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
Regimes in the wintertime circulation over northern extratropics. I: Observational evidence
TL;DR: In this paper, the authors identified the northern extratropical circulation in winter as clusters of atmospheric states in a low-dimensional phase space generated by the leading EOFs of eddy geopotential fields.
Journal ArticleDOI
A Comparison Study of EOF Techniques: Analysis of Nonstationary Data with Periodic Statistics
Kwang-Y. Kim,Qigang Wu +1 more
TL;DR: In this paper, a comparison of eight eigen techniques for identifying independent physical/dynamical modes and corresponding principal component time series is presented, focusing on cyclostationary processes such as deforming and moving patterns.
Journal ArticleDOI
Influences of the El Niño/Southern Oscillation and the North Atlantic Oscillation on avian productivity in forests of the Pacific Northwest of North America
TL;DR: In this article, the effects of global climate phenomena on avian population dynamics were identified and quantified by identifying and quantifying the spatial and temporal relationships between climate, weather and bird populations.
Journal ArticleDOI
A European pattern climatology 1766–2000
TL;DR: In this article, the authors investigated the temporal and spatial evolution of these key climate variables and assessed the leading combined patterns of climate variability, using monthly independently reconstructed gridded European fields for the 500hPa height, temperature, and precipitation covering the last 235 years.
Journal ArticleDOI
Regional and global atmospheric patterns governing rainfall in the southern Levant
TL;DR: In this article, the authors tried to find a linkage between the interannual variations of the rainfall measured in 12 stations spread over the northern half of Israel (the southern Levant) and atmospheric circulations ranging from regional to global scale and found that an upper-level trough extending from Eastern Europe toward the Eastern Mediterranean (EM) is closely linked with the seasonal rainfall over the study area.
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