I don't believe so. Does the blank line have whitespace or is it totally empty? If the former you can use something like this:
:nnoremap <leader>^ kg^j
Or, courtesy of Mass, just
:nnoremap <leader>^ -j
<leader>^
can be replaced with any unused key combo you like. Enter it while in Normal mode and you'll get the effect you need. (If you want it to work with wrapped lines, too, then use gkg^gj
)
If the blank line is totally empty there's no easy way to go to an arbitrary column. You have to insert the appropriate amount of whitespace first. (Well, that's a bit of a lie...you can use :set virtualedit=all
but that's probably going beyond what you have in mind.)