Japan Geoscience Union Meeting 2015

Presentation information

International Session (Oral)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG09] Satellite Earth Environment Observation

Wed. May 27, 2015 11:00 AM - 12:45 PM 301B (3F)

Convener:*Riko Oki(Japan Aerospace Exploration Agency), Tadahiro Hayasaka(Graduate School of Science, Tohoku University), Kaoru Sato(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Masaki Satoh(Atmosphere and Ocean Research Institute, The University of Tokyo), Nobuhiro Takahashi(National Institute of Information and Communications Technology), Yoshiaki HONDA(Center for Environmental Remote Sensing, Chiba University), Kenlo Nasahara(Faculty of Life and Environmental Sciences, University of Tsukuba), Takashi Nakajima(Tokai University, School of Information Science & Technology, Dept. of Human & Information Science), Taikan Oki(Institute of Industrial Science, The University of Tokyo), Tatsuya Yokota(National Institute for Environmental Studies), Yukari Takayabu(Atmosphere and Ocean Research Institute, the University of Tokyo), Hiroshi Murakami(Earth Observation Research Center, Japan Aerospace Exploration Agency), Hajime Okamoto(Kyushu University), Chair:Misako Kachi(Earth Observation Research Center, Japan Aerospace Exploration Agency)

12:00 PM - 12:15 PM

[ACG09-11] A plan of an Earth observation satellite for the middle atmosphere dynamics and chemistry

*Masato SHIOTANI1, Makoto SUZUKI2, Takuki SANO2, Takashi KOIDE2, Masahiro TAKAYANAGI2, Koji IMAI2, Naohiro MANAGO3, Takatoshi SAKAZAKI1, Yoshinori UZAWA4, Satoshi OCHIAI4, Minoru KUBOTA4, Yasunori FUJII5 (1.Research Institute for Sustainable Humanosphere, Kyoto University, 2.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3.Center for Environmental Remote Sensing, Chiba University, 4.National Institute of Information and Communications Technology, 5.National Astronomical Observatory of Japa)

Keywords:satelllte observation, middle atmosphere

The Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) aboard the Japanese Experiment Module (JEM) of the International Space Station (ISS) made atmospheric measurements of minor species in the stratosphere and mesosphere for about six months from October 2009 to April 2010 (Kikuchi et al., 2010). The unprecedented high sensitivity measurements using the 4-K cooled submillimeter limb sounder provided new insights into the physics and chemistry of the middle atmosphere such as the diurnal variation in stratospheric ozone (Imai et al., 2013; Sakazaki et al., 2013).

On the basis of the technology employed for SMILES, we propose a plan of an Earth observation satellite for the middle atmosphere dynamics and chemistry. Particular emphasis is placed on high sensitivity temperature measurement that was not implemented in SMILES and wind field measurement that was demonstrated by SMILES (Baron et al., 2013). We expect the mission life time for about 3 years to provide global data promoting sciences in the middle atmosphere and the lower thermosphere. Those measurements are essential to constrain advanced chemical transport models for future projection of the ozone layer.

Scientific targets using the data are as follows: 1) Clarification of heat budget and momentum budget in the middle atmosphere on the basis of high precision temperature measurements with accuracy ~ 1K up to 100km. Wind fields should be also derived by Doppler shift of spectral lines at least for line-of-sight. Data assimilation can be used to derive the horizontal wind filed. Characteristics of atmospheric tides in the mesosphere can be clarified. 2) Transport processes of tropospheric air into the stratosphere based on high accuracy observations of ClO and BrO that are important to ozone budget. Measurements of tracers such as H2O and N2O are also performed for quantitative argument of the meridional circulation. 3) Effects of solar activity on the upper atmosphere. Solar proton events in addition to periodic variations associated with the solar activity can be captured.

Baron et al. (2013), Atmos. Chem. Phys., 13, 6049-6064, doi:10.5194/acp-13-6049-2013.
Imai et al. (2013), J. Geophys. Res. Atmos., 118, 5750-5769, doi:10.1002/jgrd.50434.
Kikuchi et al. (2010), J. Geophys. Atmos. Res., 115, D23306, doi:10.1029/2010JD014379.
Sakazaki et al., (2013), J. Geophys. Res. Atmos., 118, 2991-3006, doi:10.1002/jgrd.50220.