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Tree-ring estimates of Pacific decadal climate variability

Tree-ring estimates of Pacific decadal climate variability,10.1007/s003820100177,Climate Dynamics,R. D'Arrigo,R. Villalba,G. Wiles

Tree-ring estimates of Pacific decadal climate variability   (Citations: 99)
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Decadal-scale oscillatory modes of atmosphere-ocean variability have recently been identified in instrumental studies of the Pacific sector. The regime shift around 1976 is one example of such a fluctuation, which has been shown to have significantly impacted climate and the environment along the coastline of the western N and S Americas. The length of meteorological data for the Pacific and western Americas critically limits analyses of such decadal-scale climate variability. Here we present reconstructions of the annual Pacific Decadal Oscillation (PDO) index based on western North American tree-ring records which account for up to 53% of the instrumental variance and extend as far back as AD 1700. The PDO reconstructions indicate that decadal-scale climatic shifts have occurred prior to the period of instrumental record. Evaluation of temperature and precipitation-sensitive tree-ring series from the northeast Pacific as well as these reconstructions reveals evidence for a shift towards less pronounced interdecadal variability after about the middle 1800s. Our analyses also suggest that sites from both the northeast Pacific coast as well as the subtropical Americas need to be included in proxy data sets used to reconstruct the PDO.
Journal: Climate Dynamics - CLIM DYNAM , vol. 18, no. 3, pp. 219-224, 2001
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    • ... and the Bering Sea [Foreman et al., 2006] might induce bidecadal variability into the subarctic water masses [Loder and Garrett, 1978; Royer, 1993; Osafune and Yasuda, 2006; Wilson et al., 2007; McKinnell and Crawford, 2007; S. Osafune and I. Yasuda, Bidecadal variability in water masses around the Bering Sea and the relation with 18.6-year period nodal tidal cycle, submitted toJournal of Geophysical Research, 2008] and climate [Currie, 1984, ...
    • ...Although the statistical existence of the 18.6-year cycle was already confirmed in the drought indices on the Pacific side of the North and South America [Currie, 1984, 1991; Cook et al., 1997; Herweijer et al., 2007] and in the Gulf of Alaska temperature [Wilson et al., 2007], it is noted that the cycle is detected in the nearly global climate index of PDO and the phase relationship is found between PDO and the cycle...

    Ichiro Yasuda. The 18.6-year period moon-tidal cycle in Pacific Decadal Oscillation r...

    • ...Over the past decade, a network of crossdated surface-fire chronologies has been developed from fire scars across the inland Northwest, with 15 sites sampled over 7 degrees of latitude in the interiors of Oregon, Washington and British Columbia (Everett et al. 2000; Heyerdahl et al. 2001, 2007; Daniels and Watson 2003; Hessl et al. 2004; Wright and Agee 2004)...
    • ...The climate drivers of fire have been analysed for many of these sites individually or in small groups of sites (Heyerdahl et al. 2002; Daniels and Watson 2003; Hessl et al. 2004; Wright and Agee 2004)...
    • ... in the interior of Oregon, Washington and southern British Columbia (Fig. 1). Fire-scarred trees were sampled systematically over large areas (262 to 30 000 ha) in grids of multi-tree plots (Heyerdahl et al. 2002, 2007; Wright and Agee 2004) or targeted within several topographic facets (Everett et al. 2000; Hessl et al. 2004), except at Cariboo, where nine 1-ha sites were sampled along an 85-km transect on the Fraser River Plateau (Daniels ...
    • ...All fire evidence was collected for other studies (Everett et al. 2000; Heyerdahl et al. 2001, 2007; Daniels and Watson 2003; Hessl et al. 2004;...

    Emily K. HeyerdahlAet al. Climate drivers of regionally synchronous fires in the inland Northwes...

    • ...It was also detected by tree rings [14, 16, 17, 35]...
    • ...This result does not agree with the results reported for northeast Asia [35], but is consistent with the results of D’Arrigo et al. [17] from North American...
    • ...The key effects of 20 year periodicity agree with some of the present reports of climate reconstructions that are based on tree-rings from seacoast of the Pacific [14, 17, 25, 35]...
    • ...They suggest that the PDO has been an important player in Pacific climate for at least the past a few centuries and that a 20–30 year cycle of climate regimes is normal [17, 25, 35]...

    Xingyuan Heet al. Solar activity, global surface air temperature anomaly and pacific dec...

    • ...given the region’s westerly storm tracks, and cold, dry continental air masses, the Continental Divide also causes the eastern foothills and high plains bordering the park to receive far less precipitation over the winter months (Figure 1; Cunningham 1982)...

    Gregory T. Pedersonet al. Long-Duration Drought Variability and Impacts on Ecosystem Services: A...

    • ...Although many researchers point to the need for very high resolution sampling to accurately resolve the full amplitude of the annual cycle with skeletal geochemical tracers, a lower sample resolution is often necessary given time and budgetary constraints in generating longer coral records [Quinn et al., 1996; Crowley et al., 1999]...
    • ...Therefore the averaging of the two Fiji Diploastrea records creates a composite record that should be more reflective of regional climate (Figure 9). Comparison to indices of large-scale climate fields validates the regional climate inferences drawn from corals [Crowley et al., 1999], making the SPI and NINO 4 indices very useful in evaluating Diploastrea’s climate reconstruction...

    Stefan Bagnatoet al. Evaluating the use of the massive coral Diploastrea heliopora for pale...

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