Earth temperature

By Gerg, on March 19th, 2014
Geological temperature history of Earth

The average surface temperature of our planet over the ~540 My of the Phanerozoic (since the first proliferation of complex life forms) is a fascinating topic, with some immediate relevance to what we face in the decades and centuries ahead. One of the more startling achievements of the last 30 years of climate science is the production of a large set of actual measurements of temperature history (from physical proxies), replacing much of the earlier geological induction (i.e. informed . . . → Read More: Earth temperature

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Sea surface temperature and snow

By Gerg, on March 13th, 2014

It’s hardly news to suggest that our snow season is affected by Southern Ocean sea surface temperatures (SSTs). The evidence is mostly anecdotal: some claim it’s the Great Australian Bight which controls things, others say it’s the southern Indian Ocean. Here I take a Hadley Centre sea surface temperature reconstruction¹ and compare SST averages in various latitude-longitude boxes with season peak snow depths², to find out.

The HadISST dataset is a 1-degree resolution monthly sea surface temperature reconstruction extending . . . → Read More: Sea surface temperature and snow

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Season 2014 snow depth prediction #1

By Gerg, on March 4th, 2014

One of a series, also see editions: #2, #3, #4, #5

Readers will know that I don’t make my peak depth prediction for the Australian snow season until April, when the required parameters become clearer, but I see that Mr Peterson’s prediction for the 2014 Spencers Creek peak depth is in at a generous 201.2 cm.

Peterson’s method users cycles he detects in the Spencers Creek (near Charlotte Pass, Australia) peak snow depth record applied to its long term trend. . . . → Read More: Season 2014 snow depth prediction, #1

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Warming accelerates!

By Gerg, on March 3rd, 2014

Technical writing rule #303: never, ever use that exclamation thing. Yet there are times when absurdity demands an ugly response. The meme that claims a “pause” in global warming has become so pervasive that even experienced scientists — who ought to know better — have been spouting it¹.

I’m going to show here that recent data suggests an acceleration in warming, not any kind of pause!

In a previous post I showed visually (as others have show statistically) that there . . . → Read More: Warming accelerates!

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