Scientific Reports
Scientific Reports
>Received: by melville.UCSD.EDU (8.9.3+Sun/UCSDUUCPGENERIC.4)
id BAA25740 to ; Tue, 30 May 2000 01:05:16 GMT
Date: Tue, 30 May 2000 01:05:16 GMT
From: melville!jacobson@sdsioa.UCSD.EDU (Dan Jacobson)
To: shipsked@ucsd.edu
Subject: NEMO03MV weekly report # 2
Cc: jacobson@sdsioa.UCSD.EDU, pisias@sdsioa.UCSD.EDU, scg@sdsioa.UCSD.EDU
>From pisias@melville Mon May 29 12:08 GMT 2000
Date: Mon, 29 May 2000 12:08:12 +0000 (GMT)
From: Nicklas Pisias - NEMO03 <pisias@melville>
Subject: Re: SIO Log #21
To: jacobson@melville
Cc: mix@melville
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R/V Melville NEMO Expedition - III
Weekly Report 5/29/00
Nick Pisias & Alan Mix (co-chief scientists)
After two weeks at sea on NEMO Leg III, R/V Melville has crossed
the equator east of Galapagos. All systems continue to function
well. Melville is proving to be an excellent platform for long coring
with its A-frame moved aft. More than 165 m of mud have been
recovered so far, and two cores are >19 m long. More importantly, the
cores are taken in the best possible places, guided by excellent
geophysical data. Near-realtime processing of digital seismic
reflection profiles by the Boise State team (led by Dr. Mitch Lyle),
and extraordinary real-time three dimensional images of the sea floor
by master bathymetrist Dr. Chris Goldfinger again make us appreciate
the complexity of abyssal sedimentation. Preliminary stratigraphic
analysis suggests that we now have two relatively unique high
sedimentation rate cores (~10cm/kyr) one on the equator and one in
less than 1000m water depth.
We are happy to report that 22 new shellbacks paid appropriate
respects to King Neptune. SIO Res Tech Shad Baiz particularly enjoyed
the experience, and commented that he'd really like to do it again
next time he crosses.
>Received: by melville.UCSD.EDU (8.9.3+Sun/UCSDUUCPGENERIC.4)
id NAA01609 to ; Mon, 22 May 2000 13:33:53 GMT
Date: Mon, 22 May 2000 13:33:53 GMT
From: melville!jacobson@sdsioa.UCSD.EDU (Dan Jacobson)
To: shipsked@ucsd.edu
Subject: NEMO03MV science report
Cc: jacobson@sdsioa.UCSD.EDU, mix@sdsioa.UCSD.EDU, scg@sdsioa.UCSD.EDU
Liz and Rose,
Below is the first science report for NEVO03MV.
Thanks,
Dan
>From mix@melville Mon May 22 05:13 GMT 2000
Date: Mon, 22 May 2000 05:13:28 +0000 (GMT)
From: Alan Mix - NEMO03 <mix@melville>
Subject: Melville weekly report 5/21
To: jacobson@melville, pisias@melville
R/V Melville NEMO Expedition - III
Weekly Report 5/21/00
Nick Pisias & Alan Mix (co-chief scientists)
R/V Melville departed Manzanillo 15 May for Leg III of the NEMO
Expedition, but propulsion problems halted operations just out of
port. Special thanks to Chief Engineer Paul Bueren and his group for
extraordinary effort in getting us back on track after a very long
night. With good weather and a few extra turns, we are back on
schedule.
The science team is mostly from Oregon State Univ, but also includes
participants from Boise State Univ, Univ South Carolina, Univ British
Columbia, WHOI, Univ Miami, Indiana Univ of Penn, UNAM-Mexico, and
EAFIT-Colombia. A special feature of this cruise is research
experience for undergraduate students from California, Oregon, &
Washington, with their faculty advisor Peter Eilers of Willamette
University. This is an enthusiastic and hard-working group.
Primary scientific goals of NEMO-III include exploring
paleoceanographic variations in the oxygen minimum zone driven by
changing upper-ocean circulation and productivity and/or changing
subsurface ventilation of intermediate water masses. Survey results
will help to finalize sites for Ocean Drilling Program operations
scheduled for 2002.
Operations so far have included seabeam and seismic survey
in the Gulf of Tehuantepec, hydrocasts through the O2 minimum, and
piston coring using three systems supplied by Oregon State University
- a large-diameter "jumbo" piston core, a small-diameter long piston
core, and a multicore. With Melville's starboard A-frame moved aft
(thanks to SIO/MARFAC) we can rig cores up to 80-ft long, and have
so-far tested to 70 ft. Coring is working well, thanks to OSU coring
techs Pete Kalk and Chris Moser. The SeaBeam and seismic data are
both excellent.
Melville is now transiting south toward Cocos Island, following
successful survey and coring operations. We are well supported by the
ship's staff (thanks to Captain Chris Curl and his crew) and the SIO
science staff (thanks to Shad Baiz, Gene Pillard, Seth Mogk, and Dan
Jacobson) and very well fed (thanks to Eddy and George). Equator
crossing is expected next week, and the pollywogs are nervous. All is
well.
This cruise is being funded by a grant from the National Science Foundation
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