Permafrost degradation  at two monitored palsa mires  in north-west Finland

Verdonen, Mariana; Störmer, Alexander; Lotsari, Eliisa; Korpelainen, Pasi; Burkhard, Benjamin; Colpaert, Alfred; Kumpula, Timo

doi:10.5194/tc-17-1803-2023

Cited by 9 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies of peatland ice conditions in Northern Finland are lacking; however, a study by Rasmus et al (2020b) reports similar perceptions on ground frost among reindeer herders. In north-western Finland, significant degradation of permafrost has been reported during a 1959-2021 study period (Verdonen et al 2023).…”

Section: Changes In Seasonal Weather and Snow And Ice Conditionsmentioning

confidence: 99%

Perceptions on and impacts of environmental changes under multiple stressors: a case study from two communities in northern Fennoscandia

Eilola,

Horstkotte,

Forbes

et al. 2024

Reg Environ Change

View full text Add to dashboard Cite

Against the backcloth of particularly fast environmental change in the Arctic, this study juxtaposes local perceptions of environmental change in two communities in the boreal zone of Northern Europe with scientific data. The local knowledge was gathered through an online participatory mapping survey among the two communities and scientific evidence was gathered from various peer-reviewed and official monitoring sources. Local knowledge of environmental change in Savukoski (Finland) resembles that in Jokkmokk (Sweden). Most perceived changes are in line with scientific studies, public discourse, and local concerns in the Arctic. What differs, however, is the degree of correspondence between local and scientific knowledge on certain phenomena: some dynamics are well documented in both local and scientific observations whereas other dynamics require more nuanced scientific research, particularly considering their relevance for local livelihoods. Among these are: berry yields, the abundance of mosquitoes and other Nematocera, peatland thaw and frost, and changes in river and lake ice conditions. It is noteworthy that in both Savukoski and Jokkmokk, for many people the most impactful changes are caused by resource extraction rather than climate change. Local concerns and perceptions of environmental change are not all shared nor easily translate into adaptation strategies, but nonetheless they have clear policy implications.

show abstract

Section: Changes In Seasonal Weather and Snow And Ice Conditionsmentioning

confidence: 99%

Perceptions on and impacts of environmental changes under multiple stressors: a case study from two communities in northern Fennoscandia

Eilola,

Horstkotte,

Forbes

et al. 2024

Reg Environ Change

View full text Add to dashboard Cite

show abstract

“…We test the sensors at three river bank sites in different geographical, climatological and landscape settings in Finland: the Pulmanki, Oulanka and Vantaa rivers (Figure 1). In addition, one collapsing palsa mire (a peat mound with permanently frozen core [Verdonen et al, 2023]) bank was considered in one of the river systems. The subarctic Pulmanki site (Figure 1e) in the far north of Finland is a well-studied meandering river with high outer banks (Lotsari et al, 2014(Lotsari et al, , 2019(Lotsari et al, , 2020.…”

Section: Field Sitesmentioning

confidence: 99%

Employing novel wireless agricultural sensors for real‐time monitoring of fluvial bank erosion

Rooijen

Dietze

Lotsari

2023

Earth Surf Processes Landf

Self Cite

View full text Add to dashboard Cite

Bank erosion impacts sediment transport and river morphology, both important processes for river managers. Some important factors, such as timing and causes of bank erosion, are difficult to assess with established techniques. We explore the capability of smart sensors, actually developed for the agricultural sector, to measure soil moisture and temperature as well as movement in real time on banks of northern rivers in different geographical, climatological and landscape settings. Soil movement and its timing were easy to identify from the measurements, and in many cases, the reason for the onset of movement could be inferred. The sensors automatically upload data with a high temporal resolution for a long period of time, while only minimally disturbing the bank itself. However, the sensor approach has a low spatial resolution (point measurements), and therefore, complementing the measurements with approaches with a high spatial resolution, such as spatially continuous digital elevation models of differencing techniques or seismic sensors, is advised. Overall, the measurement approach using new agricultural sensors has several unique advantages and disadvantages and can be a good tool for the monitoring of river bank erosion and could lead to new insights.

show abstract

Morphology and dynamics of thermokarst ponds in a subarctic permafrost peatland, northern Sweden

Seemann,

Sannel

2024

Earth Surf Processes Landf

View full text Add to dashboard Cite

Rapid climatic changes cause permafrost to thaw, initiating thermokarst landforms such as lakes and ponds. These waterbodies cover large extents of the northern circumpolar permafrost region and are significant sources of greenhouse gases. For the assessment of current and potential future waterbody development, continuous monitoring and analyses of the driving factors are required. In Dávvavuopmi, a permafrost peatland located in the sporadic permafrost zone of northern Sweden, high‐resolution imagery of the first two decades of the 21st century is available. This study combined field, GIS and statistical methods to explain spatiotemporal pond dynamics by investigating pond morphology and regional climate characteristics. Erosion affected 42% of the shorelines, and the erosion intensity was significantly correlated with the height and slope of bluffs facing the waterbodies. Along some sections, active erosion was causing shoreline retreat, but the dominant trend in this landscape was pond drainage and terrestrialisation/fen vegetation ingrowth. Between 2003 and 2021 the thermokarst pond area and number decreased by 6%/decade and 27%/decade, respectively. Inter‐ and intra‐annual climatic parameters could not be directly linked to thermokarst pond dynamics. Instead, the climate conditions (MAAT/snow depth) control permafrost degradation, causing enhanced hydrological connectivity in the landscape, which drives the pond drainage trend.

show abstract

Permafrost degradation at two monitored palsa mires in north-west Finland

Cited by 9 publications

References 42 publications

Perceptions on and impacts of environmental changes under multiple stressors: a case study from two communities in northern Fennoscandia

Perceptions on and impacts of environmental changes under multiple stressors: a case study from two communities in northern Fennoscandia

Employing novel wireless agricultural sensors for real‐time monitoring of fluvial bank erosion

Morphology and dynamics of thermokarst ponds in a subarctic permafrost peatland, northern Sweden

Contact Info

Product

Resources

About