Publications matching your search query
Results 26 to 50 of 99
The correct identification of ionospheric echoes and 'ground' or 'sea' echoes is important to a … wide variety of studies using SuperDARN radar data. FITACF correctly distinguishes the … majority of ionospheric and ground echoes…
Line-transect distance sampling is a widely used method for estimating animal density from aerial surveys. Analysis of line-transect distance data usually relies on a requirement that the statistical distribution of distances of animal … groups from the transect line is uniform.
CCAMLR Conservation Measure 25-02 requires Spanish-system longline vessels to attach 8.5 kg weights at 40 m intervals on longlines to minimise interactions with seabirds. The weights typically used are collections of rocks enclosed in netting bags.
We compiled and reviewed 248 cases of reported vessel collisions with small cetaceans worldwide and with large … cetaceans in the Southern Hemisphere. Difficulties were encountered with the comparison of highly variable data in … terms of quality (evidence), sources…
Tide gauges remain the fundamental instrument used to measure water level in the coastal environment. Issues … surrounding the calibration and vertical datum control of tide gauges are therefore fundamental in studies involving … the determination of absolute sea level and its variation over time.
Neutron monitors are integral detectors of secondary cosmic rays. Since each of them … has its own detection efficiency, energy spectra cannot readily be derived from their … observations. To circumvent this problem…
Identification of DNA sequence diversity is a powerful means for assessing the … species present in environmental samples.
ABSTRACT: Collisions with vessels are a well-documented conservation problem for some populations of large whales (LW) in the Northern Hemisphere. Less attention has been given to incidents in the Southern Hemisphere or to small cetaceans … (SC) worldwide…
The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) is bound by … its Article II, 3 to follow an ecosystem approach to management. This approach has been extended to … the application of a precautionary approach in the late 1980s. In our review…
Subantarctic tall tussock grassland and megaherb … vegetation has been massively aVected by feral herbivores … on islands where both occur.
The Super Dual Auroral Radar Network (SuperDARN) is an international network of oblique HF over-the-horizon … radars dedicated to the study of high latitude magnetosphere-ionosphere convection. In scientific terms, they have been … an outstanding success…
There are a range of chemical contaminants of concern in Antarctic marine environments as a … result of the activities of humans, including past waste disposal practices and accidental fuel … spills. Environmental guidelines for contaminants, including targets for contaminated site … remediation…
Super Dual Auroral Radar Network (SuperDARN) HF backscatter radaras scan 16 beam directions over a field of view of ~52°. In the common mode of operation, data is collected using 45-km range gates and 7-s integrations on each beam.
In autumn 2005, the GCOS Working Group on SST and Sea Ice (GCOS SST&SI WG) was redefined. The working group had been in existence, but inactive, for some 5 years, however it was concluded that there is a need for its activities. In short…
A new method for estimating illegal fi shing effort is put forward. The results from this … new method are similar to those of the Agnew and Kirkwood (2005) method…
The process of marking otherwise indistinguishable animals … as individuals (and following them through subsequent … phases of their lives) has been central to numerous advances … in animal ecology, management, and conservation (Caughley … and Gunn 1996). Indeed…
A function that approximates atmospheric tidal behavior in the polar regions is … described.
The degree to which Southern Hemisphere climatic changes during the end of the last … glacial period and early Holocene (30-8 ka) were influenced or initiated by events occurring in the high … latitudes of the Northern Hemisphere is a complex issue.
Methanesulphonic acid (MSA) measured along ice cores was largely used as a marker of … past marine biogenic activity because of it is formed by atmospheric oxidation of … dimethylsulphyde (DMS), emitted by metabolic processes of marine biota.