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The Many Lives of Carbon
In its pure form, carbon appears as the soft graphite of a pencil or as the sparkling diamond in a woman’s engagement ring. Underneath the surface, carbon is also the basic building block of the cells in our bodies and of all known life on earth. And at a molecular level, carbon bonds with oxygen to create carbon dioxide—a gas as vital to our life on this planet as it is detrimental at high levels in our atmosphere. As we face the climate change crisis, it’s now more important than ever to understand carbon and its life cycle. The Many Lives of Carbon is the story of this all-important chemical element, labeled C on our periodic tables. It’s the story of balance—between photosynthe...
Die Welt auf der Kippe
Vor 70.000 Jahren gab es eine Art, die aus verstreuten Populationen von einigen Hundert Individuen bestand und weitgehend friedlich in einer Ecke Afrikas lebte. Heute zählt die Art 8 Milliarden und ist dabei, den Planeten grundlegend zu verändern. Die fragliche Spezies sind wir. Was wir der Erde antun, wird auf einer geologischen Zeitskala über hunderttausende von Jahren aufgezeichnet. So umfangreich sind die Emissionen von Treibhausgasen und die Verringerung der natürlichen Vielfalt, für die wir in einem winzigen Moment in der langen Geschichte des Planeten verantwortlich sind. Dag O. Hessen nimmt deshalb kein Blatt vor den Mund. Basierend auf Recherchen, nicht auf Panikmache, zeigt er...
Verden på vippepunktet
For 70 000 år siden fantes det en art, bestående av spredte bestander på noen hundre individer, som stort sett levde fredelig i et hjørne av Afrika. I dag teller arten 9 milliarder, og er i ferd med å forandre planeten fundamentalt. Arten det er snakk om er oss. Det vi gjør mot jorda registreres på en geologisk tidsskala, over hundretusenvis av år. Så omfattende er utslippene av klimagasser og reduksjonen av naturmangfoldet vi har stått for i løpet av et ørlite øyeblikk i klodens lange historie. Dag O. Hessen tar derfor bladet fra munnen. Med utgangspunkt i forskning, ikke skremselspropaganda, viser han hvordan det står til med natur og klima – og hvor ille det kan gå. Det s...
C -Die vielen Leben des Kohlenstoffs
"C - Die vielen Leben des Kohlenstoffs" erzählt die Geschichte des fragilen Gleichgewichts - zwischen Photosynthese und Zellatmung, zwischen Aufbau und Verbrennung, zwischen Leben und Tod - und davon wie dieses durch das Einwirken des Menschen unwiderruflich gestört wurde. Kohlenstoff ist das Schlüsselelement des Lebens, der Grundbaustein der Zellen in unserem Körper und in allem bekannten Leben auf der Erde. Angesichts der Krise des Klimawandels ist es jetzt wichtiger als je zuvor, dieses wichtige chemische Element und seinen Lebenszyklus zu verstehen. Dag Olav Hessen nimmt den Leser in fesselnder Prosa mit auf eine Reise von Atom zu Planet.
Science, Geopolitics and Culture in the Polar Region
Throughout the twentieth century, glaciologists and geophysicists from Denmark, Norway and Sweden made important scientific contributions across the Arctic and Antarctic. This research was of acute security and policy interest during the Cold War, as knowledge of the polar regions assumed military importance. But scientists also helped make the polar regions Nordic spaces in a cultural and political sense, with scientists from Norden punching far above their weight in terms of population, geographical size or economic activity. This volume presents an image of Norden that stretches far beyond its conventional limits, covering a vast area in the North Atlantic and the Arctic Sea, as well as p...
Aquatic Humic Substances
Humic substances occur in all kinds of aquatic systems, but are particularly important in northern, coniferous areas. They strongly modify the aquatic ecosystems and also constitute a major problem in the drinking water supply. This volume covers all aspects of aquatic humic substances, from their origin and chemical properties, their effects on light and nutrient regimes and biogeochemical cycling, to their role regarding organisms, productivity and food web organization from bacteria to fish. Special emphasis is paid to carbon cycling and food web organization in humic lakes, but aspects of marine carbon cycling related to humus are treated as well.
UV Radiation and Arctic Ecosystems
Although there are some biological processes that are supported by UV radiation, most organisms are stressed by it in various ways, e.g. through DNA damage. Top international experts present an integrated overview of UV radiation and its effects on terrestrial, freshwater and marine Arctic biota. Increased stratospheric ozone depletion and the corresponding increase in ground levels of UV radiation as well as ambient, "natural" UV radiation as a key ecological factor in the Arctic spring and summer are discussed in detail. Additionally, basic information on Arctic ecosystems is given. The volume provides not only an excellent account of present-day knowledge of the subject, but also describes the state of the art on which future research can be built.
Science, Geopolitics and Culture in the Polar Region
Throughout the twentieth century, glaciologists and geophysicists from Denmark, Norway and Sweden made important scientific contributions across the Arctic and Antarctic. This research was of acute security and policy interest during the Cold War, as knowledge of the polar regions assumed military importance. But scientists also helped make the polar regions Nordic spaces in a cultural and political sense, with scientists from Norden punching far above their weight in terms of population, geographical size or economic activity. This volume presents an image of Norden that stretches far beyond its conventional limits, covering a vast area in the North Atlantic and the Arctic Sea, as well as p...
