Like other temperature reconstructions performed since 2001 (see chart ), it reveals increased variability than the initial hockey stick. Some show far more variability leading to the 20th century than the hockey stick, but none imply it has been warmer at any given time in the previous 1000 years than at the last part of this 20th century. But that also informs me that a good deal of young scientists value communication and outreach even more than we did previously. The "hockey stick" chart was the result of this very first extensive effort to reconstruct the average northern hemisphere temperature within the previous 1000 decades, based on several indicators of past temperatures, such as tree rings. Yet again, though, the key decision is exactly the same: it's warmer now than it's been for 1000 years. 1998, 1999) was that the late 20th century warmth in the Northern Hemisphere was unprecedented during at least the previous 1000 years. Arsenal's run in is equally tough to their introduction, confronting Tottenham and Liverpool within their past four games.