Wattsupwiththat.com notes that this study pulls from 90-95% of the same raw data as previous studies and that it has not been peer reviewed yet.
The new study does not try to determine the cause of global warming, that is how much is from human causes.
The Nextbigfuture position is that outdoor air pollution is the immediate health and economic threat that is causing the premature death of 1.3 million people each year andbirth defects and other disease and sickness.
The actions to correct air pollution largely overlap with the steps to mitigate any possible global warming. So fix the clear problem of air pollution and you would also take to fix global warming.
* get 700 million soot free cookers to the developing world. Costs about $70 billion. Would save 1.9 million lives per year from indoor air pollution and the lowered soot would equal an 8% of current carbon dioxide reduction. It would also save more lives with solar cookers by allowing developing people to boil more water without considering fuel costs and reduce health problems and death from unclean water
* Adopt Euro 6 air pollution standards for cars and trucks and install better particle filters on cars and trucks
* Retrofit existing coal, natural gas and other fossil fuel power generation and industrial plants with air pollution mitigation technology
* Uprate existing nuclear power plands and build more nuclear power
Analyzing temperature data from 15 sources, in some cases going as far back as 1800, the
− The urban heat island effect is locally large and real, but does not contribute significantly to the average land temperature rise. That’s because the urban regions of the Earth amount to less than 1% of the land area.
− About 1/3 of temperature sites around the world reported global cooling over the past 70 years (including much of the
“The large number of sites reporting cooling might help explain some of the skepticism of global warming,” Rohde commented. “Global warming is too slow for humans to feel directly, and if your local weather man tells you that temperatures are the same or cooler than they were a hundred years ago it is easy to believe him.” In fact, it is very hard to measure weather consistently over decades and centuries, and the presence of sites reporting cooling is a symptom of the noise and local variations that can creep in. A good determination of the rise in global land temperatures can’t be done with just a few stations: it takes hundreds or better, thousands of stations to detect and measure the average warming. Only when many nearby thermometers reproduce the same patterns can we know that the measurements were reliably made.
Four scientific papers setting out these conclusions have been submitted for peer review and will form part of the literature for the next IPCC report on Climate Change.