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River Buries Permafrost Carbon at Sea

By Guest PostOctober 8, 2015Environmentaltai territory, arctic landscape, arctic permafrost, carbon dioxide, CO2 emissions, frozen ground, mackenzie river, mendeleyev oil refinery, organic carbon, river, samples, sea, solo space flight, valier galy

New study traces the fate of carbon stored in thawing Arctic soils

As temperatures rise, some of the organic carbon stored in Arctic permafrost meets an unexpected fate—burial at sea. As many as 2.2 million metric tons of organic carbon per year are swept along by a single river system into Arctic Ocean sediment, according to a new study an international team of researchers published in Nature. This process locks away carbon dioxide (CO₂) – a greenhouse gas – and helps stabilize the earth’s CO₂ levels over time, and it may help scientists better predict how the natural carbon cycle will interplay with the surge of CO₂emissions due to human activities. (more…)

How Mars’ atmosphere got so thin: New insights from Curiosity

By Guest PostJuly 29, 2013Scienceadditional neutron, carbon 12, carbon 13, carbon isotope, curiosity rover, heavier stable isotope, insights from curiosity, isotopes, lighter isotopes, mahli, mars atmosphere, martian air, NASA, sam, samples, solar system, sushil atreya, thin, university of michigan

ANN ARBOR — New findings from NASA’s Curiosity rover provide clues to how Mars lost its original atmosphere, which scientists believe was much thicker than the one left today.

“The beauty of these measurements lies in the fact that these are the first really high-precision measurements of the composition of Mars’ atmosphere,” said Sushil Atreya, professor of atmospheric, oceanic and space sciences at the University of Michigan. (more…)

Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions

By Guest PostJune 24, 2013Scienceals, ancient seawater concrete, berkeley lab, bessy synchrotron, chemical attack, cutting carbon emissions, drill core, emperor augustus, environmentally damaging, Germany, greenhouse gas emissions, gulf of naples, king abdullah university, library foundation, limestone, loeb classical, marie jackson, mediterranean sea, modern world, paulo monteiro, pliny the elder, pompeii, portland cement, pozzolan, pozzuoli bay, roman concrete, roman harbor, roman seawater concrete, samples, saudi arabia, secret, vitruvius, volcanic ash

Berkeley Lab scientists and their colleagues have discovered the properties that made ancient Roman concrete sustainable and durable

The chemical secrets of a concrete Roman breakwater that has spent the last 2,000 years submerged in the Mediterranean Sea have been uncovered by an international team of researchers led by Paulo Monteiro of the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab), a professor of civil and environmental engineering at the University of California, Berkeley.

Analysis of samples provided by team member Marie Jackson pinpointed why the best Roman concrete was superior to most modern concrete in durability, why its manufacture was less environmentally damaging – and how these improvements could be adopted in the modern world. (more…)

NASA Mars Rover Preparing to Drill into First Martian Rock

By Guest PostJanuary 16, 2013Scienceaileen yingst, bassinite, bradbury landing, calcium, california institute, camera, chemcam, chemical composition, concretions, curiosity, drill hardware, drilling, drilling target, drt, dust removal tool, Environment, evidence, flat rock, fractures, france, gale crater, gillespie lake rock, gypsum, hydrated calcium sulfate, hydrogen, imager, internet buzz, jet propulsion laboratory, john grotzinger, john klein, laser pulsing chemistry, level, mahli, mars, mars hand lens, mars rover curiosity, mars science laboratory, martian flower, martian material, mast camera, mastcam, microbial life, mineral, mission, nantes, NASA, nicolas mangold, pale veins, pasadena, red planet, richard cook, rock, samples, sedimentary rocks, shaler unit, shallow depression, sheepbed outcrop, stream flow, sulfur, Technology, terrain, tucson, veins, wet environment, wet history, yellowknife bay

PASADENA, Calif. — NASA’s Mars rover Curiosity is driving toward a flat rock with pale veins that may hold clues to a wet history on the Red Planet. If the rock meets rover engineers’ approval when Curiosity rolls up to it in coming days, it will become the first to be drilled for a sample during the Mars Science Laboratory mission.

The size of a car, Curiosity is inside Mars’ Gale Crater investigating whether the planet ever offered an environment favorable for microbial life. Curiosity landed in the crater five months ago to begin its two-year prime mission. (more…)

Tag Archives: samples

River Buries Permafrost Carbon at Sea

How Mars’ atmosphere got so thin: New insights from Curiosity

Roman Seawater Concrete Holds the Secret to Cutting Carbon Emissions

NASA Mars Rover Preparing to Drill into First Martian Rock