A5015590711- Climate change and permafrost
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Species Distribution and Climate Change
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Remote Sensing in Agriculture
- Urban Heat Island Mitigation
- Indigenous Studies and Ecology
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Polar Research and Ecology
- Arctic and Russian Policy Studies
- Geochemistry and Geologic Mapping
- Lichen and fungal ecology
- Arctic and Antarctic ice dynamics
- Scientific Computing and Data Management
- Space Exploration and Technology
- Environmental DNA in Biodiversity Studies
- Infrared Target Detection Methodologies
- Peatlands and Wetlands Ecology
- Rangeland and Wildlife Management
- Tree-ring climate responses
- Research Data Management Practices
- Marine and coastal plant biology
GFZ Helmholtz Centre for Geosciences
2020-2024
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2015-2020
University of British Columbia
2015
Queen's University
2014
Recent changes in climate have led to significant shifts phenology, with many studies demonstrating advanced phenology response warming temperatures. The rate of temperature change is especially high the Arctic, but this also where we relatively little data on phenological and processes driving these changes. In order understand how Arctic plant species are likely respond future climate, monitored flowering both experimental ambient for four widespread two habitat types over 21 years. We...
Abstract. The role of polar regions is increasing in terms megatrends such as globalization, new transport routes, demography, and the use natural resources with consequent effects on regional transported pollutant concentrations. We set up ERA-PLANET Strand 4 project “iCUPE – integrative Comprehensive Understanding Polar Environments” to provide novel insights observational data global grand challenges an Arctic focus. utilize integrated approach combining situ observations, satellite...
Abstract. The Lena Delta is the largest river delta in Arctic (about 30 000 km2) and prone to rapid changes due climate warming, associated cryosphere loss, ecological shifts. characterized by ice-rich permafrost landscapes consists of geologically geomorphologically diverse terraces covered with tundra vegetation active floodplains, featuring approximately 6500 km channels over lakes. Because its broad landscape habitat diversity, a biodiversity hotspot high numbers nesting breeding...
Arctic warming is leading to substantial changes permafrost including rapid degradation of ice and ice-rich coasts riverbanks. In this study, we present evaluate a high spatiotemporal resolution three-year time series X-Band microwave satellite data from the TerraSAR-X (TSX) quantify cliff-top erosion (CTE) an riverbank in central Lena Delta. We apply threshold on TSX backscatter images automatically extract lines derive intra- inter-annual CTE. order examine drivers statistically compare...
Arctic tundra ecosystems exhibit small-scale variations in species composition, micro-topography as well significant spatial and temporal moisture. These attributes result similar spectral characteristics between distinct vegetation communities. In this study we examine variability at three phenological phases of leaf-out, maximum canopy, senescence ground-based spectroscopy, a simulated Environmental Mapping Analysis Program (EnMAP) Sentinel-2 reflectance spectra, from five dominant...
Abstract Arctic vegetation phenology is a sensitive indicator of changing climate, and rapid assessment status necessary to more comprehensively understand the impacts on foliar condition photosynthetic activity. Airborne space‐borne optical remote sensing has been successfully used monitor in ecosystems by exploiting biophysical biochemical changes associated with growth senescence. However, persistent cloud cover low sun angles region make acquisition high‐quality temporal data within one...
Manual collection of accurate phenology data is time-consuming and expensive. In this study, we investigate whether repeat colour digital photography can be used (1) to identify phenological patterns, (2) differences in vegetation due experimental warming site moisture conditions, (3) as a proxy for biomass. Pixel values (RGB) were extracted from images taken permanent plots long-term experiments three tundra communities at high Arctic during one growing season. The Greenness Excess Index...
In December 2023, the Helmholtz SynCom (Synthesis and Communication) traveled to Brussels with a delegation of selected scientists from seven Earth Environment Centres. This visit aimed at sharing current research findings exchanging ideas members European Parliament other key stakeholders. The agenda included meetings various entities such as Commission’s Directorate-General for Defence Industry Space (DG DEFIS), Climate Action CLIMA), Agency (ESA), Niklas Nienaß Jutta...
Abstract. The role of polar regions increases in terms megatrends such as globalization, new transport routes, demography and use natural resources consequent effects regional transported pollutant concentrations. We set up the ERA-PLANET Strand 4 project iCUPE – integrative Comprehensive Understanding on Polar Environments to provide novel insights observational data global grand challenges with an Arctic focus. utilize integrated approach combining situ observations, satellite remote...
Abstract. The Lena Delta is the largest river delta in Arctic (about 30 000 km2) and prone to rapid changes due climate warming, associated cryosphere loss ecological shifts. characterized by ice-rich permafrost landscapes consists of geologically geomorphologically diverse terraces covered with tundra vegetation active floodplains, featuring approximately 6 500 km channels over lakes. Because its broad landscape habitat diversity a biodiversity hotspot high numbers nesting breeding...
Technology transfer (TT) between academia and industry is an important source of innovation economic development becoming increasingly relevant across a diversity research fields. Successful TT depends on effective communication academic external partners. This best facilitated by intermediary who can provide meaningful interactions. An ensure expertise knowledge are communicated using common language that goals expectations clear In the field remote sensing where complex technologies,...
High Arctic ecosystems are likely to experience some of the earliest and most extreme changes in climate as a result future global change. These will include both increases temperature precipitation. High-Arctic very sensitive climatic disruption, response these could have strong influence on climate. In particular, moisture cause active layer deepen enhanced permafrost melting. This deepening decrease stability shallow slopes leading soil disturbances known detachments.. We exploring impact...