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Introduction
Skills and Expertise
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January 2008 - present
October 2007 - December 2007
Publications
Publications (41)
The Yedoma Ice Complex in northern Yakutia provides perfect preservation conditions for frozen remains of vertebrate animals. Even complete mummified specimens of the late Pleistocene Beringian Mammoth fauna such as woolly mammoth, woolly rhinoceros, horse, and bison are occasionally found in permafrost deposits across eastern Siberia, i.e., in Wes...
We studied heavy and light mineral associations from two grain-size fractions (63–125 μm, 125–250 µm) from 18 permafrost sites in the northern Siberian Arctic in order to differentiate local versus regional source areas of permafrost aggradation on the late Quaternary time scale. The stratigraphic context of the studied profiles spans about 200 ka...
Arctic cyclones, as a prevalent feature in the coupled dynamics of the Arctic climate system, have large impacts on the atmospheric transport of heat and moisture and deformation and drifting of sea ice. Previous studies based on historical and future simulations with climate models suggest that Arctic cyclogenesis is affected by the Arctic amplifi...
The present study examines the formation history and
cryolithological properties of the late-Pleistocene Yedoma Ice Complex (IC) and
its Holocene cover in the eastern Lena delta on Sobo-Sise Island. The
sedimentary sequence was continuously sampled at 0.5 m resolution at a
vertical Yedoma cliff starting from 24.2 m above river level (a.r.l.). The
s...
The present study examines the formation history and cryolithological properties of late Pleistocene Yedoma Ice Complex (IC) and its Holocene cover in the eastern Lena Delta on Sobo-Sise Island. The sedimentary sequence was continuously sampled in 0.5 m resolution at a vertical Yedoma cliff starting from 24.2 m above rivel level (arl). The sequence...
The late Pleistocene Yedoma Ice Complex is an ice-rich and organic-bearing
type of permafrost deposit widely distributed across Beringia and is
assumed to be especially prone to deep degradation with warming
temperature, which is a potential tipping point of the climate system. To better
understand Yedoma formation, its local characteristics, and i...
![(a and b) Vertical temperature ([K]) and (c and d) specific humidity (...](publication/339908755/figure/fig3/AS:1098678425124866@1638956757832/a-and-b-Vertical-temperature-K-and-c-and-d-specific-humidity-g-kg-profile_Q320.jpg)
A coordinated regional climate model (RCM) evaluation and intercomparison project based on observations from a July–October 2014 trans‐Arctic Ocean field experiment (ACSE‐Arctic Clouds during Summer Experiment) is presented. Six state‐of‐the‐art RCMs were constrained with common reanalysis lateral boundary forcing and upper troposphere nudging tech...
Differentiating thermokarst basin sediments with respect to the involved processes and environmental conditions is an important tool to understand permafrost landscape dynamics and scenarios and future trajectories in a warming Arctic and Subarctic. Thermokarst basin deposits have complex sedimentary structures due to the variability of Yedoma sour...
Air temperature at 2-m (T2) in the Arctic represents its local climate. Its quantification is one of the major criteria to evaluate the performance of numerical models in reflecting the complex physical and dynamical processes associated with the surface energy balance. This study uses HIRHAM5 regional climate model to simulate the Arctic climate d...
The ability of state-of-the-art regional climate models (RCMs) to simulate the trends of intense cyclone activity in the Arctic is assessed based on an ensemble of 13 simulations from 11 models from the Arctic-CORDEX initiative. Some models employ large-scale spectral nudging techniques. Cyclone characteristics simulated by the ensemble in winter a...
Permafrost warming has the potential to amplify global climate change, because when frozen sediments thaw it unlocks soil organic carbon. Yet to date, no globally consistent assessment of permafrost temperature change has been compiled. Here we use a global data set of permafrost temperature time series from the Global Terrestrial Network for Perma...
Ground ice and sedimentary records of a pingo exposure reveal insights into Holocene permafrost, landscape and climate dynamics. Early to mid‐Holocene thermokarst lake deposits contain rich floral and faunal paleoassemblages, which indicate lake shrinkage and decreasing summer temperatures (chironomid‐based TJuly) from 10.5 to 3.5 cal kyr BP with t...
The ability of state-of-the-art regional climate models to simulate cyclone activity in the Arctic is assessed based on an ensemble of 13 simulations from 11 models from the Arctic-CORDEX initiative. Some models employ large-scale spectral nudging techniques. Cyclone characteristics simulated by the ensemble are compared with the results forced by...
![Time series of frequency of extreme cyclone events [events/year] over...](publication/319252413/figure/fig1/AS:1132461811597316@1647011344557/Time-series-of-frequency-of-extreme-cyclone-events-events-year-over-1979-2015-for_Q320.jpg)
Typically 20–40 extreme cyclone events (sometimes called 'weather bombs') occur in the Arctic North Atlantic per winter season, with an increasing trend of 6 events/decade over 1979–2015, according to 6 hourly station data from Ny-Ålesund. This increased frequency of extreme cyclones is consistent with observed significant winter warming, indicatin...
Permafrost is one of the most important components of Arctic land. Regional atmosphere-snow-permafrost interactions can be best studied with Regional Climate Models (RCMs) due to their higher horizontal resolution compared to Global Climate Models. The development of Arctic RCMs with sophisticated land models is therefore very important. Comparing...
The Central Yakutian permafrost landscape is rapidly being modified by land use and global warming, but small-scale thermokarst process variability and hydrological conditions are poorly understood. We analyze lake-area changes and thaw subsidence of young thermokarst lakes on ice-complex deposits (yedoma lakes) in comparison to residual lakes in a...
Central Yakutian permafrost landscapes are subject to rapid modifications as a result of intensive land use, extreme weather, and the current global warming. With regard to the predicted increase in precipitation and temperature due to climate change, understanding the spatio-temporal variability of thermokarst processes is required. Regionally, we...
In the Arctic, climate change manifests with the strongest warming trends on the globe, especially in the cold season. It is under debate if climate extremes change similarly strong. Our study provides detailed regional information about two selected temperature extreme indices in the Arctic, namely warm and cold spells in winter and summer. We ana...
Characteristics of cyclones (frequency, intensity and size) and their changes in the Arctic region in a warmer climate have been analyzed with the use of the HIRHAM regional climate model simulations with SRES-A1B anthro-pogenic scenario for the twenty first century. The focus was on cyclones for the warm (April–September) and cold (October–March)...
This paper evaluates the simulated Arctic land snow cover duration, snow water equivalent, snow cover fraction, surface albedo, and land surface temperature in the regional climate model HIRHAM5 during 2008–2010, compared with various satellite and reanalysis data and one further regional climate model (COSMO-CLM). HIRHAM5 shows a general agreement...
While wave heights globally have been growing over recent decades, observations of their regional trends vary. Simulations of future wave climate can be achieved by coupling wave and climate models. At present, wave heights and their future trends in the Arctic Ocean remain unknown. We use the third-generation wave forecast model WAVEWATCH-III forc...
The ESA Data User Element (DUE) Permafrost project provides a
Circumpolar remote sensing service for permafrost-related applications.
The data products are freely downloadable
(http://www.ipf.tuwien.ac.at/permafrost) and published at the PANGAEA
World Data Centre (DUE Permafrost Project Consortium, 2012). Remote
sensing products are land surface te...
Rapid climate change in the Arctic during the last decades is one of the
most noticeable manifestations of global warming. Therefore, the model
assessments of extreme storm events and associated sea wave activity
have very important implications for the possible projection of the
shelf exploration and marine navigation in the Arctic basin (includin...
This paper discusses the effects of vegetation cover and soil parameters on the climate change projections of a regional climate
model over the Arctic domain. Different setups of the land surface model of the regional climate model HIRHAM were realized
to analyze differences in the atmospheric circulation caused by (1) the incorporation of freezing...
A regional climate model with high horizontal resolution (25 km) is used to downscale 20-year-long time slices of present-day (1980-1999) and future (2046-2065,2080-2099) Arctic climate, as simulated by the ECHAM5/MPI-OM general circulation model under the A1B emission scenario. Changes in simulated air temperature and derived indices at the end of...
The ESA DUE Permafrost project (2009-2011) is developing a suite of
parameters indicative of the subsurface phenomenon permafrost using
satellite remote sensing: Land Surface Temperature (LST), Surface Soil
Moisture (SSM), Surface Frozen and Thawed State (Freeze/Thaw), Terrain,
Land Cover (LC), and Surface Water (SW). Snow parameters (Snow Extent
a...
The Ebersbrunn diatreme near Ebersbrunn, western Saxony, Germany, causes an elliptical Bouguer anomaly of about -2.5 m Gal, which covers an area of approximately 2.2 km × 2 km and an elliptical magnetic anomaly with values between -250 nT and 1000 nT about half a kilometre smaller in diameter and situated within the southern part of the Bouguer ano...
![Table 3 . Seasonal Trends of Frost Days [Days/Decade] in Spring and...](profile/Heidrun-Matthes/publication/268384366/figure/tbl1/AS:668908000382977@1536491503075/Seasonal-Trends-of-Frost-Days-Days-Decade-in-Spring-and-Autumn-Covering-Different_Q320.jpg)
![Table 5 . Seasonal Trends of Cold Spell Days [Days/Decade] Covering...](profile/Heidrun-Matthes/publication/268384366/figure/tbl2/AS:668908000407553@1536491503095/Seasonal-Trends-of-Cold-Spell-Days-Days-Decade-Covering-Different-Time-Periods_Q320.jpg)
![Table 6 . Seasonal Trends of Warm Spell Days [Days/Decade] Covering...](profile/Heidrun-Matthes/publication/268384366/figure/tbl3/AS:668908000382979@1536491503127/Seasonal-Trends-of-Warm-Spell-Days-Days-Decade-Covering-Different-Time-Periods_Q320.jpg)
This paper discusses results of a simulation with the regional climate model HIRHAM for 1958-2001, driven by the ECMWF reanalysis (ERA40) data over the Arctic domain. The aim is to analyze the ability of the model to capture certain features of climate extremes derived from daily mean, maximum and minimum temperatures. For this purpose, a range of...
Regional-scale interannual variability of the seasonal air temperature and the intra-seasonal extreme temperature range and their seasonality were investigated for the pan-Arctic and also (in more detail) for Russian Arctic land. Daily mean, minimum, and maximum temperatures were obtained from the 'Global Summary of Day' station data set for the pe...
The Arctic has now generally been accepted as an area very sensitive to climate change. This includes changes in climate extremes. As extreme climate events directly impact on the residents, their investigation is important to understand ecological and societal changes. In this study, the focus is on understanding of the climate variability of extr...
In the area of the Rostock-Leipzig-Regensburg fault zone (Germany)
several centres of seismic activity are found with seismicity
manifesting itself in swarm earthquakes. The occurrence of these
earthquakes is globally linked to ascending magma and magmatic fluids.
Information is scarce regarding the depth and geometry of the magmatic
source, dynami...
Simulations with global circulation models (GCMs) clearly indicate that
major climate changes in polar regions can be expected during the 21st
century. Model studies have shown that the area of the Northern
Hemisphere underlain by permafrost could be reduced substantially in a
warmer climate. However, thawing of permafrost, in particular if it is
i...
Arctic temperature is analyzed in view of its extremes based on climate indices derived from daily mean, maximum, and minimum temperature. This analysis is done for the pan Arctic domain and region-specific for the eastern and western Russian Arctic. The variability of temperature-related indices over the last four decades is presented, in which th...
Based on results of previous investigations of tephra-tuff volcaniclastic deposits and a geophysical survey in the surroundings of the Železná hůrka Quaternary volcano, West Bohemia, we performed detailed geophysical surveys using gravimetry, magnetometry and electrical conductivity techniques. Striking anomalies were revealed in a morphological de...
Projects
Projects (2)
PolarRES will study the interactions between the atmosphere, oceans, and sea ice in the Arctic and Antarctic to provide new insights into the key physical and chemical processes of these interactions on a local and regional level. We will assess how the processes respond to and influence projected changes in the global circulation and what this means for the society and the environment.
