parts of the region, sea surface temperatures and levels have also risen.
“Climate researchers had known for some time that various trends were emerging in the long-term data sets for things like temperature, precipitation, days with snow on the ground, length of growing season, as well as bloom dates,” said Wake, a research associate professor at the Climate Change Research Center in UNH’s Institute for the Study of Earth, Oceans and Space.
“Working with researchers from Cornell, US Geological Survey, and others, we’ve been able to bring this data together in one place for the first time, and analyze it for consistent trends.” Although the report states that climate has always changed and always has will, what is unique in modern times is that “human activities are now a significant factor causing climate to change.” The report points out that while it cannot be conclusively proven from the data that all of the regional warming is due to human actions, “the warming is fully consistent with what we would expect from global warming caused by increasing greenhouse gas concentrations.”
“Many of the indicators associated with end-of-winter or the beginning of the growing season show very uniform movement – about a week – earlier. This is consistent with predictions, and it is scientific evidence that we don’t need to wait decades or years to see dramatic climate change – it’s happening all around us right now,” Markham says.
One of the contributors to the indicators report, Dr. David Wolfe from the Horticulture Department at Cornell University, collected biological data on bloom dates for apples, grapes, and lilacs.
“Collectively, analyses for the northeastern U.S. indicate that, on average, lilacs are blooming about four days earlier, and apple and grapes are blooming about eight days earlier than they were half a century ago,” Wolfe noted in his report, while cautioning that the earlier start to the gro
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