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Antarctic ice shelves typically comprise continental meteoric ice, in situ-accumulated meteoric ice, and marine ice accumulated at the shelf base. Using borehole optical televiewer logs from across Larsen C Ice Shelf, Antarctic Peninsula, we identify and report an intermediate ice unit…
The presence and nature of marine ice in ice shelves is important, yet difficult to determine. We present transient electromagnetic results spanning 10 km across a suture zone of Larsen C Ice Shelf (LCIS), Antarctica, supported by central borehole measurements.
The presence and nature of marine ice in ice shelves is important, yet difficult to determine. We present transient electromagnetic results spanning 10 km across a suture zone of Larsen C Ice Shelf (LCIS), Antarctica, supported by central borehole measurements.
Antarctic ice shelves typically comprise continental meteoric ice, in situ-accumulated meteoric ice, and marine ice accumulated at the shelf base. Using borehole optical televiewer logs from across Larsen C Ice Shelf, Antarctic Peninsula, we identify and report an intermediate ice unit…
Southern Hemisphere climate reconstructions are limited by quantity and spatial coverage of well resolved paleoclimaterecords from the last 2000 years. This was the motivation to drill an ice core at a new site in East Antarctica…
We report the first observations of simultaneous high?]latitude interhemispheric F region … neutral wind fields by combining the 630 nm optical measurements from two scanning … Doppler imagers (SDIs) and three Fabry?]Perot interferometers (FPIs) for a period … exceeding 5 h.
Polar Stratospheric Cloud (PSC) composition class information is extracted from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) curtains for four Antarctic PSC seasons (2007 - 2010) and four Arctic PSC seasons (2006/07 - 2009/10). Orographic gravity wave (OGW)…
We report the first observations of simultaneous high-latitude inter-hemispheric F-region neutral wind fields by combining the 630 nm optical measurements from two scanning Doppler imagers and three Fabry-Perot interferometers for a period exceeding 5 hours on 3 October 2008.
We evaluate atmospheric ionization during the Ground Level Enhancement (GLE) of 2005 Jan 20 using the continuous slowing down (CSD) energy loss approximation [1,2]. The top-of-atmosphere particle flux is derived using satellite measurements (for particle energies below 500MeV)…
We report the first observations of simultaneous high-latitude interhemispheric … F-region neutral wind fields by combining the 630 nm optical … measurements from two scanning Doppler imagers (SDI) and three … Fabry-Perot interferometers (FPI) for a period exceeding 5 hours.
We evaluate atmospheric ionization during the Ground Level Enhancement (GLE) of 2005 Jan 20 using two methods: a Monte-Carlo (MC) air-shower simulation [1] and a continuous slowing down (CSD) energy loss approximation [2,3]. For both methods…
The THz spectral region includes a number of important … transitions which allow us to trace the evolution of the interstellar … medium. Because of the opacity of the atmosphere in this spectral … range, the best sites for ground-based THz observations are on the … Antarctic Plateau; of these sites…
Atmospheric ionization during Solar Proton Events (SPE) has traditionally … been modeled using top-of-atmosphere (TOA) particle fluxes measured by near- … Earth spacecraft, and as a consequence the modeling has been restricted to … particle energies below ¡ 500 MeV. However…
Pre-HEAT is a 20 cm aperture submillimeter-wave telescope with a 660 GHz (450 micron) Schottky diode heterodyne … receiver and digital FFT spectrometer for the Plateau Observatory (PLATO) developed by the University of New South … Wales. In January 2008 it was deployed to Dome A…
This paper presents results on modeling the ground-level response of the higher energy protons for the 2005 … January 20 ground-level enhancement (GLE). This event, known as GLE 69, produced the highest intensity of relativistic … solar particles since the famous event on 1956 February 23.
Atmospheric ionization by solar protons has traditionally been … modeled using top-of-atmosphere (TOA) particle fluxes measured … by near-Earth spacecraft, and as a consequence have been … restricted to particle energies below ~500 MeV. However…
Extreme solar processes at the Sun on 2001April 15 accelerated protons to relativistic energies, resulting in a groundlevel … enhancement in cosmic rays observed at Earth. The GOES 10 spacecraft measured the proton flux directly…
On 20 January 2005 the sun produced the highest intensity of relativistic … solar particles observed at Earth in 50 years. The sea-level increase at Terre Adelie … (~46 X in 1 minute data) was slightly less than in 1956 (Leeds ~47 X in 15 minute … data).