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Ecosystems Dynamics & Assessment : Current Conditions (Spring 2018)

Fall Temperature from the Survey

The thermal conditions at the bottom of the water column are extremely important in defining the habitats for the majority of resource species. Unlike sea surface temperatures that can be measured synoptically with satellite telemetry, bottom temperatures must be measured directly from ship surveys and other means. Thus, we often have incomplete spatial and temporal sample coverage to describe bottom temperature conditions. Recently, scientists at the NEFSC developed an interpolation approach that provides a more accurate depiction of spring and fall bottom temperatures. The time series of October time frame temperatures suggest there has been significant warming thought the ecosystem; all the ecoregion had significant time series trends (see figure; red dashed line marks 2017 data point).

George Bank fall bottom temperature trends
Georges Bank
Gulf of Maine fall bottom temperature trends
Gulf of Maine
Middle Atlantic Bight fall bottom temperature trends
Middle Atlantic Bight
Northeast Shelf fall bottom temperature trends
Northeast Shelf
Scotian Shelf fall bottom temperature trends
Scotian Shelf
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