Journal ArticleDOI
Classification, seasonality and persistence of low-frequency atmospheric circulation patterns
TLDR
In this article, Orthogonally rotated principle component analysis (RPCA) was used to identify and describe the seasonality and persistence of the major modes of interannual variability.Abstract:
Orthogonally rotated principle component analysis (RPCA) of Northern Hemisphere 1-month mean 700 mb heights is used to identify and describe the seasonality and persistence of the major modes of interannual variability. The analysis is detailed and comprehensive, in that 1) a high resolution, approximately equal-area 358-point grid is used for the virtually maximum possible 35-year period of record, 2) a positive bias in the NMC data base in the early 1950s in the subtropics is largely eliminated for the first time, and 3) homogeneous, separate analyses of each month of the year are carried out, detailing the mouth-to-month changes in the dominant circulation patterns. Winter results are similar to those of other recent RPCA and teleconnection studies except that some less obvious patterns are identified and further detail of the better-known patterns is provided. Two north-south dipole patterns are found over the Pacific Ocean (West Pacific Oscillation and East Pacific pattern) and over the Atla...read more
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Journal ArticleDOI
The Vertical Structure of Wintertime Climate Regimes of the Northern Hemisphere Extratropical Atmosphere
TL;DR: In this paper, a nonlinear generalization of principal component analysis (PCA) is applied to Northern Hemisphere wintertime geopotential heights at 1000, 700, 500, 300, and 20 hPa.
Journal ArticleDOI
Insignificant influence of the 11-year solar cycle on the North Atlantic Oscillation
TL;DR: In this article, the authors present evidence that contradicts the claim that there is a robust signal of the nearly periodic 11-year solar cycle in the North Atlantic Oscillation in winter, which raises the possibility of using the solar cycle to predict the circulation years in advance.
Journal ArticleDOI
Modeled and Observed Multidecadal Variability in the North Atlantic Jet Stream and Its Connection to Sea Surface Temperatures
TL;DR: In this paper, multidecadal variability in the North Atlantic jet stream in general circulation models (GCMs) is compared with that in reanalysis products of the twentieth century.
Journal ArticleDOI
The response of phytoplankton to climate variability associated with the North Atlantic Oscillation
TL;DR: In this paper, the authors quantified the interannual variability in the timing of phytoplankton spring bloom and community structure using ocean color data and continuous plankton recorder (CPR) data.
Journal ArticleDOI
Atmospheric forcing on chlorophyll concentration in the Mediterranean
TL;DR: In this paper, large-scale modes of atmospheric variability over the northern hemisphere are associated with chlorophyll-a concentration in the Mediterranean, while correlation maps were also built to distinguish between localized and distant effects.
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