Study on the dehydration in the Tropical Tropopause Layer by observations of minor constituents and analyses of 4-D assimilation field

2012 Fiscal Year Final Research Report

• Project/Area Number: 21244072
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Hokkaido University
• Principal Investigator: HASEBE Fumio 北海道大学, 大学院・地球環境科学研究院, 教授 (00261735)
• Co-Investigator(Kenkyū-buntansha): SHIOTANI Masato 京都大学, 生存圏研究所, 教授 (50192604) ; FUJIWARA Masatomo 北海道大学, 大学院・地球環境科学研究院, 准教授 (00360941) ; NISHI Noriyuki 京都大学, 大学院・理学研究科, 助教 (00222183) ; OGINO Shinya 独立行政法人海洋研究開発機構, 地球環境変動領域, 研究員 (80324937) ; MIYAZAKI Kazuyuki 独立行政法人海洋研究開発機構, 地球環境変動領域, 研究員 (30435838) ; SHIBATA Takashi 名古屋大学, 大学院・環境学研究科, 教授 (70167443) ; YAMAZAKI Koji 北海道大学, 大学院・地球環境科学研究院, 教授 (70270791) ; IWASAKI Toshiki 東北大学, 大学院・理学研究科, 教授 (80302074)
• Project Period (FY): 2009 – 2012
• Keywords: 地球環境システム / 成層圏組成変動 / 熱帯対流圏界層 / 脱水過程 / ゾンデ観測 / 過飽和度 / 同化場解析

Research Abstract

The long-term trend of the water concentration in the tropical stratosphere has been estimated from in situ observations by radiosondes.Supersaturations close to 80 % in relative humidity with respect to ice have been observed in cirrus clouds advected horizontally in the Tropical Tropopause Layer (TTL). General features of dehydration associated with horizontal advection for the air parcels slowly ascending in the TTL have been observationally described for the first time by investigating the water mixing ratio of the observed air parcels and their minimum saturation mixing ratio estimated along the trajectories upstream.

Research Products

• [Journal Article] Correction of the stepwise change observed at 0℃ in Meisei RS2-91, RS-01G, and RS-06G radiosonde relative humidity profiles (2013)
  • Author(s): Sugidachi, T., and M. Fujiwara
  • Journal Title: J.Meteor. Soc
  • Peer Reviewed
• [Journal Article] Ozone variations over the northern subtropical region revealed by ozonesonde observations in Hanoi (2013)
  • Author(s): Ogino, S.-Y., M. Fujiwara, M. Shiotani,F. Hasebe, J. Matsumoto, Thuy Ha T. Hoang,and Tan Thanh T. Nguyen
  • Journal Title: J. Geophys. Res. Volume: 118 Pages: 3245-3257
  • DOI: doi:10.1002/jgrd.50348.
  • Peer Reviewed
• [Journal Article] Cold Trap Dehydration in the Tropical Tropopause Layer Characterised by SOWER Chilled-Mirror Hygrometer Network Data in the Tropical Pacific (2013)
  • Author(s): Hasebe, F., Y. Inai, M. Shiotani, M.Fujiwara, H. Vomel, N. Nishi, S.-Y. Ogino,T. Shibata, S. Iwasaki, N. Komala, T. Peter,and S. J. Oltmans
  • Journal Title: Atmos. Chem. Phys. Volume: 13 Pages: 4393-4411
  • DOI: doi:10.5194/acp-13-4393-2013
  • Peer Reviewed
• [Journal Article] Dehydration in the tropical tropopause layer estimated from the water vapor match (2013)
  • Author(s): Inai, Y., F. Hasebe, M. Fujiwara, M.Shiotani, N. Nishi, S.-Y. Ogino, H. Vomel,S. Iwasaki, and T. Shibata
  • Journal Title: Atmos. Chem. Phys. Discuss. Volume: 13 Pages: 633-688
  • DOI: doi:10.5194/acpd-13-633-2013.
• [Journal Article] High supersaturation inside cirrus in well-developed tropical tropopause layer over Indonesia (2012)
  • Author(s): Inai, Y., T. Shibata, M. Fujiwara, F.Hasebe, and H. Vomel
  • Journal Title: Geophys. Res. Lett. Volume: 39 Pages: L20811
  • DOI: doi:10.1029/2012GL053638.
  • Peer Reviewed
• [Journal Article] Analysis of the tropical tropopause layer using the Nonhydrostatic Icosahedral Atmospheric Model (NICAM): 2. An experiment under the atmospheric conditions of December 2006 to January 2007 (2012)
  • Author(s): Kubokawa, H., M. Fujiwara, T. Nasuno, M.Miura, M. K. Yamamoto, and M. Satoh
  • Journal Title: J. Geophys. Res. Volume: 117 Pages: D17114
  • DOI: doi:10.1029/2012JD017737.
  • Peer Reviewed
• [Journal Article] Mixtures of stratospheric and overshooting air measured using A-Train sensors (2012)
  • Author(s): Iwasaki, S., T. Shibata H. Okamoto, H.Ishimoto, and H. Kubota
  • Journal Title: J. Geophys.Res. Volume: 117 Pages: D12207
  • DOI: doi:10.1029/2011JD017402.
  • Peer Reviewed
• [Journal Article] Cirrus cloud appearance in a volcanic aerosol layer around the tropical cold point tropopause over Biak, Indonesia, in January 2011 (2012)
  • Author(s): Shibata, T., M. Hayashi, A. Naganuma, N.Hara, K. Hara, F. Hasebe, K. Shimizu, N.Komala, Y. Inai, H. Vomel, S. Hamdi, S.Iwasaki, M. Fujiwara, M. Shiotani, S.-Y.Ogino, and N. Nishi
  • Journal Title: J.Geophys. Res. Volume: 117 Pages: D11209
  • DOI: doi:10.1029/2011JD017029.
  • Peer Reviewed
• [Journal Article] Seasonal and interannual variability in the temperature structure around the tropical tropopause and its relationship with convective activities (2012)
  • Author(s): Nishimoto, E., and M. Shiotani
  • Journal Title: J. Geophys.Res. Volume: 117 Pages: D11209
  • DOI: doi:10.1029/2011JD016936
  • Peer Reviewed
• [Journal Article] Water Vapor and Ozone Variations in the Tropical Tropopause Layer during the Central Equatorial Pacific Experiment Campaign (2012)
  • Author(s): Koishi, K., and M. Shiotani
  • Journal Title: J.Meteor. Soc. Japan Volume: 90 Pages: 403-416
  • DOI: doi:10.2151/jmsj.2012-304.
  • Peer Reviewed
• [Journal Article] Simultaneous assimilation of satellite NO_2,O_3, CO, and HNO_3 data for the analysis of tropospheric chemical composition and emissions (2012)
  • Author(s): Miyazaki, K., H. J. Eskes, K. Sudo, M.Takigawa, M. van Weele, and K. F. Boersma
  • Journal Title: Atmos. Chem.Phys. Volume: 12 Pages: 9545-9579
  • DOI: doi:10.5194/acp-12-9545-2012.
  • Peer Reviewed
• [Journal Article] Assessing the impact of satellite, aircraft, and surface observations on CO_2 flux estimation using an ensemble-based 4D data assimilation system (2011)
  • Author(s): Miyazaki, K., T. Maki, P. K. Patra, and T. Nakazawa
  • Journal Title: J. Geophys. Res. Volume: 116 Pages: D16306
  • DOI: doi:10.1029/2010JD015366.
  • Peer Reviewed
• [Journal Article] Seasonal to decadal variations of water vapor in the tropical lower stratosphere observed with balloon-borne cryogenic frostpoint hygrometers (2010)
  • Author(s): Fujiwara, M., H. Vomel, F. Hasebe, M.Shiotani, S.-Y. Ogino, S. Iwasaki, N. Nishi,T. Shibata, K. Shimizu, E. Nishimoto, J. M.Valverde-Canossa, H. B. Selkirk, and S. J.Oltmans
  • Journal Title: J. Geophys. Res. Volume: 115 Pages: D18304
  • DOI: doi:10.1029/2010JD014179.
  • Peer Reviewed
• [Journal Article] Lifetime and longitudina variability of equatorial Kelvin waves around the tropical tropopause region (2010)
  • Author(s): Suzuki, J., M. Shiotani, and N. Nishi
  • Journal Title: J.Geophys. Res. Volume: 115 Pages: D03103
  • DOI: doi:10.1029/2009JD012261.
  • Peer Reviewed
• [Journal Article] Development of a Cloud-Top Height Estimation Method by Geostationary Satellite Split-Window Measurements Trained with CloudSat Data (2010)
  • Author(s): Hamada, A., and N. Nishi
  • Journal Title: J. Appl. Meteor.Climatol. Volume: 49 Pages: 2035-2049
  • DOI: DOI:10.1175/2010JAMC2287.1
  • Peer Reviewed
• [Journal Article] Cloud-top height variability associated with equatorial Kelvin waves in the tropical tropopause layer during the Mirai Indian Ocean cruise for the study of the MJO-convection onset (MISMO) campaign (2010)
  • Author(s): Suzuki, J., M. Fujiwara, A. Hamada, Y.Inai, J. Yamaguchi, R. Shirooka, F. Hasebe,and T. Takano
  • Journal Title: SOLA Volume: 6 Pages: 97-100
  • DOI: doi:10.2151/sola.2010-025.
  • Peer Reviewed
• [Journal Article] Post-Pinatubo Evolution and Subsequent Trend of the Stratospheric Aerosol Layer Observed by Mid-Latitude Lidars in Both Hemispheres (2010)
  • Author(s): Nagai, T., B. Liley, T. Sakai, T.Shibata, and O. Uchino
  • Journal Title: SOLA Volume: 6 Pages: 69-72
  • DOI: doi:10.2151/sola.2010-018.
  • Peer Reviewed
• [Journal Article] Performance of a local ensemble transform Kalman filter for the analysis of atmospheric circulation and distribution of long-lived tracers under idealized conditions (2009)
  • Author(s): Miyazaki, K.
  • Journal Title: J. Geophys.Res. Volume: 114 Pages: D19304
  • DOI: doi:10.1029/2009JD011892.
  • Peer Reviewed
• [Journal Article] Cirrus observations in the tropical tropopause layer over the western Pacific (2009)
  • Author(s): Fujiwara, M., S. Iwasaki, A. Shimizu, Y.Inai, M. Shiotani, F. Hasebe, I. Matsui, N.Sugimoto, H. Okamoto, N. Nishi, A. Hamada,T. Sakazaki, and K. Yoneyama
  • Journal Title: J. Geophys.Res. Volume: 114 Pages: D09304
  • DOI: doi:10.1029/2008JD011040.
  • Peer Reviewed
• [Journal Article] Correction of radiosonde pressure and temperature measurements using simultaneous GPS height data (2009)
  • Author(s): Inai, Y., F. Hasebe, K. Shimizu, and M.Fujiwara
  • Journal Title: SOLA Volume: 5 Pages: 109-112
  • DOI: doi:10.2151/sola.2009-028.
  • Peer Reviewed
• [Presentation] Critical Outstanding TTL Questions: Ground Based Observations (2012)
  • Author(s): Hasebe, F., and T. Shibata
  • Organizer: A U.S.-Japan Workshop on the Tropical Tropopause Layer: State of Current Science and Future Observational Needs
  • Place of Presentation: University of Hawaii (USA)
  • Year and Date: 20121015-19
• [Presentation] 白鳳丸熱帯東部太平洋気球観測によるTTL上端大気のage推定 (2012)
  • Author(s): 稲飯洋一,青木周司,本田秀之,菅原敏,森本真司,長谷部文雄,植松光夫
  • Organizer: 日本気象学会2012年秋季大会
  • Place of Presentation: 北海道大学(札幌市)
  • Year and Date: 20121003-05
• [Presentation] H.T.T.Ha,N.T.Tan Thanh,ハノイのオゾンゾンデ観測に基づく北半球亜熱帯域におけるオゾン変動 (2012)
  • Author(s): 荻野慎也,藤原正智,塩谷雅人,長谷部文雄,松本淳
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
  • Year and Date: 20120520-25
• [Presentation] Analysis of tropical cloud systems using a new cloud-top height data by geostationary satellite splitwindow measurements trained with CloudSat data (2011)
  • Author(s): Nishi N., A. Hamada, M. Ohigawa, and S. Shige
  • Organizer: AGU Fall Meeting
  • Place of Presentation: Moscone Convention Center (San Francisoco, USA)
  • Year and Date: 2011-12-06
• [Presentation] SOWER (Soundings of Ozone and Water in the Equatorial Region): Variability of temperature structure around the tropical tropopause (2011)
  • Author(s): Shiotani, M., and E. Nishimoto
  • Organizer: WCRP Open Science Conference
  • Place of Presentation: Sheraton Denver DowntownHotel (Denver, USA)
  • Year and Date: 2011-10-25
• [Presentation] SOWER (Soundings of Ozone and Water in the Equatorial Region): Dehydration in the TTL estimated from the water vapor match (2011)
  • Author(s): M.Shiotani, N. Nishi, S.-Y. Ogino, H. Vomel,T. Shibata, and S. Iwasaki
  • Organizer: WCRP Open Science Conference
  • Place of Presentation: Sheraton Denver Downtown Hotel (Denver,USA)
  • Year and Date: 2011-10-25
• [Presentation] SOWER (Soundings of Ozone and Water in the Equatorial Region):Application of Data Assimilation to the Study of TTL Dehydration (2011)
  • Author(s): Hasebe, F., Y. Domon, K. Miyazaki, and Y. Inai
  • Organizer: WCRP Open Science Conference
  • Place of Presentation: Sheraton Denver Downtown Hotel (Denver, USA)
  • Year and Date: 2011-10-25
• [Presentation] Recent developments in chemical data assimilation for atmospheric gases and aerosols in Japan (2011)
  • Author(s): Miyazaki, K., T. Sekiyama, T.Nakamura,M. Deushi, T. Maki, C.Kobayashi, H.Akiyoshi, K. Shibata, Y. Yokoo, M. Sawada,T. Nakazawa, S. Aoki, and T. Iwasaki
  • Organizer: The 8th SPARC Data Assimilation workshop
  • Place of Presentation: Belgian Federal Science Policy Office(Brussels, Belgium)
  • Year and Date: 2011-06-21
• [Presentation] 熱帯対流圏界面を通した物質交換 (2010)
  • Author(s): 長谷部文雄
  • Organizer: 日本気象学会2010年秋季大会(招待講演)
  • Place of Presentation: 京都テルサ
  • Year and Date: 2010-10-28
• [Presentation] Recent results from SOWER activities in the tropical Pacific (2009)
  • Author(s): Hasebe, F., M. Shiotani, M. Fujiwara, H.Vomel, N. Nishi, S.-Y. Ogino, T. Shibata,S. Iwasaki, H. Takashima, Y. Inai, K.Shimizu, K. Miyazaki, K. Yamazaki, T.Iwasaki, and S. Oltmans
  • Organizer: IGAC-SPARC Joint Workshop
  • Place of Presentation: 京都大学芝蘭会館
  • Year and Date: 20091025-26
• [Presentation] Simultaneous observations of humidity by CU-CFH and cirrus clouds by lidar in upper troposphere over Indonesia (2009)
  • Author(s): Shibata, T.
  • Organizer: IGAC-SPARC Joint Workshop
  • Place of Presentation: 京都大学芝蘭会館
  • Year and Date: 20091025-26
• [Presentation] Seasonal to decadal variations of water vapor in the tropical lower stratosphere observed with balloon-borne frost-point hygrometers (2009)
  • Author(s): Fujiwara, M., F. Hasebe, M. Shiotani, H.Vomel, S.-Y. Ogino, S. Iwasaki, N. Nishi,T. Shibata, K. Shimizu, E. Nishimoto,J.Valverde-Canossa, H. B. Selkirk, and S.J. Oltmans
  • Organizer: IGAC-SPARC Join Workshop
  • Place of Presentation: 京都大学芝蘭会館
  • Year and Date: 20091025-26
• [Presentation] データ同化を利用した流跡線計算高精度化の試み (2009)
  • Author(s): 土門優介,宮崎和幸,稲飯洋一,長谷部文雄
  • Organizer: 日本気象学会2009年春季大会
  • Place of Presentation: つくば国際会議場(茨城県)
  • Year and Date: 20090528-30
• [Remarks]
  • URL: http://sower.ees.hokudai.ac.jp/
• [Remarks]
  • URL: http://wwwoa.ees.hokudai.ac.jp/~f-hasebe/SOWER/