Sentences with phrase «centennial temperature»

Roger — The centennial Temperature Trend is associated with positive forcings from about 1910 through the 1940's, and from about 1978 to the present.

Paleoclimate characteristics and trends provide the overarching framework and climate history to better understand centennial temperature fluctuations and potential future global temperature tipping points.

Not exact matches

While centennial increases in ocean surface temperatures have been extensively reported35, 36, global trends in ocean temperature extremes remain largely unexplored.

An enhanced variability of temperature during the last millenium suggested by the work of Esper, Moberg, etc. is mainly related to the time frame 1000 — 1900 and the centennial time - scale.

Suppose also that — DESPITE THIS STABILIZING MECHANISM some as - yet unknown ocean circulation cycle operates that is the sole cause of the Holocene centennial scale fluctuations, and that this cycle has reversed and is operating today, yielding a temperature change that happens to mimic what models give in response to radiative forcing changes.

Currently, instrumental and satellite temperature data exhibit rates of 0.5 to 1.8 degrees per century that are well within the assemblage of natural centennial events.

My interpretation of this is that you are saying that if we want to get an understanding of temperature trends on centennial or millenial timescales, we should wilfully ignore the higher - precision instrumental record in favour of the lower - precision proxies.

Suppose also that — DESPITE THIS STABILIZING MECHANISM some as - yet unknown ocean circulation cycle operates that is the sole cause of the Holocene centennial scale fluctuations, and that this cycle has reversed and is operating today, yielding a temperature change that happens to mimic what models give in response to radiative forcing changes.

[Response: Despite the evidence for rapid regional climate changes during certain past transitional periods (e.g. the Younger Dryas), there is no evidence that global mean temperature changes of the amplitude seen in the past century have occured on centennial or shorter timescales in the past.

An enhanced variability of temperature during the last millenium suggested by the work of Esper, Moberg, etc. is mainly related to the time frame 1000 — 1900 and the centennial time - scale.

Muir L., and A. V. Fedorov, 2014: How the AMOC affects ocean temperatures on decadal to centennial timescales: the North Atlantic versus an interhemispheric seesaw.

-- Lyu et al., 2016 Within the last 1,000 years, global - scale surface temperatures underwent a warm period during Medieval times, centennial - scale cooling during the 14th to 19th centuries, and another warm period since the early 20th century.

The ice margin near Jakobshavn thus underwent large and rapid adjustments in response to relatively modest centennial - scale Holocene temperature changes, which may foreshadow GIS response to future warming.

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.

The resolution of that plotting makes it impossible to determine whether there were any centennial (or less) temperature swings during periods such as the Minoan, Roman or Mediaeval warm periods.

At multi-decadal to centennial scales, temperature variability shows distinctly different regional patterns, with more similarity within each hemisphere than between them.

Also notice that far more conspicuous rises and falls in temperatures in decadal and centennial scale occurred during the Holocene than now.

'' where is the evidence that the warming since the LIA is not wholly or mainly natural, given that the earth's temperature is well within its centennial behaviour?»

At shorter, multidecadal / centennial timescales global temperature seems to variate (~ 1 - 2 °C) without ceasing.

It is further noted that GM strength has good relational coherence with the temperature difference between the Northern and Southern Hemispheres, and that on centennial time scales the GM strength responds more directly to the effective solar forcing than the concurrent forced response in global - mean surface temperature.

Unfortunately temperature records are not old enough (160 years maximum) to provide larger scale (centennial especially) patterns, that could tell us when this overall warming would end.

«Temperatures did not fluctuate uniformly among all regions, highlighting the regionally specific evolution of temperature at multidecadal to centennial time scales (Fig. 2).

... this is a process on decadal and centennial timescale... < > temperatures increased for 300 years since the LIA (17.

What is profound is showing — if it proves to be the case — that natural cycles with very modest parameters (the cycles shown in the link have amplitudes that could be explained by known variation in TSI), when subjected to random shocks of an order demonstrated in nature, can produce centennial (or longer) changes in global temperature on the order actually observed.

The small pre-industrial greenhouse gas variations also provide indirect evidence for a limited range of decadal - to centennial - scale variations in global temperature

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.

Then they go on to try to remedy the resolution shortfall statistically: «Because the relatively low resolution and time uncertainty of our data sets should generally suppress higher - frequency temperature variability, an important question is whether the Holocene stack adequately represents centennial - or millennialscale variability.»

Can long - term cycles in ocean temperature such as the Pacific Decadal Oscillation explain the centennial trend?

Models are able to reproduce many features of the observed global and Northern Hemispher (NH) mean temperature variance on interannual to centennial time scales (high confidence), and most models are now able to reproduce the observed peak in variability associated with the El Niño (2 - to 7 - year period) in the Tropical Pacific.

Panel c shows the difference on multi-decadal (dark grey) and centennial (light grey) timescales between the two reconstructions (expressed as an in - between fill of the curves), with the «multi-proxy» reconstruction showing on average 0.2 °C lower temperature estimates

Despite relatively little centennial variability, Briffa's reconstruction had a noticeable decline in the late 20th century, despite warmer temperatures.