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Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China

Shuyuan Kang Orcid Logo, Neil Loader Orcid Logo, Jianglin Wang Orcid Logo, Chun Qin, Jingjing Liu, Miao Song

Forests, Volume: 13, Issue: 4, Start page: 492

Swansea University Author: Neil Loader Orcid Logo

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DOI (Published version): 10.3390/f13040492

Abstract

Carbon and oxygen isotope ratios (δ13C and δ18O) were measured in annual tree-ring cellulose samples dated from 1756 to 2015 CE. These samples were extracted from Chinese pine (Pinus tabulaeformis Carr.) trees located in a semi-arid region of north-central China. We found that tree-ring δ13C and δ18...

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Published in: Forests
ISSN: 1999-4907
Published: MDPI AG 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa59690
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We found that tree-ring &#x3B4;13C and &#x3B4;18O values both recorded similar climatic signals (e.g., temperature and moisture changes), but found that tree-ring &#x3B4;13C exhibited a stronger relationship with mean temperature, precipitation, average relative humidity, self-calibrating Palmer drought severity index (scPDSI), and standard precipitation evaporation index (SPEI) than &#x3B4;18O during the period 1951&#x2013;2015 CE. The strongest correlation observed was between tree-ring &#x3B4;13C and scPDSI (previous June to current May), which explains ~43% of the variance. The resulting 130-year reconstruction reveals severe drought events in the 1920s and a sustained drying trend since the 1980s. This hydroclimate record based on tree-ring &#x3B4;13C data also reveals similar dry and wet events to other proxy data (i.e., tree-ring width and historical documentation) that have allowed reconstructions to be made across the northern fringe of the Asian summer monsoon region. Our results suggest that both large-scale modes of climate variability (e.g., El Ni&#xF1;o-Southern Oscillation, Pacific Decadal Oscillation, and North Atlantic Oscillation) and external forcing (e.g., solar variability) may have modulated moisture variability in this region. Our results imply that the relationship between tree-ring &#x3B4;18O and local climate is less well-characterized when compared to &#x3B4;13C and may be affected more strongly by the influences of these different atmospheric circulation patterns. 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spelling 2022-04-26T11:09:21.0435274 v2 59690 2022-03-22 Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China 8267a62100791965d08df6a7842676e6 0000-0002-6841-1813 Neil Loader Neil Loader true false 2022-03-22 SGE Carbon and oxygen isotope ratios (δ13C and δ18O) were measured in annual tree-ring cellulose samples dated from 1756 to 2015 CE. These samples were extracted from Chinese pine (Pinus tabulaeformis Carr.) trees located in a semi-arid region of north-central China. We found that tree-ring δ13C and δ18O values both recorded similar climatic signals (e.g., temperature and moisture changes), but found that tree-ring δ13C exhibited a stronger relationship with mean temperature, precipitation, average relative humidity, self-calibrating Palmer drought severity index (scPDSI), and standard precipitation evaporation index (SPEI) than δ18O during the period 1951–2015 CE. The strongest correlation observed was between tree-ring δ13C and scPDSI (previous June to current May), which explains ~43% of the variance. The resulting 130-year reconstruction reveals severe drought events in the 1920s and a sustained drying trend since the 1980s. This hydroclimate record based on tree-ring δ13C data also reveals similar dry and wet events to other proxy data (i.e., tree-ring width and historical documentation) that have allowed reconstructions to be made across the northern fringe of the Asian summer monsoon region. Our results suggest that both large-scale modes of climate variability (e.g., El Niño-Southern Oscillation, Pacific Decadal Oscillation, and North Atlantic Oscillation) and external forcing (e.g., solar variability) may have modulated moisture variability in this region. Our results imply that the relationship between tree-ring δ18O and local climate is less well-characterized when compared to δ13C and may be affected more strongly by the influences of these different atmospheric circulation patterns. In this semi-arid region, tree-ring δ13C appears to represent a better tool with which to investigate historical moisture changes (scPDSI). Journal Article Forests 13 4 492 MDPI AG 1999-4907 carbon isotope; oxygen isotope; Chinese pine; hydroclimate; north-central China 22 3 2022 2022-03-22 10.3390/f13040492 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University This research was funded by the National Natural Science Foundation of China, grant numbers 42130511, 41405085, and 41602192. J.W. acknowledges the support by the Youth Innovation Promotion Association Foundation of the Chinese Academy of Sciences (no. 2018471) 2022-04-26T11:09:21.0435274 2022-03-22T11:12:04.1408516 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Shuyuan Kang 0000-0001-6096-5929 1 Neil Loader 0000-0002-6841-1813 2 Jianglin Wang 0000-0002-9827-9518 3 Chun Qin 4 Jingjing Liu 5 Miao Song 6 59690__23913__0a2734f647f941e3b3264a3030e520ee.pdf 59690.pdf 2022-04-26T11:07:46.5799985 Output 3481455 application/pdf Version of Record true © 2022 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license true eng https://creativecommons.org/licenses/by/4.0/
title Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
spellingShingle Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
Neil Loader
title_short Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
title_full Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
title_fullStr Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
title_full_unstemmed Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
title_sort Tree-Ring Stable Carbon Isotope as a Proxy for Hydroclimate Variations in Semi-Arid Regions of North-Central China
author_id_str_mv 8267a62100791965d08df6a7842676e6
author_id_fullname_str_mv 8267a62100791965d08df6a7842676e6_***_Neil Loader
author Neil Loader
author2 Shuyuan Kang
Neil Loader
Jianglin Wang
Chun Qin
Jingjing Liu
Miao Song
format Journal article
container_title Forests
container_volume 13
container_issue 4
container_start_page 492
publishDate 2022
institution Swansea University
issn 1999-4907
doi_str_mv 10.3390/f13040492
publisher MDPI AG
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
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description Carbon and oxygen isotope ratios (δ13C and δ18O) were measured in annual tree-ring cellulose samples dated from 1756 to 2015 CE. These samples were extracted from Chinese pine (Pinus tabulaeformis Carr.) trees located in a semi-arid region of north-central China. We found that tree-ring δ13C and δ18O values both recorded similar climatic signals (e.g., temperature and moisture changes), but found that tree-ring δ13C exhibited a stronger relationship with mean temperature, precipitation, average relative humidity, self-calibrating Palmer drought severity index (scPDSI), and standard precipitation evaporation index (SPEI) than δ18O during the period 1951–2015 CE. The strongest correlation observed was between tree-ring δ13C and scPDSI (previous June to current May), which explains ~43% of the variance. The resulting 130-year reconstruction reveals severe drought events in the 1920s and a sustained drying trend since the 1980s. This hydroclimate record based on tree-ring δ13C data also reveals similar dry and wet events to other proxy data (i.e., tree-ring width and historical documentation) that have allowed reconstructions to be made across the northern fringe of the Asian summer monsoon region. Our results suggest that both large-scale modes of climate variability (e.g., El Niño-Southern Oscillation, Pacific Decadal Oscillation, and North Atlantic Oscillation) and external forcing (e.g., solar variability) may have modulated moisture variability in this region. Our results imply that the relationship between tree-ring δ18O and local climate is less well-characterized when compared to δ13C and may be affected more strongly by the influences of these different atmospheric circulation patterns. In this semi-arid region, tree-ring δ13C appears to represent a better tool with which to investigate historical moisture changes (scPDSI).
published_date 2022-03-22T04:17:11Z
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