Sentences with phrase «warm period at the end»

Today, we are in a warm period at the end of an ice age.

And in many places, it's moving faster than the ice is thought to have retreated during the warming period at the end of the last ice age, around 20,000 years ago.

The purveyors of the new eco-religion can try to deny its existence as much as they want and the fact that there is more than enough historical evidence that it was at least as warm (more likely significantly warmer) during this period of the millenial past than it may have been during the recent warming period at the end of the 20th century.

You have two artificial temporary cold weather periods lasting a few years and tapering off in the beginning half of the series, El Chichón in 1982 and Mount Pinatubo in 1991 injecting aerosols / SO2 and cooling the surface temperature, then we have a temporary warm period at end of the series caused by recent El Niño in 2015 - 6.

You can choose to be alerted when the brewing is finished, and when the Keeping Warm period at the end as started and finished.

Not exact matches

The giant lycopsids died out at the end of the Carboniferous period when global warming dried up the swamps.

Their excellent night vision and apparent warm blood raise a question: Could they have survived icehouse conditions at the end of the Cretaceous period?

If you look at the proxy portion of the new Moberg graphic, you see nothing that would be problematic for opponents of the hockey stick: it shows a striking Medieval Warm Period (MWP), a cold Little Ice Age and 20th century warming not quite reaching MWP levels by 1979, when the proxy portion of the study ends.

So what is the time difference between CO2 levels during the onset of a cooling period at the end of a warming period and the time history of the temperature changes in the ice cores?

Those rapid global warming events were almost always highly destructive for life, causing mass extinctions such as at the end of the Permian, Triassic, or even mid-Cambrian periods.

At the low end of sensitivity, we are living in a period of over reaction by the climate and the rate of warming should tend to revert lower towards the equilibrium value.

I just meant that a thousand year period of stable temperature which happens to have a rapid warming trend at the end of the series is absolutely nothing out of the ordinary with regards to «other» thousand years periods in the Holocene.

So what is the time difference between CO2 levels during the onset of a cooling period at the end of a warming period and the time history of the temperature changes in the ice cores?

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.

As these particular events took place at the end of a local warm period caused by orbital forcing (see Box 6.1 and Section 6.5.1), these observations suggest that under gradual climate forcings (e.g., orbital) the climate system can change abruptly.

So what happened in 2015 is what is supposed to happen when an El Niño is superimposed upon a warm period or at the end year of a modest warming trend.

«At the end of the last ice age around 11,000 years ago, the ice sheet went through a period of rapid, sustained ice loss when changes in global weather patterns and rising sea levels pushed warm water closer to the ice sheet — just as is happening today,» NASA said.

In fact, we looked at the period since 1997 because that's when the previous warming trend stopped, and our graph ended in August 2012 because that is the last month for which Hadcrut 4 figures were available.

Those abrupt global warming events were almost always highly destructive for life, causing mass extinctions such as at the end of the Permian, Triassic, or even mid-Cambrian periods.

But, that is just because the start of the record occurred during the middle of a cooling period, and the end of the record occurred at the end of a warming period!

The reconstructions show the temperatures of the mid-Holocene warm period some 1 — 2 K above the reference level, the maximum of the MWP at or slightly below the reference level, the minimum of the LIA about 1 K below the reference level, and end - of - 20th century temperatures about 0.5 K above the reference level.

'' that there have been periods of warming and cooling in the 20th century, and that the net outcome has been a higher temperature at the end of the century than at the beginning; and (2), that it is not clear exactly how much that increase has been, because of measurement problems.»

The Neptune / Uranus factor is a lot weaker around the time of the Medieval Warm Period (Jupiter & Saturn not aligning) with very little disturbance (not unlike the overall weakening trend we are starting to experience now), but still I predict a weak solar grand minimum (see prediction at end of report).

Looking at all possible warming periods since the end of the nineteenth century we find that there are none that meet this requirement.

After the sudden rewarming at 11,550 years ago that ended the Younger Dryas, things gradually warmed into the period of modern sea level and agriculture.

Also, using the same cherry picking approach as used by «skeptics» for the recent time period, based on which they claim a «global warming stop» or «pause» because of lacking statistical significance of a warming trend, I even could claim a «pause» in global warming from 1979 to at least the end of 1997.

At the end of the Maunder Minimum, the Earth's atmosphere warmed more rapidly in response to the naturally - occurring recovery of solar activity from 1695 - 1735 than it has warmed in any subsequent 40 - year period.

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.

2) The dramatic warming over the period 1970 to 2000 and the fact that the starting level was not at the bottom of a dip and the ending level has been maintained until now.

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.

There was a «Medieval Warm Period», but different regions warmed at different times, and overall global surface temperatures were warmer at the end of the 20th century than during the MWP peak.

From the start, the «Modern» 5 - yr average rises much faster; but in an exceptional (dare we say «unprecedented») spurt, the «Earlier» period 5 - yr average closes the gap to a mere +0.03 degree warming difference at the end of 25 years.

By the end of September this year, 2011 - 15 was the world's warmest five - year period on record, at about 0.57 °C above the 1961 - 90 average.

CONCLUSIONS The frequently mentioned rapid increase of the temperature in the Arctic is based on a record beginning at a minimum in the temperature around the 1970s and ending during a period of relatively warm climate.

The inclusion of the very warm 1998 El Nino year at the end (or start) of either of those two periods only has a significant effect on the trend over the shorter period.

From the end of this period until 1998, a stretch of more than fifty years, there was no warming at all while carbon dioxide relentlessly increased.

At this time the earlier mentioned very warm period from 1934 - 1940 had defiantly ended.

We recorded an unusually warm period in early April 1979 along the coastline at the end of the Hall Peninsula on southeastern Baffin Island, Nunavut.

Kent points out that according to the Milankovitch theory, we should be at the peak of a 20,000 - some year warming trend that ended the last glacial period; the Earth may eventually start cooling again over thousands of years, and possibly head for another glaciation.

That's no warm period at all, and is contradicted by other physical data such as the freezing of the Thames during the LIA, and even at the end of it, but not during the MWP.

4) the end results on the bottom of the first table (on maximum temperatures), clearly showed a drop in the speed of warming that started around 38 years ago, and continued to drop every other period I looked / /... 5) I did a linear fit, on those 4 results for the drop in the speed of global maximum temps, versus time, ended up with y = 0.0018 x -0.0314, with r2 = 0.96 At that stage I was sure to know that I had hooked a fish: I was at least 95 % sure (max) temperatures were falling 6) On same maxima data, a polynomial fit, of 2nd order, i.e. parabolic, gave me y = -0.000049 × 2 + 0.004267 x — 0.056745 r2 = 0.995 That is very high, showing a natural relationship, like the trajectory of somebody throwing a ball... 7) projection on the above parabolic fit backward, (10 yearsAt that stage I was sure to know that I had hooked a fish: I was at least 95 % sure (max) temperatures were falling 6) On same maxima data, a polynomial fit, of 2nd order, i.e. parabolic, gave me y = -0.000049 × 2 + 0.004267 x — 0.056745 r2 = 0.995 That is very high, showing a natural relationship, like the trajectory of somebody throwing a ball... 7) projection on the above parabolic fit backward, (10 yearsat least 95 % sure (max) temperatures were falling 6) On same maxima data, a polynomial fit, of 2nd order, i.e. parabolic, gave me y = -0.000049 × 2 + 0.004267 x — 0.056745 r2 = 0.995 That is very high, showing a natural relationship, like the trajectory of somebody throwing a ball... 7) projection on the above parabolic fit backward, (10 years?)

the melting ice is due to the warmer gulfstream, which collected warmth from the warming period which ended at ca. 2000 Climate on Earth is ruled, among others, by the Gleissberg solar / weather cycle http://blogs.24.com/henryp/2012/10/02/best-sine-wave-fit-for-the-drop-in-global-maximum-temperatures/ Those still pointing to melting ice and glaciers, as «proof» that it is (still) warming, and not cooling, should remember that there is a lag from energy - in and energy - out due to oceans acting as energy reservoirs..

But «These models can not explain the high sea levels in the Pliocene period [from 5.3 million to 2.5 million years ago, which began warm and with high sea levels, but cooled towards the end], for example, where data point at a less stable Antarctic ice sheet than in the current models.»

A new study is shedding light on what that could mean for the future by providing the first direct physical evidence of a massive release of carbon from permafrost during a warming spike at the end of the last glacial period.

(We are at the end of an interglacial period the planet has cooled roughly 2C from the warmest period during this interglacial period.

Rhetorically speaking, was glacial melt and SLR from warming «equally measured» in 150 year increments from 20k years ago at the end of the LIA to 10k years ago when the last glacier receded from New York; or did the velocity of SLR increase over this period as factors, like the before mentioned, accelerated the velocity of melt through the period?

The best of the ice core records from Greenland (see www.WilliamCalvin.com/climate) show a sharp cooling at about 117,000 years ago, effectively ending the prior warm period, but it took a long time for the ice sheets to return.

My arithmetic for a 2x C02 would be: Present Warming: 0.75 deg C Current warming Rate 0.15 deg C per decade Time to 2x C02 (BAU scenario) approx 100 years So 0.15 x 10 +0.75 = 2.25 deg C Further warming due to time lag at end of 100 year period ~ 0.75 deg, probably over several dWarming: 0.75 deg C Current warming Rate 0.15 deg C per decade Time to 2x C02 (BAU scenario) approx 100 years So 0.15 x 10 +0.75 = 2.25 deg C Further warming due to time lag at end of 100 year period ~ 0.75 deg, probably over several dwarming Rate 0.15 deg C per decade Time to 2x C02 (BAU scenario) approx 100 years So 0.15 x 10 +0.75 = 2.25 deg C Further warming due to time lag at end of 100 year period ~ 0.75 deg, probably over several dwarming due to time lag at end of 100 year period ~ 0.75 deg, probably over several decades.

The decadal rate (2000's minus 1990's) is near 0.15 C per decade despite the flat plateau, which is due to a warm early 2000's period, and possibly the long solar minimum at the end.