13681 to 13692 of 13980 results
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Read more of: Comment on “Location of the reconnection line for northward interplanetary magnetic field” by K. J. Trattner, S. A. Fuselier, and S. M. Petrinec
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Methane and nitrous oxide in the ice core record
Read more of: Methane and nitrous oxide in the ice core recordPolar ice cores contain, in trapped air bubbles, an archive of the concentrations of stable atmospheric gases. Of the major non-CO2 greenhouse gases, methane is measured quite routinely, while nitrous […]
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Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003
Read more of: Observations of hydroxyl and the sum of peroxy radicals at Summit, Greenland during summer 2003The first measurements of peroxy (HO2+RO2) and hydroxyl (OH) radicals above the arctic snowpack were collected during the summer 2003 campaign at Summit, Greenland. The median measured number densities for […]
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Four climate cycles of recurring deep and surface water destabilizations on the Iberian Margin
Read more of: Four climate cycles of recurring deep and surface water destabilizations on the Iberian MarginCentennial climate variability over the last ice age exhibits clear bipolar behavior. High-resolution analyses of marine sediment cores from the Iberian margin trace a number of associated changes simultaneously. Proxies […]
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Northern Hemisphere forcing of climatic cycles in Antarctica over the past 360,000 years
Read more of: Northern Hemisphere forcing of climatic cycles in Antarctica over the past 360,000 yearsThe Milankovitch theory of climate change proposes that glacial–interglacial cycles are driven by changes in summer insolation at high northern latitudes. The timing of climate change in the Southern Hemisphere […]
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Orbital and millennial Antarctic climate variability over the past 800,000 years
Read more of: Orbital and millennial Antarctic climate variability over the past 800,000 yearsA high-resolution deuterium profile is now available along the entire European Project for Ice Coring in Antarctica Dome C ice core, extending this climate record back to marine isotope stage […]
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A review of surface ozone in the polar regions
Read more of: A review of surface ozone in the polar regionsSurface ozone records from ten polar research stations were investigated for the dependencies of ozone on radiative processes, snow-photochemisty, and synoptic and stratospheric transport. A total of 146 annual data […]
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Photoformation of hydroxyl radical on snow grains at Summit, Greenland
Read more of: Photoformation of hydroxyl radical on snow grains at Summit, GreenlandWe measured the photoformation of hydroxyl radical (OH) on snow grains at Summit, Greenland during the spring and summer. Midday rates of OH formation in the snow phase in the […]
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Modelling Late Oligocene C4 grasses and climate
Read more of: Modelling Late Oligocene C4 grasses and climateEvidence suggests that C4 grasses, adapted to conditions of low CO2, high temperatures, and water-stressed environments, expanded relatively quickly, and in several geographically distinct regions, during the Late Miocene (approximately […]
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The Mediterranean hydrologic budget from a Late Miocene global climate simulation
Read more of: The Mediterranean hydrologic budget from a Late Miocene global climate simulationDuring the Late Miocene the Mediterranean experienced a period of extreme salinity fluctuations known as the Messinian Salinity Crisis (MSC). The causes of these high amplitude changes in salinity are […]
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Model uncertainty in the ecosystem approach to fisheries
Read more of: Model uncertainty in the ecosystem approach to fisheriesFisheries scientists habitually consider uncertainty in parameter values, but often neglect uncertainty about model structure. The importance of this latter source of uncertainty is likely to increase with the greater […]
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A compilation of parameters for ecosystem dynamics models of the Scotia Sea-Antarctic Peninsula region
Read more of: A compilation of parameters for ecosystem dynamics models of the Scotia Sea-Antarctic Peninsula regionExpansion of the krill fishery in the Scotia Sea – Antarctic Peninsula region beyond the current precautionary catch limit requires the development and assessment of methods for subdividing the regional […]