The AMO is linked with
decadal climate fluctuations, such as Indian and Sahel rainfall, European summer precipitation, Atlantic hurricanes and variations in global temperatures.
«Such
decadal climate fluctuations are superimposed on the general warming trend, so that at times it seems as if the warming trend slowed or even stopped.
Not exact matches
While the atmosphere is mainly causing
climate variations on shorter time scales, from months to years, the longer - term
fluctuations, such as those on
decadal time scales, are primarily determined by the ocean.
For the most part, I've not seen much evidence to suggest that internal variations alone can bring the
climate to a new state on
decadal timescales, even if the internal
fluctuations do not completely average out over decades (e.g.,, the PDO being in a positive phase more than a negative phase during the timescale of consideration).
«The forecast for global mean temperature which we published highlights the ability of natural variability to cause
climate fluctuations on
decadal scale, even on a global scale.
And now that our activities are directly affecting the world's
climate, this
fluctuation will exacerbate, and not just on a million - year time scale, but on a century - and
decadal - scale (and if things go really badly, possibly on an annual - scale).
LOL... PokerGuy, suppose that long - term
climate - change science was nearly perfect (up to
decadal scale
fluctuations)...
Causes of natural variability include forcings that are external to the
climate system (e.g., volcanic eruptions and aerosols and the 11 - year sunspot cycle) and internal
fluctuations (weather phenomena, monsoons, El Niño / La Niña, and
decadal cycles).
In conclusion, our analysis suggests that strong interannual and
decadal variations observed in the average land surface temperature records represent a true
climate phenomenon, not only during the years when
fluctuations on the timescale of 2 - 15 years had been previously identified with El Nino events.
Abstract:
Decadal fluctuations of the ocean and atmosphere over the North Pacific Ocean significantly affect the weather and
climate of North America and Eurasia.
Such
decadal temperature
fluctuations in the SPNA are strongly correlated with other components of the
climate system, for example, Atlantic hurricane activity, North American and European river flow, and rainfall over the African Sahel and northeast Brazil.
Although virtually all
climate records with annual resolution record
decadal - centennial scale
climate fluctuations, their origin is obscure.
Global, cyclic,
decadal,
climate patterns can be traced over the past millennium in glacier
fluctuations, oxygen isotope ratios in ice cores, sea surface temperatures, and historic observations.
Such as another fascinating paper by Don J. Easterbrook, Professor Emeritus in the Deptment of Geology at Western Washington University: «Solar Influence on Recurring Global,
Decadal,
Climate Cycles Recorded by Glacial
Fluctuations, Ice Cores, Sea Surface Temperatures, and Historic Measurements Over the Past Millennium» — Hat tip to Anthony Watt's Watts Up with That.
Analyses of satellite - derived phytoplankton concentration (available since 1979) have suggested
decadal - scale
fluctuations linked to
climate forcing, but the length of this record is insufficient to resolve longer - term trends.