1. The boat is docked in the inner harbor
where the water is dark and warm. The squiggly
lines just after 9AM (0900 in 24-hour time)
occur when the cooling system is flushing
with new water as the engine is started at
the dock. Then we sail through the inner
harbor to the outer harbor.
2. The outer harbor is a little warmer
today. We scoot right through the gap
into Lake Michigan, where the nearshore
water is almost 10ºC cooler (it
is early June, and the lake is just starting to warm up).
3. We are heading east, crossing the shallower coastal zone out into the deep open water of Lake Michigan. Because there is so much water, it takes a long time to warm up, and it gets cooler and cooler as we go offshore.
4. Beyond about 8 miles the lake is uniformly cool. We sail to and work at our Fox Point station 10 miles away. You cannot tell where we stopped for the station because the engine is always running and the station is surrounded for miles by cool water.
5. We return to the coastal zone to sample our shallow Linnwood station (20m deep). We search briefly for the exact location.
6. Sampling the Linnwood station near the city water supply intake. From there it is only a short distance back to the outer harbor.
7. We enter the northern part of the outer harbor through the north gap.
8. We sample the Outer Harbor North station. When finished with this brief sampling, we cross the main channel (small blip at 6:05PM or 1805).
9. We arrive at the Outer Harbor South station. Sampling here also takes about 30 minutes, after which we turn around and sail up the river.
10. We sail up the river, which is cooler in the late afternoon.
11. We returned to the inner harbor and home.
