Earth System Science Bridging The Gaps Between Disciplines

Earth system science is traditionally split into various disciplines (Geology, Physics, Meteorology, Oceanography, Biology etc.) and several sub-disciplines. Overall, the diversity of expertise provides a solid base for interdisciplinary research. However, gaining holistic insights into the Earth system requires the integration of observations, paleoclimate data, analysis tools and modeling. These different approaches of Earth system science are rooted in various disciplines that cut across a broad range of timescales. It is, therefore, necessary to link these disciplines at a relatively early stage in PhD programs. The linking of ‘data and modeling’, as it is the special emphasis in our graduate school, enables graduate students from a variety of disciplines to cooperate and exchange views on the common theme of Earth system science, which leads to a better understanding of processes within a global context.

This book describes the latest advances at the Helmholtz “Earth System Science Research School” where scientists from the Alfred Wegener Institute in Bremerhaven, the University of Bremen, and the Jacobs University are involved in research. One of the greatest challenges is understanding ongoing environmental changes. The longer the time scale the more components of the Earth system are involved, e.g. interannual and decadal variations are related to the coupled atmosphere-ocean-sea ice system, whereas longer variations like glacial-interglacial or Cenozoic transitions involve the carbon cycle, ice sheets and gateways. In order to get deep insights into Earth system science, observations, remote sensing, past environmental data, as well as modeling need to be integrated. These different approaches are traditionally taught in separated disciplines at bachelor and master levels. It is, therefore, necessary to bring these disciplines together in PhD programs.

This comprehensive compendium overviews the complexity and uncertainty of groundwater systems, including groundwater boundaries, runoff, media, dynamic and chemical field, and stress and thermal field. The research methods and study examples were also introduced in great detail.The unique reference text is a valuable resource for researchers, academics, professionals, undergraduate and graduate students devoted to groundwater system study and complexity science.

The work addresses the following questions in the context of interglacial climate dynamics: (i) What are the amplitudes of natural climate variations on timescales of several years to millennia? (ii) Do abrupt changes in the large-scale circulation of the Atlantic Ocean occur in interglacials? (iii) Which biogeochemical feedback mechanisms control the natural limits of atmospheric concentrations of greenhouse gases and aerosols? (iv) Which linkages exist between climate and pre-industrial cultures? The work is based on an integrated approach in paleoclimate research, in which all available paleoclimate archives (terrestrial and marine as well as ice cores) are combined in order to yield a comprehensive and quantitative analysis of global environmental variations. Moreover, through a close linkage be-tween paleoclimate reconstructions and results from Earth-system models detailed insights into the dynamics of climate variations are gained.

Applied geomorphology aims to understand the constraints that natural dynamics impose on human activities, as well as societal impacts on geomorphic forms and processes. It is therefore concerned with the analysis and interpretation of landforms resulting from the interaction between anthropic and non-anthropic (so-called natural) processes, using methodologies specific to this scientific area. This book provides a comprehensive overview of applied geomorphology. It includes five chapters that address such topics as geodiversity as a tool for nature conservation, geoheritage and its enhancement in the context of geotourism, piles as structural elements, slope stability, and landslides.

A state-of-the-art overview of the influence of terrestrial vegetation and soils within the Earth system. The text deals especially with interactions between the terrestrial biosphere and the atmosphere via the hydrological cycle and their interlinkage with anthropogenic activities. Measurements gathered in integrated field experiments in the Sahel, the Amazon, North America and South-east Asia confirm the importance of these interactions. Observations are complemented by modelling studies, including regional models that simulate flows and transport in river catchments, coupled land-cover and regional climate systems, and Earth-system and global circulation models. Water, nutrient and sediment fluxes in river basins are also discussed and are shown to be highly impacted and regulated by humans through land use, pollution and river engineering. Finally, the book discusses environmental vulnerability and methodologies for assessing the risks associated with regional and global climatic and environmental variability and change. The results reported in this book are based on the research work of many individual scientists and teams around the world associated with the objectives of the IGBP-BAHC and WCRP-GEWEX international research programmes.

This volume includes revised versions of most of the presentations made at the International Conference «Understanding the Earth Sys tem: Compartments, Processes and Interactions" held on November 24-26, 1999 in Bonn. The Conference was organized by the German National Committee on Global Change Research as part of the Bonn Science Festival 1999-2000. The Bonn Science Festival (Wissen schaftsfestival Region Bonn) was organized and funded by sfg Strukturforderungsgesellschaft Bonn/Rhein-Siegl Ahrweiler mbH. The generous support for organizing the conference and printing this volume by sfg is gratefully acknowledged. Additional financial and organizational support for separate workshop sessions and publica tions have also been provided by the German Federal Ministry for Science and Research, BMBF and Germany's major research funding agency, Deutsche Forschungsgemeinschaft. The editors wish to gratefully acknowledge the help, advice and especially patience of many individuals who have contributed to this volume. The contributions are intended to document the debate on crucial issues of the emerging concept of earth system science and to stimulate the necessary scientific discussion. While every effort has been made on the part of the editors to ensure consistency in termi nology, style and methods of quotation, the variety of contributors has inevitably resulted in certain discrepancies. E. EHLERS Bonn, February 2001 T. KRAFFT Contents Part I Panorama: The Earth System: Analysis from Science and the Humanities Chapter 1 Understanding the Earth System - From Global Change Research to Earth System Science . . . . . . . 3 E. EHLERS and T. KRAFFT Chapter 2 Earth System Analysis and Management. . . . . . . . . . . . .. . . . 17 . . .

First published in 1992. In 1972, the UN Conference on the Human Environment initiated the process of world environmental cooperation. This study is about GEMS (the Global Environment Monitoring System) which the Conference recommended be set up to generate data and information necessary for worldwide environmental assessment. This book examines the genesis and evolution of GEMS, and the complex task involved in establishing GEMS and making it perform its functions. It relates GEMS to the factors which have shaped the international environmental agenda and cooperation since 1972. In particular, it highlights North-South differences and the problems inherent in the international organizations belonging to the UN system, vis-á-vis the novel and multifaceted challenges involved in dealing with systemic, cross-sectoral nature of global environmental problems. The lessons of GEMS and other issues presented in this book are highly relevant to the continuing efforts to set up effective programmes for ‘earthwatching’ and to promote international environmental cooperation. They also relate more broadly to the challenges of managing global interdependence and to the need to devise supporting organizational structures through reform and strengthening of the UN system. The comprehensive nature of the political and institutional analyses presented in this book make it an academic reference work of lasting value. Its frank tone and willingness to derive prescriptive conclusions will appeal in particular to the many actors engaged in the processes and structures of global multilateral cooperation. The book will be of special use to those interested in environmental issues and international organization