ALBERT

Note: Contents: I INTRODUCTION. - 1 Ecosystem Response, Resistance, Resilience, and Recovery in Arctic Landscapes: Introduction / J. F. Reynolds and J. D. Tenhunen. - 1.1 Introduction. - 1.2 NRC Committee Report. - 1.3 The R4D Program. - 1.3.1 Objectives and Conceptual Framework. - 1.3.2 Program Implementation. - 1.3.3 Landscape Function. - 1.4 Summary. - References. - 2 Integrated Ecosystem Research in Northern Alaska, 1947-1994 / G. R. Shaver. - 2.1 Introduction. - 2.2 Early Days at NARL. - 2.3 The U.S. Tundra Biome Program. - 2.4 The Meade River RATE Program. - 2.5 Eagle Creek and Eagle Summit. - 2.6 The Arctic LTER Program at Toolik Lake. - 2.7 Other Studies In Alaska and Elsewhere. - 2.8 Summary and Prospects. - References. - 3 Disturbance and Recovery of Arctic Alaskan Vegetation / D. A. Walker. - 3.1 Introduction. - 3.2 Disturbance and Recovery. - 3.3Typical Disturbance and Recovery Patterns. - 3.3.1 Small Disturbed Patches. - 3.3.2 Contaminants. - 3.3.2.1 Hydrocarbon Spills. - 3.3.2.2 Seawater and Reserve-Pit Spills. - 3.3.3 Fire. - 3.3.4 Transportation Corridors. - 3.3.4.1 Bulldozed Tundra and Related Disturbances. - 3.3.4.2 Off-Road Vehicle Trails. - 3.3.4.2.1 Summer Travel. - 3.3.4.2.2 Winter Travel. - 3.3.4.3 Permanent Roads and Pads. - 3.3.4.4 Gravel Mines. - 3.3.4.5 Native Species in Revegetation of Gravel Pads and Mines. - 3.3.4.6 Road Dust. - 3.3.4.7 Roadside Impoundments. - 3.3.5 Cumulative Impacts. - 3.4 Conclusions. - References. - 4 Terrain and Vegetation of the Imnavait Creek Watershed / D. A. Walker and M. D. Walker. - 4.1 Introduction. - 4.2 Terrain. - 4.2.1 Glacial Deposits. - 4.2.2 Retransported Hillslope Deposits. - 4.2.3 Colluvial Basin Deposits. - 4.2.4 Floodplain Deposits. - 4.3 Vegetation. - 4.3.1 Flora. - 4.3.2 Vegetation Types. - 4.3.2.1 Lichen-Covered Rocks. - 4.3.2.2 Dry Heath. - 4.3.2.2.1 Exposed Sites. - 4.3.2.2.2 Snowbeds. - 4.3.2.3 Tussock Tundra. - 4.3.2.4 Riparian Areas. - 4.3.2.5 Mires. - 4.3.2.6 Beaded Ponds. - 4.4 West-Facing Toposequence. - 4.5 Terrain Sensitivity to Disturbance. - 4.6 Conclusions. - Appendix A. List of Plants for Imnavait Creek, Alaska. - References. - 5 Vegetation Structure and Aboveground Carbon and Nutrient Pools in the Imnavait Creek Watershed / S. C. Hahn, S. F. Oberbauer, R. Gebauer, N. E. Grulke, O. L. Lange, and J. D. Tenhunen. - 5.1 ntroduction. - 5.2 Description of Vegetation. - 5.3 Sampling Methods. - 5.3.1 Cover. - 5.3.2 Biomass and Nutrient Pools. - 5.4 Cover. - 5.5 Aboveground Biomass. - 5.5.1 Live Biomass. - 5.5.2 Photosynthetic Biomass. - 5.5.3 Lichen Biomass. - 5.5.4 Organic Litter. - 5.5.5 Watershed Patterns. - 5.6 Nutrient Pools. - 5.6.1 N and P in Heath Cryptogams. - 5.6.2 N and P in Communities. - 5.7 Discussion and Conclusions. - References. - II PHYSICAL ENVIRONMENT, HYDROLOGY, and TRANSPORT. - 6 Energy Balance and Hydrological Processes in an Arctic Watershed / L. Hinzmann, D. L. Kane, C. S. Benson, and K. R. Everett. - 6.1 Introduction. - 6.2 Radiation and Thermal Regimes. - 6.2.1 Surface Energy Balance. - 6.2.2 Snow Cover and Soil Thermal Regime. - 6.3 Hydrological Processes. - 6.3.1 Snowmelt. - 6.3.2 Plot and Basin Water Balance. - 6.3.3 Runoff and Basin Discharge. - 6.3.4 Precipitation, Evaporation, and Evapotranspiration. - 6.4 Energy Balance and Hydrology Models. - 6.4.1 Simulation of the Thermal Regime. - 6.4.2 Simulation of Snowmelt. - 6.4.3 Simulation of Catchment Runoff. - 6.5 Conclusions. - References. - 7 Shortwave Reflectance Properties of Arctic Tundra Landscapes / A. S. Hope and D. A. Stow. - 7.1 Introduction. - 7.2 Shortwave Reflectance Studies in Arctic Environments. - 7.2.1 Environmental Considerations. - 7.2.2 Radiometric Data. - 7.2.3 Image Data. - 7.3 Spectral Reflectance. - 7.3.1 Aboveground Biomass. - 7.3.2 Vegetation Composition. - 7.3.3 Landscape Patterns. - 7.3.4 Effects of Dust Deposition. - 7.4 Albedo. - 7.4.1 Undisturbed Tussock Tundra. - 7.4.2 Effects of Dust Deposition. - 7.5 Conclusions. - References. - 8 Isotopic Tracers for Investigating Hydrological Processes / L. W. Cooper, I. L. Larsen, C. Solis, J. M. Grebmeier, C. R. Olsen, D. K. Solomon, and R. B. Cook. - 8.1 Introduction. - 8.1.1 Units. - 8.1.2 Conservative vs Nonconservative Isotopes. - 8.2 Nonconservative Tracers. - 8.3 Sulfur-35. - 8.4 Oxygen-18. - 8.4.1 Oxygen-18 Content of Snowpack. - 8.4.2 Oxygen-18 Content of Imnavait Creek. - 8.4.3 Oxygen-18 Content of Soil Moisture. - 8.4.4 Covariance of Oxygen-18 and Deuterium in Watershed Compartments. - 8.4.5 Covariance of Oxygen-18 and Deuterium in Plant Water. - 8.5 Long-Lived Radioisotopes: Lead-210 and Cesium-137. - 8.5.1 Distribution of 137Cs on Tundra and in Lake Sediments. - 8.5.2 Cycling of 137Cs in Annual Berries. - 8.5.3 Distribution of 210Pb in Tundra. - 8.6 Conclusions. - References. - III NUTRIENT AND CARBON FLUXES. - 9 Surface Water Chemistry and Hydrology of a Small Arctic Drainage Basin / K. R. Everett, D. L. Kane, and L. D. Hinzman. - 9.1 Introduction. - 9.2 Watershed Instrumentation. - 9.3 Snowmelt Period. - 9.3.1 Snowmelt Hydrology. - 9.3.2 Snowmelt Chemistry . - 9.3.2.1 Overland Flow. - 9.3.2.2 Water Track Flow. - 9.3.2.3 Imnavait Creek Flow. - 9.4 Post Snowmelt Period. - 9.4.1 Atmospheric Inputs. - 9.4.1.1 Rainfall. - 9.4.1.2 Dry Deposition. - 9.4.1.3 Rime. - 9.4.2 Water Chemistry. - 9.4.2.1 Overland Flow. - 9.4.2.2 Active Layer Flow. - 9.4.2.3 Imnavait Creek Flow. - 9.5 Conclusions. - References. - 10 Nutrient Availability and Uptake by Tundra Plants / J. P. Schimel, K. Kielland, and F. S. Chapin III. - 10.1 Introduction. - 10.2 Controls on Mineralization and Nutrient Supply. - 10.2.1 Patterns of Nutrient Supply in the Soil. - 10.2.2 Patterns of Mineralization. - 10.2.3 Controls on N and P Mineralization. - 10.2.4 Controls on Decomposition and Mineralization. - 10.2.4.1 Temperature. - 10.2.4.1.1 Enzyme Activities. - 10.2.4.1.2 Microbial Activity at Low Temperatures. - 10.2.4.1.3 Freeze-Thaw Events. - 10.2.4.2 Effects of Low Oxygen on Microbial Activity and Mineralization. - 10.2.4.3 Substrate Quality. - 10.3 Fate of Available Nutrients. - 10.3.1 Microbial Nutrient Uptake and Competition with Plants. - 10.3.2 Plant Uptake. - 10.3.2.1 Soil Factors Controlling Nutrient Absorption. - 10.3.2.2 Rooting Strategies. - 10.3.2.3 Uptake Characteristics of Tundra Plants. - 10.3.2.4 Retranslocation vs Current Uptake. - 10.4 Disturbances. - 10.4.1 Vehicle Tracks. - 10.4.2 Road Dust. - 10.4.3 Gray Water. - 10.4.4 Climate Change. - References. - 11 Landscape Patterns of Carbon Dioxide Exchange in Tundra Ecosytems / S. F. Oberbauer, W. Cheng, C. T. Gillespie, B. Ostendorf, A. Sala, R. Gebauer, R. A. Virginia, and J. D. Tenhunen. - 11.1 Introduction. - 11.2 Methods. - 11.2.1 Community Types. - 11.2.2 Leaf Photosynthesis. - 11.2.3 Ecosystem Efflux. - 11.2.4 Ecosystem Net CO2 Exchange. - 11.3 CO2 Uptake. - 11.3.1 Factors Affecting CO2 Uptake. - 11.3.1.1 Light. - 11.3.1.2 Temperature. - 11.3.1.3 Phenology. - 11.3.1.4 Water Availability. - 11.3.1.5 Nutrition. - 11.3.2 Landscape Patterns in Leaf Photosynthesis. - 11.4 CO2 Efflux. - 11.4.1 Factors Affecting CO2 Efflux. - 11.4.1.1 Live Plant Biomass. - 11.4.1.2 Soil Quality. - 11.4.1.3 Thaw Depth and Depth to Water Table. - 11.4.1.4 Soil Moisture. - 11.4.1.5 Soil Temperature. - 11.4.2 Landscape Patterns of CO2 Efflux. - 11.4.3 Daily and Seasonal Patterns of CO2 Efflux. - 11.4.4 Dust Deposition Effects on CO2 Efflux. - 11.5 Landscape Patterns in Net CO2 Exchange. - 11.6 Conclusions. - References. - 12 Control of Tundra Methane Emission by Microbial Oxidation / S. C. Whalen, W. S. Reeburgh, and C. E. Reimers. - 12.1 Introduction. - 12.2 Sampling Procedure. - 12.3 Results and Discussion. - 12.3.1 Methane Flux and Environmental Variables in Tundra and Taiga. - 12.3.2 Physiology, Controls, and Potential for Microbial CH4 Oxidation. - 12.3.3 Methane Oxidation by Tundra Soils in a Warmer Climate. - 12.4 Conclusions. - References. - 13 Dynamics of Dissolved and Particulate Car

Note: Contents Editor's note Acknowledgements page xu Notes on translations and definitions Abstract Preface Introduction 1 Geocryology as part of planetary cryology 2 Frozen rocks as natural-historical geological formations 3 History of research of the zone of permafrost and the frozen materials composing this zone 4 Structure, problems and scientific themes of geocryology 5 Methodological basis of geocryology I Thermal-physical, physico-chemical and mechanical processes in freezing, frozen and thawing ground and their manifestation in the permafrost regions 1 Thermal-physical processes in freezing and thawing ground 1.1 Heat transfer and temperature field in ground 1.2 Freezing (crystallization) of water and melting of ice in the ground 1.3 Sublimation and desublimation of moisture in frozen rocks 1.4 Freezing and thawing of ground 1.5 Methods for solving soil freezing (thawing) problems and approximate formulae for freezing and thawing depth calculations 2 Water transfer and ice formation in soils 2.1 Nature and mechanism of moisture migration in soils 2.2 Water transfer and ice formation in frozen soil 2.3 Water transfer and ice formation in freezing and thawing soils 3 Physico-chemical and mechanical processes in freezing and thawing ground 3.1 Chemical reactions and processes in freezing and thawing soils 3.2 Physico-chemical and mechanical processes in freezing and thawing soils 3.3 Physical-mechanical processes in frozen soils caused by changes in temperature 3.4 Physical and chemical processes in frozen soils caused by an external load 4 Structure and texture of freezing and thawing soils 4.1 Thermal-physical and physical-mechanical conditions of development of migrational-segregated ice interlayers 4.2 Basic types of cryogenic structure 4.3 Formation of structure in freezing and thawing soils 4.4 Structural associations and types of contact in frozen soils 5 Cryogenic geological processes and phenomena 5.1 Classification of processes and phenomena 5.2 Frost heaving of soils 5.3 Frost cracking (fissuring) and polygonal formations, surface and underground 5.4 Thermokarst 5.5 Slope processes and phenomena 5.6 Processes and effects associated with the activity of water, glaciers and other geological agents II Composition, cryogenic structure and properties of frozen rocks 6 Formation of sedimentary materials in the permafrost regions (cryolithogenesis) 6.1 Sediment genesis in the permafrost regions 6.2 Transformation of loose deposits of the permafrost regions into rock 6.3 Formation of useful mineral deposits at different stages of cryogenesis 7 Composition and structure of frozen earth materials 7.1 Characteristics of organic, mineral and chemical composition of frozen earth materials 7.2 Unfrozen water and ice in ground 7.3 Textural characteristics of the frozen material 7.4 Microstructure of frozen soils 8 Properties of frozen soils 8.1 Physical properties of the frozen materials 8.2 Thermal-physical properties of rocks 8.3 Moisture exchange properties of soils 8.4 Mechanical properties of frozen ground 9 Characteristics of the basic genetic types of frozen ground 9.1 Features of the cryogenic types of frozen strata 9.2 Composition and cryogenic structure of the principal geologic-genetic types of sedimentary materials in the permafrost regions 9.3 Natural ice as a monomineral rock III Principles of the formation and development of the frozen strata and layers of seasonal freezing and thawing 10 Thermodynamic and climatic conditions for formation of the frozen layers 10.1 Energy balance of the Earth 10.2 Thermodynamic conditions for development of seasonally and perennially frozen ground 10.3 Frozen ground as a result of zonation of thermal- and mass-exchange processes on the Earth's surface and in the atmosphere 11 Seasonal freezing and thawing of ground 11.1 Formation of the layer of seasonal freezing and thawing of soil 11.2 Types of seasonal freezing and thawing of the ground 11.3 The influence oflandscape-climatic factors on the temperature regime and depth of seasonal freezing and thawing of the ground 12 Development of the temperature regime and the thickness of the permafrost 12.1 Present-day knowledge of the development of permafrost 12.2 The effect of boundary conditions on the permafrost thickness and temperature regime 12.3 Dependence of the permafrost thickness and temperature regime on geological factors and processes 13 Taliks and groundwater in the permafrost zone 13.1 The types and formation of taliks in the permafrost zone 13.2 Groundwater of the permafrost regions 13.3 Interaction of groundwater with the permafrost and types of cryohydrogeological structures IV Regional features and evolution of permafrost 14 Permafrost evolution in the Earth's history 14.1 History of the development of permafrost and its distribution on the planet 14.2 Reasons for the development and evolution of permafrost in the Earth's history 14.3 The history of geocryological development and the main stages of permafrost formation on the territory of the former USSR in the Late Cenozoic 15 Zonal and regional features of present-day geocryological conditions in the territories of the former USSR 15.1 Distribution of permafrost and spatial variations of its mean annual temperature 15.2 Structure of the permafrost and spatial variability of its thickness 15.3 Distribution of main types of seasonal ground thawing and freezing 16 Principles and methods for regional geocryological investigations 16.1 Geocryological survey as the basis for regional investigation of the seasonally and perennially freezing zones 16.2 The methods and carrying-out of geocryological surveys 16.3 Classification and regionalization in the course of geocryological survey 16.4 Regionalization in geocryological mapping V Rational use of frozen ground and environmental protection in the course of economic development of the permafrost regions 17 The effect of different types of development on the natural geocryological environment 17.1 The basic principles of rational use of frozen ground in the course of the economic development of the permafrost regions 17.2 Regional environmental change in the course of development of extensive areas within the permafrost zone 17.3 Economic development of the permafrost regions with various kinds of construction 17.4 Development in the permafrost regions for the mining industry and underground engineering 17.5 Types of agrobiological development in the permafrost regions 18 Ensuring the stability of engineering structures in the permafrost regions 18.1 Principles of construction on permafrost (bases and foundations) 18.2 Methods of amelioration of frozen ground for foundations 18.3 Principles of foundation design and selection of type of foundation for construction on permafrost 18.4 Normative documents for engineering design and construction in the permafrost regions 19 Engineering geology in support of design, construction and operation of structures in the permafrost regions 19.1 Engineering-geological survey in the permafrost regions 19.2 Forecasting change in the geocryological conditions in the course of development 19.3 Principles and methods of the control of cryogenic processes 19.4 The basis of the rational use and protection of the geological environment in the permafrost regions References Index