Lisa Roberts blog


Acidification demonstration

Filed under: Climate-Change-Communication, Presentations, Science — Lisa @ 07:57

In today’s Scuttlebutt newsletter I read:

Event Description

Guest lecturer Dr. Richard Feely will discuss the present and future implications of increased temperature and CO2 levels as they relate to the health of our West Coast ocean ecosystems. He will also conduct a live demonstration of ocean acidification.

Dr. Feely is a senior scientist at the National Oceanic and Atmospheric
Administration (NOAA) Pacific Marine Environmental Laboratory in Seattle.
He also holds an affiliate full professor faculty position at the
University of Washington’s School of Oceanography. His major research
areas are carbon cycling in the ocean and ocean acidification processes.
He received a bachelor’s degree in chemistry from the University of St.
Thomas, in St Paul, Minnesota in 1969. He then went on to Texas A&M
University where he received both a master’s of science degree in 1971
and a Ph.D. in 1974. Both of his post-graduate degrees were in chemical

He is the co-chair of the U.S. CLIVAR (Climate Variability and
Prediction)/CO2 Repeat Hydrography Program. He is also a member of the
steering committee for the U.S. Ocean Carbon and Biochemistry Program. He
is a member of the American Geophysical Union and the American
Association for the Advancement of Science.

Dr. Feely has authored more than 200 refereed research publications. He
was awarded the Department of Commerce Gold Award in 2006 for his
pioneering research on ocean acidification. In 2007 he was elected to be a
Fellow of the American Geophysical Union.
For more information, please visit our website or call (562) 590-3100,
ext. 0.


$5 for public; FREE for Aquarium members, seniors (age 62+), teachers, and
students with valid ID and advanced reservations


Wednesday, May. 25 (7pm—8:30pm)


Aquarium of the Pacific

100 Aquarium Way

(562) 951-1663

LIMELIGHT Long Beach Events Calendar, more information.

Method of performing in situ calibrated potentiometric pH measurements

Posted: 23 May 2011 12:37 AM PDT

A device for the precise and accurate potentiometric pH measurements in
situ. Embodiments of a potentiometric device according to the invention
consist of one or more glass pH-sensitive electrodes connected to a
potentiometer. A key feature of the device is that, rather than being
calibrated conventionally with buffers, it can be calibrated with an in
situ device that measures pH spectrophotometrically. Spectrophotometric pH
measurements obtained via sulfonephthalein absorbance measurements are
inherently calibrated (do not require buffers). Thus, devices according to
the invention allow for continuous potentiometric pH measurements with
occasional spectrophotometric calibrations. The spectrophotometric
calibration device consists of a spectrophotometer with associated pumps
for combining a sulfonephthalein pH indicator with the aqueous medium whose
pH is to be measured. The device will record potentiometric pH measurements
for an extended period of time until the spectrophotometric device is
autonomously activated for another calibration. In this manner precise and
accurate pH measurements can be obtained continuously in the environment,
and the low energy expenditure of the potentiometric device provides
excellent endurance. Also provided is a method and associated devices for
spectrophotometrically determining the salinity of an aqueous medium.

Inventors: Byrne, Robert H. (St. Petersburg, FL, US)

Application Number: 12/180021

Publication Date: 05/17/2011, 17 May 2011. More information.

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