place: Room851 理学部1号館
time: 2007年11月7日(水)、5:00 to 7:00 pm
論文講読
title: 下記の論文を各自一報、30分でまとめる
abstract:
1.M. Gounelle, The origin of short-lived radio nuclides in the solar system, New astronomy reviews, 50, 2006, 596-599.
2. R.E. Rothchild et al., The challenge to understanding 26Al emission from OB associations, New astronomy Reviews, 50, 2006, 477-480.
3. R.Diehl, Measuring 26Al and 60Fe in the Galaxy, New astronomy reviews, 50, 2006, 534-539.
4. M.Limongi and A.Chieffi, Nucleosynthesis of 60Fe in massive stars, New Astronomy reviews, 50, 2006, 474-476.
place: Room851 理学部1号館
time: 2007年11月21日(水)、5:00 to 7:00 pm
speaker: Dr.Yasuko Kasai
(*National Institute of Information and Communications Technology)
title: Odin/SMR Satellite Observations of Ozone and its Isotopes in the Middle Atmosphere
abstract:
The global distribution of isotopic composition of atmospheric ozone has been studied by SubMillimeter Radiometer (SMR) onboard the Odin satellite with retrievals being performed by the Optimal Estimation Method.
Odin/SMR launched in February 2001, employs 4 tunable single-sideband Schottky-diode heterodyne receivers in the 485-580GHz spectral range. Vertical profiles for the main isotopomer (16O16O16O) as well as the profiles of the minor isotopomers (16O16O18O, 16O18O16O) were then retrieved for day and night. Results are compared to previous ground-based FTIR, balloon-born FIR,and space-born measurements of isotopic enrichments in atmospheric ozone and found to have smaller uncertainties in the mid-latitude region. The results should therefore provide useful data for validating proposed mechanisms for the isotopic enrichments in atmospheric ozone in the middle atmosphere.