General ⇒ top float too high in two column mode

[scmal]

In two column mode it seems that the top of a float at the top of a column is about 4pt higher than the text in the other column.
Here is a minwrk example:

\documentclass[twocolumn]{article}
\setlength\abovecaptionskip{0pt}
\begin{document}
Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah \newpage
\begin{table}\caption{}\end{table}
Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah Blah
\end{document}

(same for figures, although only noticeable if it is a picture). Is there an equivalent of \@fptop or \@dblfptop for non-float pages that can be used to set the separation?

Many thanks in advance,
Mike