Thursday, November 04, 2021

Episodic cycles of deluges, a new and completely unexpected atmospheric state

Recommendable! This research also confirms how little we actually know about earth's climate. The Global Warming (hoax) and the Climate Change (religion) are based on pseudoscience and the pretense of knowledge!

Remember: The sun is the most important influence on earth's climate and the sun is not constant in its output of radiation!
I also bet that the sun radiation fluctuates over much shorter time spans than millions of years! The well known short-term solar cycles (a.k.a. sunspot cycles) is one example!

This professor Wordsworth looks very young. Perhaps, he never read the Old Testament of the Bible, otherwise he would have known about at least one major deluge! Or what about the epic of Gilgamesh. See also Flood myths

"... earth 20 to 30 degrees Fahrenheit hotter than today. Earth likely experienced these temperatures at various times in the distant past and will experience them again hundreds of millions of years from now as the sun continues to brighten

Little is known about how the atmosphere and climate behaved during these so-called hothouse periods. In a new study, researchers from Harvard University found that during these epochs of extreme heat, Earth may have experienced cycles of dryness followed by massive rainstorms hundreds of miles wide that could dump more than a foot of rain in a matter of hours. ...
“This episodic cycle of deluges is a new and completely unexpected atmospheric state” said Robin Wordsworth ... Professor of Environmental Science and Engineering at SEAS and senior author of the study. ...
In an atmospheric model ... cranked up Earth’s sea surface temperature to a scalding 130 degrees Fahrenheit, either by adding more CO2 — about 64-times the amount currently in the atmosphere — or by increasing the brightness of the sun by about 10 percent. ..."

From the abstract:
"... Here we conduct simulations that explicitly resolve convection and find that lower-tropospheric radiative heating in hothouse climates causes the hydrologic cycle to shift from a quasi-steady regime to a ‘relaxation oscillator’ regime, in which precipitation occurs in short and intense outbursts separated by multi-day dry spells. The transition to the oscillatory regime is accompanied by strongly enhanced local precipitation fluxes, a substantial increase in cloud cover, and a transiently positive (unstable) climate feedback parameter. ..."
On ancient Earth, it never rained but it poured Extreme heat led to episodic deluges on hothouse Earth

Episodic deluges in simulated hothouse climates (no public access)

Prof. Wordsworth


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