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Report from the Mirai: June 17, 1999

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Photo (left): On the staff change: saying "see you" to each other. We keep our words. We saw him working on the island several hours later.

Other snapshots from Mirai
Daily Weather Forecast Nauru Updates! Ron Brown Updates

Commentary:

We arrived at Nauru. We are now staying very near (500m) the island; we can even see the members on the ARCS site. The IOP, with a 3-hour cycle observation of radiosonde, CTD measurement and flux observation, started at 15:00 LST (03:00UTC).

Staff change-over today; Mike Susedik was replaced by Lou Verstraete.

Date: June 17, 1999
Local Time: 1200 [LT] (=0000UTC)
GPS Ship Position: 0-30S, 166-54E
Heading: (at the station)
Surface Wind: 53 [deg], 6.0 [m/s]
Temperature: 28.4 [deg]
Sea Surface Temperature: 28.2 [deg]
Surface Pressure: 1011.5 [hPa]
Boundary Layer Height: n/a
Precipitation last 24 hours: 2.2 [mm]
Cloud Base Heights:

Lidar 0.6, 10.0 [km]

Cloud Top Heights: n/a
Radiosonde Inversion Height: 2.2, 5.4, 7.1 [km] @ 1200LT

Visual Observations:

Fine, with cumulus and cirrus.

Instrument Status:


JAMSTEC

Radiosonde, Doppler radar, and ceilometer observation continue. A lined convective system was observed last night. CTD measurement also starts at 1500 LST today.

KUMM/Okayama University

From flux group: Turbulence measurements of IOP started at 15:00 LST on the water near Nauru. It is cloudy. The measurement system is working well.

From CO2 group: The CO2 measurement of IOP started at 15:00 LST on the water near Nauru. It is cloudy. The measurement system is working well.

From greenhouse effect gas group: The group of greenhouse effect gas started IOP measurements at 15:00 LST on the water near Nauru. It is cloudy. The measurement system is working well.

NIES (National Institute for Environmental Studies) and TIT (Tohoku Institute of Technology

The lidar observation is continuing. Web server of Lidar data is started. http://128.19.4.45/d1day/index.html (Only for inside Mirai)

NCAR

All systems are operating normally.

DBS profiler operated until 00:00 UT (12:00 LT); we switched to MAPR after that. DBS observed some showers last night, including heavy rain about 8pm LT. Winds were mainly light easterlies to 4 or 5 km for 24 hours to 00:00 UT (12:00 LT).

RASS sounding at 23:30 UT reached consensus to 1.3 km - much greater than usual range (typically .7 - .9 km). During the afternoon we did hourly RASS sounding; otherwise, MAPR were running.

Near the island, both MAPR and the S-Band radar are observing strong clutter echoes, probably from the island and nearby sea waves.

We had problems with data backup on S-band; we have emailed NOAA about this.

Sea snake SST sensor was deployed at 23:45 UT. Extra floatation was added later; the ship is moving very slowly off Nauru and the snake was sinking and bobbing. Now it is sitting just below the surface. At 05:00 UT, SST is 28.2C.

Previous Days' Updates:

June 16, 1999
June 15, 1999
June 14, 1999
June 13, 1999
June 12, 1999
June 11, 1999
June 10, 1999
June 9, 1999
June 8, 1999

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