Sentences with phrase «with glacial records»

Not exact matches

Previous ocean sediment records suggest that, as the world slipped into the last glacial period, less carbon overall reached the sediments of the Southern Ocean, coinciding with declining atmospheric carbon dioxide.

The MIS 5a palaeosol is overlain by massive sands, representing a major change in the depositional regime, which we interpret as evidence for climatic desiccation at the start of the last glacial period (MIS 4), which would be consistent with other dated records for the region [13], [16], [18], [30].

Episodic retreat is recorded by mega-scale glacial lineations that are overprinted by transverse grounding - zone wedges, each recording a pause in ice stream retreat with a stationary grounding line.

In particular, there are «slow» responses to the imbalance that are seen in the glacial record — CO2 and methane increase with a slow lag as temperature rises in response to the orbital changes, and the albedo effect that reduces incoming sunlight decreases as the ice melts, also with a slow lag.

Figure 2 shows our data together with earlier results from the Dome C (650 — 390 kyr bp4 and 22 — 0 kyr bp5), Vostok1, 2,3 (440 — 0 kyr bp) and Taylor Dome6 (60 — 20 kyr bp) ice cores resulting in a composite CO2 record over eight glacial cycles.

A simple ice budget calculation from ESL records demonstrates that the change in ice volume over Antarctica during the Late Glacial was at least comparable with the Scandinavian ice sheet, and quite possibly larger.

Reconstructed mass balance yielded accumulation and ablation each of ~ 3 km3 / yr, with glacial movement near the equilibrium line altitude dominated by basal sliding.Pollen and charcoal records from three lakes in northern Yellowstone provide information on the postglacial vegetation and fire history.

The Vostok record of atmospheric CO2 and Antarctic climate is consistent with a view of the climate system in which CO2 concentration changes amplify orbitally - induced climate changes on glacial / inter-glacial time - scales (Shackleton, 2000).

The most likely candidate for that climatic variable force that comes to mind is solar variability (because I can think of no other force that can change or reverse in a different trend often enough, and quick enough to account for the historical climatic record) and the primary and secondary effects associated with this solar variability which I feel are a significant player in glacial / inter-glacial cycles, counter climatic trends when taken into consideration with these factors which are, land / ocean arrangements, mean land elevation, mean magnetic field strength of the earth (magnetic excursions), the mean state of the climate (average global temperature), the initial state of the earth's climate (how close to interglacial - glacial threshold condition it is) the state of random terrestrial (violent volcanic eruption, or a random atmospheric circulation / oceanic pattern that feeds upon itself possibly) / extra terrestrial events (super-nova in vicinity of earth or a random impact) along with Milankovitch Cycles.

Quoting from a paper that was accepted: «Many palaeoclimate records from the North Atlantic region show a pattern of rapid climate oscillations, the so - called Dansgaard — Oeschger events, with a quasi-periodicity of ∼ 1,470 years for the late glacial period» http://www.nature.com/articles/nature04121

But the Greenland ice sheet temperature record shows a similar trend over the glacial - interglacial transition, be it with much larger swings, as that mainly reflects the North Atlantic seawater temperature: http://www.climatedata.info/Proxy/Proxy/icecores.html That means that the CO2 - temperature ratio is probably less than 15 ppmv / °C.

Using climate records culled from tree rings, glacial - ice layers and coral - growth layers, the three professors — whose research was funded in part by the federal government — determined in 1998 that temperatures have skyrocketed in the past century compared with the 500 years preceding it.

We will present a carbon dioxide record from 40 - 35 and 28 - 9 ka from the last glacial and deglacial periods from a new ice core from West Antarctica with an average sampling resolution of 25 - 50 yrs.

Our record shows that CO2 variations during the glacial period have a clear relationship with abrupt climate changes in the Northern Hemisphere that continues into the deglacial period.

Is the temperature chronology of the ice cores and global proxies consistent with the well - dated, global glacial record?

Leaving lag effects observed in the glacial — interglacial records aside, explain how using GISP2 data we have a ~ 7 - 9000 year cooling trend with a 3 C drop, while using Epic CO2 data CO2 was increasing from 260 - 280?

Such as another fascinating paper by Don J. Easterbrook, Professor Emeritus in the Deptment of Geology at Western Washington University: «Solar Influence on Recurring Global, Decadal, Climate Cycles Recorded by Glacial Fluctuations, Ice Cores, Sea Surface Temperatures, and Historic Measurements Over the Past Millennium» — Hat tip to Anthony Watt's Watts Up with That.