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Use of Proxies in Paleoceanography
Paleoceanographic proxies provide infonnation for reconstructions of the past, including climate changes, global and regional oceanography, and the cycles of biochemical components in the ocean. These prox ies are measurable descriptors for desired but unobservable environmental variables such as tempera ture, salinity, primary productivity, nutrient content, or surface-water carbon dioxide concentrations. The proxies are employed in a manner analogous to oceanographic methods. The water masses are first characterized according to their specific physical and chemical properties, and then related to particular assemblages of certain organisms or to particular element or isotope distributions....
Alien Ocean
Alien Ocean immerses readers in worlds being newly explored by marine biologists, worlds usually out of sight and reach: the deep sea, the microscopic realm, and oceans beyond national boundaries. Working alongside scientists at sea and in labs in Monterey Bay, Hawai'i, the Woods Hole Oceanographic Institution, and the Sargasso Sea and at undersea volcanoes in the eastern Pacific, Stefan Helmreich charts how revolutions in genomics, bioinformatics, and remote sensing have pressed marine biologists to see the sea as animated by its smallest inhabitants: marine microbes. Thriving in astonishingly extreme conditions, such microbes have become key figures in scientific and public debates about the origin of life, climate change, biotechnology, and even the possibility of life on other worlds. Alien Ocean immerses readers in worlds being newly explored by marine biologists, worlds usually out of sight and reach: the deep sea, the microscopic realm, and oceans beyond national boundaries. Working alongside scientists at sea and in labs in
Chemical Reference Materials
The accuracy of chemical oceanographic measurements depends on calibration against reference materials to ensure comparability over time and among laboratories. Several key parameters lack reference materials for measurements in seawater, particles in the water column, and sediments. Without reference materials it is difficult to produce the reliable data sets or long-term baseline studies that are essential to verify global change and oceanic stability. Chemical Reference Materials : Setting the Standards for Ocean Science identifies the most urgently required chemical reference materials based on key themes for oceanographic research and provides suggestions as to how they can be developed...
Marine Hydrocarbon Seeps
This book provides an up-to-date overview of the microbiology, biogeochemistry, and ecology of marine hydrocarbon seeps, a globally occurring habitat for specialized microorganisms and invertebrates that depend on natural hydrocarbon seepage as a food and energy source. Prominent examples include the briny hydrocarbon seeps and mud volcanoes on the continental slope of the Gulf of Mexico and in the Mediterranean, the hydrothermally heated hydrocarbon seeps at Guaymas Basin (Mexico), and the oil and gas seeps off the coast of California and in the Gulf of Mexico. Featuring topical chapters by leading researchers in the area, the book describes geological settings, chemical characteristics of hydrocarbon seepage, hydrocarbon-dependent microbial populations, and ecosystem structure and trophic networks at hydrocarbon seeps. Further, it also discusses applied aspects such as bioremediation potential (oil-degrading microorganisms).
