Not exact matches
A new report by the National Academies of Sciences, Engineering, and Medicine
finds that continuity of ocean observations is vital to gain an accurate understanding of the climate, and calls for a
decadal, national plan that is adequately resourced and implemented to ensure critical ocean information is available to understand and predict future
changes.
Using records stretching back to 1791, the study
finds that a switch in the Pacific
Decadal Oscillation or PDO has always been accompanied by
changes in temperature in the north and south Pacific Ocean.
The Atlantic Multidecadal Oscillation (AMO), Pacific
Decadal Oscillation (PDO), North Atlantic Oscillation (NAO), and El Niño - Southern Oscillation (ENSO) have all been found to significantly influence changes in surface air temperature and rainfall (climate) on decadal and multi-decadal scales, and these natural ocean oscillations have been robustly connected to changes in solar ac
Decadal Oscillation (PDO), North Atlantic Oscillation (NAO), and El Niño - Southern Oscillation (ENSO) have all been
found to significantly influence
changes in surface air temperature and rainfall (climate) on
decadal and multi-decadal scales, and these natural ocean oscillations have been robustly connected to changes in solar ac
decadal and multi-
decadal scales, and these natural ocean oscillations have been robustly connected to changes in solar ac
decadal scales, and these natural ocean oscillations have been robustly connected to
changes in solar activity.
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 measurements).
It should be noted that we are not suggesting here that all
decadal sea level variability is related to TWS, but do
find TWS variability to play a significant role in sea level
changes on the timescale of a decade.»
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.
By 2006 some models still
found that
changes in the ocean circulation «are able to produce abrupt climate
changes on
decadal to centennial time scales,» Randall et al. (2007), p. 641.
Indeed as Wallace
found changes in pH correlate with upwelling which increases during the negative Pacific
Decadal Oscillation.
We
find that cold season low ∆ 14C values were higher after the Pacific
Decadal Oscillation (PDO)
changed from a positive to a negative phase.