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New Svalgaard paper – reconstructing the heliospheric magnetic field since 1835 – with insight into the peer review process
Wednesday, October 7th 2009, 9:45 AM UTC
Co2sceptic (Site Admin)
Leif Svalgaard writes in comments (at WUWT):

We plan to submit tomorrow to JGR the following… (preprint)…showing the run of the heliospheric magnetic field since 1835 [not a typo]. I plan to discuss the whole peer-review process here on WUWT, complete with nasty comments by the reviewers and our responses. This will be an illustration of the peer-review process as it unfolds. Should be interesting. I’ll say. I’ve taken some of the most interesting graphics and put them up for WUWT readers, along with the abstract

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IDV09 and Heliospheric Magnetic field 1835-2009
Leif Svalgaard1 and Edward W. Cliver2
Stanford University, HEPL, Cedar Hall, Via Ortega, Stanford, CA 94305-4085
Space Vehicles Directorate, Air Force Research Laboratory, Hanscom AFB, MA 01731-3010


We use recently acquired archival data to substantiate and extend the IDV index of long-term geomagnetic activity, particularly for years from 1872-1902 for which the initial version of the index (IDV05) was based on observations from very few stations. The new IDV series (IDV09) now includes the interval from 1835-2009, vs. 1872-2004 for IDV05. The HMF strength derived from IDV09 agrees closely with that based on IDV05 over the period of overlap. Comparison of the IDV09-based HMF strength with other recent reconstructions of solar wind B yields a strong consensus between the series based on geomagnetic data, but significant lack of support for a series based on the 10Be cosmic ray radionuclide.

The reconstructed data in the graphic below, from the paper, is quite interesting. Currently, we appear to be at the lowest point in the record.

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Here’s the comparison with the Be10 isotope record:

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