| ▲ | ornel 4 days ago | ||||||||||||||||||||||||||||||||||||||||||||||
Quote from the paper: "the continents are now the leading contributor (44%) to mass-driven GMSL rise". As regards to non-mass-driven rise, another article[0] states, "Ice-mass loss—predominantly from glaciers—has caused twice as much sea-level rise since 1900 as has thermal expansion". I think the findings about sea level rise are as interesting as the ones about fresh water disappearance. | |||||||||||||||||||||||||||||||||||||||||||||||
| ▲ | garrettdreyfus 4 days ago | parent [-] | ||||||||||||||||||||||||||||||||||||||||||||||
The study you cite is talking about sea level rise since 1900 which is a very different story. The IPCC section “9.6.1.1 Global Mean Sea Level Change Budget in the Pre-satellite Era” says Since SROCC, a new ocean heat content reconstruction (Section 2.3.3.1; Zanna et al., 2019) has allowed global thermosteric sea level change to be estimated over the 20th century. As a result, the sea level budget for the 20th century can now be assessed for the first time. For the periods 1901–1990 and 1901–2018, the assessed very likely range for the sum of components is found to be consistent with the assessed very likely range of observed GMSL change (medium confidence), in agreement with Frederikse et al. (2020b; Table 9.5). This represents a major step forward in the understanding of observed GMSL change over the 20th century, which is dominated by glacier (52%) and Greenland Ice Sheet mass loss (29%) and the effect of ocean thermal expansion (32%), with a negative contribution from the LWS change (–14%). While the combined mass loss for Greenland and glaciers is consistent with SROCC, updates in the underlying datasets lead to differences in partitioning of the mass loss.” Edit: by a different story I mean a different story from what is the leading driver of sea level rise. Sea level rise from ice melt was larger since 1900 because sea level rise in general was less fast back then and global mean temperature rise was much smaller so thermosteric sea level rise played less of a role. Thermosteric sea level rise is larger than ground water factors, both will be eclipsed by ice melt in the upcoming century. I would note the authors pointedly do not call it the leading driver of sea level rise. | |||||||||||||||||||||||||||||||||||||||||||||||
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