See also our Arctic sea ice graphs overview page, our Arctic sea ice videos page and our Arctic
ice mass balance buoys overview page.
Google Maps / Earth format data and temperature profiles for all active
ice mass balance buoys.
Ice mass balance buoys deployed in the Beaufort Sea as part of the Office of Naval Research (ONR) Marginal Ice Zone Program indicate that surface temperatures have reached the melting point, at least intermittently, in the region, with some surface melt beginning in the southern part of the Beaufort, but little or no melt farther north (Figure 10), http://www.apl.washington.edu/project/project.php?id=miz.
The most recent data from
ice mass balance buoys in Storfjroden, Svalbard and on iceberg - fast ice in Fram Strait show that the melt season has started.
The figure below shows the total amount of surface (red) and bottom (yellow) melt through 1 August 2008 measured at seven sea
ice mass balance buoys.
The most recent ice data, 10 June 2013, from a SAMS
ice mass balance buoy installed in the fast ice in Inglefieldbukta (N 77 ° 54», E 18 ° 17») reported an ice thickness of about 88 cm and snow depth 20 cm.
This is corroborated by ice ablation data from
an ice mass balance buoy (Figure 2) that was deployed in April near Barrow and has moved through the Chukchi Sea.
Only a detailed analysis of buoy data and field observations will help resolve this question, but
an ice mass balance buoy placed on 1.4 meter thick first - year ice north of Barrow in April has managed to survive into the late melt season, drifting 1,000 kilometers to the North over the course of the summer.
Advanced melt is in line with observations of early melt - onset at Barrow and confirmed by
an ice mass balance buoy in multiyear ice which has lost 0.6 m of ice at this early stage of melt (Figure 3, top marker).
Not exact matches
Estimates of top surface and bottom melt from
ice mass -
balance buoy observations were provided by Don Perovich's team.
Figure 4 shows the present (13 August 2008) surface condition as evidenced by the web camera image from the NPEO Automated Drifting Station, the location of the
ice -
mass -
balance buoy installation nearest Fram Strait.
Here, considerable value can be derived from ship - based observations, aerial overflights, and drifting (
mass -
balance)
buoys that provide a more accurate picture of the distribution of different
ice types.
In this context,
mass -
balance buoy data (including — as a first — a
buoy in first - year
ice) provide a good means of assessing the progression of bottom and surface melt, potentially allowing conclusions about the disposition of solar radiation.