Sentences with phrase «data about ice age»

Nowadays, a common check is to see how the models check with historical records: ice core samples have given us enough data about the ice ages to be able to run the models in «ice age mode» — and they seem to agree very well with the data.

Not exact matches

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

Marcott's data indicates that it took 4,000 years for the world to warm about 1.25 degrees from the end of the ice age to about 7,000 years ago.

«To summarize - Using the 60 and 1000 year quasi repetitive patterns in conjunction with the solar data leads straightforwardly to the following reasonable predictions for Global SSTs 1 Continued modest cooling until a more significant temperature drop at about 2016 - 17 2 Possible unusual cold snap 2021 - 22 3 Built in cooling trend until at least 2024 4 Temperature Hadsst3 moving average anomaly 2035 — 0.15 5Temperature Hadsst3 moving average anomaly 2100 — 0.5 6 General Conclusion — by 2100 all the 20th century temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the little ice age.

My other point to him at the time was that the Industrial Revolution was actually quite limited and that it wasn't until the forties last century that industry spread, but he ignored this as he ignored the email about getting rid of the MWP and LIA and when I found the Vostok data, and began to appreciate the great cycles within our Ice Age, he dismissed these too and came back to the claim that our temps had been «flat normal» and our fault that we were changing this by our increased production of carbon dioxide as the Hockey Stick showed.

(6) Ice core data provide evidence of a quasi millennial oscillation with alternating warm and cool periods: ● Minoan Warm Period about 3 k - years ago ● Roman Warm Period about 2 k - years ago ● Dark (cool) Age about 1.5 k - year ago ● Medieval Warm Period from about early 10th to late 14th century ● Little Ice Age from about late 14th to mid 19th century.

The AMO during the Little Ice Age was characterized by a quasi-periodicity of about 20 years, while the during the Medieval Warm Period the AMO oscillated with a period of about 45 to 65 years... The observed intermittency of these modes over the last 4000 years supports the view that these are internal ocean - atmosphere modes, with little or no external forcing... However, the geographic variability of these periodicities indicated by ice core data is not captured in model simulations.&raqIce Age was characterized by a quasi-periodicity of about 20 years, while the during the Medieval Warm Period the AMO oscillated with a period of about 45 to 65 years... The observed intermittency of these modes over the last 4000 years supports the view that these are internal ocean - atmosphere modes, with little or no external forcing... However, the geographic variability of these periodicities indicated by ice core data is not captured in model simulations.&raqice core data is not captured in model simulations.»

Although the I.P.C.C. allowed for the possibility that variations in sunlight could have ended the «Little Ice Age,» a period of cooling from the 14th century to about 1850, our data argues strongly that the temperature rise of the past 250 years can not be attributed to solar changes.

«To summarize — Using the 60 and 1000 year quasi repetitive patterns in conjunction with the solar data leads straightforwardly to the following reasonable predictions for Global SSTs 1 Continued modest cooling until a more significant temperature drop at about 2016 - 17 2 Possible unusual cold snap 2021 - 22 3 Built in cooling trend until at least 2024 4 Temperature Hadsst3 moving average anomaly 2035 minus 0.15 degrees 5Temperature Hadsst3 moving average anomaly 2100 minus 0.5 degrees 6 General Conclusion — by 2100 all the 20th century temperature rise will have been reversed, 7 By 2650 earth could possibly be back to the depths of the little ice age.

have been made to test this range against paleo - data for the ice age and Cretaceous, yielding approximately the same range with a «best guess» sensitivity of about 2.0 - 3.0 ° C.