标题: Experiments of the efficacy of tree ring blue intensity as a climate proxyin central and western China

作者: Zheng, YH (Zheng, Yonghong); Shen, HF (Shen, Huanfeng); Abernethy, R (Abernethy, Rory); Wilson, R (Wilson, Rob)

来源出版物: BIOGEOSCIENCES  卷: 20  期: 16  页: 3481-3490  DOI: 10.5194/bg-20-3481-2023  出版年: AUG 21 2023  

摘要: To investigate the potential value of tree ring blue intensity as a robust climate proxy in central and western China, four species from five sites were assessed. As well as latewood inverted blue intensity, we also examined earlywood blue intensity. To explore the sensitivity of using different extraction parameter settings using the software CooRecorder, seven percentile ( P) variant settings for earlywood blue intensity and latewood inverted blue intensity were used, namely P 50 : 50, P 60 : 40, P 70 : 30, P 80 : 20, P 85 : 15, P 90 : 10, and P 95 : 5. Age-dependent spline was used for all, and the positive trends were not retained. Correlation analysis was applied between the tree ring parameter chronologies and monthly/seasonal mean temperature, precipitation, and self-calibrated Palmer drought severity index variables. Linear regression was also used to further highlight the potential of developing climate reconstructions using these species. Only subtle differences were found between the different percentile extraction variants. As has been shown for many other Northern Hemisphere studies, latewood inverted blue intensity expresses a strong positive relationship with growing-season temperatures (the two southern sites explain almost 56% of the temperature variance when combined). However, the low latitude of these sites shows an exciting potential for regions south of 30ffi N that are traditionally not targeted for temperature reconstructions. Earlywood blue intensity also shows good potential to reconstruct hydroclimate parameters in some humid areas.

KeyWords Plus: TEMPERATURE RECONSTRUCTION; LATEWOOD DENSITY; DENDROCLIMATOLOGY; CHRONOLOGIES; HEMISPHERE; REVEAL; WIDTH; AREA

地址: [Zheng, Yonghong; Shen, Huanfeng] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.

[Zheng, Yonghong; Abernethy, Rory; Wilson, Rob] Univ St Andrews, Sch Earth & Environm Sci, St Andrews KY16 9AL, Scotland.

通讯作者地址: Wilson, R (通讯作者)，Univ St Andrews, Sch Earth & Environm Sci, St Andrews KY16 9AL, Scotland.

电子邮件地址: rjsw@st-andrews.ac.uk

影响因子：4.9