Helicities in Geophysics, Astrophysics, and Beyond

Helicities in Geophysics, Astrophysics, and BeyondHelicities play essential roles in numerous geophysical, astrophysical, and magnetohydrodynamic phenomena, thus are studied from various disciplinary viewpoints.Helicities in Geophysics, Astrophysics, and Beyond draws together experts from different research fields to present an interdisciplinary and integrated approach to helicity studies. This synthesis advances understanding of the fundamental physical processes underlying various helicity-related phenomena.Volume highlights include:_ Concise introduction to fundamental properties of helicities_ Recent developments and achievements in helicity studies_ Perspectives from different fields including geophysics, space physics, solar physics, plasma physics, atmospheric and nonlinear sciences_ A cohesive mathematical, physical, observational, experimental, and numerical strategy for helicity studies_ A synthesized framework for the application of helicity to real-world problemsThe Am erican Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.

Inhaltsverzeichnis:

List of ContributorsPrefacePart I Helicity Essentials: Basic and Fundamental Concepts1. Introduction to Field Line HelicityAnthony R. Yeates and Mitchel A. Berger2. Magnetic Winding: Theory and ApplicationsDavid MacTaggert3. Transport in Helical Fluid TurbulenceNobumistu YokoiPart II Helicity Manifestations in Nature and Their Observations4. Observations of Magnetic Helicity Proxies in Solar Photosphere: Helicity with Solar CyclesHongqi Zhang, Shangbin Yang, Haiqing Xu, Xiao Yang, Jie Chen, and Jihong Liu5. Chirality of Solar Filaments and the Supporting Magnetic FieldPeng-Fei Chen6. Solar Flares and Magnetic HelicityShin Toriumi and Sung-Hong Park7. Magnetic Helicity Measurements in the Solar WindYasuhito Narita8. Magnetic Helicity in Rotating Neutron StarsMaxim Dvornikov9. Writhing from Biophysics to Solar Physics and BackChristopher Prior and Arron N. Bale10. Kinetic Helicity in the Earth's AtmosphereOtto Chkhetiani and Michael KurganskyPart III Theoretical and Numerical Helici ty Modelling11. Effects of P-Noninvariance, Particles and DynamoViktor B. Semikoz and Dmitry D. Sokoloff12. Stability of Plasmas Through Magnetic HelicitySimon Candelaresi and Fabio Del Sordo13. Helicity-Conserving Relaxation in Unstable and Merging Twisted Magnetic Flux RopesPhilippa Browning, Mykola Gordovskyy, and Alan W. Hood14. Emergence of Magnetic Structure in Supersonic Isothermal Magnetohydrodynamic TurbulenceJean-Mathieu Teissier and Wolf-Christian Müller15. Nonlinear Mean-Field Dynamo with Magnetic Helicity Transport and Solar Activity: Sunspot Number and TiltNathan Kleeorin, Kirill Kuzanyan, Igor Rogachevskii, and Nikolai Safiullin16. The Spatial Segregation of Kinetic Helicity in Geodynamo SimulationsAvishek Ranjan and Peter Davidson