Changes in carbon stock in the Xing’an permafrost regions in Northeast China from the late 1980s to 2020

Wang, Hongwei; Jin, Huijun; Li, Xiaoying; Li-hua, Zhou; Yuan, Qi; Huang, Chuanjun; He, Ruixia; Zhang, Jinlong; Yang, Rui; Li, Xiaoying; Șerban, Raul-David; Yang, Suiqiao; Wang, Wenhui

doi:10.1080/15481603.2023.2217578

Cited by 6 publications

(6 citation statements)

References 81 publications

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“…The growth rate of methane concentration in the southern permafrost degradation zone is higher than that in the northern permafrost stable zone. 6.…”

Section: Supplementary Materialsmentioning

confidence: 99%

“…Its permafrost layer has a high temperature, a thin thickness, and an unstable thermal state and is vulnerable to interference from the external environment, both from climate and human factors [2,3]. Studies have shown that since 1980, the continuous permafrost area in China has decreased from 70~80% to 30~50% and the permafrost area in Northeast China has decreased from 3.9 × 10 5 km 2 to 2.4 × 10 5 km 2 [4][5][6][7][8]. The degradation characteristics of permafrost are characterized by a gradual increase in the thickness of the active layer.…”

Section: Introductionmentioning

confidence: 99%

“…In the past 50 years, the air temperature in Northeast China has increased by 0.9~2.2 °C, which has caused the southern edge of the In recent years, the degradation characteristics of permafrost in Northeast China have been characterized by a gradual increase in ground temperature, an increase in the thickness of the active layer, and an increase in the melting zone. The permafrost exhibits a decrease in the upper limit and an increase in the lower limit, and the degradation mode of the permafrost changes the upper and lower limits simultaneously, with the lower limit rising faster than the upper limit falls [4][5][6]. In the past 50 years, the air temperature in Northeast China has increased by 0.9~2.2 • C, which has caused the southern edge of the Eurasia permafrost zone to obviously move northward.…”

Section: Introduction To Study Areamentioning

confidence: 99%

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Study of Methane Emission and Geological Sources in Northeast China Permafrost Area Related to Engineering Construction and Climate Disturbance Based on Ground Monitoring and AIRS

Chen

Shan

et al. 2023

Atmosphere

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China’s largest high-latitude permafrost distribution zone is in Northeast China. With the intensification of global warming and engineering construction, the carbon stored in permafrost will gradually thaw and be released in the form of methane gas. However, research on the changes in methane concentration and emission sources in this area is still unclear. In this paper, the AIRS (Atmospheric Infrared Sounder) data carried by the Aqua satellite were used to analyze the distribution and change trends in the overall methane concentration in the near-surface troposphere in Northeast China from 2003 to 2022. These data, combined with national meteorological and on-site monitoring data, were used to study the methane emission characteristics and sources in the permafrost area in Northeast China. The results show that the methane concentration in the near-surface troposphere of Northeast China is mainly concentrated in the permafrost area of the Da and Xiao Xing’an Mountains. From 2003 to 2022, the methane concentration in the near-surface troposphere of the permafrost area in Northeast China showed a rapid growth trend, with an average linear trend growth rate of 4.787 ppbv/a. In addition, the methane concentration in the near-surface troposphere of the permafrost area shows a significant bimodal seasonal variation pattern. The first peak appears in summer (June–August), with its maximum value appearing in August, and the second peak appears in winter (December–February), with its maximum value appearing in December. Combined with ground surface methane concentration monitoring, it was found that the maximum annual ground surface methane concentration in degraded permafrost areas occurred in spring, causing the maximum average growth rate in methane concentration, also in spring, in the near-surface troposphere of permafrost areas in Northeast China (with an average value of 6.05 ppbv/a). The growth rate of methane concentration in the southern permafrost degradation zone is higher than that in the northern permafrost stable zone. In addition, with the degradation of permafrost, the geological methane stored deep underground (methane hydrate, coal seam, etc., mainly derived from the accumulation of ancient microbial origin) in the frozen layer will become an important source of near-surface troposphere methane in the permafrost degradation area. Due to the influence of high-permeability channels after permafrost degradation, the release rate of methane gas in spring is faster than predicted, and the growth rate of methane concentration in the near-surface troposphere of permafrost areas can be increased by more than twice. These conclusions can provide a data supplement for the study of the carbon cycle in permafrost areas in Northeast China.

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“…The growth rate of methane concentration in the southern permafrost degradation zone is higher than that in the northern permafrost stable zone. 6.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introduction To Study Areamentioning

confidence: 99%

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Study of Methane Emission and Geological Sources in Northeast China Permafrost Area Related to Engineering Construction and Climate Disturbance Based on Ground Monitoring and AIRS

Chen

Shan

et al. 2023

Atmosphere

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“…In the past 60 years, evident permafrost degradation has been observed in Northeast China [33,34]. Permafrost degradation will lead to a series of ecological and environmental problems, such as the successions of boreal forest, uplifting and northward migration of timberline, shrinkage of boreal wetlands/peatlands, destabilization of soil carbon pool, and the rapid loss of soil carbon long trapped in permafrost and peatlands [12,[35][36][37][38]. It may also lead to the increase of periglacial geological hazards, impacting the regional stability and safety of major engineered infrastructures [39].…”

Section: Introductionmentioning

confidence: 99%

Influences of Snow Cover on the Thermal Regimes of Xing'an Permafrost in Northeast China in 1960s–2010s

Wang,

Jin,

Che

et al. 2024

Permafrost & Periglacial

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The distributive characteristics of snow cover and their impacting mechanisms on ground thermal regimes in Northeast China remain evasive because of limited systematic studies. In this study, based on long‐term ground‐based observational data and auxiliary topographic data, geographically weighted regression kriging (GWRK) method and the temperature at the top of permafrost (TTOP) model were used to analyze the influences of snow cover duration (SCD) and average snow depth over the SCD (ASDSCD) on the thermal regimes of Xing'an permafrost in Northeast China in the 1960s–2010s. The results show a remarkable reduction of permafrost extent in Northeast China from the 1960s to 2010s, with an average reduction rate of 4.115 × 104 km2/decade. In permafrost regions, from the 1960s to 2010s, average SCD varied between 150 and 160 days, and the regional average of ASDSCD between 8 and 14 cm. Increases in ASDSCD led to a rise of TTOP. From the 1960s to 2010s, the regional average of ASDSCD increased by 3.53 cm, and that of TTOP by 2.02°C. The research results can provide scientific basis and data support for evaluating the responses of permafrost and cold region ecosystems to climate change in Northeast China.

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“…Terrestrial ecosystems play a crucial role in carbon reduction and sequestration, making them important components of the global carbon cycle . The significance of terrestrial ecosystems in reducing carbon emissions and mitigating global warming has made them a major research hotspot worldwide in recent years (Tang et al, 2018;Piao et al, 2022;Wang H. W. et al, 2023a). Research has shown that LUCC is one of the important factors that influence the carbon cycling process in terrestrial ecosystems and cause regional changes in carbon balance (Zhao M. M. et al, 2019b;Zhu et al, 2019;Aneseyee et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Changes in carbon stock in the Xing’an permafrost regions in Northeast China from the late 1980s to 2020

Cited by 6 publications

References 81 publications

Study of Methane Emission and Geological Sources in Northeast China Permafrost Area Related to Engineering Construction and Climate Disturbance Based on Ground Monitoring and AIRS

Study of Methane Emission and Geological Sources in Northeast China Permafrost Area Related to Engineering Construction and Climate Disturbance Based on Ground Monitoring and AIRS

Influences of Snow Cover on the Thermal Regimes of Xing'an Permafrost in Northeast China in 1960s–2010s

Table1.DOCX

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