Preprints
https://doi.org/10.5194/essd-2022-167
https://doi.org/10.5194/essd-2022-167
 
31 May 2022
31 May 2022
Status: this preprint is currently under review for the journal ESSD.

A newly integrated ground temperature dataset of permafrost along the China-Russia crude oil pipeline route in Northeast China

Guoyu Li1,3,4, Wei Ma1,3,4, Fei Wang1,2, Huijun Jin1,3,5, Fedorov Alexander6, Dun Chen1,3, Gang Wu1,3,4, Yapeng Cao1,3,4, Yu Zhou1,3,4, Yanhu Mu1,3,4, Yuncheng Mao7, Jun Zhang8, Kai Gao1,3,4, Xiaoying Jin5, Ruixia He1,3, Xinyu Li9, and Yan Li1,3 Guoyu Li et al.
  • 1State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China
  • 3Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Jagdaqi, Inner Mongolia 165000, China
  • 4School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • 5School of Civil Engineering and Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • 6Melnikov Permafrost Institute, Russian Academy of Sciences, Yakutsk 677010, Russia
  • 7School of Civil Engineering, Northwest Minzu University, Lanzhou 730000, China
  • 8School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
  • 9School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Abstract. The thermal state of permafrost in the present and future is fundamental to the ecosystem evolution, hydrological process, carbon release, and infrastructure integrity in cold regions. From 2011, we began to establish a permafrost monitoring network along the China-Russia crude oil pipelines (CRCOPs) route at the eastern flank of the northern Da Xing'anling Mountains in Northeast China. Based on meteorological data near the southern limit of latitudinal permafrost (SLLP), ground temperature data in 20 boreholes with the depths of 10–60.6 m, soil volumetric liquid water contents and 2-D electrical resistivity tomography (ERT) data, we compiled an integrated dataset of the ground thermal state along the CRCOPs route. Study results demonstrate that permafrost in the vicinity of SLLP has experienced marked warming (2011–2020) to climate change, manifested as the rising permafrost temperatures at depth. Local thermal disturbances triggered by the construction and operation of CRCOPs have resulted in significant permafrost warming and subsequent thawing on the right-of-way (ROW) of the pipeline. This permafrost thaw will persist, but it can be alleviated by adopting mitigative measures, such as insulation layer and thermosyphons. The in-situ observational dataset is of great value for assessing the variability of permafrost under the linear disturbances of the CRCOPs and related environmental effects, for understanding hydro-thermal-mechanical interactions between the buried pipelines and permafrost foundation soils, and for evaluating the operational and structural integrity of the pipeline systems in the future. The dataset is available at the Third Pole Environment Data Center (http://doi.org/10.11888/Cryos.tpdc.272357 (Li, 2022)).

Guoyu Li et al.

Status: open (until 27 Jul 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2022-167', Anonymous Referee #1, 27 Jun 2022 reply
  • RC2: 'Comment on essd-2022-167', Anonymous Referee #2, 01 Jul 2022 reply

Guoyu Li et al.

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Short summary
A permafrost monitoring network along the China-Russia crude oil pipelines (CRCOPs ) route, at the eastern flank of the northern Da Xing'anling Mountains in Northeast China was established. The resulting dataset show that ground warming has been extensively observed in the vicinity of the southern limit of latitudinal permafrost, and local disturbances triggered by the CRCOPs have resulted in significant permafrost warming and subsequent thawing on the right-of-way of the pipeline.