Zobrazeno 1 - 10
of 17
pro vyhledávání: '"William Dean Pesnell"'
Small-scale ephemeral coronal holes may be a recurring feature on the solar disk, but have received comparatively little attention. These events are characterized by compact structure and short total lifetimes, substantially less than a solar disk cr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00d2fce43b17013cf7c8f72d94e95b03
http://arxiv.org/abs/1906.01757
http://arxiv.org/abs/1906.01757
Autor:
William Dean Pesnell
Publikováno v:
Space Weather. 14:10-21
Predictions of solar activity are an essential part of our Space Weather forecast capability. Users are requiring usable predictions of an upcoming solar cycle to be delivered several years before solar minimum. A set of predictions of the amplitude
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8568d54fc1a8eb3e48b8b2c5a16415ae
https://doi.org/10.1002/2015sw001304
https://doi.org/10.1002/2015sw001304
Publikováno v:
Solar Physics. 289:4047-4067
Polar coronal holes (PCHs) trace the magnetic variability of the Sun throughout the solar cycle. Their size and evolution have been studied as proxies for the global magnetic field. We present measurements of the PCH areas from 1996 through 2010, der
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::645c8e0b92bf6b72e1a37caed4be843d
https://doi.org/10.1007/s11207-014-0564-0
https://doi.org/10.1007/s11207-014-0564-0
Publikováno v:
Solar Physics. 289:3381-3390
An analysis of solar polar coronal hole (PCH) areas since the launch of the Solar Dynamics Observatory (SDO) shows how the polar regions have evolved during Solar Cycle 24. We present PCH areas from mid-2010 through 2013 using data from the Atmospher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5cac9bfe0aa617bde6f49213c1b9fd0
https://doi.org/10.1007/s11207-014-0541-7
https://doi.org/10.1007/s11207-014-0541-7
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 104:277-284
It has been found that for more than one polar summer season between 2002-2010, the northern polar mesospheric region near and above about 80 km was warmer than normal. The strongest warming effect of this type was observed to occur during northern s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61043a51bbb0022e540ba6fad3354dd2
https://doi.org/10.1016/j.jastp.2012.11.018
https://doi.org/10.1016/j.jastp.2012.11.018
Autor:
Richard A. Goldberg, William Dean Pesnell, Artem G. Feofilov, Anne K. Smith, C. Y. She, Alexander A. Kutepov
Publikováno v:
Atmospheric Chemistry and Physics. 12:9013-9023
Among the processes governing the energy balance in the mesosphere and lower thermosphere (MLT), the quenching of CO2(ν2) vibrational levels by collisions with O atoms plays an important role. However, there is a factor of 3–4 discrepancy between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6923b4bd5beeeee612ec77c894b2008
https://doi.org/10.5194/acp-12-9013-2012
https://doi.org/10.5194/acp-12-9013-2012
Autor:
William Dean Pesnell, Valentine Yankovsky, Richard A. Goldberg, B. T. Marshall, Larry L. Gordley, Artem G. Feofilov, S. V. Petelina, Manuel López-Puertas, Alexander A. Kutepov, Maya García-Comas, James M. Russell, Rada Manuilova
Publikováno v:
Atmospheric Chemistry and Physics. 9:8139-8158
This paper describes a methodology for water vapor retrieval in the mesosphere-lower thermosphere (MLT) using 6.6 μm daytime broadband emissions measured by SABER, the limb scanning infrared radiometer on board the TIMED satellite. Particular attent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35491b7d56ea49549f8bfa1a98617ea0
https://doi.org/10.5194/acp-9-8139-2009
https://doi.org/10.5194/acp-9-8139-2009
Autor:
William Dean Pesnell
Publikováno v:
Solar Physics. 252:209-220
A summary and analysis of more than 50 predictions of the amplitude of the upcoming Solar Cycle 24 is presented. All of the predictions were published before solar minimum and represent our efforts to anticipate solar maximum at ever-earlier epochs.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf5cd752104312e40a58640b4c31e294
https://doi.org/10.1007/s11207-008-9252-2
https://doi.org/10.1007/s11207-008-9252-2
This volume is dedicated to the Solar Dynamics Observatory (SDO), which was launched 11 February 2010. The articles focus on the spacecraft and its instruments: the Atmospheric Imaging Assembly (AIA), the Extreme Ultraviolet Variability Experiment (E
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 60:607-615
More than 40 rocket flights through the main meteoric ionization layer, which peaks near 95 km, have sampled the meteoric metallic ion concentrations. Five of these flights were conducted during or near the peak times of a meteor shower. In each of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0de53a6cb97e2ea4f6c9ff4d4b15e8d
https://doi.org/10.1016/s1364-6826(98)00004-2
https://doi.org/10.1016/s1364-6826(98)00004-2