PPT-An overview of the cycle variations in the solar corona

Louise Harra lkh mssluclacuk UCL Department of Space and Climate Physics Mullard Space Science Laboratory Extended solar minimum Hinode Xray corona 2007 Oct 2009 Apr The solar wind is weaker . Roberto J. Pérez (UPRM). Charles . Kankelborg. (MSU). Sarah . Jaeggli. (MSU). Abstract. The AIA instrument on the Solar Dynamics Observatory obtains images of the sun in seven different extreme ultraviolet wavebands. Each filter produces images with distinctive appearance that is apparent to experienced observers. Subjective descriptions abound in the literature and in conference presentations, as do qualitative explanations of the physical reasons for these differences. We seek a quantitative description of the image properties, with the aim of understanding what the general image properties indicate about the temperature structure of the corona. Our preliminary results, obtained at multiple heliocentric angles above and below the limb, show that some channels consistently present a high or low intensity contrast which we attribute to the differing temperature, density and filling factor of the structures imaged. We also investigate the power spectra characteristic of each waveband. . Steven R. Spangler, University of Iowa. Division of Plasma Physics, American Physical Society. To gain a perspective on gaseous media in space, first consider a more familiar gaseous medium….the Earth’s atmosphere. Response of the Earth’s environment to solar radiative forcing. Ingrid Cnossen. British Antarctic Survey. Outline. Previous lecture. Intro to atmosphere structure and processes. Absorption of solar radiation. Mark Weber, Joseph . Pagaran. , Stefan Noël, . Klaus . Bramstedt. , and John P. Burrows. weber@uni-bremen.de. TOSCA Workshop, Berlin, 14-16 April 2012. Motivation. x. SCIAMACHY . observes. SSI in UV/. . Alexei A. . Pevtsov. US National Solar Observatory. What is Space Climate Anyway?. SW–SC Similarities. Same drivers (solar eruptive events, open magnetic fields/CHs, solar wind). Similar spatial scales (quiet Sun, large-scale magnetic fields).. The core of the sun is . approx. . 15,000,000 . degrees . Kelvin. . . The sun gives out heat by turning Hydrogen into Helium (it loses about . 4,000,000 . Hydrogen . tons . per second doing this). All the energy is created in the core of the sun, this energy is transferred to the surface by radiation. However we receive the heat in the form of Radiation.. Lightning and Climate Earle Williams MIT Franklin Lecture AGU Fall Meeting San Francisco, CA December 5, 2012 Outline Global perspective on thunderstorms and world views CAPE versus aerosol control of lightning in present climate Lightning and Climate Earle Williams MIT Franklin Lecture AGU Fall Meeting San Francisco, CA December 5, 2012 Outline Global perspective on thunderstorms and world views CAPE versus aerosol control of lightning in present climate In paper I (Huang et al. 2012, ApJ, 755), we showed that solar minimum, quiet-Sun coronal loops exhibited new structures we dubbed ``down-loops” - loops in which the temperature decreases with height Nishu Karna. Mentor: Dr. William Dean . Pesnell. Code: 671. SESI Program-2010. Goddard Space Flight Center. Date: August 4, 2010. Coronal Hole :- . Large dark regions in the Sun’s corona that are cooler and have lower density plasma than average.. . Zharkova V.V.. 1. , Shepherd S.J.. 2. and Popova E.. 3. 1 – . Northumbria. University, Newcastle, UK. 2 – Le Sorbonne . Universite. , France. 3 - . Skolkovo. Institute of Science and Technology, Russia . on. Stratospheric Circulation Patterns. Yonatan Givon. Chaim . Garfinkel. The Hebrew University of Jerusalem. Freddy and Nadine Hartman Institute of Earth Sciences. Solar variability. Well . understood impacts on climate:. Mark Weber, Joseph . Pagaran. , Stefan Noël, . Klaus . Bramstedt. , and John P. Burrows. weber@uni-bremen.de. TOSCA Workshop, Berlin, 14-16 April 2012. Motivation. x. SCIAMACHY . observes. SSI in UV/. Chapter Two. Ionospheric Variations. Introduction. The ionosphere is not a stable medium, this will not allow the use of single radio frequency over the year, or even over 24 hours to setup a successful communication link. .