CODENET COCCOLITHOPHORID ECOLOGY CRUISE
Basic plan and schedule
Lisbon June 1999, organisers Mario Cachao, Anabela Oliviera, Hanno
Kinkel, Jeremy Young
Selected Area and Proposed Station Locations
We will be studying the area offshore from Cabo da Roca (NW of Lisbon) -
This area was selected, since
- From previous work we know there are reasonably abundant
coccolithophores, including most of the CODENET key-species;
- More or less persistent (moderate) upwelling conditions close to
shore occur here at this time of year;
- With a short transect we can go from nearshore to open ocean
- The area is away from the influence of the Tagus turbid plume;
- We were constrained by the location of the departure harbour and the
limited autonomy (aprox. 12-14 hours per day) of the ship.
If the map is too small click it for a larger version
(with no extra detail)
Taking into account the tides and the maximum speed of the ship, we
propose the following:
Day 12 (Saturday) - reception of the participants
Day 13 (Sunday) - planning workshop on the Natural History Museum at
Day 14 (Monday) - 1st day cruise (dark triangle 10 stations) over the
shelf area across the upwelling front. Departure from Alfeite at 6.00 AM
and estimated arrival at Alfeite at 8.00 PM.
Day 15 (Tuesday) - 2nd day cruise (dark dot 6 stations) from the shelf
limit offshorewards. Departure from Alfeite at 6.00 AM and estimated
arrival at Alfeite at 8.00 PM.
Day 16 (Wednesday) - post-cruise workshop
Day 17 (Thursday) - Departure of the participants
Our proposal is that in each day a distinct path (near shore in the
first day and outer shelf offshore in the second day) is covered to meet
everybody requirements (otherwise we don't have enough time to cover both
SeaWiFS Satellite imagery from this area will be used in
order to estimate the existence and extension of the upwelling front.
This is being arranged through co-operation with Steve Groom at
NERC-Plymouth Marine Laboratory. CZCS satellite imagery is available from previous years. Our proposal is that 5, 30 and 80 m water depths could be
sampled. However, since the CTD and nephelometry can be followed in real
time the decision to collect water samples at other water depths can be
made on ship. The number of stations that we propose should be considered
the highest possible number to achieve in the usefull time available to
work on ship in each day. Priority will be given to quality over quantity
of samples and the actual number of stations may be reduced.
A core sample set for communal anaysis will be identified during the
post-cruise workshop, based on light microscopic review of filters, to
identify the most promising samples.
Return to: top
Cruise scientific aims,
Cruise logistics and participation,
Please send comments or corrections to Jeremy Young