All Questions
Tagged with paleoclimatology climate
21 questions
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Estimating global sea level at lower temperatures
In particular I'm interested in finding out what the sea level would be under a sustained average of -1.5°C below the pre-industrial mean, i.e an average global temperature of 12.23°C. However a ...
- 5,155
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1
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257
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Why is it that the Holocene's temperature is much more stable than the Pleistocene?
I'm currently in university for environmental science, and in a lecture on paleoclimate our professor showed some graphs of climate in the Holocene and Pleistocene periods (included below), then ...
- 21
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Ocean oscillations with long time periods
I heard that some ocean oscillations act on a time scale of a millennium. Is this true, or at least argued by some oceanographers? If so, what are they and what causes them? If not, what are the ...
- 615
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Were Carboniferous plants more efficient sequestering $\ce{CO2}$ than present plants?
The Carboniferous was a period where CO2 levels fell drastically.
Source: Geologic history of seawater: A MAGic approach to carbon chemistry and ocean ventilation
I think the main reasons are ...
user20559
1
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204
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Will a new glacial age take place on Earth or Holocene will become a new climatic epoch?
Pleistocene shows a switch between glacial and interglacial ages.
However, humanity is burning fossil fuels and increasing atmosphere's $\ce{CO2}$ content.
Should we expect a new glacial age after ...
user20559
7
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248
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Why is it that "With higher CO2, the dry gets drier and the wet gets wetter"?
The Phys.org article CO2 dip may have helped dinosaurs walk from South America to Greenland quotes Dennis Kent, "adjunct research scientist at Columbia University's Lamont-Doherty Earth ...
- 6,904
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397
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How much of the Earth's surface was covered with water during the Mesozoic?
When the Earth was at its warmest, and there were no ice caps at all, not even during the winter, and thermal expansion meant a certain amount of water took up more space, what ratio of Earth's ...
- 857
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What are the ranges of natural (or pre-industrial era) levels of CO2 in the atmosphere in ppm and tons?
Are the levels of natural (before the industrial revolution) levels of CO2 and ppm known? Also as a related question, should the "natural" levels be considered before the industrial revolution or ...
- 1,137
6
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403
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Geological evidence about climate change: has there ever been a period with a rate of climate change as great as it is today?
Most statistics about climate change are based on climate data over the last 150 year (as long as records have been kept). This seems irrelevant in terms of the geological time scale of temperature ...
- 63
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568
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Does general relativity influence climate (vs Newtonian mechanics)
That may sounds like a silly question but here it is.
One of the early great successes of general relativity was to explain the discrepancy between the prehilion advance of Mercury predicted by ...
- 81
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480
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Did climate cool down when underground hydrocarbons stocks formed?
As far as I understand, the dominant theory of modern climate change says that recent warming is mainly caused by the massive burning of hydrocarbons that used to be stored in solid form mostly ...
3
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109
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volcanic effects on the climate during Pangaea
Which influence does the constellation of the continents have on the global climate? Was the biosphere more susceptible to climatic effects a volcanic eruption may cause during the Permian than it is ...
6
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294
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What caused the earth's climate to stabilise ~10 thousand years ago?
We can see that the last glacial period ended 12-10K years ago. Interestingly enough, this also appears to coincide with the rise of large human civilisations.
My question is: What caused the earth'...
- 925
6
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790
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What does the precessional parameter measure?
I am wondering what is measured in the plots of change of precession, e.g. when describing Milankovitch Cycles. The values typically vary between .06 and −.06. I am also wondering about what the ...
- 61
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361
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Did the surfaces of the oceans freeze over entirely during the snowball Earth periods?
According to the snowball Earth theory, all of Earth froze over at least once (possibly twice) in the far past. However, Wikipedia says that there are opponents of the theory who state that tropical ...
- 928
4
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Confirmation of historical El Niño events
As this year's boreal summer monsoon draws to a close interest automatically centers around forecasts for next summer's monsoon and the likelihood of possibly another El Niño event. This brings about ...
user1066
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Did the Neolithic Revolution have an effect on the earth's climate?
I imagine that human agriculture had a major effect on the composition of flora across the planet's surface.
Did the transition from gathering to growing have a measurable effect on climate? If so, ...
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How has and how does the lithosphere affect climate change?
The climatic system can be divided into five main components: the atmosphere, the hydrosphere, the lithosphere, the cryosphere and the biosphere.
All these physical systems operate at different time ...
- 4,051
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65
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Does the time-lagged correlation between $\ce{CO2}$ and ocean temperature have a shorter timelag than the one between $\ce{CO2}$ and air temperature?
I'm talking about evidence from both proxy records in the last 50,000 years (if possible) and the recent past (if also possible)
- 7,827
17
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How accurate are climate proxies in giving us a clear picture of global average temperatures throughout Earth history?
Since reliable modern records of climate only began in the 1880s, proxies provide a means for scientists to determine climatic patterns before record-keeping began, though it appears that the the ...
- 4,611
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How were we able to measure carbon dioxide levels in earlier climates?
It is said that carbon dioxide levels were much higher during the Cretaceous and Eocene periods: which proxies are used to determine paleo-pCO2?
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