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Persistent Positive North Atlantic Oscillation Mode Dominated the Medieval Climate Anomaly
The Medieval Climate Anomaly (MCA) was the most recent pre-industrial era warm interval of European climate, yet its driving mechanisms remain uncertain. We present here a 947-year-long multidecadalExpand
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Decadal-scale climate variability in the tropical and North Pacific during the 1970s and 1980s: observations and model results
An abrupt change in the large-scale boreal winter circulation pattern over the North Pacific was observed during the mid-1970s. Most notably, this change was marked by a southward shift andExpand
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Importance of the Indian Ocean for simulating rainfall anomalies over eastern and southern Africa
The relative contributions of the Indian Ocean and Pacific Ocean sea surface temperatures (SSTs) to the rainfall variability over eastern central, and southern Africa during the austral spring-summerExpand
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Areas beneath the relative operating characteristics (ROC) and relative operating levels (ROL) curves: Statistical significance and interpretation
The areas beneath the relative (or receiver) operating characteristics (ROC) and relative operating levels (ROL) curves can be used as summary measures of forecast quality, but statisticalExpand
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Evidence for Intensification of North Pacific Winter Cyclones since 1948
Abstract Using NCEP–NCAR reanalysis and in situ data, evidence of important changes in the winter (December–March) cyclone climatology of the North Pacific Ocean over the past 50 years is found. TheExpand
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Decadal Variability of Precipitation over Western North America
Abstract Decadal (>7- yr period) variations of precipitation over western North America account for 20%–50% of the variance of annual precipitation. Spatially, the decadal variability is broken intoExpand
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The origin of deep ocean microseisms in the North Atlantic Ocean
Oceanic microseisms are small oscillations of the ground, in the frequency range of 0.05–0.3 Hz, associated with the occurrence of energetic ocean waves of half the corresponding frequency. In 1950,Expand
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Conditional Probabilities, Relative Operating Characteristics, and Relative Operating Levels
Abstract The relative operating characteristic (ROC) curve is a highly flexible method for representing the quality of dichotomous, categorical, continuous, and probabilistic forecasts. The method isExpand
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Convective cloud systems and warm-pool sea surface temperatures : coupled interactions and self-regulation
Questions regarding the upper limits on tropical sea surface temperatures and the processes determining those limits have recently come under renewed interest and debate. We present results from anExpand
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