The status and stability of permafrost carbon on the Tibetan Plateau

Mu, Cuicui; Abbott, Benjamin W.; Norris, Adam J.; Mu, Mei; Fan, Chengyan; Chen, Xu; Lin, Jian; Yang, Ruimin; Zhang, Tingjun; Wang, Kang; Peng, Xiaoqing; Wu, Qingbai; Guggenberger, Georg; Wu, Xiaodong

doi:10.1016/j.earscirev.2020.103433

Cited by 151 publications

(104 citation statements)

References 218 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Third Pole is also one of the most sensitive areas with respect to global climate change and has a warming rate that is approximately twice the global average (Stocker et al, 2013). In the past few decades, permafrost in the Third Pole region has experienced obvious degradation (Mu et al, 2020b;Ran et al, 2018;Turetsky et al, 2019;Wu et al, 2012). Permafrost degradation will not only cause serious geological disasters and affect engineering construction in cold areas, but it will also accelerate the decomposition of the huge SOC pool stored in permafrost (Cheng and Wu, 2007;Cheng et al, 2019;Ding et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…The aforementioned studies improved our understanding of SOC storage in the Third Pole region, but estimation results of 0-3 m SOC pool have large uncertainties, ranging from 17.1 to 40.9 Pg. In addition, the large-scale maps of vegetation and soil types used in these studies were associated with large uncertainties because they were created years ago and have a low spatial resolution, thus leading to potentially large errors in the estimated total SOC pools (Mishra et al, 2013;Mu et al, 2020a). Recently, considerable progress has been made in digital soil mapping methods.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A 1 km resolution soil organic carbon dataset for frozen ground in the Third Pole

Wang

Zhao

et al. 2021

Earth Syst. Sci. Data

Self Cite

View full text Add to dashboard Cite

Abstract. Soil organic carbon (SOC) is very important in the vulnerable ecological environment of the Third Pole; however, data regarding the spatial distribution of SOC are still scarce and uncertain. Based on multiple environmental variables and soil profile data from 458 pits (depth of 0–1 m) and 114 cores (depth of 0–3 m), this study uses a machine-learning approach to evaluate the SOC storage and spatial distribution at a depth interval of 0–3 m in the frozen ground area of the Third Pole region. Our results showed that SOC stocks (SOCSs) exhibited a decreasing spatial pattern from the southeast towards the northwest. The estimated SOC storage in the upper 3 m of the soil profile was 46.18 Pg for an area of 3.27×106 km2, which included 21.69 and 24.49 Pg for areas of permafrost and seasonally frozen ground, respectively. Our results provide information on the storage and patterns of SOCSs at a 1 km resolution for areas of frozen ground in the Third Pole region, thus providing a scientific basis for future studies pertaining to Earth system models. The dataset is open-access and available at https://doi.org/10.5281/zenodo.4293454 (Wang et al., 2020).

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 1 km resolution soil organic carbon dataset for frozen ground in the Third Pole

Wang

Zhao

et al. 2021

Earth Syst. Sci. Data

Self Cite

View full text Add to dashboard Cite

show abstract

“…For instance, the phase change of unfrozen water to ice increases heat transport (thermal conductivities of ice and water are 2.2 and 0.6 W m −1 K −1 , respectively) [17,18], reduces hydraulic conductivity and permeability because ice impedes water flow [19], and increases soil strength [20]. Soil freeze-thaw dynamics result in a phase change between unfrozen water and ice [13,21], hydrothermal migration [22,23], release of greenhouse gas(es) [24], and salt accumulation [25,26] that alter energy and mass exchange at the soil-atmosphere interface. Frozen soil, therefore, impacts agricultural, engineering, and environmental practices and socio-economic development in cold regions [12,14,[27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

A Scientometric Review of Research Status on Unfrozen Soil Water

Feng

Zhang

et al. 2021

Water

Self Cite

View full text Add to dashboard Cite

Unfrozen soil water affects the physical, chemical, hydrological, and mechanical properties of frozen soils, and climate change makes these relationships more complicated. The objective of this study was to investigate the research status of unfrozen soil water using scientometrics. Publications on unfrozen water in frozen soil (UWFS) retrieved from the Web of Science were analyzed with scientometric software tools including VOSviewer, CiteSpace, and HistCite Pro. The annual publication trend, co-authorship of authors, organizations, and countries, and the co-occurrence of keywords were analyzed. The most utilized journals and high-impact publications were identified. The results showed that 2007 (the year the “Bali Road Map” was released) represents a turning point (from slow to rapid) in the development of research on unfrozen water in frozen soil. Researchers and organizations from China and the United States are the major contributors, while Cold Regions Science and Technology is the most utilized journal for publishing research pertaining to UWFS. Currently, there is still a lack of reliable and user-friendly methods and techniques for measuring unfrozen water content. Future efforts are required to understand the mechanisms governing the magnitude of unfrozen water content and to develop new approaches to accurately and rapidly measure unfrozen water content in both laboratory and in situ.

show abstract

“…The Qinghai-Tibet Plateau is the largest high-altitude permafrost region on Earth, with a wetland area coverring approximately 130,000 km 2 10 . Permafrost wetlands in the Qinghai-Tibet Plateau have received considerable attention, not only because the effects of climate warming on carbon ecosystems and wetlands emission are higher sensitive at high latitudes [11][12][13][14][15] , but also because this region holds vast amounts of soil organic carbon [16][17][18] stored in permafrost as well as thermogenic hydrocarbons in form of gas hydrates [19][20][21] . Climate warming has likely similar effects on greenhouse gases production in deep permafrost as in surface soils 14 .…”

Section: Introductionmentioning

confidence: 99%

Carbon Isotopic Evidences for Gas Hydrate Release and Its Significance on Seasonal Wetland Methane Emissions in the Qilian Mountains Permafrost

li¹,

Xing²,

Pang³

et al. 2021

Preprint

View full text Add to dashboard Cite

Wetland methane emissions in the permafrost regions of the Qinghai-Tibet Plateau is more sensitive to climate warming and can result in a positive climate feedback. Natural gas hydrate, as a potential methane source, may play a pivotal role in wetland methane emission in the permafrost regions. However, it was lacking of evidence. To determine the role of gas hydrate release in wetland methane emission, the two-year field monitoring of methane emitted from a hydrate drilling well, in near-surface soil free gas and low-level air was conducted at a typical gas hydrate reservior in the Qilian Mountains permafrost. The carbon isotope fractionation between CO2 and CH4 (εC) associated with carbon isotopic composition of methane (δ13CCH4) is used as a good tracer to identify methane sources of thermogenic origin or of microbial origin. The monitoring results of the gas hydrate drilling well DK-8 indicated a notable release of the deep gas hydrates occurred in April- May and resulted in the increase of methane content in low-level air. The significance of gas hydrate release in the permafrost region on local wetland methane emission as well as low-level air methane was confirmed by the seasonal variation of methane source of near-surface soil fluxes and low-level air. The thermogenically derived methane were identified as the dominant methane source in autumn and winter compared with increasing contribution of microbially derived methane in summer. The carbon isotopic signatures of tracing methane sources can provide more reliable evidence for gas hydrate release and its effect on the wetland methane emission in the Qilian Mountains permafrost.

show abstract

The status and stability of permafrost carbon on the Tibetan Plateau

Cited by 151 publications

References 218 publications

A 1 km resolution soil organic carbon dataset for frozen ground in the Third Pole

A 1 km resolution soil organic carbon dataset for frozen ground in the Third Pole

A Scientometric Review of Research Status on Unfrozen Soil Water

Carbon Isotopic Evidences for Gas Hydrate Release and Its Significance on Seasonal Wetland Methane Emissions in the Qilian Mountains Permafrost

Contact Info

Product

Resources

About