Sentences with phrase «low during the last ice age»

It is now clear that just the opposite is the case since global CO2 was dangerously low during the last ice age.

Foraminifera - bound δ15N is up to 2 ‰ lower during the last ice age than during the Holocene, suggesting as much as ~ 25 % less complete nitrate consumption during the former.

Not exact matches

And to put that in context during the last ice age, we were at a 180, so we were 100 ppm lower than in the preindustrial state.

During the last ice age, lowered sea level drained the Bering Strait, the narrow seaway now separating Alaska and Asia.

It was formed as a limestone cave system during the last ice age when sea levels were much lower.

The limestone walls of the hole were formed during the last Ice Age when water levels in the area were much lower.

During the last ice age, 10 - 20,000 years ago, ocean levels were up to 400 feet lower than today's.

As during the last ice age when sea levels were around 100 m lower icebergs were grounding at 44s, these would have calved from similar size as during the 2001 event (160kmx30km) hardly evidence of change.

Sea - ice age estimates in spring, showing conditions during the last week of April in 2009 (upper image) and 2010 (lower image).

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»

The MDB average rainfall during the last three decades has been recording a 10 % loss per decade, I believe this is primarily due to declining solar radiation levels, moving from the highest for 8000 years to presently the lowest for 100 years, this solar decline is expected to continue for at least another 3 decades, maybe 6 decades like it did in the 16th century, brining on the last little ice age.

In recent years researchers have been lowering their estimates of mass gained during the last Ice Age and lost ice mass during the recent deglaciatiIce Age and lost ice mass during the recent deglaciatiice mass during the recent deglaciation.

The mechanisms that lowered surface pH to 8.3 - 8.4 during the Last Ice Age is a matter of considerable debate, but clearly more carbon was being sequestered at depth and less carbon was being pumped to the surface.

Wenk Physics Institute, University of Bern, CH — 3012 Bern, Sidlerstrasse 5, Switzerland Studies on air trapped in old polar ice1, 2 have shown that during the last ice age, the atmospheric carbon dioxide concentration was probably significantly lower than during the Holocene — about 200 p.p.m. rather than 270 p.p.m.. Also, Stauffer et al. 3 recently showed by detailed analyses of Greenland ice cores, that during the ice age, between about 30,000 and 40,000 yr BP, the atmospheric CO2 level probably varied between 200 and 260 p.p.m..

When the last ice age ended, the oceans were very close to 120 m (nearly 400 feet) LOWER than today (NASA's own website) As for runaway GHG induced heat, at the hight of our present right now, sea levels are STILL 4 - 6 meters LOWER than they wrre during the previous interglacial.

CO2 levels during the last Ice Age were so low that many plants were in danger of dying for lack of one of their basic nutrients, CO2.

Low levels of it came close to finishing off plants and indirectly animals during the last Ice Age.

Pederson, D.C., D.M. Peteet, D. Kurdyla, and T. Guilderson, 2005: Medieval Warming, Little Ice Age, and European impact on the environment during the last millennium in the lower Hudson Valley, New York, USA.