Not exact matches
But an ice core collected in nearby Greenland suggests that the planet experienced continuous cold from 40,000 to about 115,000 years ago, when the last
warm interglacial period
ended, Miller said.
This causes a
warming / CO2 feedback loop and we
end up perhaps 5C
warmer in an
interglacial.
Remember, we are at or near what would, absent global
warming, be the
end of the current
interglacial phase of the earth's million - year - old climate cycle.
However, if either A we are simply dead wrong about the impact of GHGs and / or B we are missing the forest (solar / astronimical and tectonic things) for the trees (gas mixture things) and the actual future, among the several possible futures, turns out to be one of cooling — possibly the outright
end of the current
interglacial, then all those people wound up to believe in a
warm future are going to be cold, hungry and out for blood.
Since we are currently in one of the
warm «
interglacial» episodes, that implies that, prior to Industrial
warming, we were already at the
warm end of the temperatures to which our biota have adapted.
We are looking at the
end of this
interglacial period based firmly upon historical cycles and norms without any acceleration when compared to previous cycles, as that happens, more
warm would be seen as a blessing.
These include sudden cold events (Heinrich events / stadials),
warm events (Interstadials) and the beginning and
ending of long
warm phases, such as the Eemian
interglacial.
Paleo climate evidence shows we hae the majority of the
warm interglacial period behind us and are moving towards the
end of the holocene
interglacial.
Between global
warming being exagerated (a la Schneider) and its effects actually being a net benefit through increased production of primary producers in the food chain, the chance that the earth is going to cool (Little Ice Age,
end of Holocene
Interglacial, Tambora II) I think it's absolutely nuts to worry about it at all.
The 800 year lag is not that fixed, the lag is 800 years at the
end of a cold period, but several thousands of years at the
end of a
warm interglacial.
Ferdinand Engelbeen said: The 800 year lag is not that fixed, the lag is 800 years at the
end of a cold period, but several thousands of years at the
end of a
warm interglacial.
However, there is plenty of geologic evidence to suggest that our climate is currently nearly as
warm as it can get being at or near the
end of an
interglacial period and that the climate can naturally get
warmer than it currently is without harming any ecosystems.
Do you think you can convince me that we aren't in a
interglacial period that is getting a bit long in tooth, that the Milankovitch cycle that helps the glaciers grow by making northern hemisphere winters
warmer and summers cooler isn't moving in the direction favorable to glaciation, and that the next once - per - thousand year volcanic eruption won't happen in this century, and it won't be the straw that breaks the camel's back by lowering the earth's temperature a couple degrees for a few years to mark the
end of the Holocene?
CO2 clearly lags the
warming that took place 135,000 years ago and even more importantly, it also lagged the cooling that
ended the Eemian
interglacial (
warm period between glacial periods) 117,000 years ago.
You see, my ancestors always knew this
interglacial was just a freak bout of
warm weather, so we've been keeping up with the best cave locations for when it
ends.
Knowing that abrupt and frequent climate changes attend the
end extreme
interglacials, and accepting your premise that CO2 can either cause
warming by whatever process you propose, or ameliorate the drop to the glacial state, applying the Precautionary Principle absolutely requires that we avoid any possibility of climate back - sliding over the next, at least, 4,000 years:
(We are at the
end of an
interglacial period the planet has cooled roughly 2C from the
warmest period during this
interglacial period.
Anthropogenic
warming has interrupted the Glacial -
Interglacial cycle of the Quaternary (Ganopolski et al., 2016; Haqq - Misra, 2014) and there will be no coming Ice - Age n - 1000 years from now to reseal all of this volatile Carbon, as happened at the end of each previous i
Interglacial cycle of the Quaternary (Ganopolski et al., 2016; Haqq - Misra, 2014) and there will be no coming Ice - Age n - 1000 years from now to reseal all of this volatile Carbon, as happened at the
end of each previous
interglacialinterglacial.