Icy Inverts 2004 | ||||||||||||||||||||||||||||||||||||||||||||||
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Daily Journal of the R/V Laurence M. Gould | ||||||||||||||||||||||||||||||||||||||||||||||
Nov. 29, 2004 --- Position Lat/Long: S056° 24.538 W061° 25.910 | ||||||||||||||||||||||||||||||||||||||||||||||
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Our weather window has held out so far. Seas are about 4 feet, and the wind is in the low 20’s. Captain Mike (“The Buck Stops Here”) Terminel reports he was watching a front coming our way that would probably have kicked us around some (“oh yeah, we’ve had 40 foot seas with steady 50 mph winds for 4 days!”).
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Good news is, it turned south instead of staying east, and missed us. Thank you, King Neptune. We have crossed the Burwood Bank and water depth has gone from a manageable (for benthic tows) 101 meters on 26 Nov., to over 4200 meters today! Plankton tows today are yielding photo- not zoo-, so we’re looking for almost clear critters in stuff that looks like guacamole. Actually, the Lab Czars have come up with a plan to run the green stuff through a sieve system that clears it out quite a bit - only thing is, we haven’t found any target critters in the last couple of tows. (Our greatest contribution this afternoon was pair of salps for the lab across the hall.) I rather enjoyed looking through the diatoms (what the green stuff is made of), because they sort of shimmer, and are of very uniform size, like little pieces of greenish-blue fiberglass. Sort of gets you in the Christmas spirit.In an alternate pattern to plankton tows, a measuring device called an XBT is being used to measure the temperature of the water through the water column. Sandy Williams, a WHOI scientist/engineer, explains how this works, and has provided a chart that shows what the instrument is telling us via a colorful array [See Image 1 XBT]: Catch of the Day: A lobate (lobed) ctenophore [See Image 2 - Lobate Ctenophore] was captured by the dive group, on what will probably be the last dive for a couple of days. It is extraordinary in that it looks like a more common ctenophore, but has what look like football player's shoulder pads on one end. Scientist Larry Madin says that it has not been described officially for science before (written up in a journal and named), so it remains nameless as an individual species. Anyone care to suggest a name for this jelly? I thought “Bubba” would be fitting, but I think more serious people would like a more scientific, Latin-sounding name. Speaking of pet names, Adriene has adopted a squid critter from one of the benthic tows, whom she proudly introduces as “Chile”. Technically, there are no pets allowed on ship, but it’s ok if they’re in a jar. …and Chile doesn’t eat much. (We’re having a hard time breaking the news to Adriene that Chile is not really moving or breathing much, either. Sometimes “denial” is a beautiful thing.) |
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Tomorrow we finish the Drake Passage and look forward to Elephant Island! |
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