS-ENVISAT operational ozone data quality from full- to reduced-spectral-resolution operation mode, Atmos. Chem. Phys., 8, 2201–2212, 2008.; Glatthor, N., von Clarmann, T., Fischer, H., Funke, B., Grabowski, U., Höpfner, M., Kellmann, S., Kiefer, M., Linden, A., Milz, M., Steck, T., Stiller, G P., Mengistu Tsidu, G., and Wang, D Y.: Mixing processes during the Antarctic vortex split in September/October 2002 as inferred from source gas and ozone distributions from ENVISAT-MIPAS, J. Atmos. Sci., 62, 787–800, 2005.; Glatthor, N., von Clarmann, T., Fischer, H., Funke, B., Grabowski, U., Höpfner, M., Kellmann, S., Kiefer, M., Linden, A., Milz, M., Steck, T., and Stiller, G. P.: Global peroxyacetyl nitrate (PAN) retrieval in the upper troposphere from limb emission spectra of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), Atmos. Chem. Phys., 7, 2775–2787, 2007.; Goff, J A. and Gratch, S.: Low-pressure properties of water from −160 to 212 F, in: Transactions of the American society of heating and ventilating engineers, presented at: 52nd Annual Meeting of the American Society of Heating and Ventilating Engineers New York, 95–122, 1946.; Höpfner, M., Orphal, J., von Clarmann, T., Stiller, G., and Fischer, H.: Stratospheric BrONO2 observed by MIPAS, Atmos. Chem. Phys. Discuss

 

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