نتایج جستجو برای: polar plumes
تعداد نتایج: 49061 فیلتر نتایج به سال:
Throughout its high-latitude excursion Ulysses has observed several types of solar wind structures. In addition to structures such as Alfven waves, compressional features, and microstreams, the solar wind also contains low contrast pressure-balance structures (PBSs). The PBSs are marked by an anti-correlation of the plasma and field pressures; their signatures are often hidden by the comparativ...
Fast streams of the solar wind with speeds of up to ≈ 800 km s−1 at a distance of 1 AU (astronomical unit) from the Sun are known to originate in solar coronal holes. With the Solar and Heliospheric Observatory (SOHO) detailed studies of the solar wind source regions have been made possible for the first time. We show images of solar polar coronal holes in the extreme ultraviolet (EUV), which w...
[1] The impact of aerosols on regional air quality and climate necessitates improved understanding of their emission and microphysical properties. The size distributions of black carbon (BC) and light scattering particles (LSP) were measured with a single particle soot photometer on board the NASA DC-8 aircraft during the ARCTAS mission 2008. Air sampling was made in the air plumes of both urba...
Abstract. We estimated geometric plume heights for the daytime eruptions of La Soufrière in April 2021 using visible red band geostationary side views and geostationary–polar orbiter stereo views. Most plumes either spread near tropopause at 16–17 km altitude or penetrated stratosphere 18–20 altitude. Overshooting tops reached up to 23 km. These were compared with radiometric corresponding cold...
The propagating intensity disturbances (PIDs) in plumes are still poorly understood and their identity (magnetoacoustic waves or flows) remains an open question. We investigate PIDs five located the northern polar coronal hole observed during 2017 total solar eclipse. Three associated with bright points, jets macrospicules at base (active plumes) other two not (quiet plumes). electron temperatu...
This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Megacities are extreme examples of the continuously growing urbanization of human population that pose (new) challenges to the environment and human health at a local scale. However, because of their size megacities a...
Introduction: Enceladus is the sixth-largest moon of Saturn and has a diameter of approximately 504 km. The icy moon synchronously orbits Saturn at a distance of approximately 238,000 km once every 33 hours between Mimas and Tethys [1] but is locked in a 1:2 resonance with Dione resulting in an orbital eccentricity of 0.0047 [2]. However, Enceladus is very different from other Saturnian moons, ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید