"I spend a lot of time in the woods, and I'm not concerned that what we're seeing this year is particularly unusual," said Frank Lowenstein, deputy director of the New England Forestry Foundation. Lowenstein, who is also a member of the Environmental Studies Department at Brandeis University, said shifting climate patterns is only one part of what causes trees to change early. "We are definitely seeing weather patterns shifting in the Northeast," Lowenstein said. "We're getting more rainfall, specifically heavy rainfall."