Last time I wrote, we had just lowered our pump down our borehole in the hopes of raising it back out again. A lot's happened since then.

Mostly, it's been a tug-of-war between us and the pump. First the pump wouldn't start. Seeing as the thing was ...

Among our first tasks here at Summit Station is to pump fluid out of a borehole. Typically, when climate scientists and glaciologists drill for ice cores, they backfill the holes with fluid for a couple of reasons.

Without any fluid in the holes, which can be miles deep but only ...

Today is my second day at Summit Station, which is right in the middle of the country, up at 10,530 ft on the ice sheet.

I'm currently snuggled in my sleeping bag rated for -40 deg F, in my tent designed for polar conditions. It's pretty cozy ...

Arrived today in Kangerlussuaq, Greenland. I’ll be here at least until Sunday. Then I’ll be headed up to Summit Camp, where there will be about 45 other people.

The town of Kangerlussuaq engulfs an enormous airfield. The town and airfield are surrounded by shockingly straight mountain crags. The ...