Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00560346" target="_blank" >RIV/86652079:_____/22:00560346 - isvavai.cz</a>

Výsledek na webu

<a href="https://cp.copernicus.org/articles/18/1849/2022/" target="_blank" >https://cp.copernicus.org/articles/18/1849/2022/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/cp-18-1849-2022" target="_blank" >10.5194/cp-18-1849-2022</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees

Popis výsledku v původním jazyce

Stable hydrogen and carbon isotope ratios of wood lignin methoxy groups (delta C-13(LM) and delta H-2(LM) values) have been shown to be reliable proxies of past temperature variations. Previous studies showed that delta H-2(LM) values even work in temperate environments where classical tree-ring width and maximum latewood density measurements are less successful for climate reconstructions. Here, we analyse the annually resolved delta C-13(LM) values from 1916-2015 of four beech trees (Fagus sylvatica) from a temperate site near HohenpeiBenberg in southern Germany and compare these data with regional-to continental-scale climate observations. Initial delta(13)C(LM )values were corrected for the Suess effect (a decrease of delta C-13 in atmospheric CO2) and physiological tree responses to increasing atmospheric CO2 concentrations considering a range of published discrimination factors. The calibration of delta C-13(LM) chronologies against instrumental data reveals the highest correlations with regional summer (r = 0.68) and mean annual temperatures (r = 0.66), as well as previous-year September to current-year August temperatures (r = 0.61), all calculated from 1916-2015 and reaching p < 0.001. Additional calibration trials using detrended delta C-13(LM) values and climate data (to constrain effects of autocorrelation on significance levels) returned r(summer) = 0.46 (p < 0.001), r(annual) = 0.25 (p < 0.05) and r(prev.September-August) = 0.18 (p > 0.05). The new delta C-13(LM) chronologies were finally compared with the previously produced delta H-2(LM) values of the same trees in order to evaluate the additional gain of assessing past climate variability using a dual-isotope approach. Compared to delta C-13(LM), delta H-2(LM) values correlate substantially more strongly with large-scale temperatures averaged over western Europe (r(prev.September-August) = 0.69), whereas only weak and mainly insignificant correlations are obtained between precipitation and both isotope chronologies (delta C-13(LM) and delta H-2(LM) values). Our results indicate the great potential of using delta C-13(LM) values from temperate environments as a proxy for local temperatures and, in combination with delta H-2(LM) values, to assess regional- to sub-continental scale temperature patterns.

Název v anglickém jazyce

Climate signals in stable carbon and hydrogen isotopes of lignin methoxy groups from southern German beech trees

Popis výsledku anglicky

Stable hydrogen and carbon isotope ratios of wood lignin methoxy groups (delta C-13(LM) and delta H-2(LM) values) have been shown to be reliable proxies of past temperature variations. Previous studies showed that delta H-2(LM) values even work in temperate environments where classical tree-ring width and maximum latewood density measurements are less successful for climate reconstructions. Here, we analyse the annually resolved delta C-13(LM) values from 1916-2015 of four beech trees (Fagus sylvatica) from a temperate site near HohenpeiBenberg in southern Germany and compare these data with regional-to continental-scale climate observations. Initial delta(13)C(LM )values were corrected for the Suess effect (a decrease of delta C-13 in atmospheric CO2) and physiological tree responses to increasing atmospheric CO2 concentrations considering a range of published discrimination factors. The calibration of delta C-13(LM) chronologies against instrumental data reveals the highest correlations with regional summer (r = 0.68) and mean annual temperatures (r = 0.66), as well as previous-year September to current-year August temperatures (r = 0.61), all calculated from 1916-2015 and reaching p < 0.001. Additional calibration trials using detrended delta C-13(LM) values and climate data (to constrain effects of autocorrelation on significance levels) returned r(summer) = 0.46 (p < 0.001), r(annual) = 0.25 (p < 0.05) and r(prev.September-August) = 0.18 (p > 0.05). The new delta C-13(LM) chronologies were finally compared with the previously produced delta H-2(LM) values of the same trees in order to evaluate the additional gain of assessing past climate variability using a dual-isotope approach. Compared to delta C-13(LM), delta H-2(LM) values correlate substantially more strongly with large-scale temperatures averaged over western Europe (r(prev.September-August) = 0.69), whereas only weak and mainly insignificant correlations are obtained between precipitation and both isotope chronologies (delta C-13(LM) and delta H-2(LM) values). Our results indicate the great potential of using delta C-13(LM) values from temperate environments as a proxy for local temperatures and, in combination with delta H-2(LM) values, to assess regional- to sub-continental scale temperature patterns.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/EF16_019%2F0000797" target="_blank" >EF16_019/0000797: SustES - Adaptační strategie pro udržitelnost ekosystémových služeb a potravinové bezpečnosti v nepříznivých přírodních podmínkách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Climate of the Past

ISSN

1814-9324

e-ISSN

1814-9332

Svazek periodika

18

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

17

Strana od-do

1849-1866

Kód UT WoS článku

000840411200001

EID výsledku v databázi Scopus

2-s2.0-85136804412