Impacts of permafrost thaw on streamflow recession in a discontinuous permafrost watershed of northeastern China

Feng, Xinyue; Duan, Liangliang; Kurylyk, Barret L.; Cai, Tijiu

doi:10.1016/j.scitotenv.2022.157624

Cited by 6 publications

(4 citation statements)

References 71 publications

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“…While forest cover changes were minimal, alterations in forest structure can impact There are certain uncertainties in this study, which will be the direction of future research. First, our study watershed is located in sporadic permafrost zones (Brown et al, 1997) and may have a tendency to melt (Duan et al, 2017;Feng et al, 2022). Thus, Distinguish-…”

Section: Implications Uncertainly and Future Workmentioning

confidence: 99%

Streamflow responses to forest and climate change in the boreal Da Hinggan Mountains, Northeastern China

Yu,

Hallema,

Cai

2023

Ecohydrology

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Boreal forests cover vast stretches of land across all continents and represent a principal source area of clean water in the northern hemisphere. Increasingly, studies are conducted on the impact of changes in boreal forest cover on water yield; however, much remains unknown concerning the effects of forest structure changes on stream discharge over the course of multi‐decadal forest harvest cycles. In this study, we analysed long‐term hydrometeorological and forest dynamics data spanning from 1990 to 2016 from a typical boreal forest watershed in the Da Hinggan Mountains in northern China. Our objective was to quantify how changes in forest age and tree species composition affect mean annual streamflow and flow regimes in the context of a changing climate. To distinguish the effects of forest and climate changes on annual streamflow from one another, we employed a combination of a sensitivity‐based method and a temporal trend analysis. Further, we evaluated the impact of forest changes on flow regimes using four indicators: magnitude, duration, frequency, and variability. The results indicated that mean annual streamflow increased by 55.8 mm, with forest changes contributing +61.4 mm compared to −5.6 mm due to climate change (negative effect). This increase occurred when approximately 20% of mature coniferous forests transitioned to mid‐age broad‐leaved forests, accompanied by a 10% increase in total stock volume during the later period. Finally, the effect of changes in forest structure on flow regime were not significant. Our results underscore that variations in forest structure affect streamflow differently depending on stand age and species proportions. Therefore, dynamic forest structure management can benefit not only carbon sequestration but also water supply capacity in boreal forested watersheds.

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Section: Implications Uncertainly and Future Workmentioning

confidence: 99%

Streamflow responses to forest and climate change in the boreal Da Hinggan Mountains, Northeastern China

Yu,

Hallema,

Cai

2023

Ecohydrology

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“…Recent studies have indicated that accelerated permafrost warming and widespread forest fires in South Siberia are the two major drivers for increasing winter streamflow (Panyushkina et al, 2021). In continuous permafrost-dominated river basins, permafrost thaw is altering terrestrial hydrological processes by increasing the active-layer thickness and extending recession flow durations (Feng et al, 2022). Additionally, climate warming is leading to a notable shift towards early spring high-flow events on permafrostdominated Siberian rivers (Gautier et al, 2018;Melnikov et al, 2019;Song et al, 2020).…”

Section: Petmentioning

confidence: 99%

Complex streamflow responses to climate warming in five river basins in South Yakutia, Russia

Wang

Shpakova

2022

Front. Environ. Sci.

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The climate is warming much faster than the global average at the northern mid–high latitudes, leading to intensified hydrological cycles. However, it is unclear whether the response of streamflow to climate change is uniform across river basins with areas of 104–105 km2. In this study, monthly streamflow data from five river basins (Bol’shoy Patom, Chara, Olekma, Timpton, and Uchur) and gridded monthly temperature and precipitation data from the Russian South Yakutia at 53.5–61.5°N were analysed to investigate changes in their annual streamflow from 1934 to 2019 and their responses to climate warming. The results showed significant increasing trends in air temperature for all five basins at rates of 0.20°C–0.22°C/decade (p < 0.001), with faster warming after the 1980s. Apart from the Uchur River Basin, increasing trends in annual precipitation were observed in the other four river basins at rates of 9.3–15.7 mm/decade (p < 0.01). However, temporal changes in streamflow were much more complex than those in air temperature and precipitation among the five basins. Only two of the five basins showed significant increasing trends in annual streamflow with change rates of 17.1 mm/decade (p < 0.001) for the Chara River and 7.7 mm/decade (p < 0.05) for the Olekma River. Although the other three basins showed slightly increasing trends in annual streamflow (1.8–4.0 mm/decade), these trends did not pass significance tests (p > 0.05). By analysing the temperature-precipitation-streamflow relationships, we determined that the annual streamflow positively responds to precipitation, while winter streamflow is most sensitive to temperature. With climate warming, the streamflow during the winter period (October-April) increased significantly in four of the five river basins at rates of 1.4–3.1 mm/decade (p < 0.001), suggesting that warming-induced permafrost thawing increases baseflow. Although the streamflow response of large Siberian rivers to climate change is consistent, our results suggest that the streamflow response to climate change in relatively small river basins (104–105 km2) is much more complex.

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“…Permafrost is soil/underwater sediment which remains below 0 • C for two years or more, overlain by an active layer above and unfrozen ground below (Figure 1) [2]. Permafrost thaw can lead to, e.g., land subsidence, habitat disruption, changes in vegetation, and altered hydrological interactions, implying major ecological impacts on the biogeochemistry of permafrost [3,4].…”

Section: Introductionmentioning

confidence: 99%

Opening Pandora’s Box: Neglected Biochemical Potential of Permafrost-Associated Fungal Communities in a Warming Climate

Masigol,

Retter,

Pourmoghaddam

et al. 2023

JoF

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Permafrost, a vast storage reservoir of frozen organic matter, is rapidly thawing due to climate change, releasing previously preserved carbon into the environment. This phenomenon has significant consequences for microbial communities, including fungi, inhabiting permafrost-associated regions. In this review, we delve into the intricate interplay between permafrost thawing and fungal diversity and functionality with an emphasis on thermokarst lakes. We explore how the release of organic carbon from thawing permafrost alters the composition and activities of fungal communities, emphasizing the potential for shifts in taxonomic diversity and functional gene expression. We discuss the formation of thermokarst lakes, as an example of permafrost thaw-induced ecological disruptions and their impact on fungal communities. Furthermore, we analyze the repercussions of these changes, including effects on nutrient cycling, plant productivity, and greenhouse gas (GHG) emissions. By elucidating the multifaceted relationship between permafrost thaw and aquatic fungi, this review provides valuable insights into the ecological consequences of ongoing climate change in permafrost-affected regions.

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Impacts of permafrost thaw on streamflow recession in a discontinuous permafrost watershed of northeastern China

Cited by 6 publications

References 71 publications

Streamflow responses to forest and climate change in the boreal Da Hinggan Mountains, Northeastern China

Streamflow responses to forest and climate change in the boreal Da Hinggan Mountains, Northeastern China

Complex streamflow responses to climate warming in five river basins in South Yakutia, Russia

Opening Pandora’s Box: Neglected Biochemical Potential of Permafrost-Associated Fungal Communities in a Warming Climate

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