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- Title
Characteristics of temperature change in China over the last 2000 years and spatial patterns of dryness/wetness during cold and warm periods.
- Authors
Ge, Quansheng; Liu, Haolong; Ma, Xiang; Zheng, Jingyun; Hao, Zhixin
- Abstract
This paper presents new high-resolution proxies and paleoclimatic reconstructions for studying climate changes in China for the past 2000 years. Multi-proxy synthesized reconstructions show that temperature variation in China has exhibited significant 50-70-yr, 100-120-yr, and 200-250-yr cycles. Results also show that the amplitudes of decadal and centennial temperature variation were 1.3°C and 0.7°C, respectively, with the latter significantly correlated with long-term changes in solar radiation, especially cold periods, which correspond approximately to sunspot minima. The most rapid warming in China occurred over AD 1870-2000, at a rate of 0.56° ± 0.42°C (100 yr); however, temperatures recorded in the 20th century may not be unprecedented for the last 2000 years, as data show records for the periods AD 981-1100 and AD 1201-70 are comparable to the present. The ensemble means of dryness/wetness spatial patterns in eastern China across all centennial warm periods illustrate a tripole pattern: dry south of 25°N, wet from 25°-30°N, and dry to the north of 30°N. However, for all centennial cold periods, this spatial pattern also exhibits a meridional distribution. The increase in precipitation over the monsoonal regions of China associated with the 20th century warming can primarily be attributed to a mega El Ni˜no-Southern Oscillation and the Atlantic Multidecadal Oscillation. In addition, a significant association between increasing numbers of locusts and dry/cold conditions is found in eastern China. Plague intensity also generally increases in concert with wetness in northern China, while more precipitation is likely to have a negative effect in southern China.
- Subjects
GLOBAL temperature changes; CLIMATE change; PALEOCLIMATOLOGY; SEASONAL temperature variations; SOLAR radiation
- Publication
Advances in Atmospheric Sciences, 2017, Vol 34, Issue 8, p941
- ISSN
0256-1530
- Publication type
Article
- DOI
10.1007/s00376-017-6238-8