Sentences with phrase «multidecadal rises»

Since Global SST anomalies respond to changes in NINO3.4 SST anomalies, this relationship implies that the strengths and frequencies of El Niño and La Niña events over multidecadal periods cause the multidecadal rises and falls in global sea surface temperatures.

The PDO, therefore, can not be the cause of the multidecadal rises and falls in global SST anomalies.

University of Montana Professor John Kimball is among the team of researchers who published an article on Oct. 30 about their study on Nature magazine's website titled «Vegetation Greening and Climate Change Promote Multidecadal Rises of Global Land Evapotranspiration.»

Not exact matches

We show that a multidecadal increase in flower activity is most strongly associated with rising atmospheric CO2 concentrations using yearly aggregated data.

Regards rates of sea level rise the IPCC graph (https://goo.gl/C9NoQR) shows multidecadal rates of change.

A total rise of 0.4 degrees C over two multidecadal regimes from 1944 to 1998.

Specifically, the claim was made that temperatures in Churchill, Manitoba (close to the center of the Western Hudson Bay population of bears) had not risen, and that instead, any multidecadal variations in temperatures affecting the bears were related to the Arctic Oscillation (AO), a mode of natural variability.

Because filter F3 rises slowly on the left of its cutoff there is the worry that some multidecadal phenomenon was overlooked by sneaking into the Hale octave.

e.g. there is 1) a mild global cooling from the Holocene Climatic Optimum 2) A millenial scale oscillation of ~ 1500 years per Loehle & Singer above (i.e. an approximately linear rise from the Little Ice Age — or better an accelerating natural warming since the LIA) 3) A 50 - 60 year multidecadal oscillation.

Because even if we'd never heard of CO2 we'd still have this separation of multidecadal climate between Figures 1 and 2 into an oscillating component and a rising component, whose upward - curvature has continually been getting steeper and shows no sign of abruptly turning into a downward curvature.

The Atlantic multidecadal oscillation (AMO), a 60 - to -80-year natural cycle in sea surface temperature, explained less than 0.1 degrees Celsius [0.2 degrees Fahrenheit] of the rise, according to Trenberth.

Regionally, climate models underestimate the amount of sea level rise that occured, but do show reasonable agreement for interannual and multidecadal variability.

CLOSING This post presented graphs and animations that showed Global SST anomalies rose and fell over the past 100 years in response to the dominant ENSO phase; that is, Global SST anomalies rose over multidecadal periods when and because El Niño events prevailed and they fell over multidecadal periods when and because La Niña events dominated.

Longer Title: Do Multidecadal Changes In The Strength And Frequency Of El Niño and La Niña Events Cause Global Sea Surface Temperature Anomalies To Rise And Fall Over Multidecadal Periods?

Again for example, during multidecadal periods when El Niño events dominate, the tropical North Atlantic trade winds would be on average weaker than «normal», there would be less evaporation, less cool subsurface waters would be drawn to the surface, and tropical North Atlantic sea surface temperatures would rise.

Someone is bound to ask, how could the global Sea Surface Temperatures rise over multidecadal periods without an increase in radiative forcing?

The author asks, «Someone is bound to ask, how could the global Sea Surface Temperatures rise over multidecadal periods without an increase in radiative forcing?»

The latter, of course, is characterized by many short term peaks, dips, and flat intervals, with recent years unexceptional in this regard, but the critical issue is the extent to which multidecadal influences are competing to explain the rise during this time period.

During this period, the rate of this rise has varied on multidecadal time scales making identifying exact reasons behind upswings, such has been observed over the past few decades, difficult.

The North Atlantic (not illustrated) also governed by the Atlantic Multidecadal Oscillation, which had caused the North Atlantic SST anomalies to rise at a rate more than 2 times faster than the global SST anomalies... until ~ 2005.

AGW rises sufficiently slowly that only the multidecadal fluctuations are able to mask it.

5) Akasofu and others touting the multidecadal ocean oscillations theory already claim a 0.5 °C / century rise from the Little Ice Age, since the mid-to-late 17th century, while the modelling in this article shows only about 0.2 °C / century for that effect, so it seems they are underestimating it substantially, and simply giving its contribution to AGW.

Between them, the phenomena known to meteorologists as the Atlantic Multidecadal Oscillation and the Pacific Decadal Oscillation could account for the seeming slowdown in predicted temperature rises.

In addition, multidecadal measurements of steric sea level rise (a rise due to thermal expansion of sea water), and of ocean heat content have also been consistent with the temperature trends.

Although the secular trend is mild (~ 0.25 K / century), there is nearly double that trend in the January data, which is poorly correlated with the yearly averages (R ^ 2 = 0.27) and shows persistently rising bottoms of multidecadal cycles since the latter half of the 18th century.

Last week I asked Bob Tisdale to take a hard look at potential correlations between the AMO and Arctic sea ice extent, and he rose to the challenge — Anthony Guest post by Bob Tisdale This post presents reference graphs and a discussion of the effects of the Atlantic Multidecadal Oscillation on Arctic sea ice...

Although the calculations of 18 - year rates of GMSL rise based on the different reconstruction methods disagree by as much as 2 mm mm yr - 1 before 1950 and on details of the variability (Figure 3.14), all do indicate 18 - year trends that were significantly higher than the 20th century average at certain times (1920 — 1950, 1990 — present) and lower at other periods (1910 — 1920, 1955 — 1980), likely related to multidecadal variability.The IPCC AR5 found that it is likely that a sea level rise rate comparable to that since 1993 occurred between 1920 and 1950.

Wu et al. (7, 8) pointed out the importance of this mode in the modern global temperature record with a period of 65 y: If it is interpreted as natural and related to the Atlantic Multidecadal Oscillation (AMO)(9 ⇓ ⇓ — 12), then the trend attributed to anthropogenic warming should be significantly reduced after ∼ 1980, when the AMO was in a rising phase.