Tuesday 18 December 2007 à 16:37

First experiment for the CEAMARC program

Sophie Mouge. Correspondent aboard the Aurora Australis

We’d barely sat down for breakfast when Martin told us that the first measuring instrument for the CEAMARC program was about to be put in the water.

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Tuesday 18 December 2007 à 12:30

Data for the Aurora Australis at 12h30 (= 1h30 UT)

Sophie Mouge. Correspondent aboard the Aurora Australis

Position :

- latitude: 48,5°S
- longitude: 143,5° E
Wind:
- direction: W
- speed: 24 knots
Water temperature: 10°C
Air temperature: 10°C
Water depth: 3 930 meters
Sunrise: 5h51 (18h51 UT)
Sunset: 21h26 (10h26 UT)

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Tuesday 18 December 2007 à 12:00

Position of Aurora Australis

Sophie Mouge. Correspondent aboard the Aurora Australis

FROM: Martin Riddle
DATE: 18/12/07
REPORT (SITREP) NO.: 302
UNIVERSAL TIME: 0100
LOCAL (SHIP) TIME: 1200
AUSTRALIAN EASTERN STANDARD TIME: 1200
POSITION: -48 53, 143 55
HEADING: 195
CURRENT SPEED (KNOTS): 14.7
DISTANCE TO NEXT WAYPOINT (NAUTICAL MILES): 302
DISTANCE COVERED LAST 24 HOURS (NAUTICAL MILES): 189
WEATHER CONDITIONS: sunny breaks, wind 19 kts from 272T
AIR TEMPERATURE: 9.9
SEA TEMPERATURE: 10.1
SEA CONDITIONS: 3 m SW swell with 1 m SW sea
ICE CONDITIONS: nil
REMARKS: The first CTD cast, measuring conductivity-temperature-depth from sea surface to sea bed and simultaneously collecting water from 24 depths was completed yesterday evening. After this we deployed an Argo float - an autonomous CTD controlled by an on-board computer that sinks and rises through the water-column measuring as it goes. The float will drift around for about 4 years sending back data by satellite and is part of a global network providing information on the world's oceans. We then moved about 25 nm south to deploy an acoustic mooring on the sea-bed at about 2000m which will record the calls of whales, with the data used to estimate the presence, relative abundance and movement of the different species in the region. We are now in transit towards the SAZC mooring and have the CPR deployed to our stern. Regards, Martin and Sarah.

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