During Joe's portion, he noted that the SLR attributed to GIA and sediment compaction are natural and not related to anthropomorphic sources. My understanding is that GIA is occurring as the ice sheets melt (which is natural as we left the last ice age but is speeding up due to human-related warming of the planet) and sediment compaction is at least somewhat driven by groundwater withdrawal by humans so I am not clear on why those are not anthro-driven. Thanks for any clarification on that!
