[CF-metadata] approval of standard_names for aerosols and?chemistry for HTAP

[Jonathan Gregory]

Dear Bryan

> As a rule, I think we should avoid discussions by phone, this is a
> community process :-)

Yes, I agree with you. As far as possible, we should discuss things in this
open and archived forum. If we hold private discussions, we ought to summarise
them so all can comment.

Best wishes

Jonathan