Sentences with phrase «multidecadal mode»

The observed internal variability so estimated exhibits a pronounced multidecadal mode with a distinctive spatiotemporal signature, which is altogether absent in model simulations.

It is this low - frequency portion of the record that contains information about an important multidecadal mode of variability that extends into the modern, industrial era.

How oceanic and atmospheric circulation patterns translate into things that matter directly to society (e.g. surface climate and weather) requires longer data sets that allows us to understand how the major multidecadal modes translate into atmospheric circulation patterns and surface climate.

b) failure of the climate models to predict a > 17 year plateau raises questions about the suitability of the climate models for detection and attribution analyses, particularly in terms of accounting adequately for multidecadal modes of climate variability...

And finally, attribution studies can't simply rely on model simulations, since model simulations (even if they capture the correct spectrum of variability) won't match the observed realization of the multidecadal modes in terms of timing.

Not exact matches

Hopefully, more refined work with recent and future data, and incorporation of research into the coupling mechanisms themselves, will allow us to validate the model climate sensitivities to the various forcings, and confidently reproduce multidecadal internal climate modes.

... On decadal to multidecadal timescales, the Pacific Decadal Oscillation (PDO), the Atlantic Multidecadal Oscillation, and the Atlantic tripole mode determine the variability of rainfall over India (Sen Roy et al., 2003; Lu et al., 2006; Zhang and Delworth, 2006; Li et al., 2008; Sen Roy, 2011; Krishnamurthy and Krishnamurthy, 2014a, 20multidecadal timescales, the Pacific Decadal Oscillation (PDO), the Atlantic Multidecadal Oscillation, and the Atlantic tripole mode determine the variability of rainfall over India (Sen Roy et al., 2003; Lu et al., 2006; Zhang and Delworth, 2006; Li et al., 2008; Sen Roy, 2011; Krishnamurthy and Krishnamurthy, 2014a, 20Multidecadal Oscillation, and the Atlantic tripole mode determine the variability of rainfall over India (Sen Roy et al., 2003; Lu et al., 2006; Zhang and Delworth, 2006; Li et al., 2008; Sen Roy, 2011; Krishnamurthy and Krishnamurthy, 2014a, 2014b, 2016b).

Here we demonstrate that the multidcadal variability in NHT including the recent warming hiatus is tied to the NAT - NAO - AMO - AMOC coupled mode and the NAO is implicated as a useful predictor of NHT multidecadal variability.

«Multidecadal variability of Atlantic tropical cyclone activity is observed to relate to the Atlantic Multidecadal Oscillation (AMO)-- a mode manifesting primarily in sea surface temperature (SST) in the high latitudes of the North Atlantic.

Patterns of variability that don't match the predicted fingerprints from the examined drivers (the «residuals») can be large — especially on short - time scales, and look in most cases like the modes of internal variability that we've been used to; ENSO / PDO, the North Atlantic multidecadal oscillation etc..

An analysis published earlier this year (Wu et al, Clim Dyn (2011) 37:759 — 773 DOI 10.1007 / s00382 -011-1128-8) extracted, using empirical mode decomposition (EMD), a multidecadal (65 - year) component to global temperature trends.

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.

The Atlantic Multidecadal Oscillation (AMO) or Variability (AMV) is a mode of low frequency (i.e., decadal to multidecadal) climate variability centered over the North AtlMultidecadal Oscillation (AMO) or Variability (AMV) is a mode of low frequency (i.e., decadal to multidecadal) climate variability centered over the North Atlmultidecadal) climate variability centered over the North Atlantic basin.

More recent work is identifying climate shifts working through the El Niño - Southern Oscillation (ENSO), Atlantic Multidecadal Oscillation (AMO), Pacific Decadal Oscillation (PDO), North Atlantic Oscillation (NAO), Southern and Northern Annular Modes (SAM and NAM), Artic Oscillation (AO), Indian Ocean Dipole (IOD), North Pacific Oscillation (NPO) and other measures of ocean and atmospheric states.

Periods of more frequent storm events over the two last centuries are analysed first in order to link these events with possible forcing mechanisms (North Atlantic Oscillation (NAO) and Atlantic Multidecadal Oscillation (AMO) modes) triggering the most destructive storms.

They do a poor job at simulating the observed modes of natural internal climate variability (e.g. the multidecadal ocean oscillations).

The Atlantic Multidecadal Oscillation (like other ocean oscillations) is a climate pattern with a mode of variability, which seems to naturally occur regardless of atmospheric CO2 levels.

Other well - known modes of variability include: The Antarctic oscillation; The Arctic oscillation; The Atlantic multidecadal oscillation; The Indian Ocean Dipole; The Madden — Julian oscillation; The North Atlantic oscillation; The Pacific decadal oscillation; The Pacific - North American teleconnection pattern; The Quasi-biennial oscillation.

Moreover, 370 years of tropical cyclone data from the Lesser Antilles (the eastern Caribbean island chain that bisects the main development region for landfalling U.S. hurricanes) show no long - term trend in either power or frequency but a 50 - to 70 - year wave pattern associated with the Atlantic Multidecadal Oscillation, a mode of natural climate variability.

We show that in the latter case, the multidecadal oscillatory mode of the smoothed AMO index with an assigned period length of 50 — 70 years can be a simple statistical artifact, a consequence of limited record length.

Given that the past 30 — 50 years is a relatively short period for evaluating long - term trends, the SST trends themselves could be viewed as a manifestation of large - scale modes of multidecadal Pacific variability (e.g. Zhang et al. 1997; Deser et al. 2004) or as part of the century scale positive SST trends associated with climate change (e.g. Deser et al. 2010); it is likely that both multidecadal climate variability and climate change have contributed to the SST trend pattern evident in Fig. 9 and used to force the model.

Additionally, several climatological oscillatory mode data will be used as controls to assess the correlations between GCR flux, solar activity, and cloud cover: specifically the Atlantic Multidecadal Oscillation (AMO), the multivariate El Nino Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO), the Pacific Decadal Oscillation (PDO), and the Quasi-Biennial Oscillation (QBO).

Subsequent observational studies and simulations with coupled atmosphere — ocean models have found similar multidecadal climatic modes, typically originating in the North Atlantic Ocean; however, the excitation source or sources of these oscillations have not been unambiguously identified (Knight 2009).

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.

The modes of natural internal variability of greatest relevance are the Atlantic modes (AMO, NAO) and the Pacific models (PDO, often referred to as IPO) of multidecadal climate variability, with nominal time scales of 60 - 70 + years.

Getting these multidecadal variations correct in the reconstructions would be very valuable in understanding the modes of natural internal climate variability, and to what extent such variations might explain 20th century climate variability.

That leaves the North Atlantic, but it has another mode of natural variability called the Atlantic Multidecadal Oscillation...... which is why it doesn't cool between the strong El Niños.