The underwater data loggers record seawater temperature data for a variety of scientific research studies in UK waters and further afield.
Tritonia Scientific Ltd. provides
specialist diving support for underwater scientific
research projects, either university-based programmes or
in support of government agency science. Tritonia has used
Aquatic 2 data loggers for many years, using divers to
deploy and retrieve these loggers as it removes the need for buoyed
lines rising to the surface which could be pulled up or run over by
The recorded data has been used in numerous studies
across a number of scientific disciplines. Aquatic
temperature data is important for understanding how
ecosystems function and the long-term consequences
of anthropogenic drivers, for example, the steady rise in
greenhouse gas emissions, and dynamic changes in temperatures. The
monitoring takes place over a number of time phases and at
different depths depending on the nature of the study, but some of
the studies are now yielding long-term time series of over 20
Typically, the data loggers are used to verify seawater
temperature proxies. An example of this is the
long-lived mollusc Arctica islandica
which is used by scientists to generate time-series using
their growth rings. Tritonia's temperature datasets can be
used to match the modern growth rings against known temperatures.
Another use is to deploy the loggers over a latitudinal
range to generate temperature profiles against which
scientists can compare the growth rates of subtidal kelp
species in order to predict what the future impacts may be
of warmer seas around the UK.
The data loggers monitor the changes in seawater
temperatures at different depths, typically 10, 20 and 30
metres. Monitoring intervals on the long-term time series
are set to either 10 or 12 minutes. Most of the data loggers used
on the long-term monitoring have been deployed off the west coast
of Scotland, but they have also been used on short-term
experiments in the tropics and in both Polar Regions. The
loggers are deployed in pairs just in case of any losses or
Martin Sayer is Tritonia's Managing Director
and has used Tinytags since the mid-1990s when they were the first
product that provided the capability of long-term
temperature monitoring at low costs. He comments,
"We have simply stayed with the product because of its
reliability. The latest versions are easy to use and are very
resistant to being used in such a challenging environment. They
provide a reliable and cost-effective way of generating high
quality subtidal temperature datasets."
Cathy Clark from Gemini Data Loggers added, "It's great to
know how the Tinytags' reputation for quality and reliability is so
clearly demonstrated by their use over so many years in such a
range of interesting and valuable research."
The photograph shows a diver deploying the loggers for a
study in Belize.
The pdf shows a graph of a long-term monitoring dataset from
the seawaters around Saulmore, Scotland.