Sentences with phrase «decadal oscillation time»

Related to this story: The Pacific Decadal Oscillation Time Series from the University of Washington, seen below.

Not exact matches

That's largely because of a long - time - scale weather pattern called the Pacific Decadal Oscillation, which is masking the global effect.

On decadal time scales, annual streamflow variation and precipitation are driven by large - scale patterns of climate variability, such as the Pacific Decadal Oscillation (see teleconnections description in Climate chapter)(Pederson et al. 2011a; Seager and Hoerlingdecadal time scales, annual streamflow variation and precipitation are driven by large - scale patterns of climate variability, such as the Pacific Decadal Oscillation (see teleconnections description in Climate chapter)(Pederson et al. 2011a; Seager and HoerlingDecadal Oscillation (see teleconnections description in Climate chapter)(Pederson et al. 2011a; Seager and Hoerling 2014).

On shorter time scales, and layered on top of Pacific Decadal Oscillation variation, the Pacific North American pattern and the El Niño - Southern Oscillation cycles (see Climate chapter) can also affect variation in snowpack.

Plant drought - tolerant species in years with strong El Niño forecasts, particularly during Pacific Decadal Oscillation warm phase; plant trees that require sufficient water during establishment in La Niña years and during Pacific Decadal Oscillation cool phases Focus planting more in spring as fall planting becomes more difficult with reduced soil moisture and test different planting timings as springs shift earlier

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).

This too is questionable, as there are reasons to think the ocean uptake of heat varies at different time scales and may be influenced by ENSO, the Pacific Decadal Oscillation (PDO), and the Atlantic Multi-decadal Oscillation (AMO).

These events are crucial for the decadal frequency of the temperature at that time and produce something like a 9 year oscillation.

However, as the main source papers for the IPCC had to be gathered some time ago, the Scripps - led study of the Pacific decadal oscillation will not have made it into the final report, the first part of which will be presented at a meeting in Stockholm next month.

Abstract — 2008 Climate and wildfires in the North American boreal forest... Climate controls the area burned through changing the dynamics of large - scale teleconnection patterns (Pacific Decadal Oscillation / El Niño Southern Oscillation and Arctic Oscillation, PDO / ENSO and AO) that control the frequency of blocking highs over the continent at different time scales......... Since the end of the Little Ice Age, the climate has been unusually moist and variable: large fire years have occurred in unusual years, fire frequency has decreased and fire — climate relationships have occurred at interannual to decadal time scales...... http://rstb.royalsocietypublishing.org/content/363/1501/2315.short ---------------Decadal Oscillation / El Niño Southern Oscillation and Arctic Oscillation, PDO / ENSO and AO) that control the frequency of blocking highs over the continent at different time scales......... Since the end of the Little Ice Age, the climate has been unusually moist and variable: large fire years have occurred in unusual years, fire frequency has decreased and fire — climate relationships have occurred at interannual to decadal time scales...... http://rstb.royalsocietypublishing.org/content/363/1501/2315.short ---------------decadal time scales...... http://rstb.royalsocietypublishing.org/content/363/1501/2315.short ----------------------

The long time range of this dataset allows scientists to examine better long time scale climate processes such as the Pacific Decadal Oscillation and the Atlantic Multidecadal Oscillation as well as looking at the dynamics of historical climate and weather events.

The study by Macias & Johnson (2008) provides not only evidence for the link between decadal - scale changes in the teleconnection patterns (e.g. the Pacific Decadal Oscillation (PDO) index) and the increased fire frequency in the late twentieth century but also an explanation of why the pattern of fire variability and fire - climate relationships changes at different time scales from centennial / decadal to interannudecadal - scale changes in the teleconnection patterns (e.g. the Pacific Decadal Oscillation (PDO) index) and the increased fire frequency in the late twentieth century but also an explanation of why the pattern of fire variability and fire - climate relationships changes at different time scales from centennial / decadal to interannuDecadal Oscillation (PDO) index) and the increased fire frequency in the late twentieth century but also an explanation of why the pattern of fire variability and fire - climate relationships changes at different time scales from centennial / decadal to interannudecadal to interannual.....

Large - scale climate variations, such as the Pacific Decadal Oscillation (PDO), El Niño - Southern Oscillation (ENSO) and North Atlantic Oscillation (NAO), are occurring at the same time as the global climate is changing.

# # # During the earlier discussions of the upcoming El Niño event, the topic of the Pacific Decadal Oscillation or PDO was raised a number of times.

The decadal - scale mode associated with the Arctic Oscillation (AO) and a low - frequency oscillation (LFO) with an approximate time scale of 60 - 80 yearsOscillation (AO) and a low - frequency oscillation (LFO) with an approximate time scale of 60 - 80 yearsoscillation (LFO) with an approximate time scale of 60 - 80 years, dominate.

Now forced to explain the warming hiatus, Trenberth has flipped flopped about the PDO's importance writing «One of the things emerging from several lines is that the IPCC has not paid enough attention to natural variability, on several time scales,» «especially El Niños and La Niñas, the Pacific Ocean phenomena that are not yet captured by climate models, and the longer term Pacific Decadal Oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO) which have cycle lengths of about 60 years.»

The method is a straight - forward application of the first law of thermodynamics and uses only the time - integral of sunspot count and 32 - year long up trends and down trends that have an amplitude of 0.45 C and are probably related to the Pacific Decadal Oscillation.

With the Pacific Decadal Oscillation now in decline and solar irradiation now falling we are already in very different times.

This article makes use of recent findings about the relatively short decadal or multi decadal (20 to 30 years) oceanic oscillations that, the writer contends, are short enough to bring the time scales involved in oceanic changes into line with the solar cycles of 11 years or so.

... I think the weakness in this post is the idea that decadal oscillations in climate properties are potentially drivers of climate warming over time.

Bart quoted me as saying: «However, I think the weakness in this post is the idea that decadal oscillations in climate properties are potentially drivers of climate warming over time.»

However, I think the weakness in this post is the idea that decadal oscillations in climate properties are potentially drivers of climate warming over time.

The Arctic Oscillation was fairly stable until about 1970, but then varied on more or less decadal time scales, with signs of an underlying upward trend, until the late 1990s, when it again stabilized.

Climate models don't try to time decadal or other oscillations.

But California droughts are also fundamentally linked to the quantities and timing of precipitation, the dynamics of storm formation in the Pacific Ocean, the impacts of climate change on the frequency and intensity of El Niño and La Niña events and the Pacific Decadal Oscillation, and the behavior of the jet stream as conditions in the Arctic change.

The natural causes of climate variations that have time scales (century, decadal; e.g. Schwabe sunspot cycles, average solar output during the satellite measuring era,, ENSO / PDO / AMO and the rest of the alphabet soup of «oscillations», volcanism) either don't capture energy over multiple cycles — if I push a child on a swing, his average position doesn't move away from me — or are going in the wrong direction.

This may explain the frequent finding that many global warming time series, e.g., the Southern oscillation index and the Pacific decadal oscillation, show distinct cycle times (Power spectral analysis: 3 — 5, 7 — 8, 13 — 15, 22 — 24, and 29 — 30 years).

Given the downtrend in global temperatures over the past 11 years and the likelihood that this will continue for some time (see Section 2.4 of my Comments) because of the Pacific Decadal Oscillation (PDO), there would appear to be ample time to start over and do it carefully and thoroughly this time with full input by everyone that may be interested.