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Antarctic krill (Euphausia superba Dana) is a key species of the Southern Ocean ecosystem, immensely abundant and targeted by the krill fishery. For their sustainable management, krill distribution and biomass estimates are required, typically achieved through acoustic-trawl surveys.
During the summer of 2021, we conducted a comprehensive study on zooplankton communities along East Antarctica (55°E to 80°E) as part of the Trends in Euphausiids off Mawson, Predators, and Oceanography (TEMPO) survey program.
Atmospheric electric field … measurements from the Concordia station on the Antarctic Plateau are … compared with those from Vostok (560 km away) for the period of overlap … (2009–11) and to Carnegie (1915–29) and extended Vostok (2006–11) measurements.
Reference IUGG-2058, Symposium M03 Weather and the Global Atmospheric Electric Circuit. Atmospheric electric field measurements from Concordia station on the Antarctic Plateau are compared with those from Vostok (560 km away) for the period of overlap (2009-2011) and to earlier Vostok (2006-2009)…
Measuring the parameters of the atmospheric circuit with hourly and daily time resolution … is difficult to achieve and demonstrate. However, a relationship between Vi, the ionosphere- … to-ground potential difference, and Ez, the near-ground-level vertical electric field…
The long-standing mainstay of support for C. T. R. Wilson’s global circuit hypothesis is the similarity … between the diurnal variation of thunderstorm days in universal time and the Carnegie curve of electrical … potential gradient.
Regular measurements of the atmospheric electric field made at Vostok Station (φ=78.451S; … ë=106.871E, elevation 3500 m) in Antarctica demonstrate that extremely intense electric fields … (1000–5000 V/m) can be observed during snow storms.
Superposed epoch analysis (SEA) was used to examine ionospheric drift velocities measured by a digital … ionosonde located at the mid-latitude station Bundoora (145.11E, 37.71S geographic), near Melbourne. The control times for the SEA were the times of cloud-to-ground (CG)…
Mid-latitude Digisonde Doppler velocities, auroral electrojet (AE) indices and cloud-to-ground (CG) lightning strokes during August 2003–2004 were used to study the perturbations in the F-region … vertical drift associated with terrestrial thunderstorms. A superposed epoch analysis (SEA)…
Serum 25(OH)D levels decline without sunlight … exposure. We studied 120 expeditioners to Antarctica to … determine the skeletal and hormonal responses to sunlight … deprivation. With emerging vitamin D insufficiency, serum … calcium decreased, PTH increased…
Statistically significant (at the 95% significance level) changes in daily cloud cover are … found to occur globally over land coincident with extreme increases in ‘fair-weather’ … measurements of vertical electric field (Ez) measured at Vostok, Antarctica.
Pressure variations at 11 Antarctic and 7 Arctic sites show significant day-to-day correlations with a proxy for the … meteorological generators (thunderstorms and strongly electrified clouds) of the atmospheric circuit. The proxy is … derived from electric field measurements at Vostok (78.5ºS…
The atmospheric electric field Ez measured at the Antarctic Plateau station of Vostok made it possible to estimate … the role of the main generators in formation the global electric circuit. In the polar region during the periods with good … weather conditions the classical diurnal curve…