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The main objective of the expedition was to compare as large a series of islands of different climatic conditions, ages and geological origins as possible. This necessitated short visits to each selected island. The structure and components of the ecosystem under study were the focus of attention, while their functioning was considered to be of secondary importance.

On 11 November 2014, a remarkable event occurred. President Barack Obama of the United States and President Xi Jinping of China announced a bilateral agreement to reduce the emission of greenhouse gases (GHGs) that cause global warming by their respective nations. On 12 December 2015, a year and a month later, representatives of 195 countries attending the 21st Conference of the Parties of the United Nations Framework Convention on Climate Change meeting in Paris, France, announced the Paris Climate Agreement. The goal of the Paris Climate Agreement is to limit the future emission of GHGs such that the rise in global mean surface temperature will be no more than 1.5 °C (target) or 2.0 °C (upper limit) above the pre-industrial level. The Paris Climate Agreement utilizes an approach for reducing the emissions of GHGs that is distinctly different than earlier efforts. The approach for Paris consists of a series of Intended Nationally Determined Contributions (INDCs), submitted by the world’s nations, reflecting either a firm commitment (unconditional INDCs) or a plan contingent on financial and/or technological support (conditional INDCs). The Obama–Xi announcement was instrumental in the framing of the Paris Climate Agreement. The INDCs submitted by the USA and China were built closely upon the November 2014 bilateral announcement. China and the USA rank number one and two, respectively, in terms of national emission of GHGs. Practically speaking, unified global action to combat global warming required these two nations to get on the same page.

Protected natural areas deserve the combination of nature uniqueness and conservation willing. The foundation stone for National Parks is the awareness of that unique character—actual or presumed, most times based on non-tangible properties or singularities —grown in some social sectors, followed by the aim of preserving particular biota, singular ecosystems or entire landscapes. This was the case for the Aigüestortes i Estany de Sant Maurici National Park. Like other protected areas in alpine mountains, its apparent wilderness was a key factor in declaring it National Park, in 1955. The rough relief carved in the Maladeta granodiorite batholith, including rocky crests and summits, steep slopes and glacial valley bottoms, had for long grabbed attention. The abundance of alpine lakes and other water-related systems must have been particularly attractive, in comparison with other Iberian mountains, and even with other Pyrenean areas.

The chapters of this book are derived from the UArctic Congress 2016 science sessions, focusing on themes identified in the report of the International Conference on Arctic Research Planning (ICARP III) that was published in 2015. Themes address the changes and developments as well as the challenges and opportunities that are taking place in today’s global world. The Arctic is changing faster than any other region in the world. Its climate is changing in a speed that cannot be found anywhere else, affecting either directly or indirectly to almost everyone and everything. How can the Arctic societies and cultures, ecosystems, and environments cope with these fast changes? This book is divided into six thematic parts reflecting the congress themes: Vulnerability of the Arctic Environments, Vulnerability of the Arctic Societies, Building the Long-Term Human Capacity, Arctic Safety, and Arctic Tourism. The final part of the book “Circumpolar, Inclusive and Reciprocal Arctic” looks at the Arctic in the light of the UArctic’s mission and values; Gunhild Hoogensen Gjørv, professor of political sciences, addresses a number of issues surrounding the implementation of gender perspectives in the Arctic research, and Ulunnguaq Markussen, UArctic Student Ambassador, calls for an Arctic awakening of peoples in the era when Arctic is seen as a place for natural resource extraction and economic benefits.

Human-caused climate change is perhaps the defining environmental issue of the early twenty-first century. We observe the earth’s climate in the present, but observations of future climate are not available yet. So in order to predict the future, we rely on simulation models to predict future climate. This book is designed to be a guide to climate simulation and prediction for the non-specialist and an entry point for understanding uncertainties in climate models. The goal is not to be simply a popular guide to climate modeling and prediction, but to help those using climate models to understand the results. This book provides background on the earth’s climate system and how it might change, a detailed qualitative analysis of how climate models are constructed, and a discussion of model results and the uncertainty inherent in those results. Throughout the text, terms in bold will be referenced in the glossary. References are provided as footnotes in each chapter. Who uses climate models? Climate model users are practitioners in many fields who desire to incorporate information about climate and climate change into planning and management decisions. Users may be scientists and engineers in fields such as ecosystems or water resources. These scientists are familiar with models and the roles of models in natural science. In other cases, the practitioners are engineers, urban planners, epidemiologists, or architects. Though not necessarily familiar with models of natural science, experts in these fields use quantitative information for decision-making. These experts are potential users of climate models. We hope in the end that by understanding climate models and their uncertainties, the reader will understand how climate models are constructed to represent the earth’s climate system. The book is intended to help the reader become a more competent interpreter or translator of climate model output.