Chinese Academy of Meteorological Sciences, Beijing 100081, China;
Training Centre of China Meteorological Administration, Beijing 100081, China;
Joint Institute of Marine and Atmospheric Research, University of Hawaii, Honolulu,HI 96822, USA;
Pacific Fisheries Environmental Laboratory, NOAA/NMFS, Pacific Grove, CA 93950;
Pacific Fisheries Environmental Laboratory, NOAA/NMFS, Pacific Grove, CA 93950, USA;
Pacific Fisheries Environmental Laboratory, NOAA/NMFS, Pacific Grove, CA 93950, USA;
abrupt change; 8000 years; precipitation reconstruction; tree ring; Western USA;