Studies of Sr isotopic composition of thousands of samples of marine sediments and fossils have yielded a curve of 87Sr/86Sr versus age for seawater Sr that extends back to 1 billion years. The ratio has fluctuated with large amplitude during this time period, and because the ratio is always uniform in the oceans globally at any one time, it is useful as a stratigraphic correlation and age-dating tool. The ratio also appears to reflect major tectonic and climatic events in Earth history and hence provides clues as to the causes, timing, and consequences of those events. The seawater 87Sr/86Sr ratio is generally high during periods marked by continent-continent collisions, and lower when continental topography is subdued, and seafloor generation rates are high. There is evidence that major shifts in the seawater ratio can be ascribed to specific orogenic events and correlate with large shifts in global climate.

Over million-year timescales, the geologic cycling of carbon controls long-term climate and the oxidation of Earth's surface. Inferences about the carbon cycle can be made from time series of carbon isotopic ratios measured from sedimentary rocks. The foundational assumption for carbon isotope chemostratigraphy is that carbon isotope values reflect dissolved inorganic carbon in a well-mixed ocean in equilibrium with the atmosphere. However, when applied to shallow-water platform environments, where most ancient carbonates preserved in the geological record formed, recent research has documented the importance of considering both local variability in surface water chemistry and diagenesis. These findings demonstrate that carbon isotope chemostratigraphy of platform carbonate rarely represent the average carbonate sink or directly records changes in the composition of global seawater. Understanding what causes local variability in shallow-water settings, and what this variability might reveal about global boundary conditions, are vital questions for the next generation of carbon isotope chemostratigraphers.

Our understanding of climate and its role in human affairs has changed markedly over recent years, as have climate observation systems and modelling capabilities. Reliance on recent weather statistics to provide a guide for future climate is no longer viable. Evidence of human-induced climate change has placed climate high on political and the media agendas. This text provides an account of what we know about climate and changing climates at the end of the 20th century. Integrating the historical and geographical dimensions of climate, the crucial link between past and future climatic conditions is examined through the geographical lens of the British Isles. Climates of past ages are reconstructed and full descriptions of the present climate are illustrated by graphs, maps and images. Important climate data sets are provided. Marking the 25th anniversary of the Climatic Research Unit, this book distils much of the leading research of present and recent members of the unit and presents a view of climatic change and prospects for the next millenium and beyond.

How did humankind deal with the extreme challenges of the last Ice Age? How have the relatively benign post-Ice Age conditions affected the evolution and spread of humanity across the globe? By setting our genetic history in the context of climate change during prehistory, the origin of many features of our modern world are identified and presented in this illuminating book. It reviews the aspects of our physiology and intellectual development that have been influenced by climatic factors, and how features of our lives - diet, language and the domestication of animals - are also the product of the climate in which we evolved. In short: climate change in prehistory has in many ways made us what we are today. Climate Change in Prehistory weaves together studies of the climate with anthropological, archaeological and historical studies, and will fascinate all those interested in the effects of climate on human development and history.

Magnesium is a major constituent in silicate and carbonate minerals, the hydrosphere and the biosphere. Magnesium is constantly cycled between these reservoirs. Since each of the major planetary reservoirs of magnesium have different magnesium isotope ratios, there is scope to use magnesium isotope ratios to trace 1) the processes that cycle Magnesium at a spatial scales from the entire planet to microscopic and 2) the relative fluxes between these reservoirs. This review summarises some of the key motivations, successes and challenges facing the use of magnesium isotopes to construct a budget of seawater magnesium, present and past.

IDEAL, the International Decade for East African Lakes, is a ten-year multi-national, multi-disciplinary investigation of the biological, geological, chemical, and physical limnology of the East African Lakes, taking into special account the Great Lakes of the East African Rift Valley and the climatology and paleoclimatology of the Rift Valley itself. The selected papers in this book serve as baseline knowledge for this intensive examination, with most of the contributing authors already actively researching these lakes. The oldest in the world and the largest on the continent, the lakes are vital resources for the indigenous populations of their basins. They are unique not only in their diverse populations of endemic species of fish and invertebrates, but in their sensitivity to climatic change, unusual circulation dynamics and water-column chemistry in relation to higher altitudes, and continuous record of climatic change in tropical Africa. This volume provides an overview of our current knowledge of the lakes combined with the most recent results of specific research efforts by African, American, and European investigators. Included also are some discussions on the impact of man, as well as comprehensive bibliographies.

The Handbook of Meteorology gives specialists and non-specialists alike a clear understanding of the way our weather functions. It provides scientific answers to questions that arise when looking at the world around us. It starts with the basics of weather-temperature, pressure, humidity, and wind-before moving on to cover highs, lows, fronts, and storms, and finally ending with a look at weather forecasts, cloud watching, weather tools, and much more. The Handbook of Meteorology provides a condensed but all-inclusive broad sweep of meteorology, employing several illustrations to translate detailed technical information into terms that everyone can follow and readily refer to. It is a comprehensive reference for any budding meteorologist or environmental professional in the field, laboratory, or classroom.

Why, despite all we know about the causes and harms of global heating, has so little effective action been taken to cut greenhouse gas emissions, and what we can do to change that? This book explains the mechanisms and impacts of the climate crisis, traces the history and reasons behind the lack of serious effort to combat it, describes some people's ongoing scepticism and how to shift it, and motivates an urgent program of action. It argues that the pathway to stopping dangerous global heating will require a much larger mobilization of advocacy and activism to impel decision makers to abandon fossil fuels, and transition to renewable energy and electrification embedded in a political and social framework guided by justice principles. It is an excellent resource for students and researchers on the climate crisis, the need for a renewable energy transition, and the current blocks to progress.

Ancient iron formations - iron and silica-rich chemical sedimentary rocks that formed throughout the Precambrian eons - provide a significant part of the evidence for the modern scientific understanding of palaeoenvironmental conditions in Archaean (4.0-2.5 billion years ago) and Proterozoic (2.5-0.539 billion years ago) times. Despite controversies regarding their formation mechanisms, iron formations are a testament to the influence of the Precambrian biosphere on early ocean chemistry. As many iron formations are pure chemical sediments that reflect the composition of the waters from which they precipitated, they can also serve as nuanced geochemical archives for the study of ancient marine temperatures, redox states, and elemental cycling, if proper care is taken to understand their sedimentological context.

As a consequence of recent increased awareness of the social and political dimensions of climate, many non-specialists discover a need for information about the variety of available climate models. A Climate Modelling Primer, Fourth Edition is designed to explain the basis and mechanisms of all types of current physically-based climate models. A thoroughly revised and updated edition, this book will assist the reader in understanding the complexities and applicabilities of today s wide range of climate models. Topics covered include the latest techniques for modelling the coupled biosphere-ocean-atmosphere system, information on current practical aspects of climate modelling and ways to evaluate and exploit the results, discussion of Earth System Models of Intermediate Complexity (EMICs), and interactive exercises based on Energy Balance Model (EBM) and the Daisyworld model. Source codes and results from a range of model types allows readers to make their own climate simulations and to view the results of the latest high resolution models. Now in full colour throughout and with the addition of cartoons to enhance student understanding the new edition of this successful textbook enables the student to tackle the difficult subject of climate modeling.

The impact of a changing environment on human society and, conversely, the impact of man's activities upon the environment are important and contentious subjects today. Climatic and environmental change have also been credited with bringing about major shifts in human history. One such case is that of the decline of Roman North Africa and its conquest by the Arabs. The evidence for this process is, however, far from clear-cut, and Professor Shaw's concern in these studies is firstly to re-examine what is known, from both archaeological and written sources, and how it has been interpreted, work which has led to some substantial revisions of accepted accounts. In the final three articles he turns to analyse how Roman society functioned on the edge of the desert and, in particular, to investigate the careful exploitation and control of critical water resources.

This book is the first comprehensive introduction to the theory of equatorially-confined waves and currents in the ocean. Among the topics treated are inertial and shear instabilities, wave generation by coastal reflection, semiannual and annual cycles in the tropic sea, transient equatorial waves, vertically-propagating beams, equatorial Ekman layers, the Yoshida jet model, generation of coastal Kelvin waves from equatorial waves by reflection, Rossby solitary waves, and Kelvin frontogenesis. A series of appendices on midlatitude theories for waves, jets and wave reflections add further material to assist the reader in understanding the differences between the same phenomenon in the equatorial zone versus higher latitudes.

The second edition of this book presents an up-to-date account of the transfer of energy, matter, and momentum between the atmosphere and the ocean. The expository style of the book will be welcomed by students and professionals alike, within the fields of meteorology, oceanography, and physics. Topics covered include surface wind waves, the planetary boundary layer, and radiation.

Meteorite tells the fascinating story of the stones from outer space scattered across our planet. From the impact that finished off the dinosaurs to the dagger made of extraterrestrial iron found in Tutankhamun's tomb, this book is packed full of surprising information, unlikely pioneers and eye-opening science. Dr Tim Gregory explains how these rocky fragments offer clues not just to the earliest origins of everything, but also to humanity's survival into the future. 'A passionate communicator, Tim Gregory conjures colourful environments and events far outside the human' NATURE 'Meticulous and eminently readable, served with clarity, erudition and humour' WALL STREET JOURNAL 'Tim Gregory gets it. He has an uncanny ability to swiftly understand, to clearly explain, and to be joyful' CHRIS HADFIELD

Lithium isotopes are a relatively novel tracer of present and past silicate weathering processes. Given that silicate weathering is the primary long-term method by which CO2 is removed from the atmosphere, Li isotope research is going through an exciting phase. We show the weathering processes that fractionate dissolved and sedimentary Li isotope ratios, focusing on weathering intensity and clay formation. We then discuss the carbonate and silicate archive potential of past seawater 7Li. These archives have been used to examine Li isotope changes across both short and long timescales. The former can demonstrate the rates at which the climate is stabilised from perturbations via weathering, a fundamental piece of the puzzle of the long-term carbon cycle.

In the modern marine environment, barium isotope ( 138Ba) variations are primarily driven by barite cycling-barite incorporates 'light' Ba isotopes from solution, rendering the residual Ba reservoir enriched in 'heavy' Ba isotopes by a complementary amount. Since the processes of barite precipitation and dissolution are vertically segregated and spatially heterogeneous, barite cycling drives systematic variations in the barium isotope composition of seawater and sediments. This Element examines these variations; evaluates their global, regional, local, and geological controls; and, explores how 138Ba can be exploited to constrain the origin of enigmatic sedimentary sulfates and to study marine biogeochemistry over Earth's history.

The stresses of the digital world mean that it's now more important than ever to engage with the natural world. And no matter where you are, looking up at the clouds is good for the soul. The sky is the most dramatic and evocative aspect of nature. Ever-changing and ephemeral, clouds reflect the shifting moods of the atmosphere in limitless compositions and combinations.

Gavin Pretor-Pinney started the Cloud Appreciation Society in 2005. Since then, he's been encouraging people to 'look up, marvel at the ephemeral beauty, and always remember to live life with your head in the clouds.' Membership to the Society now includes over 47,000 cloudspotters. Together, they capture and share the most remarkable skies, from sublime thunderstorms and perfect sunsets to hilarious clouds that look like things.

A Cloud A Day is a beautifully illustrated book containing 365 skies selected by the Cloud Appreciation Society. There are photographs by sky enthusiasts around the world, satellite images and photographs of clouds in space, as well as skies depicted by great artists over the centuries. The clouds are accompanied by enlightening explanations, fascinating snippets of cloud science, poetry and uplifting quotations.

The perfect dip-in-and-out book for anyone who wants to de-stress and reconnect with nature, A Cloud A Day will inspire you to open your eyes to the everyday beauty above and to spend a moment each day with your head in the clouds.

In one form or another, iron speciation has had a long history as a paleoredox proxy. The technique has been refined considerably over the years, and the most recent scheme is unique in its potential to distinguish three major oceanic redox states - oxygenated, ferruginous and euxinic. This Element covers the theory behind the proxy, methods involved in applying the technique, and potential complications in interpreting Fe speciation data. A series of case studies are also provided, which highlight how more advanced consideration of the data, often in concert with other techniques, can provide unprecedented insight into the redox state of ancient oceans.