Reconstruction Dataset of Yearly July-August Mean Temperature from Tree-ring Maximum Latewood Density of Pinus sylvestris var. mongolica at North Greater Khingan Mountains (1781-2013)

LI Mingqi1LAN Yu2

1 Key Laboratory of Land Pattern and Simulation，Institute of Geographic Sciences and Natural Resources Research，Chinese Academy of Sciences，Beijing 100101，China2 Guangdong Meteorological Observatory，Guangzhou 510640，China

DOI:10.3974/geodb.2022.04.02.V1

Published:Apr. 2022

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Key Words：

tree-ring,maximum latewood density,North Greater Khingan Mountains,Pinus sylvestris var. mongolica,temperature reconstruction,1781-2013

Abstract：

61 tree-ring cores (10 mm) from 28 Hailar pines (Pinus sylvestris var. mongolica) were collected at the upper tree lines (51.79°N, 123.08°E, 950 m a.s.l) from the Huzhong National Natural Preserve in North Greater Khingan Mountains in september 2013. The cores were visually cross-dated after they were dried and sanded. 39 tree-ring cores from 22 trees were selected for densitometry analysis. The maximum latewood density (MXD) was obtained by DENDRO 2003 tree-ring densitometry. Each MXD series was fit using 80-year cubic smoothing spline to remove the non-climatic trends. Each detrended index series was calculated as the ratio of the tree-ring value to the corresponding spline curve value of a given year. All index series of tree-ring data from the site were combined into the site chronology using a bi-weight robust mean. Based on the relationship between MXD chronology and climate variables from Mohe meteorological station, July-August mean temperature was reconstructed back to AD 1781 for the North Greater Khingan Mountains. The reconstruction explained 31.1% of the variance in the instrumental period (AD 1959-2013). The dataset includes: (1) geolocation of the sampling site; (2) tree-ring MXD standard chronology; (3) the reconstructed July-August temperature from 1781 to 2013 in North Greater Khingan Mountains, and 11-year smoothing average data; (4) statistics of 39 raw tree-ring MXD measurements. The dataset is archived in .shp and .xlsx data formats, and consists of 9 data files with data size of 27.2 KB (Compressed to one single file with 24 KB).Browse

Foundation Item：

Ministry of Science and Technology of P. R. China (2017YFA0603302)；

Data Citation：

LI Mingqi, LAN Yu. Reconstruction Dataset of Yearly July-August Mean Temperature from Tree-ring Maximum Latewood Density of Pinus sylvestris var. mongolica at North Greater Khingan Mountains (1781-2013)[J/DB/OL]. Digital Journal of Global Change Data Repository, 2022. https://doi.org/10.3974/geodb.2022.04.02.V1.

LI Mingqi, LAN Yu. A July–August mean-temperature dataset reconstructed based on the maximum late-wood density of hailar pine in the North Greater Khingan Mountains (1781–2013) [J]. Journal of Global Change Data & Discovery, 2022, 6(3): 395-401

Data Product: