Run 49:00 [3] 9.5 km (5:09 / km)
The post-Easter cold looks like a reality; one of those ones which isn't showing especially dramatic cough-and-splutter symptoms but is still rather draining. In the context of a run, this meant moving along OK on the level, more or less, but weakness at any encounter with a contour (to an even greater extent than has been typical this year). I will want to be in somewhat better shape to contemplate taking on Saturday's course.
Some during-run thinking may not have helped the process of being in a positive mood. Quite a few studies have come out in the last few weeks in support of the general proposition that reduced Arctic sea-ice cover is contributing to Northern Hemisphere circulation changes which result in more northerly and easterly winds (and hence colder winter temperatures) in northern Europe and eastern and central North America, and unusual southerly flow/warmer temperatures in Greenland, the Canadian Arctic islands and central and east Asia. (As some readers will know, March 2013 has been a particularly spectacular example of this). Whilst certain bits of the media have been getting excited about British snow, the implications of accelerated Greenland warming, which I realised during the course of this run, are scarier - at the moment, 2 degrees of global warming is generally accepted as the upper limit beyond which there is a high risk of ultimate collapse of the Greenland ice sheet, but if Greenland is warming faster than other high-latitude areas of the Northern Hemisphere, that global upper limit may be quite a bit lower than 2 degrees. Staying below 2 degrees is already hard; staying below, say, 1.5 will be a lot harder.