by Peter Sinclair, cross-posted from the Climate Denial Crock of the Week
Since we have such an active community of armchair oceanographers and spreadsheet Glaciologists here, I thought it would be useful to speak to the real thing, the people who actually spend time on the ocean, on the ice sheets, do the measurements, and come back to share that knowledge with us. I had just that opportunity at the American Geophysical conference in December.
I spoke to Josh Willis, Oceanographer with NASA at the Jet Propulsion Lab. Josh is one of best known young ocean scientists on the planet. He pointed me to the recent Kemp et al study of tidal marshes on the US East coast, which has produced a long record of sea level over the last 2000 years, complete with a very Hockey-stickish uptick during the last 200 or so.
[JR: For more on that study, see “NSF Study: Fastest Sea-Level Rise in Two Millennia Linked to Increasing Global Temperatures.”]
Jason Box of the Byrd Polar Center at Ohio State was there, presenting evidence of acceleration in Greenland ice loss over the last 200 years. His bottom line: “If we talk 10 years from now, my expectation is that Greenland will be losing roughly double what it is now.”
I round out the video with takes from old pros lead NASA scientist Jim Hansen and Admiral David Titley, the US Navy’s Chief Oceanographer:
— Peter Sinclair. For more great video segments check out ClimateCrocks.com.
Related Climate Progress Posts:
- Greenland Ice Sheet “Could Undergo a Self-Amplifying Cycle of Melting and Warming … Difficult to Halt,” Scientists Find
- 2010 Spike in Greenland Ice Loss Lifted Bedrock, Implying “We’ll Experience Pulses of Extra Sea Level Rise”
- New study of Greenland under “more realistic forcings” concludes “collapse of the ice-sheet was found to occur between 400 and 560 ppm” of CO2
- JPL finds Polar ice sheet mass loss is speeding up, on pace for 1 foot sea level rise by 2050:
The Greenland and Antarctic ice sheets are losing mass at an accelerating pace, according to a new NASA-funded satellite study. The findings of the study — the longest to date of changes in polar ice sheet mass — suggest these ice sheets are overtaking ice loss from Earth’s mountain glaciers and ice caps to become the dominant contributor to global sea level rise, much sooner than model forecasts have predicted.