TY  - JOUR
AU  - Khosrawi, F.
AU  - Proffitt, M. H.
AU  - Müller, R.
AU  - Urban, J.
AU  - Murtagh, D.
AU  - Nakajima, H.
TI  - The seasonal cycle of averages of nitrous oxide and ozone in the Northern and Southern Hemisphere polar, midlatitude, and tropical regions derived from ILAS/ILAS-II and Odin/SMR
JO  - Journal of Geophysical Research
VL  - 113
SN  - 0148-0227
CY  - Washington, DC
PB  - Union
M1  - PreJuSER-59936
SP  - D18305
PY  - 2008
N1  - The Improved Limb Atmospheric Spectrometer (ILAS and ILAS-II) were developed by the Ministry of the Environment of Japan. The ILAS and ILAS-II data were processed at the ILAS/ILAS-II Data Handling Facility, National Institute of Environmental Studies (NIES), Japan. A part of this work was supported by the Global Environment Research Fund provided by the Ministry of the Environment of Japan (MOE). We are grateful to P. Ricaud and J. de La Noe of the Observatoire de Bordeaux and to C. Boone of the Service d'Aeronomie, Paris, for their kind assistance in providing Odin/SMR data through the French atmospheric database ETHER (http://ether.ipsl.jussieu.fr/). Odin is a Swedish-led satellite project funded jointly by Sweden (SNSB), Canada (CSA), Finland (TEKES), and France (CNES). We are also grateful to the anonymous referees for their helpful comments, to M. von Hobe and K. Waigel for programming support, and to the European Commission for funding F. Khosrawi by the EU 6th Framework Programme-Marie-Curie Intra-European Fellowships.
AB  - Northern and Southern Hemispheric monthly averages of ozone (O-3) and nitrous oxide (N2O) have been suggested as a tool for evaluating atmospheric photochemical models. An adequate data set for such an evaluation can be derived from measurements made by satellites which, in general, have a high spatial and temporal coverage. Here, we use measurements made by the Improved Limb Atmospheric Spectrometers (ILAS and ILAS-II) which use the solar occultation technique and by the Odin-Sub-Millimetre Radiometer (Odin/SMR) which passively observes thermal emissions from the Earth's limb. From ILAS/ILAS-II and Odin/SMR observations, 1-year data sets of monthly averaged O-3 and N2O, covering a full seasonal cycle, were derived for the latitude range between 60 - 90 degrees N and 60 - 90 degrees S, respectively, by partitioning the data into equal bins of altitude or potential temperature. A comparison between both data sets in this latitude region shows a good agreement and verifies that limited sampling from satellite occultation experiments does not constitute a problem for deriving such a full seasonal cycle of monthly averaged N2O and O-3. Since Odin/SMR provides measurements globally, a 1-year data set of monthly averaged N2O and O-3 is reported here for both the entire Northern and Southern Hemispheres from these measurements. Further, these hemispheric data sets from Odin/SMR are separated into data sets of monthly averaged N2O and O-3 for the low latitudes, midlatitudes, and high latitudes. The resulting families of curves help to differentiate between O-3 changes due to photochemistry from those due to transport. These 1-year hemispheric data sets of monthly averaged N2O and O-3 from Odin/SMR and ILAS/ILAS-II as well as the data sets of monthly averaged N2O and O-3 for the specific latitude regions from Odin/SMR provide a potentially important tool for the evaluation of atmospheric photochemical models. An example of how such an evaluation can be performed is given using data from two chemical transport models (CTMs), the Chemical Lagrangian Model of the Stratosphere (CLaMS) and the Karlsruhe Simulation Model of the Middle Atmosphere (KASIMA). We find a good agreement between Odin/SMR and the CTMs CLaMS and KASIMA with differences generally less than +/- 20%.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000259396500001
DO  - DOI:10.1029/2007JD009556
UR  - https://juser.fz-juelich.de/record/59936
ER  -