Sentences with phrase «paleoclimate record»

We then examine climate impacts during the past few decades of global warming and in paleoclimate records including the Eemian period, concluding that there are already clear indications of undesirable impacts at the current level of warming and that 2 °C warming would have major deleterious consequences.

Verdon, D. C., Franks, S. W., 2006, Long - term behaviour of ENSO: Interactions with the PDO over the past 400 years inferred from paleoclimate records, Geophysical Research Letters, Volume 33, Issue 6, March 2006, DOI: 10.1029 / 2005GL025052

Indeed, it is slow feedbacks that cause long - term climate sensitivity to be high in the empirical paleoclimate record [51]--[52].

As we will show, Earth's paleoclimate record makes it clear that the CO2 produced by burning all or most of these fossil fuels would lead to a very different planet than the one that humanity knows.

The former head of geosciences at the National Science Foundation, she says the 1 - gigaton - a-year figure for atmospheric CO2 was based on paleoclimate records.

These and other paleoclimate records indicate that rain belts shifted northward along with the thermal equator because of the global heat imbalance.

By comparing the pollen records at different elevations with paleoclimate records, Crausbay has concluded that El Niño - driven droughts determine the upper limits of the forest.

We then examine climate impacts during the past few decades of global warming and in paleoclimate records including the Eemian period, concluding that there are already clear indications of undesirable impacts at the current level of warming and that 2 °C warming would have major deleterious consequences.

However, numerous paleoclimate records also suggest that the region has experienced multidecadal periods in which most years were in a drought state (14, 39, 41, 42), albeit less acute than the current California event (12, 39, 41).

But a recent study published in Nature uses paleoclimate records from the 1500s to show that industrial - era warming first became apparent in the Northern Hemisphere in the mid-1800s.

More precisely, we ask whether the impact of human activities on the climate is observable and identifiable in the instrumental records of the last century - and - a-half and in recent paleoclimate records?

«This will evolve,» Putnam said, as more paleoclimate records emerge and are paired with climate models to «try to see if climate models can reproduce the patterns that we see in those datasets.»

Aaron Putnam, a paleoclimatologist at the University of Maine, and Wally Broecker, a Columbia University climate scientist, looked for clues as to whether such shifts have happened before in various paleoclimate records, including the shorelines of ancient lakes and cave stalagmites.

This includes the aforementioned paleoclimate records, as well as the early emergence of a severe condition in pregnant women known as preeclampsia.

The YTT isochron provides an accurate and precise age estimate for the Lake Malawi paleoclimate record, which revises the chronology of past climatic events in East Africa.

Our approach is a significant advance on previous models, as we incorporate the lake index as a proxy for local climate, together with regional and global paleoclimate records.

Regional aeolian terrigenous dust records from off the coast of West Africa (ODP 659), Arabian Sea (ODP 721/722) and Mediterranean (ODP 967) and global stacked benthic foraminifera δ18O paleoclimate records were collated from published sources (see File S1).

Human evolution is characterised by speciation, extinction and dispersal events that can not currently be explained by global or regional paleoclimate records [1]--[3].

Early human evolution is characterised by pulsed speciation and dispersal events that can not be explained fully by global or continental paleoclimate records.

«Therefore, our analysis of multicentury hydroclimate variability suggests that projections of tropical rainfall patterns, and global temperature extremes, will remain uncertain until paleoclimate records and models consistently capture the lower - frequency variability, and associated feedbacks, in the tropical Pacific.»

But GISP2 doesn't take into account the full paleoclimate record, so I find it highly suspect that you are not inquisitive enough to get a full read on what is available in current literature.

Anchukaitis, K. J., and J. E. Tierney (2013), Identifying coherent spatiotemporal modes in time - uncertain proxy paleoclimate records, Clim.

Scientific Discipline Cryosphere Speaker Eric Rignot (NASA Jet Propulsion Laboratory) Abstract Modern views of ice sheets provided by satellites, airborne surveys, in situ data and paleoclimate records while transformative of glaciology have not fundamentally changed concerns about ice sheet stability and collapse that emerged in the 1970's.

The idea of de-emphasizing a certain paleoclimate record (Briffa's) which does not reproduce the modern warming (unlike most others) was consequently misattributed to him.

Paleoclimate records show that the Arctic has had SSTs in the 27 C range, but that will likely occur after the Arctic is perennially ice free.

As we will show, Earth's paleoclimate record makes it clear that the CO2 produced by burning all or most of these fossil fuels would lead to a very different planet than the one that humanity knows.

we ask whether the impact of human activities on the climate is observable and identifiable in the instrumental records of the last century - and - a-half and in recent paleoclimate records?

In contrast, chemistry modeling and paleoclimate records [222] show that trace gases increase with global warming, making it unlikely that overall atmospheric CH4 will decrease even if a decrease is achieved in anthropogenic CH4 sources.

Eelco Rohling, an ocean and climate scientist at the University of Southampton in England, has studied the paleoclimate record going back 50 million years.

So if you could then bring all these together — parts per millions, the global forcing and sea - level rise — based on the paleoclimate record, which is, kind of, the really more a recent data that the new view is built on.

«Most of the paleoclimate records from this region are plant - based, and track only the warm part of the year — the growing season,» says Candace Major, program director in NSF's Directorate for Geosciences, which funded the research.

To answer your question, the graph shows the three astronomical cycles which affect paleoclimate, the most commonly proposed forcing calculation, and a paleoclimate record for the last million years.

When Michael Mann and the IPCC coordinated efforts to make the Medieval Warm Period disappear from the paleoclimate record in the early 2000s, they employed the visually slick and effective tactic of adding red to the «dangerous» warming trend, and blue to the «safe» cooling trend.

One issue that I have wondered about for some time is to what extent the paleoclimate record supports the distinction between slow - feedback and fast - feedback climate sensitivity.