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Infrastructure

Empirical prediction of snow and land-fast sea ice temperature

C-Core

Pistolet Bay,

Newfoundland & Labrador,

Canada

beadedstream Temperature Acquisition Cables and D405 data loggers were critical to the success of this study. They proved reliable in harsh conditions, and because of them we were able to make important advances in remote prediction of snow and sea ice physical properties.”

Ian Turnbull 
Ph.D, P.Geo, PMP, Ice Researcher

linkedin/beadedstream

844.488.4880

www.beadedstream.com

contact@beadedstream.com

Understanding the thermal properties of sea ice and the snow cover over it can help determine the strength of the ice and what impacts it can have on infrastructure such as ships, ports, bridges and offshore structures.

C-Core was looking to correlate snow and ice temperature to meteorological data and used beadedstream Digital Temperature Probes to capture the sub-surface temperatures. They then developed empirical linear regression models which can be useful for prediction of snow and ice conditions where meteorological data is available but snow/ice temperatures are not.

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Application

The temperature of sea ice impacts its strength, which then impacts the potential loads on offshore structures. In many cases, however, the temperature of the sea ice itself is not monitored but air temperatures are available. Complicating matters, snow over the sea has different properties and can insulate the ice and impact the change in ice temperature.

C-Core aimed to measure and correlate air, snow and sea ice temperatures, wind speed and thickness of the layers of snow and sea ice. This correlation could then be used in situations in which air temperature is available but sub-surface temperatures are not.

 

beadedstream Solution

beadedstream Digital Temperature Probes were installed through snow and sea ice for four to five days in each of 2017, 2018 and 2019. Two sites were set up each with three probes connected to one D405 with readings every five minutes. The probes were 1m long, with 41 sensors at 2.5cm spacing.

The C-Core team also measured ice thickness and wind speed using equipment from other suppliers.

beadedstream Solution Benefits

Each probe contained a nearly continuous string of sensors along the entire length, allowing for tight resolution of data. This allowed for classification of each data point as snow or ice, when correlated with the ice thickness data set while also having a data point at or near the snow/ice interface. The temperature probes were installed 15m apart and data was averaged between the six probes to account for location or instrument biases.

The loggers were each able to monitor all the sensors from three probes (123 total sensors) and were able to be quickly installed at site for each test period. Data was downloaded from the logger via an iOS app.

Citation: Turnbull, Ian & Torbati, Reza & Taylor, Rocky & Pritchett, Robert. (2019). Empirical Prediction of Snow and Land-Fast Sea Ice Temperature from Surface Meteorology on Pistolet Bay, Northern Newfoundland. Results in Engineering. 4. 100059. 10.1016/j.rineng.2019.100059.

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