[Coral-List] OTEC around coral reefs

Thu Jun 25 16:55:06 UTC 2020

For all you folks posting temperature profiles and info from the Pacific,
re a possible OTEC installation near Bonaire.
The oceans and their temperature profiles are actually different.....in
addition to lots of variability within an ocean, or in its adjacent basins.

I'm reminded of a time I was working in the Oceanography division of an ASW
lab. A guy from the Operations Research Group came to me and asked if I had
a temperature profile from the Atlantic Ocean. I said yes, and he said,
"Great! I've got one from the Pacific and now I can finish my report."

- Mel B.

On Thu, Jun 25, 2020 at 8:55 AM Bruce Carlson via Coral-List <
coral-list at coral.aoml.noaa.gov> wrote:

> Here are some temperatures we recorded in the Solomon Islands using T-D
> sensors on Nautilus traps.  Temps were logged once per minute over roughly
> 20 hour time span (time varied per trap set).
> These are the max/min temps recorded at the stationary traps resting on
> the bottom.
>
> 264 meters      12.44 - 15.96C
> 295 meters      11.24 - 14.82C
> 316 meters      10.44 - 12.48C
>
> Bruce Carlson
>
> > On Jun 23, 2020, at 8:31 AM, Dennis Hubbard via Coral-List <
> coral-list at coral.aoml.noaa.gov> wrote:
> >
> > Doug:
> >
> > When we made Alvin dives off the north coast of St. Croix, the
> temperature
> > registered on the sub's thermistor read WELL above freezing until we were
> > WELL beyond 2000 meters. I can't easi;y get to my notes due to Covid, but
> > the temperatures weren't particularly low (or the nutrients particularly
> > high - Susan Williams participated in the project) until we got a lot
> > deeper (remember - no Gulf Stream).
> >
> > Denny
> >
> > On Tue, Jun 23, 2020 at 8:18 AM Douglas Fenner via Coral-List <
> > coral-list at coral.aoml.noaa.gov> wrote:
> >
> >> I bet if you go deep enough (likely 600 feet or more) it will be close
> to
> >> freezing.  That's true of most all of the world's oceans, so far as I
> know
> >> (with exceptions such as shallow continental seas such as the
> >> Arabian/Persian Gulf which has a maximum depth of around 295 feet).
> >>
> >> On Mon, Jun 22, 2020 at 3:10 AM Melbourne Briscoe via Coral-List <
> >> coral-list at coral.aoml.noaa.gov> wrote:
> >>
> >>> "Cold" water near Bonaire isn't very cold. Efficiency is going to be
> very
> >>> low.
> >>>
> >>> On Thu, Jun 18, 2020 at 2:22 PM Alina Szmant via Coral-List <
> >>> coral-list at coral.aoml.noaa.gov> wrote:
> >>>
> >>>> Eric: with deep cold water comes nutrients.  Be concern about local
> >> algal
> >>>> blooms.
> >>>>
> >>>>
> >>>>
> >>>> Sent from my Samsung Galaxy smartphone.
> >>>>
> >>>>
> >>>>
> >>>> -------- Original message --------
> >>>> From: "Meesters, Erik via Coral-List" <coral-list at coral.aoml.noaa.gov
> >
> >>>> Date: 6/17/20 8:36 AM (GMT-05:00)
> >>>> To: coral-list at coral.aoml.noaa.gov
> >>>> Subject: [Coral-List] OTEC around coral reefs
> >>>>
> >>>> Hi all,
> >>>> There are now plans for an OTEC facility on Bonaire.
> >>>>
> >>>> It basically means pumping up cold water from the deep to cool things
> >> and
> >>>> discharging warmer water (often shallower).
> >>>>
> >>>>  *   Here are some examples: https://nelha.hawaii.gov/
> >>>>  *   http://otecokinawa.com/en/OTEC/WaterUses.html
> >>>>
> >>>> I can think of a lot of doomsday scenarios, but I'm looking for
> >> reports,
> >>>> assessments, thoughts, advice.
> >>>> Does anyone have experiences with OTEC facilities in the neighbourhood
> >> of
> >>>> coral reefs?
> >>>> it's often presented as the goose with the golden eggs, and
> governments
> >>>> seem to fall for it easily, but apart from glossy sales talks, I can't
> >>> find
> >>>> objective reports or EIAs.
> >>>> Thanks for your responses.
> >>>> Best wishes,
> >>>> Erik Meesters
> >>>> Wageningen Marine Research
> >>>>
> >>>> _______________________________________________
> >>>> Coral-List mailing list
> >>>> Coral-List at coral.aoml.noaa.gov
> >>>> https://coral.aoml.noaa.gov/mailman/listinfo/coral-list
> >>>> _______________________________________________
> >>>> Coral-List mailing list
> >>>> Coral-List at coral.aoml.noaa.gov
> >>>> https://coral.aoml.noaa.gov/mailman/listinfo/coral-list
> >>>>
> >>> _______________________________________________
> >>> Coral-List mailing list
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> >>>
> >>
> >>
> >> --
> >> Douglas Fenner
> >> Lynker Technologies, LLC, Contractor
> >> NOAA Fisheries Service
> >> Pacific Islands Regional Office
> >> Honolulu
> >> and:
> >> Consultant
> >> PO Box 7390
> >> Pago Pago, American Samoa 96799  USA
> >>
> >> "mitigating climate change is the critical wedge to set coral reefs on a
> >> recovery trajectory"  Duarte et al 2020 Rebuilding marine life Nature
> >>
> >> "Already, more people die  <http://www.nws.noaa.gov/om/hazstats.shtml
> >from
> >> heat-related causes in the U.S. than from all other extreme weather
> >> events."
> >>
> >>
> >>
> >>
> https://www.npr.org/2018/07/09/624643780/phoenix-tries-to-reverse-its-silent-storm-of-heat-deaths
> >>
> >>
> >> Even 50-year old climate models correctly predicted global warmng
> >>
> >>
> https://www.sciencemag.org/news/2019/12/even-50-year-old-climate-models-correctly-predicted-global-warming?utm_campaign=news_weekly_2019-12-06&et_rid=17045989&et_cid=3113276
> >>
> >> "Global warming is manifestly the foremost current threat to coral
> reefs,
> >> and must be addressed by the global community if reefs as we know them
> will
> >> have any chance to persist."  Williams et al, 2019, Frontiers in Marine
> >> Science
> >> _______________________________________________
> >> Coral-List mailing list
> >> Coral-List at coral.aoml.noaa.gov
> >> https://coral.aoml.noaa.gov/mailman/listinfo/coral-list
> >>
> >
> >
> > --
> > Dennis Hubbard
> > Chair, Dept of Geology-Oberlin College Oberlin OH 44074
> > (440) 775-8346
> >
> > * "When you get on the wrong train.... every stop is the wrong stop"*
> > Benjamin Stein: "*Ludes, A Ballad of the Drug and the Dream*"
> > _______________________________________________
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>
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