Dear Language editor,
Thanks for the  edits. We have followed your suggestions, but there
was one point where we suspect a minor misunderstanding and another
one where we were not quite sure about your change:

1. You removed the "and" in the second sentence of the abstract so that
it reads "in the two hemispheres, at small and large scales". This then
suggests that the two aspects are synonymous, which is not the case. We
have now replaced "and" by "as well as" and we have added "both" and twice
"between", so that the entire sentence reads "A fundamental test for
its significance in the solar dynamo is to look for magnetic helicity
of opposite signs both between the two hemispheres as well as between
small and large scales".

2. On page 5, line 10, you wrote "that is," but your marking covered ",
i.e.", so it seemed you wanted us to remove the first comma. We decided,
however, to keep it, so we changed "small-scale limit, i.e., we focus"
to "small-scale limit, that is, we focus".