Most climate models overestimate the increase in global precipitation due to climate change, according to an analysus of over 25 models and found they underestimate the increase in absorption of sunlight by water vapor as the atmosphere becomes moister, and therefore overestimate increases in global precipitation.

The team found global precipitation increase per degree of global warming at the end of the 21st century may be about 40 percent less than what the models, on average, currently predict. 

Carbon dioxide emissions have always been something of a guess because they rely on self-reported figures. The developed world has been transparent but it was only a few years ago that China admitted to under-counting its own emissions, telling a different tale than the pollution clouds that wafted into other countries did.

After a decade of rapid growth in global CO2 emissions, spurred on by increases in China which offset declines in the US and Europe thanks to natural gas, increases have leveled off: 2012 saw only 0.8%, 2013 was 1.5% and 2014 was 0.5%. Last year, the world's economy continued to grow by 3% overall and even China's unrelenting emissions were held in check.

To some, that means the decoupling of CO2 emissions from global economic growth. To others, it signals that the developed world has given up on manufacturing. Instead, a country like India can increase its emissions by 7.8% and became the fourth largest emitter globally while claiming the same developing nation status China and Mexico do.

Ancient climates on Earth may have been more sensitive to carbon dioxide than was previously thought, according to an analysis of nahcolite crystals found in Colorado's Green River Formation, formed 50 million years old during a hothouse climate.

Scientists found that CO2 levels during this time may have been as low as 680 parts per million (ppm), nearly half the 1,125 ppm predicted by previous experiments. The new data suggests that past predictions significantly underestimate the impact of greenhouse warming and that Earth's climate may be more sensitive to increased carbon dioxide than was once thought

The rainwater that fell in some of the villages of Zamora, Spain last autumn brought along a green microalgae that turns a reddish color when in a state of stress.  Blood rain. It is not an isolated phenomenon.  Kerala, India got a blood rain in the summer of 2001 and since then so has the southern part of the country and Sri Lanka. Scientific studies have confirmed that the algae Trentepohlia was responsible for those events. 

The long history of severe droughts across Europe and the Mediterranean has largely been told through historical documents and ancient journals but an atlas based on scientific evidence uses tree rings to map the reach and severity of dry and wet periods across Europe, parts of North Africa and the Middle East, year to year over the past 2,000 years.

The Old World Drought Atlas significantly adds to the historical picture of long-term climate variability over the Northern Hemisphere. In so doing, it should help climate scientists pinpoint causes of drought and extreme rainfall in the past, and identify patterns that could lead to better climate model projections for the future. 

Mars doesn't have much in the way of Earth-like weather, it does evidently share one kind of weird meteorology: acid fog. 

Astronomer Shoshanna Cole of Ithaca College gathered data from instruments on the 2003 Mars Exploration Rover Spirit and suggests acidic vapors may have eaten at the rocks in a 100-acre area on Husband Hill in the Columbia Hills of Gusev Crater on Mars. 

The work focused on the 'Watchtower Class' outcrops on Cumberland Ridge and the Husband Hill summit. 

It's become common for vegetarians and environmental activists to criticize animals. Cows, for example, used to be criticized for carbon dioxide production, with manufactured claims like "it takes a gallon of gas to make a pound of beef" but that has long been debunked and CO2 is dropping thanks to natural gas, so anti-science groups have turned toward methane.

While it's true that methane has 23X the warming effect of CO2, it is so short-lived as to be silly from a physics point of view, but so are the anti-vaccine and anti-GMO movements, and those still raise a lot of money for groups. 

The 2015 Antarctic ozone hole area was larger and formed later than in recent years, accorrding to a new paper. On Oct. 2, 2015, the ozone hole expanded to its peak of 10.9 million square miles, an area larger than the continent of North America.

Throughout October, the hole remained large and set many area daily records. Unusually cold temperature and weak dynamics in the Antarctic stratosphere this year resulted in this larger ozone hole.

In comparison, last year the ozone hole peaked at 24.1 million square kilometers (9.3 million square miles) on Sept. 11, 2014. Compared to the 1991-2014 period, the 2015 ozone hole average area was the fourth largest.

One of the great hypocrisies in climate negotiations a decade ago was exempting China from any agreement by giving them "developing nation" status. The rationale was that their emissions were not that high, according to Europe, who had remained fans of nuclear energy and therefore used less fossil fuels.

But scientists knew that policy-makers and activists were using self-reported claims about the emissions. Soon, better measurement techniques began to show giant streams of CO2 coming out of the communist nation and the problem could no longer be denied. When they hosted the Olympics in Beijing, they banned cars for all but wealthy elites and visiting tourists, which made a difference, but isn't really a solution for countries with freedom.