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31 Oct. 2011: Mirai

Oct.31Cloudy

We started continuous observation at the station, from 00Z on Oct.31. It was the morning, 5AM. The radiosonde released at 04:30 (Ship Mean Time (SMT)) into the dark sky. The CTD casting followed. The morning light came when the CTD sensors were coming back. The solar ray well went into the sea, to shine the orange cable connecting MSP and its deck unit.

Our observation based on 3-hourly cycle, consists of radiosonde, CTD, MSP, and atmospheric turbulent flux measurement. This is same as in Leg-1, to obtain continuous dataset for two months at the station. Though most of the scientists and technical staff changed, the operations were very smooth.

The sky was cloudy, with the altostratus / cirrus. However the radiosonde detected very dry layer in the middle troposphere. The surface isotherm layer is still over 90m, as in the end of Leg-1.

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By MK