From C3 Headlines and The Hockey Schtick word that the whole Greenland ice loss issue and Atlasgate just got more complex. As a whole Greenland is not responding the same, which suggests regional weather variability as a cause.
From C3 Headlines:
The IPCC’s climate models and its Climategate experts have long predicted that Greenland would lose ice mass due to CO2-induced global warming. Although satellites confirm that Greenland’s glaciers in total have dumped massive amounts of ice into surrounding seas during recent years, these same satellites also confirm that generic global warming is probably not the cause.
In actuality, if Greenland was a casualty of unprecedented global warming, then its glaciers would be losing huge ice mass in unison, as predicted by the IPCC. Instead, as the new Chen et al. study finds, there is huge variability of ice loss among Greenland’s glaciers, which can’t be explained by AGW.
For example, using the advanced technology of the GRACE satellites, scientists determined over the most recent years that:
- Greenland’s northwestern glaciers’ ice loss increased by: 100Gt/yr
- Greenland’s southeastern glaciers’ ice loss decreased by: 109Gt/yr
This study’s scientists suggest that the gigantic variability (that wasn’t predicted) is likely to be a function of regional climate/weather conditions resulting from normal interannual variability.
From The Hockey Schtick
“A paper published…in the Journal of Geophysical Research finds “the loss rate in southeast Greenland for the more recent period has become almost negligible, down from 109 ± 28 Gt/yr of just a few years ago. The rapid change in the nature of the regional ice mass in southeast and northwest Greenland, in the course of only several years, further reinforces the idea that the Greenland ice sheet mass balance is very vulnerable to regional climate conditions.” Global warming allegedly due to greenhouse gases would not be expected to cause such regional interannual variability in Greenland ice loss, thus pointing to shifts in weather instead.” [J. L. Chen, C. R. Wilson, B. D. Tapley 2011: Journal of Geophysical Research]
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 116, B07406, 11 PP., 2011
This study shows dramatic slow down of ice loss in southeast Greenland
Glaciers in northwest Greenland dominate the ice loss since 2007
Greenland ice mass shows significant interannual variability
J. L. Chen et al
Using extended satellite gravity measurements from the Gravity Recovery and Climate Experiment (GRACE), here we show that ice losses in southeast Greenland appear to have slowed down dramatically since late 2007, while those in the west, especially northwest Greenland show continued accelerations in recent years. Over the period April 2002 to November 2009, averaged ice loss rates in eastern Greenland (120 ± 31 Gt/yr) are still significantly larger than those in the west (86.3 ± 22 Gt/yr). However, the estimated ice loss rate from glaciers in northwest Greenland has increased from 30.9 ± 8 Gt/yr over the first few years (2002–2005) to 128.2 ± 33 Gt/yr for the more recent period (2007–2009), while the loss rate in southeast Greenland for the more recent period has become almost negligible, down from 109 ± 28 Gt/yr of just a few years ago. The rapid change in the nature of the regional ice mass in southeast and northwest Greenland, in the course of only several years, further reinforces the idea that the Greenland ice sheet mass balance is very vulnerable to regional climate conditions. The dramatic slow down of ice loss in southeast Greenland observed by GRACE provides an independent verification of similar reports from other remote sensing data. The observed significant interannual variability of Greenland ice mass change suggests that it is very challenging to quantify Greenland’s long-term ice mass change rates, and some observed apparent accelerations might simply be a reflection of the interannual variability.