Takeshi Kawano / Visiting Professor / Division of Environmental Studies
Department of Ocean Technology, Policy, and Environment / / Ocean General Circulation, Hydrographic Observation

Career Summary
1982-1986: Faculty of Engineering, The University of Tokyo (B.Eng.)
1986-1988: Postgraduate School of Engineering, The University of Tokyo (M.Eng.)
1988-2002: Research Scientist, Japan Marine Science and Technology Center, JAMSTEC
1996-1997: Senior Visiting Scientist, Dalhousie University
2002-2003: Manager of Marine Observation Section, Marine Works Japan, LTD.
2003: Doctor of Engineering, Tokai University
2003: Research Scientist, Ocean Observation Research Dept., JAMSTEC
2004-2008: Sub-leader, Ocean General Circulation Observational Research Program, Institute of Observational Research for Global Change (IORGC), JAMSTEC
2008-2009: Group-leader, General Circulation Dynamics Group, Ocean General Circulation Observational Research Program, IORGC, JAMSTEC
2009-present: Program Director, Ocean Climate Change Research Program, Research Institute for Global Change, JAMSTEC
2009-present: Affiliated Fellow, Science and Technology Foresight Center, National Institute of Science and Technology Policy
2009-present: Visiting Professor, Department of Ocean Technology, Policy, and Environment, School of Frontier Sciences, The University of Tokyo
Educational Activities
Graduate school: Special Lecture on Ocean Technology, Policy, and Environment II

Research Activities
Accurate measurement of salinity and its comparability:
Comparison of salinity distributions is an interesting and important subject in the investigation of the decadal change of freshwater transport. However, great attention should be paid to comparison of the salinity measurements during different cruises, especially in deep water, where salinity change is considered to be small. To minimize systematic errors in salinity data, a method to measure the salinity with the highest precision has been developed in this laboratory. Although IAPSO Standard Seawater (SSW) has been widely used to determine the practical salinity, there are inconsistencies among SSW batches. Therefore, we have made a table of the inconsistencies among the batches prepared in 1984 to the present and consider these inconsistencies in order to make a more reliable comparison.

Research on Ocean Climate Change:
Repeated land-to-land hydrographic observations along WOCE Hydrographic Program lines have been carried out by R/V Mirai to study the changes in ocean environment. As a result of analysis, we found that Lower Circumpolar Deep Water has warmed along its pathway in the entire Pacific during recent decades. The change in heat contents by this deep water warming is estimated to be 5% of the total change in heat contents and the warming also contributes to the rise of the sea level.

1) T. Kawano, T. Doi, H. Uchida, S. Kouketsu, M. Fukasawa, Y. Kawai, K. Katsumata: Heat content change in the Pacific Ocean between 1990s and 2000s, Deep-Sea Res. (accepted).
2) S. Kouketsu, M. Fukasawa, I. Kaneko, T. Kawano, H. Uchida, T. Doi, M. Aoyama, K. Murakami: Changes in water properties and transports along 24N in the North Pacific between 1985 and 2005, Journal of Geographical Research, 114, C01008, doi:10.1029/2008JC004778 (2009)
3) H. Uchida, T. Kawano, I. Kaneko, M. Fukasawa: In-situ calibration of optode-based oxygen sensors, Journal of Atmospheric and Oceanic Technology, 25, 2271-2281 (2008)
4) H. Uchida, T. Kawano, M. Fukasawa: In situ calibration of moored CTDs used for monitoring abyssal water, Journal of Atmospheric and Oceanic Technology, 25, 1695-1702 (2008)
5) W. Schneider, M. Fukasawa, J. Garces-Vargas, L. Bravo, H. Uchida, T. Kawano, R. Fuenzalida: Spin-up of South Pacific subtropical gyre freshens and cools the upper layer of the eastern South Pacific Ocean, Vol. 34, L24606, doi:10.1029/2007GL031933 (2007)
6) H. Uchida, H. Yamamoto, K. Ichikawa, I. Kaneko, M. Fukasawa, T. Kawano, Y. Kumamoto: Flow of abyssal water into Wake Island Passage: properties and transports from hydrographic surveys. Journal of Geophysical Research, 112, C04008, doi: 10.1029/2006JC004000 (2007)
7) T. Kawano, M. Fukasawa, S. Kouketsu, H. Uchida, T. Doi, I. Kaneko, M. Aoyama, W. Schneider: Bottom water warming along the pathway of lower circumpolar deep water in the North Pacific. Geophysical Research Letters, 33, L23613, doi:10.10292/2006GL027933 (2006)
8) T. Kawano, M. Aoyama, T. Joyce, H. Uchida, Y. Takatsuki, M. Fukasawa: The latest batch-to-batch difference table of standard seawater and its application to the WOCE onetime sections. Journal of Oceanography, 62, 777-792 (2006)
9) T. Kawano, M. Aoyama, Y. Takatsuki: Inconsistency in the conductivity of the standard potassium chloride solution made from the different high-quality reagents. Deep-Sea Research I, Vol. 52, 389-396 (2005)
Other Activities
Japan Society for Marine Surveys and Technology (Planning Board, Editorial Board)
The Oceanographic Society of Japan, Member
Japan Society of Naval Architecture and Ocean Engineering, Member
Advanced Marine Science and Technology Society, Member
American Geophisical Union, Member
Future Plan
Climate change is one of the most serious problems that we are now facing. A plan to adapt to and mitigate climate change is urgently required. Members of this research laboratory are expected to acquire precise knowledge of climate change, which is essential for making plans for adaptation and mitigation.

Messages to Students
Conduct study and research with the Earth always in your mind.