Other Data Paper Zone II Versions ZH3 Vol 6 (3) 2021
A dataset of tree-ring-based regional precipitation reconstruction in the United States during the last millennium
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Abstract & Keywords
Abstract: It’s of great significance to reconstruct a dataset of high-resolution regional precipitation in the last millennium, particular for understanding the regional differences of climate change at a decadal–centennial scale. Using 1,258 tree-ring width (TRW) index chronologies in the United States, together with the instrumental monthly precipitation data from 1901 to 2015, we analyzed in the dataset the correlation between TRW and annual (previous October to current September) precipitation variation as well as the spatial pattern of precipitation variation over the US. And on this basis, we divided the US into 12 regions with unique feature of precipitation variation, and selected 632 TRW index chronologies with significantly positive correlation to regional annual precipitation and earlier than 1750 CE. Finally, we reconstructed 12 regional annual precipitation series by using the calibration equations for each region at different periods. The results show that the explained variance of the calibration equations to 12 annual regional precipitation variability ranges from 28.96% to 91.91% and the average value is 58.34%. In the 12 regional annual precipitation series, there are four longer than 1,000 years, three between 500 and 1,000 years, and five between 290 and 500 years. The longest one is for the southern Rocky Mountains, about 1,858 years from 122 CE to 1979 CE, and the shortest one is for the Great Lakes region in northeastern US, about 291 years from 1689 CE to 1979 CE. This dataset consists of the reconstructed annual precipitation series in 12 regions and their error ranges, as well as other statistics, such as the predicted R-square and number of samples for calibration. The dataset can provide data for studying the differences in precipitation variation between the US and other areas of the Northern Hemisphere (East Asia, Europe, etc.) at a decadal-centennial scale, and contribute to the research on its teleconnection with climate mode.
Keywords: the United States; regional precipitation; integrated reconstruction; tree-ring width index chronologies
Dataset Profile
TitleA dataset of tree-ring-based regional precipitation reconstruction in the United States during the last millennium
Data authorsBAI Mengxin, HAO Zhixin, ZHANG Xuezhen, ZHENG Jingyun
Data corresponding authorZHENG Jingyun (zhengjy@igsnrr.ac.cn)
Time rangeThe longest series spans from 122 to 1979 CE and the shortest spans from 1689 to 1979 CE. Among them, four reconstructed precipitation series are longer than a millennium, and three series are between 500 and 1,000 years, and the other five series are between 290 and 500 years.
Geographical scopeThe Continental United States (excluding the Alaska State and the Hawaii State), 25.12°N–49.38°N, 66.97°W–124.71°W, covering 48 states.
Data volume0.81 MB
Data format*.xlsx
Data service system<http://www.dx.doi.org/10.11922/sciencedb.j00001.00254>
Sources of fundingNational Key Research and Development Program of China (2017YFA0603300)
Dataset compositionThe dataset consists of one data file, including 12 tables named after the regions in the US with unique features of precipitation variation. Each table contains years, reconstructed regional precipitation and the validity and uncertainty parameters of the corresponding reconstruction results, including the predicted R-square, the total number of samples and the number of samples for calibration, the error reduction value and effective coefficient within the validation periods 1920–1949 and 1950–1979 respectively, and the 95% confidence interval of reconstructed precipitation.
Article and author information
Bai Mengxin
Hao Zhixin
Zhang Xuezhen
Zheng Jingyun
Publication records
Released: May 13, 2021 ( VersionsZH2
Published: Sept. 29, 2021 ( VersionsZH3