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
Late Holocene climates of the Near East deduced from Dead Sea level variations and modern regional winter rainfall
Yehouda Enzel,Revital Bookman,David Sharon,Haim Gvirtzman,Uri Dayan,Baruch Ziv,Baruch Ziv,Mordechai Stein +7 more
TL;DR: In this article, the decadal to centennial-resolution Holocene lake-level curve of the Dead Sea was presented and the regional hydrological and EM climatology that affected level variations were determined.
Journal ArticleDOI
Multiscale Variabilities in Global Sea Surface Temperatures and Their Relationships with Tropospheric Climate Patterns
TL;DR: In this paper, a complex empirical orthogonal function (CEOF) analysis of sea surface temperature anomaly (SSTA) data from the midnineteenth century through 1991 is performed and the global ENSO from the SSTA data, plus a linear trend everywhere, are subsequently removed in order to consider other global modes of variability uncontaminated by the intra-and interbasin effects of ENSo.
Journal ArticleDOI
Scandinavian pattern and its climatic impact
Cholaw Bueh,Hisashi Nakamura +1 more
TL;DR: In this article, the authors investigated the maintenance mechanisms of the Scandinavian teleconnection pattern and its possible impact on the Eurasian climate on the basis of long-term monthly data and showed that the pattern shows apparent seasonality in its dynamical properties, including the wave-train orientation and wavelength, under the seasonally varying transient-eddy feedback forcing and waveguide structure for Rossby waves.
Journal ArticleDOI
Asian Jet Waveguide and a Downstream Extension of the North Atlantic Oscillation
TL;DR: In this article, anomalous atmospheric fields associated with the North Atlantic Oscillation (NAO) are analyzed on interannual and intraseasonal time scales in order to examine the extent to which the NAO is a regional phenomenon.
Journal ArticleDOI
Spatiotemporal drought variability in the Mediterranean over the last 900 years.
Benjamin I. Cook,Benjamin I. Cook,Kevin J. Anchukaitis,Kevin J. Anchukaitis,Ramzi Touchan,David M. Meko,Edward R. Cook +6 more
TL;DR: Analysis of Mediterranean drought variability in the Old World Drought Atlas and a spatiotemporal tree-ring reconstruction of the June-July-August self calibrating Palmer Drought Severity Index confirm the exceptional nature of this drought relative to natural variability in recent centuries, consistent with studies that have found evidence for anthropogenically forced drying in the region.
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