Some probably is from continued cyclical warming out of the little ice age. (climate-skeptic.com)
Also, as linked in the September 24, TWTW, the Antarctic Peninsula appears to undergo cyclical warming and cooling. (wattsupwiththat.com)
Predicting the impact of climate change on ecological communities is tricky, but predicting the impact of El Niño, the cyclical warming in the Pacific Ocean that affects temperature and rainfall around the globe, is even trickier. (discovermagazine.com)