Sentences with phrase «at least the last millennium»

But recent years have been the warmest humans have seen over at least the last millennium.

However, studies of paleoclimate proxies, such as tree rings and ice cores, have shown that oscillations similar to those observed instrumentally have been occurring for at least the last millennium.

«The current California drought is exceptionally severe in the context of at least the last millennium and is driven by reduced though not unprecedented precipitation and record high temperatures.»

Not exact matches

Nothing compares to the instananeous (in relation to geological time) release of vast quantities of CO2 and other GHGs into the atmosphere of the last 200 years, and the fact that the last 50 years have been the warmest for at least a millennium.

However, we needed at least one speaker who could explain in a rigorous but popular way the objective basis of the Church's teaching, constitution and ministry, and properly analyse its salvific effects on human culture over the last two millennia.

This sustained climate warming will drive the ocean's fishery yields into steep decline 200 years from now and that trend could last at least a millennium, according to University of California, Irvine, and Cornell University researchers in Science, March 9.

We therefore conclude based on genetic comparisons that Kennewick Man shows continuity with Native North Americans over at least the last eight millennia.

By W. Jackson Davis, Peter J. Taylor and W. Barton Davis Abstract We report a previously - unexplored natural temperature cycle recorded in ice cores from Antarctica — the Antarctic Centennial Oscillation (ACO)-- that has oscillated for at least the last 226 millennia.

In mid-20th Century, medieval temperatures are exceeded in all the reconstructions, hence recent (last 10 - 15 years, say) temperatures appear to be unprecedented for at least a millennium (that even holds for the alternative histories presented by the «hockey stick» critics).

Indeed, the last thirty years likely represent the warmest multidecadal period for Europe in at least the past half millennium [Luterbacher, J., Dietrich, D., Xoplaki, E., Grosjean, M. and H. Wanner, Science, 303, 1499 - 1503, 2004], while the last decade (1995 - 2004) is likely the warmest decade, and summer 2003 the warmest summer.

All of the studies we analysed reported at least three distinct climatic periods over the last millennium — two warm periods (the «Medieval Warm Period» and the «Current Warm Period») and an intervening cool period (the «Little Ice Age»).

The warming rate is at least 20 times larger than the previous Milankovitch cooling trend in this last millennium that ended with the LIA.

Anyway, today we try to explain the exact opposite: how northern hemisphere ice ages can quite suddenly weaken — at least in case of the last one, which had its cold peak around 18,000 years ago, after which atmospheric CO2 levels «suddenly» (over a millennium or so) rose by 30 per cent, and temperatures started to climb closer * to our current Holocene values.

It was confirmed that two long - term variations in solar activity — the cycles of Gleissberg and Suess — can be distinguished at least during the last millennium.

According to charcoal found at the surface or beneath the organic topsoil, 90 % of the surface of all the study sites burned at least one time recently or over the last millennia.

Evidence is presented in this statement that, at least in the Northern Hemisphere, the 20th century was most likely the warmest in the last millennium.

Responding to and in the manner of KK Tung's UPDATE (and, you can quote me): globally speaking the slowing of the rapidity of the warming, were it absent an enhanced hiatus compared to prior hiatuses, must at the least be interpreted as nothing more than a slowdown of the positive trend of uninterrupted global warming coming out of the Little Ice Age that has been «juiced» by AGW as evidenced by rapid warming during the last three decades of the 20th Century, irrespective of the fact that, «the modern Grand maximum (which occurred during solar cycles 19 — 23, i.e., 1950 - 2009),» according to Ilya Usoskin, «was a rare or even unique event, in both magnitude and duration, in the past three millennia [that's, 3,000 years].»

We find that there is at least one entirely plausible temperature reconstruction for the last millennium that shows comparable excursions.

At least as early as the beginning of the 20th century, different authors were already examining the evidence for climate changes during the last two millennia, particularly in relation to North America, Scandinavia and Eastern Europe (Brooks, 1922).

Specifically, the report noted that «the numerous indications that recent warmth is unprecedented for at least the last 400 years and potentially the last several millennia... supports the conclusion that human activities are responsible for much of the recent warming.»