Second, by «bidirectional causation» Karlsson seems to be referring to the idea that ``... after the last ice age
initial warming cause [d] additional carbon dioxide to enter the atmosphere from the ocean, which led to even more warming.»
Expectation of small but positive CO2 - greenhouse warming is consistent with his claims of strong negative feedbacks by upper tropospheric water vapor or cirrus clouds which would lose sense without
initial warming in the global tropics.
The catastrophe comes from the assumption that there are large net positive feedbacks in the climate system that multiply a
small initial warming from CO2 many times.
I recall during
our initial warm - up session many of the new incoming freshmen were staring at us coaches with slight fear and demons of doubt.
The scientists pin
the initial warming on staggering volcanic eruptions that created India's Deccan Traps around the same time period.
A high short - term sensitivity suggests that the medium - term sensitivity, which builds on
the initial warming, is also high.
And those feedbacks ultimately determine the extent to which that
initial warming will be amplified, but they don't even change the fact that you elevate greenhouse gas concentrations in the atmosphere and you'll get a warming of the surface.
After
an initial warm - up and a bit of ab work, the instructor had us practice our Beyoncé strut, because no one walks with more confidence than her.
After
some initial warm up laps, things started to heat up.
Depending on weather conditions, population explosions typically occur five to six weeks after
the initial warm - up.
A positive cloud feedback loop posits a scenario whereby
an initial warming of the planet, caused, for example, by increases in greenhouse gases, causes clouds to trap more energy and lead to further warming.
35, L20704, doi: 10.1029 / 2008GL035333, 2008], due to Andrew Dessler and his colleagues, who (as you would know) used the Atmospheric Infrared Sounder (AIRS) on NASA's Aqua satellite to show that the water - vapor feedback is strongly positive, tending to double
the initial warming due to CO2 itself.
Climate Myth: Climate sensitivity is low «His [Dr Spencer's] latest research demonstrates that — in the short term, at any rate — the temperature feedbacks that the IPCC imagines will greatly amplify
any initial warming caused by CO2 are net - negative, attenuating the warming they are supposed to enhance.
From
the initial warming and ice age retreat when plants and animals re-colonised there have been several events.
To be clear Both Zeebe's and the Kirtland Turner & Ridgwell study are talking about
the initial warming of the PETM and the initial pulse of carbon that caused it.
The initial warming also reduces the surface albedo by melting snow and sea - ice, which likewise constitutes a positive feedback because snow and ice are effective reflectors of sunlight.
Thus as the negative NAO persists,
the initial warm pulse into the Arctic is exhausted and followed by cooling trend decades later.
A feedback that reduces
an initial warming is a «negative feedback.»
A feedback that increases
an initial warming is called a «positive feedback.»
If the level of CO2 in the atmosphere suddenly doubled,
the initial warming over 10 years would be less than a degree, in part because the build - up takes time and also because the oceans slowly take up the heat, and act as a buffer.
While the orbital cycles triggered
the initial warming, overall, more than 90 % of the glacial - interglacial warming occured after that atmospheric CO2 increase (Figure 2).
One rational way to explain the short - lived nature of the MWP is to conclude that the water vapour
the initial warming produced had a moderating, ie, negative feedback, on the warming.
Some, but not all, of that radiation is scattered back to the earth, re-warming it, but never more than
the initial warming.
Lomborg points out that all the IPCC models round up
the initial warming measurement from.6 C to 1.0 C.
The combination of saying that an unknown process (which is a blatant lie) starts
the initial warming which is then taken over after 800 years by the CO2 feedback is absurd.
Of course, they are all negative: They counteract
the initial warming, independent of the cause for the warming.