From: Pat Wheeler
Subject: Revelle Report Jan 17-20
In the previous report I forgot to mention that Rob Pinkel had two people on
board during our loading to add software so that we could use his high
resolution ADCP system. This tested out well and we plan to use it.
Jan 17 transit north continued, no in water testing of gear, fog at night
Jan 18 continued transit, very smooth ride, beautiful weather
Jan 19 arrival at CH-6 03:00
We completed a 12 depth "pump station" with all chemistry and optics on-line.
The afternoon was devoted to setting up and deploying Moum's bottom mooring
(lander). Murray's mooring were all sighted, as was the met buoy. Moum's
anchor
and float are at 45 00.419 N 124 12.206 W (124 m) and the bottom lander is at
45 00.256 N 124 12.205 W (123 m).
We ran inshore along 45 0.6 N and scouted 3-4 lines of crab pots between the
70
m and 50 m. The plan was to run a 5 depth pump station at CH-1 but CTD on
Hale's sled failed. Several attempts of repair were not successful so we
remained inshore until daylight.
WECOMA is within a mile of our mooring site and Jack and I made radio
contact.
At daylight we moved south to 45 00 N, and noted locations of several crab
pot
lines again between 50 m and 80 m and completed two ADCP transects along 45
N.
Hales' CTD was succesfully repaired and we started our first profiling
transect
at 13:00. Our plan is to pull Hales' sled and Moum's Chameleon to the suface
to
cross the crab pot lines. So far we've been successful. To be safe we may
restrict our inshore towing work for daylight hours. We plan to run the
profiling transect to CH-7 today which should take 16 h. Then we will return
to
CH-6 for a 12 depth pump station.
We had radio contact with the WECOMA again just as they finished their small
box
survey.
We see interesting temperature inversions and a weak subsurface fluorescence
signal near the bottom across the inner shelf. We also see the strong fresh
water signal that Jack reported.
On our profiling transect (moving westward) we lose internet connections and
e-mail so we will not be able to download data until we head back inshore.
Pat Wheeler
Chief Scientist
RV Revelle
