Ground-truth

I revised the logs for the cleaning and found the following:

Quick cleaning of the station was done twice in June and Twice in July. The last ground-truth logged was on May 31 (I do not remember if Mike ground-truth during his visit). The next ground-truth event will be Sept. 6 while training the new batch of volunteers.

Hope this helps;

Francisco

Maintenance Update

On Thursday morning a team of six divers work for over 2 hours cleaning the station and taking most of the living growth out.

We took some pictures and I will [upload them soon]. I am planning on going out next week and also connect the small CTD.

Francisco

Science Support for La Parguera Station

Report on the ICON/CREWS Science Meeting

During the week of April 24 - 27, 2006, over twenty scientists, students and colleagues met in La Parguera, Puerto Rico for a Science Meeting (aka Think Tank #4) of Integrated Coral Observing Network (ICON) colleagues to help start a Climate Change/Ocean Acidification program at the University of Puerto Rico (UPR), Department of Marine Science's Magueyes Island Marine Laboratory, site of the new NOAA/UPR collaborative Caribbean Coral Reef Institute (CCRI). Drs. Chris Langdon (RSMAS/UM), Joanie Kleypas (NCAR), Dwight Gledhill (NESDIS) and Matthew Huber (Purdue) gave presentations on climate change and explained how the ocean's carbonate chemistry has changed over the millenia, and how it will likely change in the future. New efforts and collaborations (Drs. Julio Morrell and Jorge Corredor--UPR) began with the Caribbean Regional Association of the Integrated Ocean Observing System (IOOS), as well as a discussion of ongoing collaborative research efforts in oceanography (Dr. Francisco Pagan--UPR), ocean optics (Drs. Roy Armstrong and Yasmin Detres--UPR), coral bleaching and disease (Drs. Ernesto Weil [UPR], Alina Szmant [UNCW], and Ruben van Hooidonk [Purdue]), hydroacoustics (Drs. Rich Appeldoorn [UPR/CCRI], Jose Rivera [NMFS] and Doran Mason [OAR: AOML & GLERL]) and other projects.

Plans were instituted to utilize existing data from, and add new instrumentation to, the Coral Reef Early Warning System (CREWS) station at nearby Media Luna Reef. Data from the underwater ultraviolet light sensors, as well as other instruments at the Magueyes Island Laboratory, will be utilized to calculate a Saharan Dust Index in near real-time, beginning just ahead of the June influx of Saharan Dust at La Parguera. These data are expected to give new insight into the effects the dust has on coral and other marine diseases. A pCO2 sensor and water sampler will be installed during May and June to begin studies in ocean acidification; other proposals are in for purchasing another model of pCO2 sensor, and for total alkalinity and oxygen sensors. An anticipated new source of radar data from Purdue's Rosen Center for Advanced Computing will help provide new Level Two 3D representation of precipitation and wind vectors for the area, and will thus provide ICON and IOOS efforts a new data source for rain influence on runoff and bloom studies in the local embayment, as well as effects in local oceanographic processes. Plans have also been discussed for the implementation of a passive hydroacoustic sensor at the CREWS station for sensing local fish, marine mammal and diel plankton movements in the area; proposals are also in for the purchase of an Acoustic Doppler Current Profiler and acoustic modems to provide circulation data for the La Parguera Marine Preserve.

Finally, award-winning book author Alanna Mitchell (Dancing at the Dead Sea: Tracking the World's Environmental Hotspots) attended the meeting and interviewed the scientists for her new book, The Deeps: The Secret Ecological Crisis of the Global Ocean.

Cheers,
Jim

shallow BIC replaced - deep BIC moved

Station was shut down at 12:15 pm - "brain" removed on 4/25/2006 by field team (Louis Florit, Lew Gramer, Jeff Absten) in order to replace the non-reporting shallow BIC sensor. The corresponding cable was also replaced. The deep BIC sensor was cleaned and moved to a new bracket holding the sensor approx. 1m out from the pylon.

While the station was shut down, a cable for the SAMI pCO₂ sensor was installed, and the mounting bracket for the unit was bolted onto the pylon by divers (Jim Hendee, Jeff Absten).

"Brain" reinstalled and station turned back on 4/27/2006 at 9:20 am. All instruments reporting except for deep BIC. 10:00 am transmission interupted due to radio modem interferance. 11:00 am first confirmed transmission.

Groundtruth CTD deployed : no cleaning done to CTDs at this time.

Pylon was wiped clean. Chains and legs were not cleaned, some bivalves found growing on chain should be removed.

10-20 small squid hanging around 1m. About 5-10 Small 8" parrot fish observed around base of station. 1 small 8" grouper at baseplate.

LPPR1 CTD update

Some good news: Jules and Hector have removed the plastic capillary tubes from the CTDs at La Parguera. It's too soon to draw any definite conclusions but it looks like the depth numbers are once again behaving properly. See for example at:

ftp://ftp.aoml.noaa.gov/pub/ocd/jankulak/lppr1-2006.xls

Shoe reports that the capillary tubes (which he is sending back to Falmouth) are clogged with growth. Falmouth is either going to send us some wider tubes, or perhaps tell us to deploy the instruments without the tubes from now on, I'm not sure which.

This doesn't explain 100% of the problems we've had but it's a promising sign.

regards,
Mike J+

Near-Bottom

At left is a picture of the near-bottom part of "the stick" during cleaning, week of April 10, 2006. Note positioning of deep CTD and BIC light sensor. Photo by Jules Craynock.

Shallow BIC Light Sensor

Above is a picture of the shallow (i.e., near-surface) Biospherical Light Sensor during cleaning, week of April 10, 2006. Photo by Jules Craynock.