Tree-ring reconstruction of June-July mean temperatures in the northern Daxing’an Mountains, China

Abstract

In this study, the mean temperature of June to July was reconstructed for the period of 1880 to 2014 by using the Larix gmelinii tree-ring width data for the Mangui region in the northern Daxing’an Mountains, China. The reconstruction accounts for 43.6% of the variance in the temperature observed from AD 1959–2014. During the last 134 years, there were 17 warm years and 17 cold years, which accounted for 12.7% of the total reconstruction years, respectively. Cold episodes occurred throughout 1887–1898 (average value is 14.2°C), while warm episodes occurred during 1994–2014 (15.9°C). Based on this regional study, the warmer events coincided with dry periods and the colder events were consistent with wet conditions. The spatial correlation analyses between the reconstructed series and gridded temperature data revealed that the regional climatic variations were well captured by this study and the reconstruction represented a regional temperature signal for the northern Daxing’an Mountains. In addition, Multi-taper method spectral analysis revealed the existence of significant periodicities in our reconstruction. Significant spectral peaks were found at 29.7, 10.9, 2.5, and 2.2 years. The significant spatial correlations between our temperature reconstruction and the El Niño–Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO) and Solar activity suggested that the temperature in the Daxing’an Mountains area indicated both local-regional climate signals and global-scale climate changes.

Historical temperature variability in a representative high-latitude region in the monsoon-continental climate transition zone in China

“…The WC borders the study area and has a moderate-temperate continental monsoon plateau mountain climate. Figure 7b shows the results of tree-ring reconstruction of the mean temperature in June and July from 1880 to 2014 in a region in the northern part of the Daxing'an Mountains (denoted as DXA) (Jiang et al 2020). Figure 7c shows the annual mean temperature of the study area from 1845 to 2016 reconstructed based on the tree-ring width chronology of Korean spruce in a representative area of the transition zone (denoted as GDD).…”

Spatial Variation and Temporal Instability in the Growth/Climate Relationship of White Birch (Betula platyphylla Suk) in the Changbai Mountain, China

“…There is increasing evidence that since the 1970s, the northeast China region has experienced rapid warming, leading to a warming and drying trend in this region [17][18][19][20]. The Northeast Forest is one of the three major state-owned forest areas in China, which is extremely sensitive to climatic and environmental changes [21][22][23][24], and the relationship of its dynamics with climatic factors has been receiving more and more attention.…”