Sentences with phrase «with multidecadal oscillations»

Not exact matches

The researchers compared this long fire record with weather patterns: the well - known El Nino and La Nina cycles that occur every two to seven years, as well as longer cycles called the Pacific Decadal Oscillation and the Atlantic Multidecadal Oscillation (AMO).

Furthermore, since the end of the 19th century, we find an increasing variance in multidecadal hydroclimatic winter and spring, and this coincides with an increase in the multidecadal North Atlantic Oscillation (NAO) variability, suggesting a significant influence of large - scale atmospheric circulation patterns.

Most of flood periods coincided with the warm phase of the Atlantic Multidecadal Oscillation (AMO).

These indices are defined in analogy with the Atlantic Multidecadal Oscillation (AMO) index.

In the Northwest Atlantic we expect recruitment varies with the Atlantic Multidecadal Oscillation (AMO).

NOAA has issued its annual forecast for the hurricane season, along with its now - standard explanation that there is a natural cycle of multidecadal (40 - 60 year) length in the North Atlantic circulation (often referred to as the «Atlantic Multidecadal Oscillation» — see Figure), that is varying the frequency of Atlantic tropical cyclones, and that the present high level of activity is due to a concurrent positive peak in this multidecadal (40 - 60 year) length in the North Atlantic circulation (often referred to as the «Atlantic Multidecadal Oscillation» — see Figure), that is varying the frequency of Atlantic tropical cyclones, and that the present high level of activity is due to a concurrent positive peak in this Multidecadal Oscillation» — see Figure), that is varying the frequency of Atlantic tropical cyclones, and that the present high level of activity is due to a concurrent positive peak in this oOscillation» — see Figure), that is varying the frequency of Atlantic tropical cyclones, and that the present high level of activity is due to a concurrent positive peak in this oscillationoscillation.

Maybe, but they are NOT a wash when you are considering a period of the order, or shorter than, the multidecadal time scales associated with these oscillations.

If individuals truly interested in this topic don't, at a minimum, research the Atlantic Multidecadal Oscillation, the Pacific Decadal Oscillation, and the various solar cycles and their relationship with changes in temperatures, then I am afraid those individuals are no more interested in knowledge than a lazy 4th grader... they drink the Kool - Aid, but they won't do their homework.

It will take some time to integrate the findings of this study with other evidence of changes in North Atlantic ocean circulation, including the changes seen in salinity, changes in the so - called Atlantic Multidecadal Oscillation (AMO)(see e.g. Knight et al, 2005 and references therein) and other indicators of Atlantic climate change (e.g. Dickson et al, 2002).

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 meaOscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 meaoscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

I for one have published a number of papers very much arguing for its existence (e.g. Delworth and Mann, 2000 and Knight et all, 2005, you can find reprints of both here), and must confess that I actually coined the term «Atlantic Multidecadal Oscillation» in an interview with Richard Kerr of Science in 2000.

In the 1930s, warming was localised to the high latitudes, consistent with this warming being the result of a natural oscillation (the so - called «Atlantic Multidecadal Oscillatioscillation (the so - called «Atlantic Multidecadal OscillationOscillation»).

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.

On the contrary, both my poster and the subsequent discussion associates SAW with «all multidecadal ocean oscillations as a single phenomenon.»

The period from 1660 to 1760 with an approximate 60 - year cycle (1.5 cycles) looks suspiciously like the Atlantic Multidecadal Oscillation to me which then reappears in the record after 1880 for another ~ 2 cycles taking us to the present day.

The multidecadal oscillations of the Earth's core relative to the crust described at this 2000 paper by Hide et al fits quite well with this theory, and gives an alternative to the more naive «seismic events» in my theory.

There is also evidence that the drift is associated with the phase of the Arctic Oscillation and Atlantic Multidecadal Oscillation.

Recent analyses show similar northward fish migrations are associated with intruding warm Atlantic waters, driven by natural shifts in the North Atlantic Oscillations and Atlantic Multidecadal Oscillation.

The variations are strongly correlated with the similar decadal fluctuations observed in the Atlantic Multidecadal Oscillation index, and less so with the El Nino Southern Oscillation index.

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.

The BEST team found that greenhouse gases and volcanic eruptions could account for most of the observed temperature change, and suggest that the remainder of the variability is fairly consistent with the Atlantic Multidecadal Oscillation (AMO), an ocean cycle, and very little contribution from changes in solar activity (Figure 2).

However the temperature trend correlates much better with the heat ventilating cycles of Pacific Decadal Oscillation and the Atlantic Multidecadal Oscillation.

This oscillation is present in the Atlantic Multidecadal Oscillation (AMO), Arctic Oscillation (AO), North Atlantic Oscillation (NAO), Pacific Decadal Oscillation (PDO), Length of Day (LOD), and Global (GST) and Northern Hemisphere (NHT) temperatures, with different lags oscillation is present in the Atlantic Multidecadal Oscillation (AMO), Arctic Oscillation (AO), North Atlantic Oscillation (NAO), Pacific Decadal Oscillation (PDO), Length of Day (LOD), and Global (GST) and Northern Hemisphere (NHT) temperatures, with different lags Oscillation (AMO), Arctic Oscillation (AO), North Atlantic Oscillation (NAO), Pacific Decadal Oscillation (PDO), Length of Day (LOD), and Global (GST) and Northern Hemisphere (NHT) temperatures, with different lags Oscillation (AO), North Atlantic Oscillation (NAO), Pacific Decadal Oscillation (PDO), Length of Day (LOD), and Global (GST) and Northern Hemisphere (NHT) temperatures, with different lags Oscillation (NAO), Pacific Decadal Oscillation (PDO), Length of Day (LOD), and Global (GST) and Northern Hemisphere (NHT) temperatures, with different lags Oscillation (PDO), Length of Day (LOD), and Global (GST) and Northern Hemisphere (NHT) temperatures, with different lags (figure 1).

Like the earlier warming event and migrations, the most recent northward advance of small fish such as sardines, anchovies and herring correlate very well with the Atlantic Multidecadal Oscillation and the current distribution of fish from southerly waters is «almost identical to that described by Aurich for 1951.»

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.

Conclusion: There has been a long - term warming trend of around 0.5 C per century with a strong multidecadal oscillation superimposed.

Multi-decadal oscillations plus trend hypothesis: 20th century climate variability / change is explained by the large multidecadal oscillations (e.g NAO, PDO, AMO) with a superimposed trend of external forcing (AGW warming).

I disagree with: — the large multidecadal oscillations (e.g NAO, PDO, AMO) being unforced.

For detailed evidence with graphs see Relationship of Multidecadal Global Temperatures to Multidecadal Ocean Oscillations Ch.

The warming and cooling cycles in the Arctic have nothing at all to do with global warming, but follow the Atlantic Multidecadal Oscillation, a perfectly natural event, which NOAA says has been occurring for at least the last 1000 years.

You can find me at GC21C - 0566 with a poster titled «An Ekman Transport Mechanism for the Atlantic Multidecadal Oscillation».

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).

We show that a harmonic constituent model based on the major astronomical frequencies revealed in the aurora records and deduced from the natural gravitational oscillations of the solar system is able to forecast with a reasonable accuracy the decadal and multidecadal temperature oscillations from 1950 to 2010 using the temperature data before 1950, and vice versa.

«Accompanied by significant peaks at 60.2 and 73 years, the continuously periodicities around 49 — 114 years in our regional temperature reconstruction might tentatively be related to PDO, Atlantic Multidecadal Oscillation... as well as solar activity... The AMO was an important driver of multidecadal variations in summer climate not only in North America and western Europebut also in the East Asia... The 60.2 - year peak associated with AMO demonstrated that multidecadal variations in late summer temperature in the NWSP NWSP [northwestern Sichuan Plateau, China] might be controlled byMultidecadal Oscillation... as well as solar activity... The AMO was an important driver of multidecadal variations in summer climate not only in North America and western Europebut also in the East Asia... The 60.2 - year peak associated with AMO demonstrated that multidecadal variations in late summer temperature in the NWSP NWSP [northwestern Sichuan Plateau, China] might be controlled bymultidecadal variations in summer climate not only in North America and western Europebut also in the East Asia... The 60.2 - year peak associated with AMO demonstrated that multidecadal variations in late summer temperature in the NWSP NWSP [northwestern Sichuan Plateau, China] might be controlled bymultidecadal variations in late summer temperature in the NWSP NWSP [northwestern Sichuan Plateau, China] might be controlled by AMO.»

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.

Superimposed on the secular trend is a natural multidecadal oscillation of an average period of 70 y with significant amplitude of 0.3 — 0.4 °C peak to peak, which can explain many historical episodes of warming and cooling and accounts for 40 % of the observed warming since the mid-20th century and for 50 % of the previously attributed anthropogenic warming trend (55).

A debate concerns the nature of these increases with some studies attributing them to a natural climate fluctuation, known as the Atlantic Multidecadal Oscillation (AMO), and others suggesting climate change related to anthropogenic increases in radiative forcing from greenhouse - gases.

They include the Atlantic Multidecadal Oscillation (AMO) that exhibited a warm phase from 1930 - 1965, but with a transient drop between 1945 and 1948, a Pacific Decadal Oscillation (PDO) that shifted from warm to cold between 1942 and 1950, and a series of El Nino conditions from 1939 through 1942.

This interest in natural variability led to an irony: one of Mann's first papers, a collaboration with Jeffrey Park, provided evidence for the existence of a natural cycle, the Atlantic Multidecadal Oscillation, or AMO.

We identify multidecadal oscillations in extremes estimated by fitting the GEV distribution, with approximate periodicities of about 17 - 21 years, 30 - 38 years, 49 - 68 years, 85 - 94 years, and 145 - 172 years.

Whereas each model demonstrates some sort of multidecadal variability (which may or may not be of a reasonable amplitude or associated with the appropriate mechanisms), the ensemble averaging process filters out the simulated natural internal variability since there is no temporal synchronization in the simulated chaotic internal oscillations among the different ensemble members.

What you have claimed is that there is a «multidecadal oscillation», one which you have not identified with any physical phenomenon.

And despite not knowing what we're looking for, just some ephemeral «multidecadal oscillation» that appears and disappears, you claim that 144 years of data (two troughs and one peak) are enough to «establish [a] climate relationship»... «fraid I can't help you with that one...

Now you are saying that it is really a temporary «multidecadal oscillation» which will change in some unspecified manner with some unidentified quantity called the «climate forcing».