Study on inference of particle composition of the Polar Storatospheric Clouds observed with satellite sensors

2002 Fiscal Year Final Research Report Summary

• Project/Area Number: 13640438
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Nara Women's University
• Principal Investigator: HAYASHIDA Sachiko Nara Women's University, Fuculty of Science, Professor, 理学部, 教授 (70180982)
• Project Period (FY): 2001 – 2002
• Keywords: Atomospheric Science / Polar Stratospheric Clouds / Stratospheric Aerosol / Stratospheric Ozone

Research Abstract

The Improved Limb Atmospheric Spectrometer (ILAS) captured many Polar Stratospheric Cloud (PSC) events in the Northern Hemisphere during the winter and early spring of 1997. The ILAS aerosol extinction coefficient and nitric acid data were compared with the theoretically predicted values for supercooled ternary solution (STS), nitric acid dihydrate (NAD) and nitric acid trihydrate (NAT) particles at equilibrium to infer the chemical composition of the observed PSC particles. The observations showed that in 1997, nitric acid-containing solid and liquid PSCs formed over the Arctic during winter and early spring, until mid-March. Some typical STS PSCs were found in mid-January, though some of the events seemed to involve ice particles. Most of the PSCs observed late in the PSC season had features of nitric acid-containing hydrates. An intensive analysis of the temperature histories suggested that most of the STS particles observed in January had experienced the thermal conditions necessary for the formation of liquid particles.

Research Products

• [Publications] S.Hayashida, M.Horikawa: "Anti-correlation between the extinction and the Angstrom parameter of the stratospheric aerosol based on the multiple wavelength measurements with SAGE II -as a characteristic of the decay period following major volcanic eruptions -"Geophysical Research Letters. Vol.28, No.21. 4063-4066 (2001)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] M.Saitoh, S.Hayashida, Y.Sasano, L.L.Pan: "Characteristic of Arctic polar stratspheric clouds in the winter of 1996/1997 inferred from ILAS measurements"Journal of Geophysical Research. Vol.107, No.24. ILS2-1-ILS2-14 (2002)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Pan, L.L., W.J.Randel, H.Nakajima, S.T.Massie, H.Kanzawa, Y.Sasano, T.Yokota, T.Sugita, S.Hayashida, S.Oshchepkov: "Satellite Observation of Dehydration in the Arctic Polar Stratsphere"Geophysical Research Letters. Vol.29, No.8. 25-1-25-4 (2002)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] S.Hayashida and M.Horikawa: "Anti-correlation between the extinction and the Angstrom parameter of the stratospheric aerosol based on the multiple wavelength measurements with SAGE II -as a characteristic of the decay period following major volcanic eruptions-"Geophysical Research Letters. Vol.28, No.21. 4063-4066 (2001)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] N.Sitoh, S.Hayashida, Y.Sasano, and L.L.Pan: "Characteristics of Arctic polar stratospheric clouds in the winter of 1996/1997 inferred from ILAS measurements"Journal of Geophysical Research. Vol.107, No.2. ILS 2-1-ILS 2-14 (2002)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Pan, L.L., W.J.Randel, H.Nakajima, S.T.Massie, H.Kanzawa, Y.Sasano, T.Yokota, T.Sugita, S.Hayashida, S.Oshchepkov: "Satellite Observation of Dehydration in the Arctic Polar Stratosphere"Geophysical Research Letters. Vol.29, No.8. 25-1-25-4 (2002)
  • Description: 「研究成果報告書概要(欧文)」より