It may be hard to believe if you have spent any time outside this chilly winter, but spring likely has sprung in the waters of Casco Bay. By January, the lengthening daylight has jumpstarted the growth of phytoplankton, the single-celled plants that are the foundation of the ocean food… Read more
Covered with sea squirts, sea stars, and other marine hitchhikers, the newest member of our monitoring team looks like an abandoned lobster trap. It may be homely, but we are pretty impressed with what it does, collecting water quality data hourly, 24 hours a day, 365 days a year. It… Read more
Imagine working 8,760 hours a year. Friends of Casco Bay has two water quality monitors that do just that: a datasonde, an instrument that can measure several properties of water at once, and a specialized device that only measures carbon dioxide. They are anchored together on the ocean floor in… Read more
The Care and Maintenance of Our Submerged Monitors
The only way to collect reliable data is to employ impeccable data collection methods. To that end, Mike swaps out the data sonde with freshly calibrated sensors, on a rigorously adhered to schedule. Our goal is to be able to capture 8,760 hourly data sets each year, or as close to that as equipment conditions allow.
Mike hauls up the anchored cage of devices and uploads to his laptop the data from the carbon dioxide sensor. He scrapes off marine hitchhikers, such as sea stars, tunicates, and algae, and makes note of any invasive species attached to the equipment or the cage. He often exclaims “It is amazing how fast sea creatures occupy any available surface under water, including our instruments!”
He swaps the data sonde for the one with freshly calibrated sensors, and checking to make sure the devices are secured, he then lowers the cage back onto the ocean floor. The retrieved data sonde is brought back to our lab, the data is downloaded and housed, and the sonde and its sensors are cleaned, soon to be re-calibrated for re-deployment. Such attention to detail provide quality assurance about the accuracy of the data.