However, this doesn't account for feedbacks, for example ice melting and making the planet less reflective, and the warmer
atmosphere holding more water vapor (another greenhouse gas).
The influence of global warming alone on a more moisture starved atmosphere would seem to require fewer and thinner clouds (the warmer atmosphere can
hold more water vapor in suspension without requiring it to condense into cloud).
Rahmstorf said in a follow up email that this is just basic physics, citing the Clausius - Clapeyron equation, which shows that the atmosphere
holds more water vapor when it is warmer, setting the stage for more rainfall.
The Clausius - Clapeyron equation specifies that as the temperature of the air rises the ability of the air to
hold more water vapor rises exponentially.
One of the most likely byproducts of global warming is more extreme precipitation events, as warmer temperatures can
hold more water vapor in the atmosphere.
Some researchers today are taking Trenberth's broad approach and simply highlighting that a warmer
atmosphere holds more water vapor and, thus, suggesting that climate change worsened Harvey's rains.
But by the same token, as global temperatures rise, the atmosphere can
hold more water vapor.
A rather straightforward calculation showed that doubling the level of carbon dioxide in the atmosphere... which would arrive in the late 21st century if no steps were taken to curb emissions... should raise the temperature of the surface roughly one degree C. However, a warmer atmosphere would
hold more water vapor, which ought to cause another degree or so of warming.
Warmer air
holds more water vapor.
I presume this is because a warmer atmosphere can
hold more water vapor, and that rain (or snow) has to come down somewhere.
But there are solid physical reasons to expect acceleration — the radiative imbalance is growing along with the concentrations of GHGs; we are shedding reflective ice from the cryosphere; our warming atmosphere is
holding more water vapor, a potent GHG; and we are melting permafrost and frozen soils to release methane.
First is that warmer air can
hold more water vapor, leading to torrential rains in coastal regions that last longer than usual.
The fact that wamer air can
hold more water vapor is also leading to more drought in continental inland regions, since the soil water goes into the air, but there's less precipitation (due to the warmer, but unsaturated, air).
Warmer air
holds more water vapor than colder air, so the amount of water vapor in the lower atmosphere increases as it is warmed by the greenhouse effect.
Because warmer air can
hold more water vapor, this amplifies the warming effect.
That's enough heat to seriously disrupt the planet's hydrological cycles: Since warm air
holds more water vapor than cold, we've seen steady increases in drought in arid areas (and with it calamities like wildfire) and steady, even shocking, increases in downpour and flood in wet areas.
Warmer air can
hold more water vapor, which can lead to more intense rainstorms, causing major problems like extreme flooding in coastal communities around the world.
This causes the atmosphere to
hold more water vapor, which leads to heavier downpours.
For example, the CO2 - induced global warming allows the atmosphere to
hold more water vapor.
First, there's the well - known fact that a warmer atmosphere can
hold more water vapor, meaning more moisture can be wrung out of the clouds when it does rain.
The moisture component is where climate change comes in — warmer air can
hold more water vapor.»
A warmer atmosphere
holds more water vapor, which is shifting the odds toward more intense rainstorms.
The Southeast U.S., as a whole, has seen a 27 percent increase in the amount of rain during the most intense weather events over the past 60 years, as warmer temperatures are able to
hold more water vapor.
[7][8] A warmer atmosphere
holds more water vapor, feeding more precipitation into all storms including hurricanes, significantly amplifying extreme rainfall and increasing the risk of flooding.
A warmer atmosphere
holds more water vapor.
Warmer air can
hold more water vapor, so specific humidity increases with temperature.
As the atmosphere warms due to human greenhouse gas emissions, it can
hold more water vapor.