Meridional flow in the Sun’s convection zone is a single cell in each hemisphere

doi:10.1126/science.aaz7119

GSTDTAP > 气候变化

DOI	10.1126/science.aaz7119
	Meridional flow in the Sun’s convection zone is a single cell in each hemisphere
	Laurent Gizon; Robert H. Cameron; Majid Pourabdian; Zhi-Chao Liang; Damien Fournier; Aaron C. Birch; Chris S. Hanson
	2020-06-26
发表期刊	Science
出版年	2020
英文摘要	The activity of the Sun, including the occurrence of sunspots, is driven by magnetic fields that originate from the motion of charged plasma beneath the surface. Helioseismology uses acoustic oscillations to probe the Sun's interior, analogous to seismology's use of earthquakes to investigate Earth's interior. Gizon et al. analyzed helioseismology data from 1996 to 2019, covering two 11-year solar cycles. They measured the latitudinal and radial flow of plasma as a function of depth within the Sun and how it varies with time. The results support magnetic flux-transport dynamo models, which can explain the distribution of sunspots over each solar cycle. Science , this issue p. [1469][1] The Sun’s magnetic field is generated by subsurface motions of the convecting plasma. The latitude at which the magnetic field emerges through the solar surface (as sunspots) drifts toward the equator over the course of the 11-year solar cycle. We use helioseismology to infer the meridional flow (in the latitudinal and radial directions) over two solar cycles covering 1996–2019. Two data sources are used, which agree during their overlap period of 2001–2011. The time-averaged meridional flow is shown to be a single cell in each hemisphere, carrying plasma toward the equator at the base of the convection zone with a speed of ~4 meters per second at 45° latitude. Our results support the flux-transport dynamo model, which explains the drift of sunspot-emergence latitudes through the meridional flow. [1]: /lookup/doi/10.1126/science.aaz7119
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/278214
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Laurent Gizon,Robert H. Cameron,Majid Pourabdian,等. Meridional flow in the Sun’s convection zone is a single cell in each hemisphere[J]. Science,2020.
APA	Laurent Gizon.,Robert H. Cameron.,Majid Pourabdian.,Zhi-Chao Liang.,Damien Fournier.,...&Chris S. Hanson.(2020).Meridional flow in the Sun’s convection zone is a single cell in each hemisphere.Science.
MLA	Laurent Gizon,et al."Meridional flow in the Sun’s convection zone is a single cell in each hemisphere".Science (2020).