Diurnal variations in sea surface temperature and precipitable water observed over the tropical Ocean

• Project/Area Number: 21740347
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: YASUNAGA Kazuaki Japan Agency for Marine-Earth Science and Technology, 地球環境変動領域, 研究員 (50421889)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 大気海洋相互作用 / 熱帯気象 / 日周期

Research Abstract

The relationships between large-scale motion and moisture variations are investigated. The results indicate that moisture variations show a prominent 3-4-day period, ant the 3-4-day-period variations are strongly modulated by the significant diurnal cycle of sea surface temperature. The 3-4-day period variations are observed during the developing phase of Madden-Julian oscillation (MJO) and might play a significant role in the MJO development.

Research Products

• [Journal Article] The influence of observations propagated by convectively coupled equatorial waves. (2011)
  • Author(s): Qoosaku M., K.Yoneyama, R.Shirooka, H.Kubota, K.Yasunaga, J.Suzuki, A.Seiki, N.Sato, T.Enomoto, T.Miyoshi, S.Yamane.
  • Journal Title: Quarterly Journal of the Royal Meteorological Society. 137 Pages: 642-655
  • Peer Reviewed
• [Journal Article] The influence of observations propagated by convectively coupled equatorial waves (2011)
  • Author(s): Moteki, Q
  • Journal Title: Quarterly Journal of the Royal Meteorological Society Volume: (in printing)
  • Peer Reviewed
• [Journal Article] Characteristics of 3-4-day and 6-8-day period disturbances observed over the tropical Indian Ocean. (2010)
  • Author(s): Yasunaga, K., K.Yoneyama, Q.Moteki, M.Fujita, Y.N.Takayabu, J.Suzuki, T.Ushiyama, B.Mapes.
  • Journal Title: Monthly Weather Review 138 Pages: 4158-4174
  • Peer Reviewed
• [Journal Article] Continual influences of tropical waves on the genesis and rapid intensification of Typhoon Durian (2006). (2010)
  • Author(s): Yanase, W., M.Satoh, H.Yamada, K.Yasunaga, Q.Moteki.
  • Journal Title: Geophysical Research Letters. 37
  • Peer Reviewed
• [Journal Article] Characteristics of 3-4-day and 6-8-day period disturbances observed over the tropical Indian Ocean (2010)
  • Author(s): Yasunaga, K.
  • Journal Title: Monthly Weather Review Volume: 138 Pages: 4158-4174
  • Peer Reviewed
• [Journal Article] Continual influences of tropical waves on the genesis and rapid intensification of Typhoon Durian (2006) (2010)
  • Author(s): Yanase, W.
  • Journal Title: Geophysical Research Letters Volume: 37
  • Peer Reviewed
• [Journal Article] Afternoon precipitation peak simulated in an aqua-planet global non-hydrostatic model (aqua-planet-NICAM). (2009)
  • Author(s): Yasunaga, K., T.Nasuno, H.Miura, Y.N.Takayabu, M.Yoshizaki.
  • Journal Title: Journal of Meteorological Society of Japan in printing
  • NAID: 130004435274
  • Peer Reviewed
• [Journal Article] Afternoon precipitation peak simulated in an aqua-planet global non-hydrostatic model (aqua-planet-NICAM)
  • Author(s): Yasunaga, K.
  • Journal Title: Journal of Meteorological Society of Japan (In printing)
  • NAID: 130004435274
  • Peer Reviewed
• [Presentation] Water vapor variations and equatorial waves over the Indian Ocean. (2009)
  • Author(s): Yasunaga, K.
  • Organizer: 熱帯気象研究会
  • Place of Presentation: 北海道大学
  • Year and Date: 2009-09-29
• [Presentation] Water vapor variations and equatorial waves over the Indian Ocean (2009)
  • Author(s): Yasunaga, K.
  • Organizer: 熱帯気象研究会
  • Place of Presentation: 北海道大学
  • Year and Date: 2009-09-29