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Note: Enthaltener Beitrag: Russian-German Cooperation SYSTEM LAPTEV SEA: The Expedition COAST I / edited by Paul Overduin , Enthaltener Beitrag: The Expedition Lena 2005 / edited by Lutz Schirrmeister, Dirk Wagner, Mikhail N. Grigoriev and Dimitry Yu. Bolshiyanov , Enthaltener Beitrag: Russian-German cooperation Yakutsk - Potsdam: the expedition CENTRAL YAKUTIA 2005 / edited by Bernhard Diekmann, Sebastian Wetterich and Frank Kienast , Contents for "Russian-German Cooperation SYSTEM LAPTEV SEA: The Expedition COAST I" The Expedition COAST I 1. Background and Objectives 2. Logistics and Itinerary 3. Field Methods and Sample Recovery 3.1 Coring 3.2 Pore water analyses 3.3 Temperature profiles 4. Sample lists , Contents for "The Expedition Lena 2005" The Expedition Lena 2005 1. Introduction 2. Expedition itinerary and general logistics 3. Microbiological processes, trace gas fluxes and hydrobiology in permafrost ecosystems of the Lena Delta 3.1 Introduction 3.2 Dynamic of methane oxidising communities in permafrost soils 3.2.1 Introduction 3.2.2 Sampling procedure and field parameters 3.2.3 Pore water methane concentration 3.2.4 Sample processing and analyses 3.3 Microbial studies on nitrification from permafrost environments 3.3.1 Introduction 3.3.2 Field experiments: Impact of polygonal soil parameter on nitrification 3.4 Closed chamber measurements of carbon exchange between Arctic tundra and the atmosphere 3.5 Micrometeorological measurements of energy, water, and carbon exchange between Arctic tundra and the atmosphere 3.6 Energy and water budget of permafrost soils – long time meteorology and soil survey station on Samoylov Island 3.7 Isotopic Studies on the 13C-fractionation during CH4-production in polygonal and thermokarst lakes of the Lena Delta 3.7.1 Introduction and methods 3.7.2 Preliminary results and further plans 3.8 Hydrobiological investigations on Samoylov Island 3.8.1 Objectives 3.8.2 Research tasks 3.8.3 Material and methods 3.8.4 Preliminary results 3.9 References 4. Studies of periglacial landscape dynamics and surface characteristics studies in the western Lena Delta 4.1. Scientific background and objectives 4.2. Geological and geographical characteristics 4.3. Studies of oriented lakes and thermokarst depressions 4.3.1 Background 4.3.2 Study area 4.3.3 Topographical and geomorphological settings 4.3.3.1 Depressions 1, 2 and 3 4.3.3.2 Depression 4 4.3.3.3 Depression 5 4.3.4 Bathymetrical surveys 4.3.5 Field sampling 4.4. Characteristics and spectral properties of periglacial landforms 4.4.1 Introduction 4.4.2 Methods 4.4.3 First results 4.5. Studies of permafrost sequences for paleo-environmental reconstruction 4.5.1 The “Arga-Sands” on Turakh Island 4.5.1.1 Exposure Tur-1 4.5.1.2 Core Tur-2 4.5.1.3 Exposure T021 4.5.2 Sand sequences of Ebe Basyn Sise Island 4.5.2.1 Exposure Ebe-4 4.5.2.2 Exposure Ebe-2 4.5.2.3 Exposure Ebe-3 4.5.2.4 Exposure Ebe-5 4.5.3 Sand and Ice Complex sequences of Khardang Island 4.5.3.1 The sand deposits in the exposure Kha-1 4.5.3.2 The sequence Kha-2 4.5.3.3 Exposure Kha-3: large ice wedge and surrounding sediments 4.6 Subsurficial and bathymetrical Ground Penetrating Radar (GPR) Investigations 4.6.1 Subsurface mapping of the Arga sands stratigraphical unit 4.6.1.1 GPR survey configuration 4.6.1.2 Transects at exposure Ebe-4 4.6.1.3 Transects at exposure/borehole Tur-1/Tur-2 4.6.2 Arynskaya Channel bathymetry 4.7 Measuring of local weather and soil conditions by soil probe and weather station 4.8 Palaeontological collection of the “Mammoth” fauna from the museum of the Lena Delta Reserve 4.9 References 4.10 Appendices chapter 4 Appendix 4-1: Field spectrometry – description of measuring points and profiles (see chapter 4.4) Appendix 4-2: List of sediment samples (see chapter 4.5) Appendix 4-3: Modern soil profiles and surface samples Appendix 4-4: List of ground ice and surface water samples Appendix 4-5. Bone collection of the expedition LENA 2005 Appendix 4-6: Bone collection of Lena Delta Reserve Tiksi (see chapter 4.8) 5. Holocene ice wedges of the 1st Lena terrace 5.1 Introduction 5.2 Outcrops 5.2.1 Outcrop 1 5.2.2 Outcrop 2 5.2.3 Geocryolithology on Samoylov Island: General impressions 5.2.4 Outcrop 3 5.2.5 Outcrop 4 5.2.6 Outcrop 5 5.2.7 Outcrop 6 5.2.8 Outcrop 7 5.2.9 Outcrop 8 5.2.10 Outcrop 9 5.2.11 Outcrop 10 5.2.12 Pingo at Olenyekskaya Channel 5.2.13 Summary 5.3 Studies on recent cryogenesis on Samoylov Island 5.4 References 5.5 Appendices chapter 5 Appendix 5-1: Ice sample list Appendix 5-2: List of sediment samples and ice content measurement Appendix 5-3: List of water samples 6. Report of the hydrological work in the Lena River Delta in August 2005 6.1 Introduction 6.2 Methods 6.3 Preliminary results 6.4 Conclusion , Contents for "Russian-German cooperation Yakutsk - Potsdam: the expedition CENTRAL YAKUTIA 2005" Central Yakutia 2005 1. Expedition ‘Verkhoyansk 2005’ • Limnogeological studies at Lake Billyakh, Verkhoyansk Mountains, Yakutia 1.1 Introduction 1.2 Regional Setting of Lake Billyakh 1.3 Itinerary 1.4 Methods 1.4.1 Bathymetric measurements 1.4.2 Water sampling and measurements 1.4.3 Sediment coring 1.5 Results 1.5.1 Bathymetry 1.5.2 Water profiles 1.5.3 Sediment cores 1.6 Outlook 1.7 References 2 Limnological studies in Central and North-east Yakutia in summer 2005 2.1 Introduction 2.2 Study sites and lake types 2.3 Material and methods 2.4 Preliminary results 2.5 Outlook 2.6 References 2.7 Appendices Appendix 2-1: General characteristics and geographical position of the studied lakes in Central and North-east Yakutia Appendix 2-2: Some properties of the studied lakes in Central and North-east Yakutia, obtained during the fieldwork (unfilled table cells imply no data or information) Appendix 2-3: Sample list for further analyses on sediments, hydro-chemistry, water isotopes and aquatic organisms Appendix 2-4: Occurrence of zoobenthos organisms in the sampled Central-Yakutian lakes in July 2005 3. Vegetation studies in extremely continental regions of Yakutia 3.1 Introduction 3.2 Study areas and investigated vegetation types 3.3 Material and methods 3.4 Preliminary results 3.5 Appendix 3-1: Metadata of studied vegetation records

Note: Dissertation, Universität Potsdam, 2019 , Table of Contents Abstract Zusammenfassung 1 Introduction 1.1 Scientific background 1.1.1 Permafrost - terrestrial and subsea 1.1.2 Subsea permafrost distribution 1.1.3 Relevance in the context of a changing Arctic 1.1.4 Influences on subsea permafrost 1.2 Hypotheses and objectives 1.3 Thesis organization 2 Detection of subsea permafrost degradation rates 2.1 An overview of geophysical methods and studies in subsea permafrost 2.2 Geophysical objectives 2.3 Passive seismic techniques 2.3.1 H/V passive seismics 2.3.2 Passive seismic interferometry 2.4 Instrument design & marine tests on Sylt 2.5 Arctic feasibility test site around Muostakh Island 2.6 Arctic deployment for wide area detection around Muostakh Island 3 Modelling of subsea permafrost degradation processes 3.1 An overview on subsea permafrost modelling 3.2 Salt distribution- mechanisms beyond diffusional transport 3.3 Open questions in salt transport and permafrost degradation 3.4 Modelling objectives 3.5 Study sites 3.5.1 Primary study site: Cape Mamontov Klyk 3.5.2 Secondary study sites: Buor Khaya & Muostakh Island 3.6 Developing a model for subsea permafrost 3.6.1 Thermal regime of the subsurface: governing equations of conductive heat transfer 3.6.2 Model definitions: concentration and thaw depth 3.6.3 Saline effect on the state of permafrost 3.6.4 Salt transport: governing equation & parameterizations 3.6.5 Modelling approach 3.6.6 Model testing 3. 7 Results: Influence of model parameters on subsea permafrost degradation 3.8 Discussion and implications 3.8.1 Modelled inundation parameters 3.8.2 Further factors affecting subsea permafrost degradation 3.8.3 Implications 4 From local to regional scale: Amending sparsely distributed temperature records 4.1 An overview of borehole temperature reconstruction . 4.2 On the transferability of ground to air temperatures . 4.3 Reconstruction objectives 4.4 Borehole sites and climate 4.5 Borehole temperatures 4.6 Inversion method 4.6.1 Forward model 4.6.2 Optimization 4.6.3 Sensitivity analysis 4.7 Results and discussion of the reconstruction from the permafrost boreholes 4.7.1 Recoverable period 4.7.2 Optimization 4.7.3 Surface temperature reconstructions and fit 4.7.4 Inversion method's impact on character of solution & sensitivity to temperature history parameterization 4.8 Discussion of spatial differences and implications 4.8.1 Comparison to other temperature data 4.8.2 Site differences 4.8.3 Methodological considerations 4.8.4 Implications 5 Conclusion and outlook 5.1 Outlook Appendices A Modelling tests for H/V method configuration Bibliography Acknowledgements