Real-time imaging of density ducts between the plasmasphere and ionosphere
MetadataShow full item record
Ionization of the Earth's atmosphere by sunlight forms a complex, multilayered plasma environment within the Earth's magnetosphere, the innermost layers being the ionosphere and plasmasphere. The plasmasphere is believed to be embedded with cylindrical density structures (ducts) aligned along the Earth's magnetic field, but direct evidence for these remains scarce. Here we report the first direct wide-angle observation of an extensive array of field-aligned ducts bridging the upper ionosphere and inner plasmasphere, using a novel ground-based imaging technique. We establish their heights and motions by feature tracking and parallax analysis. The structures are strikingly organized, appearing as regularly spaced, alternating tubes of overdensities and underdensities strongly aligned with the Earth's magnetic field. These findings represent the first direct visual evidence for the existence of such structures.
Showing items related by title, author, creator and subject.
Quantification of an Archaean to Recent Earth Expansion Process Using Global Geological and Geophysical Data SetsMaxlow, James (2001)Global geological and geophysical data, while routinely used in conventional plate tectonic studies, has not been applied to models of an expanding Earth. Crustal reconstructions on Archaean to Recent models of an expanding ...
Earth2014: 1 arc-min shape, topography, bedrock and ice-sheetmodels – Available as gridded data and degree-10,800 sphericalharmonicsHirt, Christian; Rexer, Moritz (2015)Since the release of the ETOPO1 global Earth topography model through the US NOAA in 2009, new or significantly improved topographic data sets have become available over Antarctica, Greenland and parts of the oceans. Here, ...
Hirt, Christian; Kuhn, Michael (2012)Mass associated with surface topography makes a significant contribution to the Earth’s gravitational potential at all spectral scales. Accurate computation in spherical harmonics to high degree requires calculations of ...