National Oceanic and
Atmospheric Administration
United States Department of Commerce


Research Floats Surface in the Chukchi Sea Providing Valuable Data on Under Sea-Ice Conditions

After spending 8 months under water and ice, two of NOAA’s three Arctic-deployed pop-up floats have successfully surfaced in the Chukchi Sea and are transmitting data on temperature, pressure, photosynthetic active radiation (PAR), and chlorophyll fluorescence. These data are from measurements taken while the float is anchored to the seafloor, while it rises through the water column, and while it is trapped under the ice at the water-ice boundary.  

Map of the Chukchi Sea showing the track of a float as well as graphs of increasing temperature and chlorophyll concentration increasing from May to June with cloudy brown/green and clear images of under the ice.

During the first Chukchi deployment, floats resurfaced under a sheet of floating ice (ice floe), monitored and tracked the ice region for almost two months and detected an under-ice algae bloom (Stabeno et. al, 2020).  The bottom row shows the captured images with no bloom and/or algae.


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