Sentences with phrase «climate fluctuation during»

I have no doubt that there has been centennial climate fluctuation during the Quaternary, and this includes the Holocene.

Here we show that fluctuations in Antarctic Ice Sheet discharge caused by relatively small changes in subsurface ocean temperature can amplify multi-centennial climate variability regionally and globally, suggesting that a dynamic Antarctic Ice Sheet may have driven climate fluctuations during the Holocene.

Not exact matches

«We can see that the climate during an ice age has much greater fluctuations than the climate during an interglacial period.

During what are called Heinrich events — natural but still largely unexplained fluctuations in the global climate — the Atlantic Ocean's circulation slows substantially.

Geological evidence pointed to the springs being active during the driest periods of climate fluctuations that occurred around 1.8 million years ago, a critical period for hominin evolution.

New research shows that small fluctuations in the sizes of ice sheets during the last ice age were enough to trigger abrupt climate change.

During the past decade, the global temperature may have «paused,» most likely due to natural climate fluctuations, the panel finds.

Villalba (1990) «Climate Fluctuations in Northern Patagonia During the Last 1000 Years Inferred From Tree Ring Records» Quaternary Research 34, 346 - 360.

Eastern Andean Patagonia (40º - 51ºS) vegetation and climate variability during the Holocene related tosouthern westerlies fluctuations Gonzalo Sottile, M. Alejandra Marcos, Florencia Bamonte, Marcos Echeverría, M. Eugenia de Porras, MarcelaTonello, M. Virginia Mancini, M. Martha Bianchi

Similar fluctuations in OMZ intensity have occurred during the Dansgaard - Oeschger (D - O) events (millennial - scale abrupt climate oscillations) during the last glacial period (Cannariato and Kennett, 1999; Schmittner et al., 2007).

For the most part, I've not seen much evidence to suggest that internal variations alone can bring the climate to a new state on decadal timescales, even if the internal fluctuations do not completely average out over decades (e.g.,, the PDO being in a positive phase more than a negative phase during the timescale of consideration).

Through its actions, NCAR seems to be stating that physical science alone holds the key to coping with climate change, or even working to improve our resilience during typical seasonal fluctuations and weather events.

8 Natural Processes that Change Climate CO2 Fluctuations Changes in plant growth rates CO2 levels fall during the growing season and rise in the winter

In conclusion, our analysis suggests that strong interannual and decadal variations observed in the average land surface temperature records represent a true climate phenomenon, not only during the years when fluctuations on the timescale of 2 - 15 years had been previously identified with El Nino events.

Dansgaard — Oeschger events (often abbreviated D — O events) are rapid climate fluctuations that occurred 25 times during the last glacial period.

Note that I am not necessarily claiming that this is the feedback operating on the long time scales associated with global warming — only that it is the average feedback involved in the climate fluctuations occurring during the period when the satellite was making its measurements.

My own reading of the evidence is that much of the fluctuation during that interval was due to natural unforced variability from internal climate dynamics, with aerosols perhaps adding some cooling after 1950 but not necessarily a major player before 1950 nor necessarily an exclusive player from 1950 to the mid 1950s.

«Epistemology is here applied to problems of statistical inference during testing, the relationship between the underlying physics and the models, the epistemic meaning of ensemble statistics, problems of spatial and temporal scale, the existence or not of an unforced null for climate fluctuations, the meaning of existing uncertainty estimates, and other issues.

Since such models can not account for the climate system's apparent sensitivity to small perturbations in solar energy apparently brought about by the very long term changes in the Earth's orbit about the Sun, they may also underestimate climate sensitivity to energy output fluctuations caused by solar activity, even during the eleven - year Schwabe cycle.

The claim in recent papers is that the climate in Greenland during the Holocene appears highly sensitive to variations in environmental factors, which I find not too surprising, because that is what you see in these back and forth noisy fluctuations.

(1) to acknowledge that the AR4 conclusions are not exclusively model - based, and (2) to identify to the extent feasible major fluctuations that might compete with GHGs rather than refer to them abstractly as climate variability, so that readers can assess for themselves how important they believe these sources of variation might have been during the particular interval cited by AR4, and whether it is necessary to invoke unidentified variables to make natural variation a potent competitor to anthropogenic forcings.

If you want to incorporate any of this in your revision, the two points I would most recommend are (1) to acknowledge that the AR4 conclusions are not exclusively model - based, and (2) to identify to the extent feasible major fluctuations that might compete with GHGs rather than refer to them abstractly as climate variability, so that readers can assess for themselves how important they believe these sources of variation might have been during the particular interval cited by AR4, and whether it is necessary to invoke unidentified variables to make natural variation a potent competitor to anthropogenic forcings.

Pepijn Bakker and colleagues combine observational records of iceberg - rafted debris with climate models to show that the climate fluctuations seen during the Holocene may have been driven by small variations in the discharge of freshwater from the Antarctic Ice Sheet, amplified through the climate system.