GEOTRACES Japan Cruise Status maintained by Japan Oceanographic Data Center. last updated on 31 Oct. 2017 |
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Ship Name |
R/V Hakuho-Maru |
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Responsible Organization |
Atmosphere and Ocean Research Institute, University of Tokyo (AORI, UT) Address: 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan |
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Cruise No. |
KH-12-04 |
Cruise Status |
Done |
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Departure |
23 August 2012 |
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Arrival |
3 October 2012 |
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Research Area |
North Pacific Ocean |
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Objectives |
A zonal transect was undertaken along ~47°N in the northern Pacific to investigate biogeochemical cycles of trace elements and isotopes (TEIs) as part of the international GEOTRACES program. The Japanese research vessel Hakuho Maru left Tokyo on August 23, 2012, and arrived at Vancouver (Canada) on October 3, 2012. A port call at Dutch Harbor (USA) was taken between 13 and 17 September during the cruise. Thirty three scientists and students, including two graduate students from Korea and Indonesia, participated the cruise. Although we aimed at establishing the 2-dimensional profiles of GEOTRACES TEIs fully along the GP-02 line in the northern North Pacific, most of the stations in the eastern half of the line were not occupied due to bad weather conditions (We have a cruise plan to cover the eastern half in 2017). We will extract much information on biogeochemical cycles of TEIs and their roles in marine ecosystems in the western half of the GP-02 line. We will obtain some radioisotope data associated with the accident at Fukushima nuclear power plant on March 11, 2011. In addition, we focused on hydrothermal plumes from Juan de Fuca Ridge to study trace metal fluxes from lithosphere to seawater. In order to pursue the above purposes, seawater samples were taken from surface to bottom by clean CTD hydrocasts (12L Niskin-X bottles) using a Ti-armored cable and a large volume (250L) water sampling system. Bottom sediments were also sampled by using a multiple corer. Measurements of chemical constituents and isotopes are on progress in clean rooms on board the ship and/or in shore-based laboratories. |
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Principle Investigator |
T.Gamo (AORI, UT) |
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Related Project |
GEOTRACES |
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Cruise Type |
GEOTRACES transection cruise (GP02) |
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Chief Scientist for GEOTRACES |
Toshitaka Gamo (Dr.) Atmosphere and Ocean Research Institute, University of Tokyo (AORI, UT) Address:
5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan E-mail: gamo (a) aori.u-tokyo.ac.jp |
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Cruise Metadata |
First Submission: done |
Update: |
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Report |
Cruise Summary Report: yes |
Cruise Report: Preliminary report(52.7MB) |
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Observation Items |
Item/Parameters |
Number |
Responsible Scientist |
Data Submission |
JODC Ref.No |
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Routine Data |
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T. Gamo |
Mar2016 |
20170097 |
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Trace
elements: Fe |
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J. Nishioka |
Mar2016 |
20170097 |
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Trace
elements: Al, Mn, Cd, Cu, Pb |
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Y. Sohrin |
Mar2016 |
20170097 |
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Trace
elements: Zn |
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H. Obata |
Mar2016/Feb2017 |
20170097 |
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Radioactive
isotopes: 230Th,
231 Pa |
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A.
Okubo |
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Stable
isotopes: 15N |
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J.
Zhang |
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Stable
isotopes: 13C |
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Y.
Kumamoto |
Mar2016 |
20170097 |
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Stable
isotopes: 30Si |
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Gregory
de Souza |
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Radiogenic
isotopes: Nd |
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H.Tazoe |
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Radiogenic
isotopes: Pb |
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K.Norisuye |
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Others:
Se |
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Y.
Nakaguchi |
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Others:
Cr |
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K.
Isshiki |
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Others:
Be-7, Be-10 |
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H.
Nagai |
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Others:
He-3/He-4 |
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Y.
Sano |
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Others:PFOA,
PFOS |
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N.
Yamashita |
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Others:14C |
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Y. Kumamoto |
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Cruise Track |
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Note |
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