That's because for every 1 °F rise in temperature, the atmosphere can hold 4
percent more water vapor.
The fact remains that there is 4
percent more water vapor — and associated additional moist energy — available both to power individual storms and to produce intense rainfall from them.
The fact that the oceans are warmer now than they were, say, 30 years ago means there's about on average 4
percent more water vapor lurking around over the oceans than there was, say, in the 1970s.
But, believe what you wish David, after all there is four
percent more water vapor than really is latent heat:)
In a warmer world, we've gained 7
percent more water vapor in...
For every 1 °F of temperature increase, the atmosphere can effectively hold 4
percent more water vapor.
For every 1 °F increase in temperature, the atmosphere can hold around 4
percent more water vapor, which leads to heavier rain and increases the risk of flooding of rivers and streams.
And more water vapor worldwide is related to the atmosphere being warmer — we have about 7
percent more water vapor in the atmosphere now than we did in the 1950s, which is directly linked to the increase in heavy precipitation events.
One thing is already clear: A warmer global atmosphere currently holds about 3 to 5
percent more water vapor than it did at the beginning of the 20th century, and that can contribute to heavier precipitation.
Not exact matches
New Zealand experienced an extreme two - day rainfall in December 2011; researchers said 1 to 5
percent more moisture was available for that event due to climate change, which is increasing the amount of
water vapor in the atmosphere.
Carbon dioxide is no
more than 4
percent of the total atmosphere — with
water vapor being
more than 90
percent»
The second example demonstrated that, out of 100 people, about 80
percent of them correctly identified the main greenhouse gas (76 % effect from CO2 plus 4
more people who identified
water vapor).
Water vapor on the other hand is a much
more potent climate driver since there is a much larger content with a large variation, from under one
percent (10,000 ppm) to close to 10
percent (100,000 ppm).
They also point out that an increase in stratospheric
water vapor during the 1990s may have led to about 30
percent more warming during that decade than otherwise would have occurred.
The intrusion of 5 - 6
percent (figure from Trenberth via one of Sinclair's «This is Not Cool»)
more water vapor and
more energy in the system is messing with a lot of boundaries.
(A third of summer sea ice in the Arctic is gone, the oceans are 30
percent more acidic, and since warm air holds
more water vapor than cold, the atmosphere over the oceans is a shocking five
percent wetter, loading the dice for devastating floods.)
(
Water vapor is 25x
more abundant in the atmosphere, and 3x greater radiator of solar energy than CO2, so
percent to
percent it is 75x stronger.