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Vegetation biomass change in China in the 20th century: an assessment based on a combination of multi-model simulations and field observations

Song, Xiang; Li, Fang; Harrison, Sandy P; Luo, Tianxiang; Arneth, Almut; Forrest, Matthew; Hantson, Stijn; Lasslop, Gitta; Mangeon, Stephane; Ni, Jian; Yue, Chao; Hickler, Thomas; Luo, Yiqi; Sitch, Stephen; Xu, Xin; Zhu, Zaichun

Abstract:
Vegetation biomass is a key and active component of the carbon cycle. Though China's vegetation biomass in recent decades has been widely investigated, only two studies have quantitatively assessed its century-scale changes so far and reported totally opposite trends. This study provided the first multi-model estimates of China's vegetation biomass change for the 20th century and its responses to historical changes in environmental and anthropogenic factors, based on simulations evaluated with the field observations from 3757 inventory plots in China and bias-corrected using machine learning (Gaussian process regression). A significant decline in vegetation biomass over the 20th century was shown by bias-corrected simulations from the six Dynamic Global Vegetation models (DGVMs) with trends ranging from −32.48 to −11.10 Tg C yr$^{-1}$ and a mean trend of −17.74 Tg C yr$^{-1}$. Land use and land cover change (LULCC) was primarily responsible for the simulated downward trend (−50.71 to −24.28 Tg C yr$^{-1}$), while increasing atmospheric CO$_{2}$ concentration lead to increased vegetation biomass (+9.27 to + 13.37 Tg C yr$^{-1}$). Climate change had limited impacts on the long-term trend (−3.75 to + 5.06 Tg C yr$^{-1}$). ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124516
Veröffentlicht am 13.10.2020
Originalveröffentlichung
DOI: 10.1088/1748-9326/ab94e8
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 21.08.2020
Sprache Englisch
Identifikator ISSN: 1748-9326
KITopen-ID: 1000124516
Erschienen in Environmental research letters
Band 15
Heft 9
Seiten Art.-Nr. 094026
Vorab online veröffentlicht am 20.05.2020
Externe Relationen Abstract/Volltext
Nachgewiesen in Web of Science
Scopus
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