The main constituent of rising sea levels comes from the thermal expansion of the oceans as temperatures rise. Land based melting ice and snow will also contribute, but obviously melting ice burgs won’t for the reasons stated by the questioner!
I photoed a bright light in the sky overead tonight and when I koomed in on it it was round with bright coloured rings round it. Can you please tell me what it may be. I can send you a copy of the photo if necessary.
Thanks,
Alan