11401 to 11412 of 14119 results
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Changes in reactive stratospheric gases due to a change in Brewer-Dobson circulation: results from a simple model
Read more of: Changes in reactive stratospheric gases due to a change in Brewer-Dobson circulation: results from a simple modelAmounts of source gases with stratospheric sinks (CFCs, N2O, CH4) are affected by changes in BrewerDobson circulation. Source gases and their degradation products are important for atmospheric chemistry and climate. […]
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Cross-hemisphere migration of a 25 g songbird
Read more of: Cross-hemisphere migration of a 25 g songbirdThe northern wheatear (Oenanthe oenanthe) is a small (approx. 25 g), insectivorous migrant with one of the largest ranges of any songbird in the world, breeding from the eastern Canadian […]
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The existence of the edge region of the Antarctic stratospheric vortex
Read more of: The existence of the edge region of the Antarctic stratospheric vortexNew evidence from models, ozone measurements and balloon trajectories is presented that confirms the existence of a broad cohesive region of air at the edge of the Antarctic stratospheric vortex […]
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Chemical limnology in coastal East Antarctic lakes: monitoring future climate change in centres of endemism and biodiversity
Read more of: Chemical limnology in coastal East Antarctic lakes: monitoring future climate change in centres of endemism and biodiversityPolar lakes respond quickly to climate-induced environmental changes. We studied the chemical limnological variability in 127 lakes and ponds from eight ice-free regions along the East Antarctic coastline, and compared […]
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Food web structure and bioregions in the Scotia Sea: A seasonal synthesis
Read more of: Food web structure and bioregions in the Scotia Sea: A seasonal synthesisBioregionalisation, the partitioning of large ecosystems into functionally distinct sub-units, facilitates ecosystem modelling, management and conservation. A variety of schemes have been used to partition the Southern Ocean, based variously […]
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A foodweb model to explore uncertainties in the South Georgia shelf pelagic ecosystem
Read more of: A foodweb model to explore uncertainties in the South Georgia shelf pelagic ecosystemFoodweb models provide a useful framework for compiling data on biomass, production, consumption and feeding relationships. They are particularly useful for identifying gaps and inconsistencies in the data, and for […]
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Seasonal trophic structure of the Scotia Sea pelagic ecosystem considered through biomass spectra and stable isotope analysis
Read more of: Seasonal trophic structure of the Scotia Sea pelagic ecosystem considered through biomass spectra and stable isotope analysisThe biomass size structure of pelagic communities provides a system level perspective that can be instructive when considering trophic interactions. Such perspectives can become even more powerful when combined with […]
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Re-evaluation of historical rockhopper penguin population data in the Falkland Islands
Read more of: Re-evaluation of historical rockhopper penguin population data in the Falkland IslandsOver the past 70 years, three counts have been conducted on the Rockhopper Penguin (Eudyptes chrysocome) population on the Falkland Islands during the 1932/33, 1995/96 and 2000/01 breeding seasons. The […]
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Valdivian ecosystems in the Late Cretaceous and Early Tertiary of Antarctica: further evidence from myrtaceous and eucryphiaceous fossil wood
Read more of: Valdivian ecosystems in the Late Cretaceous and Early Tertiary of Antarctica: further evidence from myrtaceous and eucryphiaceous fossil woodCool temperate rainforests growing on the flanks of the Andes and along the Coastal Range in Valdivia (Chile) today provide the closest analogue for the fossil floras of Antarctica during […]
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Phytoplankton biomass and residual nitrate in the pelagic ecosystem
Read more of: Phytoplankton biomass and residual nitrate in the pelagic ecosystemWe develop and analyse a simple, two-compartment (chlorophyll and nitrate) model of the surface mixed layer of the ocean. The mixed-layer depth is modulated intermittently to simulate the effects of […]