IT Specialist article full of errors
The detailed comment that I posted was rejected, so here is a condensed version:
1. Clean air regs did not cause Arctic warming; unregulated CO2 and black carbon (BC) emissions caused Arctic warming.
2. BC emissions account for 45% or more of Arctic Warming: or, if extending generously out to the upper 1/2 of the Northern Hemisphere, accounts for only 1/8 of global climate change. 7/8 of global warming is still caused by human CO2 emissions.
3. "Dirty Chinese Coal" will not save us, since aerosol emissions from China are in the form of BC, which absorbs heat rather than reflecting heat: this produces more global warming.
4. Boffins's study refers to a short-term local weather variable (not global climate change) confined to the Northern Atlantic (not the whole Atlantic Ocean) produced by natural aerosols from dust storms and volcanoes, which are only temporary weather patterns because aerosols, whether man-made or volcanic, only stay in the atmosphere from a few days to a few weeks at a time (see NASA article) and do not result in long-term centuries-long climate change as human CO2 emissions do. Were it possible for dust storms and volcanoes to produce climate change, natural variations would have produced climate change in pre-industrial times (which it did not). Furthermore, Boffin makes clear in his paper that these observations that he makes in Northern Atlantic weather (not climate) are additional changes on top of ongoing CO2 rise affecting long-term global climate change. Thus, Boffin does not dispute the scientific consensus on CO2 but confirms it, leaving Lewis Page's assertion on carbon simply nowhere.
Open access version of paper is available at http://www.ssec.wisc.edu/~amatoe/
5. Carbon emissions are an overriding concern: once injected into the atmosphere, CO2 remains in the atmosphere for several hundreds of years (unlike BC) before cleared. Until then, CO2 continues to further saturate the atmosphere unabated and continues to be the fastest rising human greenhouse gas. Aerosols, which are also a serious concern, come second after CO2. And as both BC emissions and CO2 emissions are the by-products of coal-burning industrial plants, we have all the more reason to demand a moratorium on these plants to mitigate these dangerous pollutants, whether CO2 or BC, as Hansen has rightfully demanded.
6. The most cost-effective means to tackle emissions is to put a ceiling on CO2, BC, and other dangerous human emissions and reduce them to safer levels. This will encourage energy efficiency to prevent a tipping point and catastrophic climate change. BC should be added to this list of mitigation. Filtering soot from exhausts, in addition to capturing and sequestering CO2, in addition to a moratorium on all new coal plants to be built, is very likely to be necessary to prevent a catastrophic climate change caused by a temperature rise of 2.5 C. This will require climate policies and international agreements that promote energy efficiency and a ceiling and reduction on emissions. The "action plan" is currently estimated by the Stern Review to be 2% of the global GDP. A "no policy ("no action") plan" is estimated to be a 20-30% loss of global GDP (of $54 trillion) by 2100. This is staggering.
Furthermore, the NASA article doesn't clarify whether China employs sulfate scrubbers in their coal plants to remove sulfates (which have a net cooling effect). It only discusses increasing BC aerosols (which have a warming effect) from China via climate model study. Without this clarification and without real world data to back it up, it is difficult to tell whether Arctic warming is truly accelerated by BC aerosol increase or by CO2 emissions increases instead. All we can tell is that it is warming. And at an alarming rate at that.