Results 31 to 40 of about 1,640 (148)

Modulation of nightside polar patches by substorm activity [PDF]

, 2009
Results are presented from a multi-instrument study showing the influence of geomagnetic substorm activity on the spatial distribution of the high-latitude ionospheric plasma. Incoherent scatter radar and radio tomography measurements on 12 December 2001
Moen, J, Wood, Alan, Pryse, SE, J. Moen, S. E. Pryse, Moen, Joran, Wood, AG, A. G. Wood   +7 more
core   +1 more source

Supercorotating return flow from reconnection in Saturn's magnetotail [PDF]

, 2011
Detecting plasma dynamics in Saturn's magnetosphere is essential for understanding energy flow through the system. It has been proposed that both the Dungey and Vasyliunas cycles operate at Saturn, and the competition between these cycles has been ...
Badman, S. V., Coates, AJ, S. V. Badman, C. S. Arridge, Young, D.T., Dougherty, MK, Thomsen, M.F., A. J. Coates, Arridge, C. S., Masters, A., Badman, S.V., Young, D. T., D. T. Young, M. K. Dougherty, Thomsen, MF, Coates, Andrew J., Young, DT, Coates, A. J., Badman, SV, Arridge, CS, Masters, A, Thomsen, M. F., Dougherty, M. K., Masters, Adam, Dougherty, M.K., M. F. Thomsen, A. Masters, Arridge, Chris S.   +27 more
core   +1 more source

Comparison between SuperDARN flow vectors and equivalent ionospheric currents from ground magnetometer arrays [PDF]

, 2012
Equivalent ionospheric currents obtained with the spherical elementary current systems (SECS) method and derived from nearly 100 ground magnetometers spread over North America and Greenland are compared with ionospheric flow vectors measured by the ...
Milan, S. E., Stolle, Claudia, H. Gleisner (7605608), V. Angelopoulos (7161083), Grocott, A., A. Grocott (7601519), C. Stolle (7605611), Angelopoulos, V., Stolle, C., O. Amm (7591346), J. M. Weygand (7605605), Weygand, J. M., Amm, O., S. E. Milan (7594526), Gleisner, H.   +14 more
core   +1 more source

A New GRIME2: Using an Octagon Calibration Target and Trail Camera to Measure Stream Water Level Over a 2‐Year Period

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract GaugeCam Remote Image Manager Educational 2 (GRIME2) is a free, open‐source Windows application for water level measurement in surface water bodies using ground‐based time‐lapse imagery. We evaluated a new “stop sign” (i.e., octagon shape) calibration target and GRIME2 algorithms by comparing results to other measurement methods over a 26 ...
Troy E. Gilmore, Kenneth W. Chapman, Mary J. Harner, Jamila Bajelan, Chris Terry, John E. Stranzl Jr., Aaron R. Mittelstet, Christian D. Chapman, Mehrube Mehrubeoglu   +8 more
wiley   +1 more source

Reconfiguration of polar-cap plasma in the magnetic midnight sector

, 2006
Radio tomography and the EISCAT and Super-DARN radars have been used to identify long-lived, high-altitude, cold plasma in the antisunward convective flow across the polar cap.
McCrea, IW, Mccrea, I. W., Lester, M., I. W. McCrea, Middleton, Helen Rose, Pryse, S. E., Middleton, H. R., M. Lester, A. G. Wood, Wood, A. G., H. R. Middleton, Wood, Alan, Pryse, SE, McCrea, Ian, Lester, M, S. E. Pryse, Middleton, HR, Wood, AG   +17 more
core   +1 more source

Meteorological Tsunamis: From Local Hazard to Global Relevance

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract Research on meteorological tsunamis or meteotsunamis—long ocean waves in the tsunami frequency band generated by propagating atmospheric disturbances which resonantly enhance ocean waves—has grown significantly in recent decades. This expansion is due to progress in (a) ocean and atmospheric measurements, including advanced instrumentation ...
Ivica Vilibić, Petra Zemunik Selak, Jadranka Šepić   +2 more
wiley   +1 more source

Midnight sector observations of auroral omega bands [PDF]

, 2011
We present observations of auroral omega bands on 28 September 2009. Although generally associated with the substorm recovery phase and typically observed in the morning sector, the features presented here occurred just after expansion phase onset and ...
Fear, R.C., Kadokura, A., Glassmeier, K.H., G. Björnsson, Woodfield, E.E., J. P. McFadden, V. Angelopoulos, Björnsson, G., K. Hosokawa, Fazakerley, A. N., Khotyaintsev, Y., A. Grocott, K. H. Glassmeier, E. E. Woodfield, Donovan, E., R. C. Fear, Woodfield, E. E., Wild, J.A., Glassmeier, K. H., Fazakerley, A.N., Andre, M., André, Mats,, Lester, M., Y. Khotyaintsev, Lucek, E., Wild, J. A., J. A. Wild, Grocott, A., M. Lester, C. Carlson, McFadden, J. P., A. N. Fazakerley, M. Andre, Angelopoulos, V., E. Donovan, A. Kadokura, Khotyaintsev, Yuri,, McFadden, J.P., Fear, R. C., Carlson, C., E. Lucek, Hosokawa, K.   +41 more
core   +1 more source

Are Cusp‐Aligned Arcs the Equivalent of Auroral Streamers in a Closed Magnetosphere?

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract We present the first observations of a 3‐hour quasi‐periodic intensification of the polar auroras during a prolonged interval of strongly‐northward interplanetary magnetic field (IMF). This takes the form of a localized spot of auroral emission that appears near the pole which subsequently spreads sunward and antisunward to produce a sun ...
S. E. Milan, M. K. Mooney, G. E. Bower, G. Kennedy, X.‐Y. Wang, B. Hubert, M. R. Hairston, L. J. Paxton   +7 more
wiley   +1 more source

Vision at high latitudes: High sensitivity without specific boreal adaptations in photoreception in reindeer (Rangifer tarandus L.)

Functional Ecology, Volume 39, Issue 10, Page 2573-2587, October 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The light climate at high latitudes, in particular the extended twilight of winter and the reduced diel variation in light level in midsummer and midwinter, potentially constrains visual function and the synchronisation of temporal organisation in polar species. In this
Nicholas J. C. Tyler, Robert A. E. Fosbury, David Hazlerigg, Christopher Hogg   +3 more
wiley   +1 more source

Swarm Satellite and EISCAT Radar Observations of a Plasma Flow Channel in the Auroral Oval Near Magnetic Midnight [PDF]

, 2018
We present Swarm satellite and EISCAT radar observations of electrodynamical parameters in the midnight sector at high latitudes. The most striking feature is a plasma flow channel located equatorward of the polar cap boundary within the dawn convection ...
Kauristie, K., L. Juusola, A. T. Aikio, Virtanen, I. I., Juusola, L.,, Buchert, Stephan,, Workayehu, A. B., H. Vanhamäki, I. I. Virtanen, S. Buchert, Knudsen, D.,, D. Knudsen, Buchert, S., Kauristie, K.,, Vanhamaeki, H.,, Aikio, A. T., Juusola, L., Vanhamäki, H., Virtanen, I. I.,, K. Kauristie, Workayehu, A. B.,, Knudsen, D., A. B. Workayehu, Aikio, A. T.,   +23 more
core   +2 more sources