GEOTRACES Japan Cruise Status

maintained by Japan Oceanographic Data Center.                       last updated on  31 Oct. 2017

Ship Name

R/V Hakuho-Maru

Responsible Organization

Atmosphere and Ocean Research Institute, University of Tokyo (AORI, UT)

Address: 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8564, Japan

Cruise No.

KH-14-06

Cruise Status

Done

Departure

2 December 2014

Arrival

26 February 2015

Research Area

South Pacific Ocean

Objectives

A meridional transect was undertaken along ~170W in the southern Pacific (GP19 line) to investigate biogeochemical cycles of trace elements and isotopes as part of the international GEOTRACES program by using the Japanese research vessel Hakuho Maru. The cruise consisted of 4 legs: leg-1 (from Tokyo to Wellington), leg-2 (from Wellington to Auckland), leg-3 (from Auckland to Majuro), and leg-4 (from Majuro to Tokyo). The leg-2 and leg-3 were devoted for the GEOTRACES program. Totally 52 persons, 22 scientists, 7 technicians, and 23 students, including 6 graduate students from foreign countries (China, Korea, Brunei, and Austria), participated the cruise. We aimed at establishing the first meridional profiles of GEOTRACES TEIs in the South Pacific to extract much information on biogeochemical cycles of TEIs and their roles in marine ecosystems. In order to pursue the above purposes, seawater samples were taken from surface to bottom using clean CTD hydrocasts (12L Niskin-X bottles) attached at the end of  a Ti-armored cable, together with a large volume (250L) water sampling system. Bottom sediments were also sampled by using a multiple corer. Measurements of chemical constituents and isotopes were performed in clean rooms on board the ship and are now on going in shore-based laboratories.

Principle Investigator

T.Gamo (AORI, UT)

Related Project

GEOTRACES

Cruise Type

GEOTRACES transection cruise (GP19)

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

Cruise Metadata

First Submission: done

Update:

Report

Cruise Summary Report:

Cruise Report: not yet

Observation Items

Item/Parameters

Number

Responsible Scientist

Data Submission

JODC Ref.No

Routine Data

 

 T. Gamo

 

 

Trace elements:

Fe

 

 J. Nishioka

 

 

Trace elements:

Al, Mn, Cd, Cu

 

 Y. Sohrin

 

 

Trace elements:

Zn

 

 H. Obata

 

 

Radioactive isotopes:

230Th, 231 Pa

 

A. Okubo

 

 

Stable isotopes:

15N, 13C

 

J. Zhang

 

 

Stable isotopes: 30Si

 

Gregory de Souza

 

 

Radiogenic isotopes:

Nd

 

H.Tazoe

 

 

Radiogenic isotopes:

Pb

 

K.Norisuye

 

 

Others:

Ni, Cu, and Zn isotopes

 

Y.Sohrin

 

 

Others:

Fe and Cd isotopes

 

T.Conway

 

 

 

 

 

 

 

Cruise Track

 

Note