Abstract
Cores of Pinus tabulaformis from Tianshui were subjected to densitometric analysis to obtain mean earlywood density data. Climate response analysis indicates that May–June maximum temperature is the main factor limiting the mean earlywood density (EWD) of Chinese pine trees in the Shimen Mountains. Based on the EWD chronology, we have reconstructed May–June maximum temperature 1666 to 2008 for Tianshui, north central China. The reconstruction explains 40.1% of the actual temperature variance during the common period 1953–2008. The temperature reconstruction is representative of temperature conditions over a large area to the southeast and northwest of the sampling site. Preliminary analysis of links between large-scale climatic variation and the temperature reconstruction shows that there is a relationship between extremes in spring temperature and anomalous atmospheric circulation in the region. It is thus revealed that the mean earlywood density chronology of Pinus tabulaformis has enough potential to reconstruct the temperature variability further into the past.
Highlights
The meteorological station records in most parts of the world show that temperatures have been increasing over the 20th century, and this global warming has been paid much attention to by scientists and the public [1]
We developed a mean earlywood density (EWD) chronology from tree rings of Chinese pine in the Shimen Mountains, Tianshui, north central China
When precipitation signal was removed by the partial correlation, May–June maximum temperature still have high correlation (r = 0.51, P,0.01) with EWD
Summary
The meteorological station records in most parts of the world show that temperatures have been increasing over the 20th century, and this global warming has been paid much attention to by scientists and the public [1]. To further improve the spatial and temporal coverage of tree-ring network in Asia, more tree-ring chronologies are still needed. Because of their high correlation, high resolution, and reliability, latewood densities (maximum density and mean latewood density) from the high latitude and altitude areas of the Northern Hemisphere are widely used for the purpose of reconstructing previous warm season temperature regimes [4,13,16,17]. The high temperature during the growing season may play a very important role in accumulating wood density during the radial developing process of tree growth under cold and wet environment. We need to find other new proxies to reconstruct temperature
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
