Pacific-Atlantic Ocean influence on wildfires in northeast China (1774 to 2010)

National Natural Science Foundation of China [30970481, 41471168]; China National Key Research and Development Program [2016YFA0600800]; Program for Changjiang Scholars and Innovative Research Team in University [IRT15R09]; China Scholarship Council; Rocky Mountain Tree-Ring Research, Inc.; National Science Foundation (NSF) Accelerating Innovation Research (AIR) program; NSF Hazard SEES project