[Loops] type II spicule paper

[Klimchuk, James A. (GSFC-6710)]

Right, Piet.   They are totally unrelated.

Jim

> -----Original Message-----
> From: loops-bounces at solar.physics.montana.edu [mailto:loops-
> bounces at solar.physics.montana.edu] On Behalf Of Petrus Martens
> Sent: Tuesday, July 31, 2012 10:33 AM
> To: loops at solar.physics.montana.edu
> Subject: Re: [Loops] type II spicule paper
> 
> On 7/31/12 8:27 AM, Hugh S. Hudson wrote:
> > It may be a great paper, but why is there no citation of Scudder's work?
> 
> Would have been useful.  I don't think Jim's results invalidate Scudder's
> results though.
> 
> Piet
> 
> 
> >
> > Hugh
> >
> > On 31 Jul 2012, at 16:12, Petrus Martens wrote:
> >
> >> Hey, great paper!  Glad that someone looked into that.
> >>
> >> Cheers,
> >>
> >> Piet
> >>
> >> On 7/31/12 7:47 AM, Klimchuk, James A. (GSFC-6710) wrote:
> >>> Dear friends,
> >>>
> >>>       You might be interested in my recent paper on "The Role of
> >>> Type II Spicules in the Upper Solar Atmosphere,"  which can be
> >>> downloaded at
> >>> http://arxiv.org/abs/1207.7048
> >>>
> >>> Cheers,
> >>>
> >>> Jim
> >>>
> >>> ABSTRACT:
> >>>
> >>> We examine the suggestion that most of the hot plasma in the Sun's
> >>>
> >>> corona comes from type II spicule material that is heated as it is
> >>>
> >>> ejected from the chromosphere.  This contrasts with the traditional
> >>>
> >>> view that the corona is filled via chromospheric evaporation that
> >>>
> >>> results from coronal heating.  We explore the observational
> >>>
> >>> consequences of a hypothetical spicule dominated corona and conclude
> >>>
> >>> from the large discrepancy between predicted and actual observations
> >>>
> >>> that only a small fraction of the hot plasma can be supplied by
> >>>
> >>> spicules (<2% in active regions and <5% in the quiet Sun).  The
> >>>
> >>> red-blue asymmetries of EUV spectral lines and the ratio of lower
> >>>
> >>> transition region (LTR; T<0.1 MK) to coronal emission measures
> >>>
> >>> are both predicted to be 2 orders of magnitude larger than observed.
> >>>
> >>> Furthermore, hot spicule material would cool dramatically by
> >>>
> >>> adiabatic expansion as it rises into the corona, so coronal heating
> >>>
> >>> would be required to maintain the high temperatures that are seen at
> >>>
> >>> all altitudes.  The necessity of coronal heating is inescapable.
> >>>
> >>> Traditional coronal heating models predict far too little emission
> >>>
> >>> from the LTR, and we suggest that this emission comes primarily from
> >>>
> >>> the bulk of the spicule material that is heated to <0.1 MK and
> >>>
> >>> is visible in He II (304 A) as it falls back to the surface.
> >>>
> >>>
> **************************************************************
> ******
> >>> ************
> >>>
> >>>
> >>> 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
> >>>
> >>> Fax:      1-301-286-7194
> >>>
> >>> E-mail: James.A.Klimchuk at nasa.gov
> <mailto:James.A.Klimchuk at nasa.gov>
> >>>
> >>> Homepage:
> >>>
> https://sedupdate.gsfc.nasa.gov/sed/index.cfm?fuseAction=people.jump
> >>> Bio&&iPhonebookId=15844
> >>>
> >>>
> >>> No endorsement by NASA is implied for any correspondence related to
> >>> my role as an officer of professional organizations (American
> >>> Geophysical Union, International Astronomical Union, American
> Astronomical Society).
> >>>
> >>>
> **************************************************************
> ******
> >>> ************
> >>>
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Loops mailing list
> >>> Loops at solar.physics.montana.edu
> >>> https://mithra.physics.montana.edu/mailman/listinfo/loops
> >>>
> >>
> >> <martens.vcf>_______________________________________________
> >> Loops mailing list
> >> Loops at solar.physics.montana.edu
> >> https://mithra.physics.montana.edu/mailman/listinfo/loops
> >
> > _______________________________________________
> > Loops mailing list
> > Loops at solar.physics.montana.edu
> > https://mithra.physics.montana.edu/mailman/listinfo/loops
> >
> >
> >