University of Otago Automates Marine Research Programme
Almost 60 years of manual measurement of Otago Harbour’s seawater by the University of Otago is now getting an important technology update thanks to Adroit.
Measurements of ocean surface temperature have been collected manually at 09:00 AM daily since 1953, from a pier at the Portobello Marine Laboratory in the Otago Harbor. This is a globally significant data set that forms one of the longest continuous in-situ daily ocean temperature records in the Southern Hemisphere.
The data provides a record of local and national significance for monitoring, understanding and predicting marine environmental change, and in a shallow water ecosystem that’s common around
the data’s global significance is because there is a scarcity of long-term records of in-situ daily temperature.
“We have daily temperature information from satellites, but those data sets only stretch back to the early 1980’s. So, our long-term records are really important for understanding climate variability and
change, and it’s very hard to attribute change unless you have a multi-decadal data record,” Dr. Smith says.
“And what the data is telling us is that waters around the South Island of New Zealand have warmed significantly over the past 50 years or more, and we’re currently undertaking research using this temperature data set into trends and drivers of marine heatwaves around New Zealand”.
Originally the Department of Marine Science only measured daily temperature, daily meteorological observations, and a daily biological time series, related to sightings of the squat lobster, Munida gregaria, and whether or not they’re present in the Harbor.
This was later updated to add 15-minute dissolved oxygen and temperature data in 2011, but that is semi-automated in that someone has to download it every month, and data were not publicly available.
“The current system of ocean data collection at the Portobello Marine Laboratory remains similar to the process they first employed in the 1950’s, but we’ve been really interested in being able to automate, update and also expand the ocean monitoring and facility of the Portobello Marine Laboratory,” Dr. Smith says.
So, in July, Adroit installed, at the same pier where they take their temperature reading, a Libelium Plug & Sense data logger and In-Situ multi-parameter sonde. The sonde contains four sensors, which measure parameters including temperature, salinity, pH, chlorophyll-a and dissolved oxygen sitting at a one-metre depth inside of the channel. It takes a measurement every hour and transmits the data via the Spark IoT network to the Adroit Platform hosted on AWS.
Dr. Smith has enjoyed Adroit’s input into the project and the expert knowledge they provided.
“It’s been really constructive working with the folks at Adroit, working with Guy and Ulrich. They’ve been really great, Ulrich in particular, working onsite to help get the solution and running.
“And I think we’re just really stoked to be able to provide researchers, public, and also industry with this free, reliable access to water quality information from a Harbour in near real-time,” Smith says.
Real-time and historical data from the new sensors will be made freely available to the public and researchers via a University of Otago webpage that will be launched in early spring 2021, following the completion of a commissioning and testing phase of the new equipment.
Pictured: The Portobello Marine Laboratory in Otago Harbour where the Adroit team installed the water sensor.
Photo credit: Emeritus Professor Steve Dawson, University of Otago.