Birgit Heim
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View article: Investigating boreal forest successional stages in Alaska and Northwest Canada using UAV‐LiDAR and RGB and a community detection network
Investigating boreal forest successional stages in Alaska and Northwest Canada using UAV‐LiDAR and RGB and a community detection network Open
Boreal forests are a key component of the global carbon cycle, forming North America's most extensive biome. Different successional stages in boreal forests have varying levels of ecological values and biodiversity, which in turn affect th…
View article: Lake hydrochemistry and aquatic plant diversity across permafrost landscapes of Yakutia, Eastern Siberia
Lake hydrochemistry and aquatic plant diversity across permafrost landscapes of Yakutia, Eastern Siberia Open
Freshwater ecosystems are a major feature of the northern landscapes that are expected to experience significant future changes due to climate change and land-use alterations. In Central Yakutia, abundant lakes in topographic permafrost-th…
View article: BorFIT: A Novel LiDAR-Based Training Dataset for Individual Tree Segmentation and Species Detection in northern boreal Forests
BorFIT: A Novel LiDAR-Based Training Dataset for Individual Tree Segmentation and Species Detection in northern boreal Forests Open
BorFIT is a novel training data set designed to assist in the segmentation of individual trees and the detection of species from LiDAR point clouds, thus contributing to deep learning-based forestry applications. Recent advancements in AI-…
View article: Global biome changes over the last 21 000 years inferred from model–data comparisons
Global biome changes over the last 21 000 years inferred from model–data comparisons Open
We present a global megabiome reconstruction for 43 time slices at 500-year intervals throughout the last 21 000 years based on an updated, and thus currently the most extensive, global taxonomically and temporally standardized fossil poll…
View article: Proactive Tundra Conservation Strategy for a Rapidly Changing Arctic
Proactive Tundra Conservation Strategy for a Rapidly Changing Arctic Open
Warming induced forest expansion, permafrost thaw, and human activities are major drivers affecting the biodiversity and ecosystem functions of the Arctic tundra. While the pace of climate warming is fastest in the Arctic, some important s…
View article: A new habitat map of the Lena Delta in Arctic Siberia based on field and remote sensing datasets
A new habitat map of the Lena Delta in Arctic Siberia based on field and remote sensing datasets Open
The Lena Delta is the largest river delta in the Arctic (about 30 000 km2) and prone to rapid changes due to climate warming, associated cryosphere loss, and ecological shifts. The delta is characterized by ice-rich permafrost landscapes a…
View article: Lena River biogeochemistry captured by a 4.5-year high-frequency sampling program
Lena River biogeochemistry captured by a 4.5-year high-frequency sampling program Open
The Siberian Arctic is warming rapidly, causing permafrost to thaw and altering the biogeochemistry of aquatic environments, with cascading effects on the coastal and shelf ecosystems of the Arctic Ocean. The Lena River, one of the largest…
View article: A Benchmark Dataset for Sentinel-2 Based Forest Type Classification in the Siberian Summergreen-Evergreen Forest Transition Zone
A Benchmark Dataset for Sentinel-2 Based Forest Type Classification in the Siberian Summergreen-Evergreen Forest Transition Zone Open
Circumboreal forests covering about 30% of global forested areas are undergoing significant changes. In Siberia, global warming may reduce the dominance of summergreen larch forest inducing shifts towards evergreen forest types, specifical…
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: Diversity of lakes and ponds in the forest-tundra ecozone: from limnicity to limnodiversity
Diversity of lakes and ponds in the forest-tundra ecozone: from limnicity to limnodiversity Open
Arctic and subarctic landscapes have unique hydrological and limnological features and are now experiencing rapid change due to climate warming and permafrost thaw. The highly abundant lakes, ponds, and rivers across these landscapes play …
View article: The EnMAP spaceborne imaging spectroscopy mission: Initial scientific results two years after launch
The EnMAP spaceborne imaging spectroscopy mission: Initial scientific results two years after launch Open
Imaging spectroscopy has been a recognized and established remote sensing technology since the 1980s, mainly using airborne and field-based platforms to identify and quantify key bio- and geo-chemical surface and atmospheric compounds, bas…
View article: Lena River biogeochemistry captured by a 4.5-year high-frequency sampling program
Lena River biogeochemistry captured by a 4.5-year high-frequency sampling program Open
The Siberian Arctic is warming rapidly, causing permafrost to thaw and altering the biogeochemistry of aquatic environments, with cascading effects on the coastal and shelf ecosystems of the Arctic Ocean. The Lena River, one of the largest…
View article: Global biome changes over the last 21,000 years inferred from model-data comparisons
Global biome changes over the last 21,000 years inferred from model-data comparisons Open
We present a global megabiome reconstruction for 43 timeslices at 500-year intervals throughout the last 21,000 years based on an updated and thus currently most extensive global taxonomically and temporally standardized fossil pollen data…
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: Circumarctic land cover diversity considering wetness gradients
Circumarctic land cover diversity considering wetness gradients Open
Land cover heterogeneity information considering soil wetness across the entire Arctic tundra is of interest for a wide range of applications targeting climate change impacts and ecological research questions. Patterns are potentially link…
View article: Late Glacial and Holocene vegetation and lake changes in SW Yakutia, Siberia, inferred from sedaDNA, pollen, and XRF data
Late Glacial and Holocene vegetation and lake changes in SW Yakutia, Siberia, inferred from sedaDNA, pollen, and XRF data Open
Only a few palaeo-records extend beyond the Holocene in Yakutia, eastern Siberia, since most of the lakes in the region are of Holocene thermokarst origin. Thus, we have a poor understanding of the long-term interactions between terrestria…
View article: Status of the Circumpolar Landcover Unit database
Status of the Circumpolar Landcover Unit database Open
The Circumpolar Landcover unit database provides landcover information in high detail, spatially (10m) and thematically (23 units). Such detail is needed for a wide range of applications targeting climate change impacts and ecological rese…
View article: Limnological assessment of 51 climate-sensitive permafrost-thaw lakes in Central Yakutia, Siberia
Limnological assessment of 51 climate-sensitive permafrost-thaw lakes in Central Yakutia, Siberia Open
Climate is rapidly changing in northern regions, including Central Yakutia, a densely populated area in Siberia. Here, permafrost-thaw lakes in topographical depressions, named “alaas”, are widely distributed. Alaases and the r…
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: Comment on essd-2023-36
Comment on essd-2023-36 Open
Abstract. The Lena Delta is the largest river delta in the Arctic (about 30 000 km2) and prone to rapid changes due to climate warming, associated cryosphere loss and ecological shifts. The delta is characterized by ice-rich permafrost lan…
View article: Comment on essd-2023-36
Comment on essd-2023-36 Open
Abstract. The Lena Delta is the largest river delta in the Arctic (about 30 000 km2) and prone to rapid changes due to climate warming, associated cryosphere loss and ecological shifts. The delta is characterized by ice-rich permafrost lan…
View article: Drivers of heterogeneity in tundra vegetation productivity on the Yamal Peninsula, Siberia, Russia
Drivers of heterogeneity in tundra vegetation productivity on the Yamal Peninsula, Siberia, Russia Open
The direction and magnitude of tundra vegetation productivity trends inferred from the normalized difference vegetation index (NDVI) have exhibited spatiotemporal heterogeneity over recent decades. This study examined the spatial and tempo…
View article: Comment on egusphere-2023-2295
Comment on egusphere-2023-2295 Open
Abstract. Landcover heterogeneity information considering soil wetness across the entire Arctic tundra is of interest for a wide range of applications targeting climate change impacts and ecological research questions. Patterns potentially…
View article: Circumarctic landcover diversity considering wetness gradients
Circumarctic landcover diversity considering wetness gradients Open
Landcover heterogeneity information considering soil wetness across the entire Arctic tundra is of interest for a wide range of applications targeting climate change impacts and ecological research questions. Patterns potentially link to p…
View article: Circumpolar Landcover Units
Circumpolar Landcover Units Open
This record is obsolete. A new version has been published under https://zenodo.org/records/14235736 Landcover units have been derived from Copernicus Sentinel-1 und Sentinel-2 data acquired between 2016 and 2022 for the Arctic tundra biome…
View article: Circumpolar Landcover Units
Circumpolar Landcover Units Open
Landcover units have been derived from Copernicus Sentinel-1 und Sentinel-2 data acquired between 2016 and 2022 for the Arctic tundra biome. 23 units of which 20 represent different vegetation characteristics and soil conditions are provid…
View article: Tundra conservation challenged by forest expansion in a complex mountainous treeline ecotone as revealed by spatially explicit tree aboveground biomass modeling
Tundra conservation challenged by forest expansion in a complex mountainous treeline ecotone as revealed by spatially explicit tree aboveground biomass modeling Open
The subarctic forest tundra transition zone is one of the most vulnerable ecological regions worldwide and susceptible to climate change. Forest changes could lead to biodiversity losses when tundra areas become colonized. However, the imp…