This is a blog entry I wrote for the Ocean Sampling Day (please see http://www.microb3.eu/osd for more information). We sample twice a year for the OSD and the filtered samples are frozen and send back for analysis.
and Amber taking water samples. |
(Photo: Peter Webster)
by the ice edge with crabeater|
seals paying a visit.
|North Cove is still covered in ice.|
|Map of Ryder Bay showing the three CTD |
sites (open circles): 1 is the main site (CTD1),
2 the secondary site (CTD2), and 3
is the fall-back site at Biscoe Wharf (WS3).
Same as last year, we filtered 2l for each filter. However, on the ship last summer we finally got some Sterivex filters in which we used (4 replicates). They were frozen immediately with liquid nitrogen and are being stored in the -80°C freezer until the ship next March picks them up together with the samples from our Ocean Sampling Day in the summer.
The RaTS program includes various aspects of sampling. With our CTD we measure depth, salinity, temperature, PAR and fluorescence and the water samples we take back are mostly bottled up for analysis back in the UK by a number of different institutes. We analyse chlorophyll and ammonia in our lab here at Rothera. Whereas analysis for HPLC, nutrients, CO2, salts, isotopes, DOC, viruses, Barium and metagenomics is conducted elsewhere.
Sabrina Heiser, Rothera Marine Assistant
Crew: Amber Annett (Marine Assistant for the Dutch collaboration), Peter Webster (Diving Officer)