摘要
Three tree-ring rainfall reconstructions from China and Korea are used in this paper to investigate the East Asian summer monsoon-related precipitation variation over the past 160 years. Statistically, there is no linear correlation on a year-by-year basis between Chinese and Korean monsoon rainfall, but region-wide synchronous variation on a decadal-scale was observed. More rainfall intervals were 1860-1890, 1910-1925, and 1940-1960, and dry or even drought peri-ods were 1890-1910, 1925-1940, and 1960-present. Reconstructions also display that the East Asian summer monsoon precipitation suddenly changed from more into less around mid-1920. These tree-ring precipitation records were also confirmed by Chinese historical dry-ness/wetness index and Korean historical rain gauge data.
Three tree-ring rainfall reconstructions from China and Korea are used in this paper to investigate the East Asian summer monsoon-related precipitation variation over the past 160 years. Statistically, there is no linear correlation on a year-by-year basis between Chinese and Korean monsoon rainfall, but region-wide synchronous variation on a decadal-scale was observed. More rainfall intervals were 1860-1890, 1910-1925, and 1940-1960, and dry or even drought peri-ods were 1890-1910, 1925-1940, and 1960-present. Reconstructions also display that the East Asian summer monsoon precipitation suddenly changed from more into less around mid-1920. These tree-ring precipitation records were also confirmed by Chinese historical dry-ness/wetness index and Korean historical rain gauge data.
基金
the Knowledge Innovation Programof Chinese Academy of Sciences(Grant Nos.KZCX1-10-02,KZCX3-SW-120,KZCX2-108,KZCX2-SW-118)
the National Natural Science Foundation of China(Grant Nos.49874170,90102017,40023003,40121303)
the Ministry of Science and Technology of China(Grant No.NKBRSF G1990434001)
Korea Science and Engineering Foundation(Grant No.KOSEF 985-0400-002-2).
