Sentences with phrase «glacial maximum»

At the last glacial maximum when CO2 and precipitation was much lower, the number of trees would have only been 5 % to 10 % of these numbers.

I also agree that its hard to understand how people can claim to derive accurate sensitivity estimates for the last glacial maximum for example, given the large uncertainties.

Black carbon concentrations and fluxes since the Last Glacial Maximum in Greenland and Antarctic ice cores.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

However, going back several centuries and reconstructing the entire process of glacier shrinkage from the «little ice age» — the last glacial maximum occurred in this part of the Andes between the 17th and 18th centuries — Andean glaciers began to retreat around AD1730 - 50.

Connections to land - based systems Hydrologists think these submarine groundwater reserves started to form tens of thousands of years ago, during periods like the Last Glacial Maximum when much of the Earth's water was bound up in ice and sea levels were especially low.

Distinguishing subglacial till and glacial marine diamictons in the western Ross Sea, Antarctica: Implications for last glacial maximum grounding line.

Based on previous studies it was assumed that the entire region was much drier during the Last Glacial Maximum compared to present conditions, «Niedermeyer concludes.

Such piracy was rampant as the colossal ice sheets of the Last Glacial Maximum began shrinking around 18,000 years ago.

«Although this period is around the late glacial maximum, there is a blip at 23,000 years during which time it was milder.»

The Last Glacial Maximum climate (approximately 21 ka) relative to the pre-industrial (1750) climate.

Climate model simulations of the Last Glacial Maximum show an even stronger Bodélé LLJ compared with that of the present, and dated evidence points to the conditions under which deflation would have been capable of excavating the depression which was later partly filled by paleolake Megachad (31).

Displacement data indicate that the Leech River fault has experienced at least two surface - rupturing earthquakes since deglaciation following the last glacial maximum ca. 15 ka.

Due to local effects of temperature and precipitation, the local glacial maximum occurred considerably earlier, around 26,000 years ago.

As elsewhere on the planet, tropical glaciers (located on either side of the equator between 23 ° N and 23 ° S) have been retreating since the Last Glacial Maximum around 20,000 years ago.

The discovery that the oldest pots in the world were made in China around the time of the Last Glacial Maximum suggests that might be the case.

This date is consistent, however, with the expansion of O. rufipogon populations after the Last Glacial Maximum ∼ 18 ka and archeological evidence for early wild rice management in China.

During the late Pleistocene glacial maxima, about two - thirds of the present Alaskan land mass was ice free (Hamilton and Goebel 1999:156).

New paleoclimatic research focusing on reconstructed temperature - CO2 relations during the Last Glacial Maximum leads to climate model runs indicating an about 23 percent lower climate sensitivity, with a median sensitivity value of 2.3 degrees Celsius (and a 66 percent range of 1.7 - 2.6 degrees — so an especially smaller maximum response).

However, most previous paleoclimate reconstructions of Southern Ocean sea ice have focused on the Last Glacial Maximum timeslice (CLIMAP, MARGO projects) or the Holocene and last interglacial periods (PAGES working group Sea Ice Proxies (SIP)-RRB-.

It hardly needs elaboration that the regulation of tropical sea surface temperature is a central problem in climate, with repercussions ranging from the paleoclimatic domain (e.g. climate of the last glacial maximum vs. the warm climates of the Eocene) through the El Niño fluctuations of the present climate, and beyond to projections of climatic impact of anthropogenic CO2 increase.

For an understanding of the historical context of sea level rise since the last glacial maximum see these SkS posts:

Counter-intuitively during the last Glacial Maximum ice accumulation dropped to a minimum.

As noted above they had a 3.5 degree Celsius warming since the last glacial maximum approximately 20 - 21,000 years ago.

Can the Last Glacial Maximum constrain climate sensitivity?

So, my approach was to bin the outputs of the PMIP2 simulations for the Last Glacial Maximum onto a 10x10 degree grid, correlate these local temperature anomalies with the models» climate sensitivties and hope to see a nice big correlation in the tropics where the dominant forcing for the LGM is due to GHG changes.