Open Mind

Entries from August 2009

Sea Level Rise

August 31, 2009 · 21 Comments

Stefan Rahmstorf and Martin Vermeer have an interesting post on RC about very simple models of sea level rise. The simple model is

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Categories: Global Warming
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Pants on Fire

August 31, 2009 · 45 Comments

Recent comments pointed to more outrageous false statements by Ian Plimer. This guy is beyond belief … in more ways than one.

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Categories: Global Warming
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Open Thread #16

August 31, 2009 · 409 Comments

For stuff on the topic of climate, but off topic for other threads

UPDATE: Graphs for the grid box containing Yamal

1yr

5yr

10yr

5yrmov

10yrmov

Categories: Global Warming
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Yes, Virginia, the Arctic is warming … fast

August 28, 2009 · 43 Comments

My attention was directed to this post by Steven Goddard on WUWT. The theme is the rather silly claim that the arctic isn’t really warming — at least, not since 1958.

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Categories: Global Warming
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Loony bin

August 26, 2009 · 47 Comments

A new paper from Landerer et al. (2009, Geophys. Res. Lett., doi:10.1029/2009GL039692, in press) derives the likely motion in earth’s pole caused by thermal expansion of sea water due to global warming. New Scientist has an interesting article about it.

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Methane North and South

August 24, 2009 · 25 Comments

It’s clear that atmospheric methane is on the increase after nearly a decade of stability. We’ve also seen that part of the reason may be the decomposition of methane hydrates on the ocean floor, triggered by the warming of ocean water. As Hank Roberts points out, RealClimate has addressed this issue, highlighting that


It takes decades to centuries to warm up the water 1000 meters down in the ocean, and centuries more to diffuse that heat down into the sediment where the base of the stability zone is. The Arctic Ocean may be a special case, because of the shallower stability zone due to the colder water column, and because warming is expected to be more intense in high latitudes.

Which raises the question, is there a difference between the hemispheres in the amount, and timing, of methane increase in the atmosphere? Rigby et al. (2008) noted that both the timing and magnitude of methane increase was similar for the entire globe. Let’s use more stations, and slightly longer time series, and restrict our comparison to the far north vs. the far south. The World Data Center for Greenhouse Gases has 9 reasonably complete monthly-average time series for stations north of 60 deg.N latitude, and 12 such time series for stations south of 40 deg.S latitude.

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Categories: Global Warming
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Sea Floor Gas

August 23, 2009 · 14 Comments

Last December I reported that atmospheric methane is on the increase after nearly a decade of stability. Part of the reason may be the decomposition of methane hydrates on the ocean floor, triggered by the warming of ocean water.

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Categories: Global Warming
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Constant

August 22, 2009 · 37 Comments

Lucia has a new post in which she presents an analysis showing that my two-box model of the global climate system violates the 2nd law of thermodynamics. But that’s not why she’s banished from commenting here.

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Categories: Global Warming

CO2 and the Volcanoes

August 19, 2009 · 71 Comments

We recently looked at Ian Plimer’s ridiculous claim about CO2 and volcanoes in an opinion piece he wrote for the Australian media. The implication that volcanoes contribute as much or more CO2 to the atmosphere as human activity is one of the most dishonest bits of misdirection in the denialists’ arsenal — so of course it’s one of their most repeated claims.

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Categories: Global Warming
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Astroturf

August 19, 2009 · 1 Comment

Categories: Global Warming
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