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On the Average Value of Correlated Time Series, with Applications in Dendroclimatology and Hydrometeorology
Abstract In a number of areas of applied climatology, time series are either averaged to enhance a common underlying signal or combined to produce area averages. How well, then, does the average of aExpand
The Physical Science Basis
Influence of volcanic eruptions on Northern Hemisphere summer temperature over the past 600 years
A network of temperature-sensitive tree-ring-density chronologies provides circum-hemisphere information on year-by-year changes in summer warmth in different regions of the northern boreal forest.Expand
Fennoscandian summers from ad 500: temperature changes on short and long timescales
Quantitative estimates of 1480 years of summer temperatures in northern Fennoscandia have previously been derived from continuous treering records from northern Sweden. Here we show the results ofExpand
Low-frequency temperature variations from a northern tree ring density
We describe new reconstructions of northern extratropical summer temperatures for nine subcontinental-scale regions and a composite series representing quasi “Northern Hemisphere” temperature changeExpand
Recent Warming Reverses Long-Term Arctic Cooling
TLDR
A synthesis of decadally resolved proxy temperature records from poleward of 60°N covering the past 2000 years indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age. Expand
SPATIAL REGRESSION METHODS IN DENDROCLIMATOLOGY: A REVIEW AND COMPARISON OF TWO TECHNIQUES
We review and compare two alternative spatial regression methods used in dendroclimatology to reconstruct climate from tree rings. These methods are orthogonal spatial regression (OSR) and canonicalExpand
HISTALP—historical instrumental climatological surface time series of the Greater Alpine Region
This paper describes the HISTALP database, consisting of monthly homogenised records of temperature, pressure, precipitation, sunshine and cloudiness for the ‘Greater Alpine Region’ (GAR, 4–19°E,Expand
The 'segment length curse' in long tree-ring chronology development for palaeoclimatic studies
The problem of constructing millennia-long tree-ring chronologies from overlapping segments of cross-dated ring-width series is reviewed, with an emphasis on preserving very low-frequency signalsExpand
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