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Long-term effects of rewetting and drought on GPP in a temperate peatland based on satellite remote sensing data.
Zhou, Yinying; Sachs, Torsten; Li, Zhan; Pang, Yuwen; Xu, Junfeng; Kalhori, Aram; Wille, Christian; Peng, Xiaoxue; Fu, Xianhao; Wu, Yanfei; Wu, Lin.
Afiliación
  • Zhou Y; School of information science and technology, Hangzhou Normal University, Hangzhou 311121, China; Ningbo Alatu Digital Technology Co., Ltd., Ningbo, China.
  • Sachs T; GFZ German Research Centre for Geosciences, Potsdam, Germany.
  • Li Z; GFZ German Research Centre for Geosciences, Potsdam, Germany.
  • Pang Y; Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Helsinki, Finland.
  • Xu J; School of information science and technology, Hangzhou Normal University, Hangzhou 311121, China. Electronic address: xjf11@zju.edu.cn.
  • Kalhori A; GFZ German Research Centre for Geosciences, Potsdam, Germany.
  • Wille C; GFZ German Research Centre for Geosciences, Potsdam, Germany.
  • Peng X; School of information science and technology, Hangzhou Normal University, Hangzhou 311121, China.
  • Fu X; School of information science and technology, Hangzhou Normal University, Hangzhou 311121, China.
  • Wu Y; School of information science and technology, Hangzhou Normal University, Hangzhou 311121, China.
  • Wu L; Hubei Minzu University, Enshi, China.
Sci Total Environ ; 882: 163395, 2023 Jul 15.
Article en En | MEDLINE | ID: mdl-37044335
Rewetting previously drained peatlands restores the critical function of peatlands as long-term carbon storages and sinks currently threatened by climate change and additional human-induced disturbances. Understanding and projecting the restoration process by rewetting, however, currently face a pressing challenge, the lack of consistent and gap-free records of important carbon cycling indicators of peatlands such as the gross primary production (GPP) over long term. In this study, we reconstructed the GPP in a rewetted peatland called Zarnekow (Fluxnet-ID: DE-Zrk) in Germany from 2000 to 2020 by combining long-term satellite observations and limited-term tower-based eddy covariance (EC) measurements based on Random Forest regression models. The R2 between the reconstructed data and EC data was 0.6. The reasonable reconstruction of long-term GPP enabled trend analysis that identified two distinct periods of decreasing/increasing in GPP due to rewetting and droughts. Rewetting in the winter of 2004 and 2005 stabilized GPP after a decreasing period. A drought in 2018 significantly increased GPP, and GPP remained high over the following two years. Furthermore, the month-specific trends show significant seasonality at this site, specifically, an increasing trend over the 21 years in the growing-season months of June to August and a decreasing trend in the other months. The most important variables for satellite-based estimates of GPP at this site include total evapotranspiration, land surface temperature, enhanced vegetation index and near-infrared reflectance vegetation index. Long-term analyses of carbon fluxes through the combination of satellite observations and EC measurements provide crucial insights into the restoration of carbon sequestration functions in rewetted peatlands.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Sci Total Environ Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Sci Total Environ Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos