Arctic Climate Impact Tour 2011

Nick Toberg and Till Wagner went to the North Greenland Sea in September 2011, to measure the properties and thickness of the sea ice aboard the Greenpeace ship ARCTIC SUNRISE - to document their work they started writing this blog.

As the ice was reaching a new record low (see the NSIDC sea ice extent graph) this year, we went back to carry on our work.

Last year, we were joined by SCANLAB, who performed 3d laser scans of the surface of the ice. They are on board again this year, but now we're getting the bottom as well: Hanumant Singh from the Woods Hole Oceanographic Institution is joining with his team to get 3d profiles of the underside of the ice.

So now, for a historic first, we got the whole 3d picture of sea ice floes in the Arctic Ocean.

On board as well this year was the master of it all, our group leader Professor Peter Wadhams.

After the Arctic Climate Impact Tour, Peter and Till travelled to West Greenland and took part in expedition Operation Iceberg - a BBC funded science project that was subsequently featured in the 2 part BBC 2 documentary Operation Iceberg.

Science on Board

Ok, so our suite of scientific measurements has been finalized at last.
Here's a list of instruments:

1. 3D Laser Scanner - this really is the centerpiece of the project, it will basically take the surface of the Arctic as it is and put it on your computer in 3D.

2. Two GoPro Cameras - to be mounted on the helicopter and take aerial photos of the survey sites (which can be stitched together and produce huge, beautiful mosaics)

3. Magnaprobe  - measuring snowdepth and giving GPS readings

4. Total Station - to tie in the snowdepth readings with the scanner data, and produce low resolution surveys of the ice topography

5. Drills - electric and petrol driven, to measure ice thickness

6. Corer - to take samples of the ice, which tell us how old it is, what it's salinity, density and other properties are



The following is taken from an email I sent to Malcolm Davidson of ESA (European Space Agency) and colleagues.

Detailed surveying of first year and multi-year pressure ridges. In order to do so we are taking a 3D laser scanner with us (+ an expert to work it) which will hopefully produce 3D profiles of ridges to a mm resolution. This will be supplemented with extensive snowdepth readings (using a magnaprobe). Snowdepths and scanner data will be tied together using a Leica Total Station. We're also planning on obtaining thicknesses by drilling (as much as feasible). To get an  idea  of the properties of ice and snow we'll be taking cores (mainly of the undeformed ice sheets on either side of the surveyed ridges). Finally we'll use the Greenpeace helicopter and imaging technology supported by WHOI to produce mosaicked aerial imagery of the ice surveyed.
We're planning on performing similar measurements on meltponds. The ice conditions will determine whether and when we'll be focusing on ridges/ melt ponds.


Note that this is a very optimistic plan, assuming we'll be having 4 weeks of sun, perfectly functioning equipment, endless battery power and a never ending supply of helping hands.