Ingmar Nitze
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View article: High-resolution inventory and classification of retrogressive thaw slumps in West Siberia
High-resolution inventory and classification of retrogressive thaw slumps in West Siberia Open
Permafrost thaw disrupts ecosystems, hydrology, and biogeochemical cycles, reinforcing climate change through a positive permafrost-carbon feedback loop. Thaw can be gradual, deepening the active layer, or abrupt, triggering thermokarst, t…
View article: Rapid increase in West Siberia’s retrogressive thaw slumps since 1964 associated with Arctic winter warming
Rapid increase in West Siberia’s retrogressive thaw slumps since 1964 associated with Arctic winter warming Open
Retrogressive thaw slumps (RTSs) are key indicators of permafrost thaw in the West Siberian Arctic. Based on a new high-resolution remote sensing-derived, field-verified inventory of 6168 RTSs for the Yamal and Gydan peninsulas, we provide…
View article: Large driftwood accumulations along arctic coastlines and rivers
Large driftwood accumulations along arctic coastlines and rivers Open
Driftwood deposits along Arctic coastlines play key ecological roles and serve as indicators of past environmental conditions. Yet, there is a lack of knowledge regarding large-scale distribution patterns, which are important to assess its…
View article: DARTS: Multi-year database of AI-detected retrogressive thaw slumps in the circum-arctic permafrost region
DARTS: Multi-year database of AI-detected retrogressive thaw slumps in the circum-arctic permafrost region Open
Retrogressive Thaw Slumps (RTS) are widespread mass-wasting hillslope failures triggered by thawing permafrost. While regional studies have provided insights into the spatial distribution and dynamics of RTS, a consistent and unbiased quan…
View article: Using Texture‐Based Image Segmentation and Machine Learning With High‐Resolution Satellite Imagery to Assess Permafrost Degradation Landforms in the Russian High Arctic
Using Texture‐Based Image Segmentation and Machine Learning With High‐Resolution Satellite Imagery to Assess Permafrost Degradation Landforms in the Russian High Arctic Open
Amplified climate change across the Arctic causes significant permafrost thaw and an increase of permafrost degradation landforms. These landforms range from fine‐scale degrading ice wedge‐polygon‐networks to large‐scale features such as t…
View article: Thermokarst Lagoons: Distribution, Classification and Dynamics in Permafrost‐to‐Marine Transitions
Thermokarst Lagoons: Distribution, Classification and Dynamics in Permafrost‐to‐Marine Transitions Open
The transition of permafrost landscapes to marine environments, driven by climate change, plays a crucial role in the global carbon cycle. Thermokarst lagoons, formed along permafrost coasts when thermokarst lakes get connected to the sea,…
View article: Stochastic Modelling of Thermokarst Lakes: Size Distributions and Dynamic Regimes
Stochastic Modelling of Thermokarst Lakes: Size Distributions and Dynamic Regimes Open
Thermokarst lakes are among the most common and dynamic landscape features in ice-rich permafrost lowland regions. They influence carbon, water and energy fluxes between atmosphere and land surface and are an important component of Arctic …
View article: Annual and sub-seasonal dynamics of a rapidly eroding permafrost coastline along the Beaufort Sea in northern Alaska
Annual and sub-seasonal dynamics of a rapidly eroding permafrost coastline along the Beaufort Sea in northern Alaska Open
Drew Point, an unlithified ice-rich permafrost coastline along the Alaskan Beaufort Sea, is among the most rapidly eroding Arctic coastlines, with an average erosion rate of 19 m/yr from 2007 to 2019. We use 16 high-resolution remote sensi…
View article: Pan-Arctic Permafrost Landform and Human-built Infrastructure Feature Detection with Vision Transformers and Location Embeddings
Pan-Arctic Permafrost Landform and Human-built Infrastructure Feature Detection with Vision Transformers and Location Embeddings Open
Accurate mapping of permafrost landforms, thaw disturbances, and human-built infrastructure at pan-Arctic scale using sub-meter satellite imagery is increasingly critical. Handling petabyte-scale image data requires high-performance comput…
View article: High-resolution inventory and classification of retrogressive thaw slumps in West Siberia
High-resolution inventory and classification of retrogressive thaw slumps in West Siberia Open
Permafrost thaw disrupts ecosystems, hydrology, and biogeochemical cycles, reinforcing climate change through a positive permafrost-carbon feedback loop. Thaw can be gradual, deepening the active layer, or abrupt, triggering thermokarst, t…
View article: The changing face of the Arctic: four decades of greening and implications for tundra ecosystems
The changing face of the Arctic: four decades of greening and implications for tundra ecosystems Open
Arctic landscapes occupy a nexus of environmental change processes, globally significant soil carbon stores, wildlife populations, and subsistence-based human societies. In response to rapid climate warming, tundra ecosystems are experienc…
View article: Rapid Changes in Retrogressive Thaw Slump Dynamics in the Russian High Arctic Based on Very High‐Resolution Remote Sensing
Rapid Changes in Retrogressive Thaw Slump Dynamics in the Russian High Arctic Based on Very High‐Resolution Remote Sensing Open
We used very high‐resolution satellite images to map the development of retrogressive thaw slumps (RTS) at six sites in the Russian High Arctic for the period 2011 to 2020. The 3,466 mapped RTS revealed an overall high activity, with site‐…
View article: Communicating remotely sensed pan-arctic permafrost land surface changes to non-specialist audiences with the Arctic Landscape EXplorer (ALEX)
Communicating remotely sensed pan-arctic permafrost land surface changes to non-specialist audiences with the Arctic Landscape EXplorer (ALEX) Open
Climate change has led to an increase in permafrost warming and thaw at global scale. Land surface changes associated with permafrost thaw include the acceleration of Arctic coastal erosion, increased thaw slumping in ice-rich regions, the…
View article: Creating a Pan-Arctic Retrogressive Thaw Slump Dataset with Harmonized Sentinel-2 Data and Deep Learning Methods
Creating a Pan-Arctic Retrogressive Thaw Slump Dataset with Harmonized Sentinel-2 Data and Deep Learning Methods Open
In a rapidly changing permafrost environment driven by climate change and anthropogenic disturbances, tracking geomorphological dynamics is a crucial task, not only to provide hazard monitoring, but also to evaluate climatological feedback…
View article: Detecting mass wasting of Retrogressive Thaw Slumps in spaceborne elevation models using deep learning
Detecting mass wasting of Retrogressive Thaw Slumps in spaceborne elevation models using deep learning Open
Climate change has led to stronger warming in the Arctic, causing higher ground temperatures and extensive permafrost thaw. Retrogressive Thaw Slumps (RTSs) represent one of the most rapid and considerable geomorphological changes in perma…
View article: Very high resolution aerial image orthomosaics, point clouds, and elevation datasets of select permafrost landscapes in Alaska and northwestern Canada
Very high resolution aerial image orthomosaics, point clouds, and elevation datasets of select permafrost landscapes in Alaska and northwestern Canada Open
Permafrost landscapes in the Arctic are highly vulnerable to warming, with rapid changes underway. High-resolution remote sensing, especially aerial datasets, offers valuable insights into current permafrost characteristics and thaw dynami…
View article: Pan‐Arctic Assessment of Coastal Settlements and Infrastructure Vulnerable to Coastal Erosion, Sea‐Level Rise, and Permafrost Thaw
Pan‐Arctic Assessment of Coastal Settlements and Infrastructure Vulnerable to Coastal Erosion, Sea‐Level Rise, and Permafrost Thaw Open
This study assesses the vulnerability of Arctic coastal settlements and infrastructure to coastal erosion, Sea‐Level Rise (SLR) and permafrost warming. For the first time, we characterize coastline retreat consistently along permafrost coa…
View article: Thermokarst lake change and lake hydrochemistry: A snapshot from the Arctic Coastal Plain of Alaska
Thermokarst lake change and lake hydrochemistry: A snapshot from the Arctic Coastal Plain of Alaska Open
The rapid climate warming is affecting the Arctic which is rich in aquatic systems. As a result of permafrost thaw, thermokarst lakes and ponds are either shrinking due to lake drainage or expanding due to lake shore erosion. This process …
View article: Review article: Retrogressive thaw slump characteristics and terminology
Review article: Retrogressive thaw slump characteristics and terminology Open
Retrogressive thaw slumps (RTSs) are spectacular landforms that occur due to the thawing of ice-rich permafrost or melting of massive ground ice, often in hillslope terrain. RTSs occur in the Arctic, the subarctic, and high mountain (Qingh…
View article: A Labeling Intercomparison of Retrogressive Thaw Slumps by a Diverse Group of Domain Experts
A Labeling Intercomparison of Retrogressive Thaw Slumps by a Diverse Group of Domain Experts Open
Deep‐learning (DL) models have become increasingly beneficial for the detection of retrogressive thaw slumps (RTS) in the permafrost domain. However, comparing accuracy metrics is challenging due to unstandardized labeling guidelines. To a…
View article: DARTS: Multi-year database of AI-detected retrogressive thaw slumps in the circum-arctic permafrost region
DARTS: Multi-year database of AI-detected retrogressive thaw slumps in the circum-arctic permafrost region Open
Retrogressive Thaw Slumps (RTS) are widespread mass-wasting hillslope failures triggered by thawing permafrost. While regional studies have provided insights into the spatial distribution and dynamics of RTS, a consistent and unbiased quan…
View article: Topography Controls Variability in Circumpolar Permafrost Thaw Pond Expansion
Topography Controls Variability in Circumpolar Permafrost Thaw Pond Expansion Open
One of the most conspicuous signals of climate change in high‐latitude tundra is the expansion of ice wedge thermokarst pools. These small but abundant water features form rapidly in depressions caused by the melting of ice wedges (i.e., m…
View article: Unraveling boreal forest composition and drivers across scales in eastern Siberia
Unraveling boreal forest composition and drivers across scales in eastern Siberia Open
The Siberian boreal forest is the largest continuous forest region on Earth and plays a crucial role in regulating global climate. However, the distribution and environmental processes behind this ecosystem are still not well understood. H…
View article: A labeling intercomparison of retrogressive thaw slumps by a diverse group of domain experts
A labeling intercomparison of retrogressive thaw slumps by a diverse group of domain experts Open
Deep-learning (DL) models have become increasingly beneficial for the detection of retrogressive thaw slumps (RTS) in the permafrost domain. However, comparing accuracy metrics is challenging due to unstandardized labeling guidelines. To a…
View article: Vulnerability assessment of Arctic coastal communities to the effects of coastal erosion and permafrost warming.
Vulnerability assessment of Arctic coastal communities to the effects of coastal erosion and permafrost warming. Open
This study assesses the escalating vulnerability of Arctic coastal communities due to the combined impacts of coastal erosion and permafrost warming. With the Arctic experiencing heightened temperatures, coastal permafrost areas face incre…
View article: ARTS: a scalable data set for Arctic Retrogressive Thaw Slumps
ARTS: a scalable data set for Arctic Retrogressive Thaw Slumps Open
Retrogressive thaw slumps (RTS) are one of the most rapid abrupt thaw events that have a positive feedback on climate warming. RTS are not yet well understood because of the lack of geospatial products describing abrupt thaw distribution a…
View article: Modern spatial distribution of diverse retrogressive thaw slumps in West Siberia
Modern spatial distribution of diverse retrogressive thaw slumps in West Siberia Open
Regressive thaw slumps (RTSs) are permafrost landforms formed by the thawing of ice-rich permafrost or the melting of massive ground ice. The West Siberian Arctic (Yamal and Gydan peninsulas) is an area with widespread distribution of RTSs…