The jet stream is weakening and slowing and leading to new blocking
patterns such as the one that converted feeble and unimportant hurricane Sandy into the largest
single storm system ever seen or measured on Earth..
We can do a hundred different measurements on a
single little slab of ice and from that we can tell all sorts of things; Temperature, precipitation,
storm patterns, where the
storm came from, industrial pollutants, forest fires, volcanoes, on and on and on.