Thursday 10 January 2008 à 16:06

Position of Astrolabe at 10:15 UTC

Anne Goffart. Correspondent aboard the Astrolabe

66°41 S
139°56 E

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Thursday 10 January 2008 à 13:55

Position of Aurora Australis

Sophie Mouge. Correspondent aboard the Aurora Australis

FROM: Martin Riddle
DATE: 10/01/08
REPORT (SITREP) NO.: 325
UNIVERSAL TIME: 0100
LOCAL (SHIP) TIME: 1200
AUSTRALIAN EASTERN STANDARD TIME: 1200
POSITION: -65 23.6S, 149 29.6E
HEADING: Various
CURRENT SPEED (KNOTS): 0 Kts
DISTANCE TO NEXT WAYPOINT (NAUTICAL MILES): n/a
DISTANCE COVERED LAST 24 HOURS (NAUTICAL MILES): 120.2 Nm
WEATHER CONDITIONS: Overcast with low cloud, good visibility, wind 18 kts from 330T gusting to 23 kts
AIR TEMPERATURE: 0.0
SEA TEMPERATURE: -1.6
SEA CONDITIONS: Moderate seas and WNW swell 3 m
ICE CONDITIONS: Frequent ice-berg, ship sitting in open water close to edge of pack-ice.
REMARKS: We are continuing working southwards, sampling along the eastern transect of the CASO circuit. This morning we deviated slightly to the west to avoid dense pack-ice that accumulates to the north and east of the Mertz Glacier. To avoid speending time pushing through the sea ice we have re-located the sampling sites so that they follow the ice edge southwards towards the continental shelf break. On each of the CASO stations we have occupied so far we can see a distinct layer of cold, oxygen-rich bottom water near the sea-floor. There is, however, a clear contrast between the bottom water measured on the western and eastern CASO legs. In the west, we sampled the bottom water formed in the Mertz polynya area, which is fresher than the water above it and particularly rich in oxygen and chlorofluorocarbons (CFCs). In the east, the bottom water is lower in oxygen and is much saltier, indicating this water was formed in the Ross Sea and has travelled west through the deep channel south of the Balleny islands.
Regards, Martin and Sarah.

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Thursday 10 January 2008 à 13:15

First operations on the Astrolabe!

Stéphanie Pavoine. Based in Dumont D’Urville station

At the first breakfast on board, I gulp down a coffee and descend to the hold.

Lire la suite

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Thursday 10 January 2008 à 11:08

A hole in the ozone layer

Sophie Mouge. Correspondent aboard the Aurora Australis

Big areas of pack ice are surrounding the ship… For those of us present on the bridge this morning, this allows us to spot the first emperor penguins of the voyage!

Lire la suite

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Thursday 10 January 2008 à 10:53

Data for the Aurora Australis

Sophie Mouge. Correspondent aboard the Aurora Australis

Position of the icebreaker:
latitude: 62°24.520' S
longitude: 149°12.330’ E
Wind:
direction: N
speed: 10 knots
Water temperature: -1.6°C
Air temperature: 0.3°C
Atmospheric pressure: 982 hPa
Relative humidity: 85%
UV-B: 5.4 W/m²
Water depth: 3,000 meters
Sunset: 23h42/ sunrise: 02h39

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