[Loops] Is the corona turbulent?

Tue May 18 07:24:09 MDT 2021

Dear "loops" friends,

You might be interested in the paper that Spiro and I just published concerning the role of turbulence in forming the current sheets that spawn nanoflares in the magnetically closed corona:

http://journal.frontiersin.org/article/10.3389/fspas.2021.662861/full?&utm_source=Email_to_authors_&utm_medium=Email&utm_content=T1_11.5e1_author&utm_campaign=Email_publication&field=&journalName=Frontiers_in_Astronomy_and_Space_Sciences&id=662861<https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Flinks.email.frontiersin.org%2Fls%2Fclick%3Fupn%3DDpg5ochww630xh6EMvshS4k2vZe-2Fd8MH-2FVpzt1-2FUQD91C-2FNL5bIclwWnNjv5HD9iMag7H9cVj-2BaBijWs5wuQwUXGW9NyPeWUv4iTl-2BnBax2aHS9bQA35nvW9uq-2Bmr6AtXL2IjuwOUKORbZg-2FzNJWcN4sHVlQ9lSDuuvavFo1L1-2BOVcshXIXHqtOpHeMp-2Fa-2BbbDtcPlJ2HXuZJdPZTjkOw5Lex1j5mMrGLJYOspWWklOaNS4utGQaNCq2OdltDGuiihne27nWtTLT-2FLAzoK-2Fkf-2FaLFgyfGWAKkiFfNpZq3CX0TzZ1RqgJyRmmFYdTNf0hlVVLNisVNAwaj28XBH0jBA-3D-3DG1xp_q-2BdpEcq7WJfuCP40fqxszBBzhAI51DRrBlYKLHUwAsqlRze16Lb99F10xZ8oOHQsitylB-2ByLaxFU2I43-2FK3Y3sTeYZ-2BK3KIkhWpSX6mhmQlu9tLJf6gn2QevfPNmlh-2FzdWe1205-2BgPyGUGHtH9g5hOi4TbpLQEZS7JBcgq-2FvNEjwhPXApPQFawnRYiz1oOfmEDqJO1rIUA3B0xv94si9cELzoijSFWeBOTzl0UtUtxqTiEhy1g6QSXzWA2wXgA4DkQrYG8zw9-2BrhOoZY5D8wkA-3D-3D&data=04%7C01%7Cjames.a.klimchuk%40nasa.gov%7C5e1b386e3d2042eee27f08d919b402e2%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637569083199946822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=hjrQ5rwifhz4O8XDZt6jIUTLTdxEi45UOl%2FQuFGWNOU%3D&reserved=0>

We argue that the sheets form primarily from other processes, unrelated to turbulence. Localized temporary bursts of turbulence may nonetheless be generated when the sheets reconnect.

Abstract:
We argue that the magnetically closed corona evolves primarily quasi-statically, punctuated by many localized bursts of activity associated with magnetic reconnection at a myriad of small current sheets. The sheets form by various processes that do not involve a traditional turbulent cascade whereby energy flows losslessly through a continuum of spatial scales starting from the large scale of the photospheric driving. If such an inertial range is a defining characteristic of turbulence, then the magnetically closed corona is not a turbulent system. It nonetheless has a complex structure that bears no direct relationship to the pattern of driving.

Cheers,
Jim

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James A. Klimchuk
NASA Goddard Space Flight Center
Solar Physics Lab, Code 671
Bldg. 21, Rm. 158
Greenbelt, MD  20771
USA

Phone:  1-301-286-9060<tel:%28301%29%20286-9060>
Fax:      1-301-286-7194<tel:%28301%29%20286-7194>
E-mail:  James.A.Klimchuk at nasa.gov<mailto:James.A.Klimchuk at nasa.gov>
Homepage:  http://science.gsfc.nasa.gov/sed/bio/james.a.klimchuk<http://science.gsfc.nasa.gov/sed/index.cfm?fuseAction=people.jumpBio&&iPhonebookId=15844>

No endorsement by NASA is implied for any correspondence related to my official role in professional organizations.

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