Outline of Main Research Theme for Research Vessel “MIRAI”
during fiscal year 2006

1. Cruise Code :
MR06-05 Leg-1 and Leg-2

2. Main research theme :
Leg-1: The Study of the Air-Sea Interaction in the Tropics
Leg-2: Tropical Ocean Climate Study
* The name of the whole cruise is "MISMO" (Mirai Indian Ocean cruise for the Study of the MJO-convection Onset).

3. Objectives :
The Madden-Julian oscillation (MJO) is the dominant intraseasonal variability in the Tropics. The MJO influences not only the tropical climate but also the variability of precipitation and other many atmospheric and oceanic parameters over the world through the interaction with the monsoon, El Nino, and so on. The objective is to understand the characteristics of the atmospheric and oceanic variability in the equatorial Indian Ocean during the season of onset of convections in the MJO. For this purpose, the stationary observation in the first leg and the maintenance of TRITON buoys in the second leg will be the major missions, respectively.

4. Outline of observation :
In the first leg, the stationary observation at (0, 80E) will be carried out from the late October through the late November about one month. The period and location were decided by referring the past studies. During this intensive period, various atmospheric and oceanographic observations including Doppler radar, radiosonde, CTD, ADCP, and so on will be carried out. Deployments of several moorings will also be conducted before the stationary observation.
In the second leg, two TRITON buoys and one sub-surface ADCP mooring will be replaced with new ones. In addition, one m-TRITON buoy will be deployed at (1.5S, 90E). CTD observations as well as surface atmospheric / oceanographic measurement will also be carried out.

5. Main research area :
Leg-1: (2N-2S, 80E-90E)
Stationary observation for one month will be carried out at (0, 80E).
Leg-2: (5N-5S, 80E-95E)
TRITON mooring sites are (1.5S, 90E) and (5S, 95E).
Sub-surface ADCP mooring and m-TRITON will be deployed at (1.5S, 90E).

6. Cruise period :
Leg-1: (From the beginning of October through the late November (56 days)
Leg-2: From the late November through the mid-December (21 days)

7. Ports of call :
Port of departure:
Sekinehama, Japan
Port of call: Singapore
(leg-1)
Port of call: Maldives
(leg-2)
Port of call: Singapore

8. Proponent of main research theme :
Kunio Yoneyama (Meteorology)
Yoshifumi Kuroda (Physical Oceanography)
Keisuke Mizuno (Physical Oceanography and Fisheries Oceanography)

9. Contact person for questionnaire on this cruise :
Leg - 1

Kunio Yoneyama
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
Phone: +81-46-867-9465, Fax: +81-46-867-9255, E-mail: yoneyamak@jamstec.go.jp
Leg - 2

Yoshifumi Kuroda
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
Phone: +81-46-867-9912, Fax: +81-46-867-9835, E-mail: kuroday@jamstec.go.jp

Keisuke Mizuno
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
Phone: +81-46-867-9820, Fax: +81-46-867-9835, E-mail: kmizuno@jamstec.go.jp

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