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Water temperature is a critical variable in stream ecology, and in particular has direct implications for fish populations. Automated data loggers are being used to record year-round hourly measurments of water temperature in various watersheds in Torngat Mountains national park. Note that because the data loggers being used (Hobo U20) also records hourly water level readings this measure is co-located with a stream hydrology measure.

Monthly, seasonal and annual trends of daily minimum, mean and maximum surface air temperature change (degrees Celsius) based on homogenized station data (AHCCD) are available. Trends are calculated using the Theil-Sen method using the station’s full period of available data. The availability of temperature trends will vary by station; if more than 5 consecutive years are missing data or more than 10% of the data within the time series is missing, a trend was not calculated.

Gridded monthly, seasonal and annual mean temperature anomalies derived from daily minimum, maximum and mean surface air temperatures (degrees Celsius) is available at a 50km resolution across Canada. The Canadian gridded data (CANGRD) are interpolated from homogenized temperature (i.e., AHCCD datasets). Homogenized temperatures incorporate adjustments to the original station data to account for discontinuities from non-climatic factors, such as instrument changes or station relocation. The anomalies are the difference between the temperature for a given year or season and a baseline value (defined as the average over 1961-1990 as the reference period).

Hydrology is a key factor affecting biodiversity and the ecological functioning of aquatic and riparian ecosystems through sediment transport, erosion, water chemistry, etc. Automated data loggers are being used to record year-round hourly measurments of absolute in-stream pressure, absolute barometric pressure and water level in headwater streams of the Ivitak focal watershed, in Torngat Mountains national park. Note that because the data loggers being used (Hobo U20) also records hourly water temperature readings this measure is co-located with a stream temperature measure.

Seasonal and annual trends of mean surface air temperature change (degrees Celsius) for 1948-2016 based on Canadian gridded data (CANGRD) are available at a 50km resolution across Canada. Temperature trends represent the departure from a mean reference period (1961-1990). CANGRD data are interpolated from adjusted and homogenized climate station data (i.e., AHCCD datasets). Homogenized climate data incorporate adjustments to the original station data to account for discontinuities from non-climatic factors, such as instrument changes or station relocation.

The Homogenized Surface Air Temperature data consist of monthly, seasonal and annual means of homogenized daily maximum, minimum and mean surface air temperatures (degrees Celsius) for 338 locations in Canada. Homogenized climate data incorporate adjustments (derived from statistical procedures) to the original station data to account for discontinuities from non-climatic factors, such as instrument changes or station relocation. The time periods of the data vary by location, with the oldest data available from the early 1880s at some stations to the most recent update in 2017. Observations at co-located sites were sometimes joined in order to create longer time series.

Since 2009, up to nine (9) streams (White River, Willow River, Oiseau Creek, White Gravel River, North Swallow River, Swallow River, Cascade River, Tagouche Creek and Imogene Creek) are monitored with stream temperature HOBO loggers to assess thermal suitability for Brook trout (Salvelinus fontinalis). In 2016 and 2017, a second logger was deployed at each of the streams. Loggers are deployed in each stream during the summer, between Lake Superior and the first barrier. Data from the two loggers are analyzed separately for each week and the lower maximum weekly trimean temperature from each stream is used.

Terra Nova National Park employs fixed station pressure/temperature loggers to continuously monitor stream water temperatures over the entire summer at designated stream study sites.

This dataset measures the temperature of the soil at 4 depths: 1 meter, 5 meters, 10 meters and 14 meters. This permafrost data is collected using Hobodata loggers that collect data at 12 hour intervals throughout the year. Field maintenance and station updates occur annually in late March and early April. The average temperature in the Arctic has increased at almost twice the rate of the rest of the planet in the past few decades, and the Arctic is now experiencing some of the most rapid and severe change on Earth.

Stream thermal regime has important consequences for aquatic organisms, and is sensitive to climate and land use. The Park is monitoring thermal regimes at 10 sites annually from spring to fall using temperature loggers. The water temperature is recorded hourly and these data used to assess the suitability of the thermal environment of streams for Brook Trout.