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| Titel |
An intercomparison study of isotopic ozone profiles from the ACE-FTS and JEM-SMILES instruments. |
| VerfasserIn |
Ashley Jones, Kaley A. Walker, Makoto Suzuki, Yasko Kasai, Masato Shiotani, Chris Boone, Peter Bernath, Gloria Manney, Xing Shuo Zhai |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250051751
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| Zusammenfassung |
| Observations of various atmospheric isotopologue species are a valuable source of
information, as they can improve our current understanding of the atmosphere. For example,
isotopic signatures in atmospheric profiles can be used to investigate atmospheric dynamical
processes, while differences in the isotopic composition of atmospheric trace gases can be
traced to effects due to their sources and sinks. This study focuses on the intercomparison of
two satellite missions that provide measurements of isotopic species. Firstly, the Atmospheric
Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS) aboard the Canadian
satellite SCISAT (launched in August 2003) was designed to investigate the composition of
the upper troposphere, stratosphere, and mesosphere. ACE-FTS utilises solar occultation to
measure temperature and pressure as well as vertical profiles of over thirty different
chemical species and isotopologue profiles for; O3,H2O, CH4, N2O, CO, CO2 and
NO. Global coverage for each species is obtained approximately over one year
and with a vertical resolution of typically 3-4 km. Secondly, the Superconducting
Sub-Millimeter-wave Limb Emission Sounder (SMILES), onboard the Japanese Experiment
Module (JEM) of the International Space Station (ISS) was launched in September
2009 to investigate the middle atmosphere. It is the first space-borne application of
superconductor–insulator–superconductor (SIS) heterodyne detector technology. From limb
emission measurements, the JEM-SMILES instrument provides vertical profiles of
isotopologues of O3 with a vertical resolution of typically 2.1-3.7 km. Here, we
present differences between collocated O3 isotopologue profiles measured by each
instrument, where coincidences are selected by using specific time and distance criteria.
Coincidences found during polar winters are filtered with an additional criterion based
on scaled potential vorticity values derived from the GEOS-5 analyses, which are
interpolated to the time and location of each ACE-FTS and JEM-SMILES profile. |
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