Tandil Breaks September Cold Record; Benchmarks Fall Across California And Oregon; Greenland Models Disagree By 177 Billion Tons; + Clouds Expose More Climate Model Flaws

This year, the Greenland ice sheet either lost 171.8 billion tons or gained 4.8 billion tons—depending on which official surface-mass-balance model you use.

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matt
matt
1 month ago

Part of the reason for the difference between the 2 estimates of Greenland’s surface mass balance could be how the models calculate temperature change with increase in altitude, the lapse rate. Most of the PROMICE weather stations are around the edge of the ice sheet and therefore at a fairly low altitude whereas the surface of a lot of the ice sheet is hundreds or even 1000+ metres above sea level.. The rate at which temperature decreases with height depends on the amount of water vapour in the atmosphere. In very dry air it can drop by almost 1C for every 100m of height gain, when there’s a lot of water vapour in the atmosphere there’s far less temperature decrease with altitude. If the models can’t get lapse rate correct then predicted temperatures over much of the ice sheet will be wrong and in summer will predict the wrong amount of melting

David
David
1 month ago

Then it got warm – live in Los Angeles – was 111 yesterday – we had about 10 days of very warm weather. One more day of this then back to normal

jay
jay
1 month ago

My N Alabama temps all low to mid-90s the next 7 days, excepting one rainy day, for mid 80s there.

Deb
Deb
1 month ago
Reply to  jay

Well, that’s what you get for living in the South. My Dad used to say that Missouri has the climate of a Southern state in the summer and a Northern state in the winter. We get the worst of both worlds, and climate change or not, it looks like we’re stuck with it.

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