The Northern Lights August 2012 (00:30-1:30 UT), Greenland (Denmark)
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1 The Northern Lights August 2012 (00:30-1:30 UT), Greenland (Denmark) The Phenomenon Year 2012: Increase in solar activity. According to latest predictions, the Sun will start its 24 th period of solar maxima in the middle of 2013 (see fig. 1). Solar activity is defined by the number of sunspots detected on the surface of the Sun. As we approach the maximum, the number of sunspots increases, as shown in Figure 1. Figure 1.- Solar activity plot (sunspot number against time). The first maximum corresponds to the last solar maximum (during the end of 2001); predictions indicate that the next maximum will occur in the middle of From the statistics of the last 200 years it is known that the solar maxima (maximum of sunspots) follow a cycle of approximately 11 years (see Fig. 2). NORTHERN LIGHTS
2 Figure 2. - Solar activity during the last 100 years (number of sunspots on the surface of the Sun against time). One of the consequences of the solar maxima is that the Sun increases the emission of very energetic elementary particles (solar wind) in what is called solar storms. The main effects the solar maxima have on Earth are: 1) Interference problems in communications networks (terrestrial and satellites); 2) Possible problems with electricity supply due to the massive arrival of electrons at the terrestrial surface; 3) Possible effects on the terrestrial climate; 4) Increase in frequency and luminosity of polar auroras. In the 1989 solar maximum, and during intense solar storms, several cities in the north of the United States and Canada had serious problems with electricity supply. Several satellites also suffered temporary anomalies in the course of these storms. The relation between solar activity and terrestrial climate has been a subject of debate in the last few years. There are indications that suggest that Earth has cooled down during the solar activity minima. Moreover, a prolonged solar minimum occurred between the years 1645 and 1715 (the Maunder minimum, see Fig. 3) and is thought to have provoked a small ice age, with its effects manifested in Northern Europe NORTHERN LIGHTS
3 Figure 3. - Solar activity during the last 400 years (number of sunspots on the surface of the Sun against time). During the solar maxima the intensity of the solar wind increases, leading to an increase of flux of elementary particles arriving at Earth. These particles are directed towards the magnetic poles where they interact with the Earth s atmosphere, causing the aurora borealis (Northern hemisphere) and the aurora australis (Southern hemisphere). The best zone to observe the aurora borealis is in a circle around the magnetic North Pole (between 60 and 70 degrees North). The magnetic pole does not coincide with the geographic North Pole and moves over time. It is currently located off the coast of the Canadian island of Ellef Ringnes, meaning that southern Greenland is well-placed to view the aurorae. Figure 4. - Aurora Borealis observed in late August of 2011 from the town of Quasiarsuk. The image was taken in Shelios 2011 (see shelios.com/sh2011) expedition (D. Padrón-starryearth.com). NORTHERN LIGHTS
4 The Auroras This wonderful celestial spectacle takes place when very energetic particles from the Sun reach the Earth s atmosphere via the solar wind. The entrance of these particles is governed by the Earth's magnetic field and, therefore, they only can penetrate through the atmosphere at the North Pole (aurora borealis) and the South Pole (aurora australis). The auroras consist of luminous curtains, which change quickly and have several tones. The light emission takes place in the lower atmosphere (at altitudes between 100 and 400 km) and is a consequence of the collision of the solar wind (essentially electrons) with atoms of oxygen (greenish tones) or nitrogen molecules (reddish tones). Expedition Location The Shelios 2012 expedition is promoted by the scientific-cultural association Shelios and is coordinated by its president Dr. Miquel Serra-Ricart, Astronomer of the Institute of Astrophysics of the Canary Islands. The main objective of the expedition will be the observation of the aurora borealis from the South of Greenland, coinciding with the increase of the solar activity. More information available at: Figure 5. - The dark circle indicates where the observations and broadcastings will take place. NORTHERN LIGHTS
5 Broadcasting There will be a daily broadcast between 24 and 28 August 2012 from the surroundings of the Qaleraliq glacier (longitude= w; latitude= n) located in the south of Greenland (see Fig. 5 & 6). The broadcasts will be between 00:30 to 1:30 UT (22:30-23:30 local time of the previous day in Greenland, 2:30-3:30 CET; where UT means Universal Time and CET Central European Time). The event broadcast will be performed at three levels: 1) Live Connections (stream1). Five live connections lasting 50 minutes in total from 24 to 28 August. Every night 10 minutes- 01:00 01:10 UT (23:00-23:10 local time of the previous day in Greenland, 03:00 03:10 CET). M. Serra-Ricart (spanish) & Vanessa Stroud (English) will explain astronomical concepts related with auroras and solar activity and can be watched on the GLORIA live website live.gloria-project.eu and the main collaborator sky-live.tv 2) One-Minute Time-Lapse. Every night during one hour and every minute an image of the starry night will be updated to keep the portal of the broadcast up-to-date. Two color Canon 5D-MarkII with identical lenses will be used (separated a minimum of 1km and a maximum of 50km). These images will be accesibles (URL) in order to do the proposed educational activity. 3) Live sky images (stream2). Every night during one hour a B&W night camera point to the sky and will produce a video streaming of aurora movements. Figure 6. Site camp in the Qaleraliq glacier main broadcasting location. (J.C. Casadostarryearth.com). Educational activity An educational activity is proposed to carried out from aurora images. Activity 1) Calculation of aurora altitude from images using color and parallax methods. NORTHERN LIGHTS
6 Links During the broadcasts we will have daily information on the solar activity through the following nodes: - Latest solar images in different wavelengths from the SOHO Satellite (international cooperation between the ESA and NASA space agencies): - Solar activity and forecasts: Europe: United States: Credits The Seventh Framework Programme of the European Union (EU, FP7/ , INFRASTRUCTURES , INFRA : e-science environments) collaborates with the broadcast though the GLORIA project GLObal Robotic telescopes Intelligent Array for e-science (Grant Agreement Number ). Web Collaborators Participate to the Web distribution: - INAF IASF Bologna. NORTHERN LIGHTS
7 - Institute of Astrophysics of the Canary Islands. - University of Warsaw. - University of Oxford. - Alared Solutions Web S.L. - Canarcloud. - Ireland s National Education and Research Network. Collaborators The FECYT (Spanish Foundation for Science and Technology, Ministry of Science and Innovation) and the IAC (Institute of Astrophysics of the Canary Islands) collaborate in the educational activity Calculation of aurora altitude from images under the activity "Citizen Astronomy within the call for funding for the promotion of scientific culture 2011 (FCT ). - The Army, Canary Command collaborates in satellite communications. - The Iberia Group collaborates in transport logistics. NORTHERN LIGHTS
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