Sentences with phrase «centennial scale»
The phrase "centennial scale" refers to something that occurs or is measured over a period of one hundred years. Full definition
It's quite difficult to judge on Wikipedia plot, but Esper and Moberg reconstructions seem to have the same trends at centennial scale (even if Esper's one have globally more amplitude than all others).
realclimate.org
Mackas and Dunne and I noted the significant bias between the Secchi disk method and in situ fluorometry which, when combined with a shift from one sampling technique to the other during the 1900s, induced a spurious centennial scale trend in the data.
Do these studies confirm that natural warming trends have occurred, not exactly, but they do provide evidence which supports stronger centennial scale variability than is readily accepted.
Spectrum frequency analyses over the past 12,000 years show centennial scale events on four different Antarctic temperature proxy records at 193, 318, 379 and 493 years.
This study concluded the sample resolution of the Vostok ice core data can detect centennial scale cycles.
Likewise, a statistician will not automatically be aware of the difference between proxies of low resolution (which may be good at estimating average temperature on a decadal or even centennial scale) and proxies of high resolution that are good at estimating temperature at a yearly level.
In spite of these large low frequency uncertainties, at centennial scales, they are still only about 13 % of the IPCC estimated anthropogenic increase (with 90 % certainty).
Orbital factors can initiate, but the insolation rate of change due to orbital factors would not drive the detailed processes at a centennial scale (Dansgaard Oeschger etc).
Davis speculates these cycles are the result of oceanic oscillations which frequently operate on a centennial scale bases.
Concerning your question about the confidence I have in Boyce et al.'s original conclusions: I have no confidence that the analysis demonstrated a global, long - term decline in chlorophyll over the centennial scale.
But temperatures did not fluctuate uniformly among all regions at multi-decadal to centennial scales.
WHOI published on the centennial scale Pacific Oscillation which is also blissfully ignore and Toggwieler and Briereley have published on the impact of shifting westerlies and zonal / meridional temperature gradients also blissfully ignored.
A new study using a high - resolution stalagmite record from Australia with cave sites in southern China reveal a close coupling of monsoon rainfall on both continents, with numerous synchronous pluvial and drought periods, suggesting that the tropical rain belt expanded and contracted numerous times at multidecadal to centennial scales.
The confidence affirmed to it by many on our side of the debate was vastly overstated and as has been shown in the recent literature greater variability on the centennial scale exists than was shown.
A solar connection suggests the potential for a shift to a yet cooler state in the Pacific on a centennial scale.
-LSB-...] Altitude Inhomogeneity It is evident that there have been substantial changes in treeline elevation on a centennial scale, presumably responding to temperature changes.
I know of no mechanism by which such spikes would occur without also affecting the centennial scale.
Their analysis revealed a close coupling of monsoon rainfall on both continents, with numerous synchronous pluvial and drought periods, suggesting that the tropical rain belt expanded and contracted numerous times at multidecadal to centennial scales.