Twentieth-century summer warmth in northern Yakutia in a 600-year context
We report unusual twentieth-century early-summer warmth recorded by larch tree-rings at the north ern tree-line in far northeastern Eurasia (Yakutia). The tree-ring series are strongly replicated and well suited to the detection of fluctuations on interannual to century timescales. They are strongly...
| Published in: | The Holocene |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
SAGE Publications
1999
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1191/095968399671321516 http://journals.sagepub.com/doi/pdf/10.1191/095968399671321516 |
| Summary: | We report unusual twentieth-century early-summer warmth recorded by larch tree-rings at the north ern tree-line in far northeastern Eurasia (Yakutia). The tree-ring series are strongly replicated and well suited to the detection of fluctuations on interannual to century timescales. They are strongly correlated with local instrumental temperature data. Mean early-summer temperature in the twentieth century significantly exceeds that of any period of the same length since ad 1400. A century-scale trend, which commences in the midnineteenth century, is superimposed on interannual and decadal fluctuations, for example a marked cooling since 1978. While many of the 20 coolest early summers in the reconstruction occur within a few years after major explosive volcanic eruptions from low-latitude volcanoes, several of the 20 warmest early summers followed major explosive eruptions from high-latitude volcanoes. |
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