Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6662
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dc.contributor.authorallFiorucci, I.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallMuscari, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallFroidevaux, L.; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAen
dc.contributor.authorallSantee, M. L.; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAen
dc.contributor.authorallDe Zafra, R. L.; State University of New York, Stony Brook, NY, USAen
dc.date.accessioned2011-01-14T09:50:51Zen
dc.date.available2011-01-14T09:50:51Zen
dc.date.issued2010-09-27en
dc.identifier.urihttp://hdl.handle.net/2122/6662en
dc.description.abstractNitric acid (HNO3) is a major player in processes controlling the springtime depletion of polar ozone. It is the main constituent of the Polar Stratospheric Clouds (PSCs) and a primary reservoir for reactive nitrogen. Potential variations in the stratospheric circulation and temperature may alter the extent and duration of PSCs activity, influencing the future ozone levels significantly. Monitoring HNO3 and its long-term variability, especially in polar region, is then crucial for better understanding issues related to ozone decline and expected recovery. In this study we present an intercomparison between ground based HNO3 measurements, carried out by means of the Ground-Based Millimeter-wave Spectrometer (GBMS), and two satellite data sets produced by the two NASA/JPL Microwave Limb Sounder (MLS) experiments. In particular, we compare UARS MLS measurements (1991-1999) with those carried out by the GBMS at South Pole, Antarctica (90°S), Fall of 1993 and 1995. A similar intercomparison is made between Aura MLS HNO3 observations (2004 - to date) and GBMS measurements obtained during the period February 2004 - March 2007, at the mid-latitudes/high altitudes station of Testa Grigia (45.9° N, 7.7° E, elev. 3500 m), and during polar winters 2008/09 and 2009/2010 at Thule Air Base (76.5°N 68.8°W), Greenland. We assess systematic differences between GBMS and both UARS and Aura HNO3 data sets at seven potential temperature levels (θ) spanning the range 465 – 960 K. The UARS data set advected to the South Pole shows a low bias, within 20% for all θ levels but the 960 K, with respect to GBMS measurements. A very good agreement, within 5%, is obtained between Aura and GBMS observations at Testa Grigia, while larger differences, possibly due to latitude dependent effects, are observed over Thule. These differences are under further investigations but a preliminary comparison over Thule among MLS v3, GBMS, and ACE-FTS measurements suggests that GBMS measurements carried out during winter 2009 might not be reliable. These comparisons have been performed in the framework of the NASA JPL GOZCARDS project, which is aimed at developing a long-term, global data record of the relevant stratospheric constituents in the context of ozone decline. GBMS has been selected in GOZCARDS since its HNO3 dataset, although sampling different latitudes in different years, is the only one spanning a sufficiently long time interval for cross-calibrating HNO3 measurements by the UARS and Aura MLS experiments.en
dc.language.isoEnglishen
dc.relation.ispartofEOS Aura Science Team Meetingen
dc.subjectmillimeter wave spectroscopyen
dc.subjectstratospheric HNO3en
dc.subjectSatellite validationen
dc.titleCross-calibration of UARS and Aura MLS HNO3 data sets by means of ground-based millimeter-wave Observationsen
dc.typePoster sessionen
dc.description.statusUnpublisheden
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.01. Composition and Structureen
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.04. Processes and Dynamicsen
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniquesen
dc.description.ConferenceLocationBoulder, CO USAen
dc.relation.referencesde Zafra, R. L., V. Chan, S. Crewell, C. Trimble, and J. M. Reeves, Millimeter wave spectroscopic measurements over the South Pole, 3, The behavior of stratospheric nitric acid through polar fall, winter, and spring, J. Geophys. Res., 102, 1399– 1410, 1997. Livesey, N. J., et al., The UARS Microwave Limb Sounder version 5 data set: Theory, characterization, and validation, J. Geophys. Res., 107, doi:10.1029/2002JD002273, in press, 2002. Muscari, G., M. L. Santee, and R. L. de Zafra, Intercomparison of stratospheric HNO3 measurements over Antarctica: Ground-based millimeter-wave versus UARS/MLS Version 5 retrievals, J. Geophys. Res., 107(D24), 4809, doi:10.1029/ 2002JD002546, 2002. Santee, M. L., A. Lambert, W. G. Read, N. J. Livesey, R. E. Cofield, D. T. Cuddy, W. H. Daffer, B. J. Drouin, L. Froidevaux, R. A. Fuller, R. F. Jarnot, B. W. Knosp, G. L. Manney, V. S. Perun, W. V. Snyder, P. C. Stek, R. P. Thurstans, P. A. Wagner, J. W. Waters, G. Muscari, R. L. de Zafra, J. E. Dibb, D. W. Fahey, P. J. Popp, T. P. Marcy, K. W. Jucks, G. C. Toon, R. A. Stachnik, P. F. Bernath, C. D. Boone, K. A. Walker, J. Urban, and D. Murtagh, Validation of the Aura Microwave Limb Sounder HNO3 Measurements, J. Geophys. Res., 112, D24S40, doi:10.1029/2007JD008721, 2007en
dc.description.obiettivoSpecifico1.7. Osservazioni di alta e media atmosferaen
dc.description.obiettivoSpecifico1.10. TTC - Telerilevamentoen
dc.description.fulltextrestricteden
dc.contributor.authorFiorucci, I.en
dc.contributor.authorMuscari, G.en
dc.contributor.authorFroidevaux, L.en
dc.contributor.authorSantee, M. L.en
dc.contributor.authorDe Zafra, R. L.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAen
dc.contributor.departmentJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAen
dc.contributor.departmentState University of New York, Stony Brook, NY, USAen
item.openairetypePoster session-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptJet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA-
crisitem.author.deptJPL, California Institute of Technology, Pasadena, USA-
crisitem.author.deptDepartment of Physics and Astronomy, and Institute for Terrestrial and Planetary Atmospheres, State University of New York, Stony Brook, U.S.A.-
crisitem.author.orcid0000-0001-6326-2612-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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