Makes the long, challenging fieldwork days in cold weather conditions productive and fun. Yesterday we split up into two teams to tackle our various components of the plan. Chris, Allen, Ronnie, and Anne attacked our two manipulation lake sites. One lake is currently a floating ice lake and the other a grounded ice lake. Our plan over the duration of the new ALISS project is to convert the floating ice lake to a grounded ice lake and the grounded ice lake to a floating ice lake. Chris's team spent the day installing sensors and instruments to measure the conditions prior to the conversion. Andy, Andy, and Ben spent the day doing NMR surveys on these two lakes to image the permafrost table below the lakes prior to the manipulation. Team Andy also did NMR on two other lakes to capture a range of lake depths and lake ages. All in all a really productive day. We wrapped up the fieldwork by 11pm and then enjoyed a Turducken for dinner around midnight before calling it a day.