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Results 2926 to 2950 of 8726
Many contaminated cold region soils are deficient in nitrogen, and addition of the proper amount of this nutrient can increase the biodegradation rate. However…
Semi-diurnal oscillations are a ubiquitous feature of polar sea-ice motion. Over much of the … Arctic basin, inertial and semi-diurnal tidal variability have similar frequencies so that periodicity alone … is inadequate to determine the source of oscillations.
Sea-ice velocities derived from remotely sensed microwave imagery of the Special Sensor … Microwave/Imager (SSM/I) have been analyzed for changes over time in Antarctic sea-ice velocity, for … the period 1988–2004.
The new features of total ozone quasi-stationary asymmetry over Antarctic region … during Austral spring are presented.
This paper presents the meteor temperatures estimated using two radars installed … in Davis (69 deg S, 78 deg E), Antarctica. The Davis MST radar was installed in … February 2003, primarily for observation of polar mesosphere summer echoes…
This paper presents the meteor observations using two radars installed in Davis (69 … deg S, 78 deg E), Antarctica. The Davis MST radar was installed in February 2003, primarily for observation of polar mesosphere summer echoes…
The Australian Climate Ocean Model (AusCOM) is an initiative by the Australian … climate sciences community (including government and academic research … laboratories) towards a unified coupled ocean-ice model for climate … applications.
We present sea surface temperature (SST) records with centennial-scale resolution from the Bay of Plenty, north of New Zealand. Foraminiferal assemblage-based paleo-SST estimates provide a deglacial record of SST … since 16.5 14C ka. Average Holocene SSTs are 15.6C for winter and 20.3C for summer…
We report nitrate (NO3) nitrogen isotope ratios for seawater samples collected in the … Subantarctic Zone of the Southern Ocean during both winter and summer as part of the … Australian Antarctic CRC Subantarctic Zone (SAZ) Project.
Based to a large degree on the precedent set by CCAMLR in 1991, the streamer line has … become the primary, and most commonly prescribed, seabird mitigation device in world … longline fi sheries. This paper reviews CCAMLR streamer line requirements (Conservation … Measure 25-02 (2002)…
Antarctic ecosystems represent one extreme of the continuum of environmental … conditions across the planet. To our eyes, the environment appears harsh but, even … though terrestrial biological diversity is restricted, a wide range of life is present … and, locally, thrives. In the Antarctic…
Concentrations of UV-B absorbing pigments and anthocyanins were measured in three moss species, over a summer growing season in Antarctica. Significant seasonal differences were found in the potential UV-B screening pigments. The most exposed species, Ceratodon purpureus…
Antarctica is both the coldest and most arid continent on Earth, and experiences continuous … light in midsummer and continuous darkness in midwinter. These factors reduce the growth … rate of the continental Antarctic flora (mosses, lichens and algae) to a minimum.
Antarctica has been exposed to increases in ultraviolet-B (UV-B) radiation as a result of … ozone depletion for several decades. In addition, climate change will alter temperature and … water availability to plant communities over the next century. Recent studies…
The impact of ambient ultraviolet (UV)-B radiation on the endemic bryophyte, Grimmia … antarctici, was studied over 14 months in East Antarctica. Over recent decades, Antarctic … plants have been exposed to the largest relative increase in UV-B exposure as a result of … ozone depletion.
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events.
Climate change is expected to affect the high latitudes first and most severely, rendering … Antarctica one of the most significant baseline environments for the study of global … climate change. The indirect effects of climate warming…
Invasive species are a serious threat to biodiversity … worldwide. The relatively simple ecological … systems of the subantarctic have the potential to be signiWcantly … damaged by predatory species that invade. Two species of exotic, predatory…