A dendroclimatological reconstruction of climate since AD 1700 in the Mt. Waddington area, British Columbia Coast Mountains, Canada

Larocque, Sonya J.; Smith, Dan J.

doi:10.1016/j.dendro.2005.02.003

Cited by 40 publications

(44 citation statements)

References 37 publications

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“…The potential negative impacts of high snowfall on tree growth Peterson 2001, Larocque andSmith 2005) remained unclear in this study because our data did not show significant relationships between winter precipitation and the ring-width chronologies of lodgepole pine or subalpine fir (Appendix C). However, Knowles et al (2006) showed that reduced snowfall in the western United States in the past 55 years was unrelated to the changes in the total precipitation.…”

Section: October-march Temperaturesmentioning

confidence: 85%

“…For example, Peterson and Peterson (1994) suggest that soil temperatures and the accumulation of growing-days after snowmelt may determine the timing of bud burst and the height growth initiation of subalpine fir. Several tree-ring studies showed that high-elevation subalpine fir (Peterson and Peterson 1994, Ettl and Peterson 1995, Peterson et al 2002, Larocque and Smith 2005 Although no monthly snowpack data were available in this study, reduced snowpack was expected in the positive PDO years because October-March PDO had positive correlations with temperatures and negative correlations with precipitation at most sites (Table 3.5). Actual snow date may help in clarifying the PDO-snow relationships at each site and in examining correlations between ring-width chronologies and snow variables such as snow depth and timing of snowmelt in spring (Oberhuber 2004, Pfeifer et al 2005).…”

Section: Important Growth-climate Relationshipsmentioning

confidence: 99%

“…Peterson and Peterson (2001) and Peterson et al (2002) suggest that the timing of snowmelt in the spring may determine the date of growth initiation of subalpine fir at high-elevations. Several studies showed that snowpack in early spring (April-May) was negatively correlated with the radial growth of subalpine fir (Peterson and Peterson 1994, Peterson et al 2002, Larocque and Smith 2005, lodgepole pine (Case and Peterson 2007) and mountain hemlock (Graumlich andBrubaker 1986, Peterson and at high-elevations in western North America and several…”

Section: October-march Temperaturesmentioning

confidence: 99%

“…The first three principal components (PCs) together accounted for 76.8 % of the total variance in the nine ring-width chronologies for the period 1953-2002 (Table 3. October to March prior to growth were average and used for the further analyses because 1) this duration corresponded to the October-March temperatures and thus, the impacts of PDO and temperatures on tree growth can be easily associated, 2) PDO generally has the strongest influences on the local climate of western North America from October to March (Biondi et al 2001), and 3) several studies reported the importance of PDO for tree radial growth in the winter months (i.e., Ettl and Peterson 1995, Gedalof and Smith 2001, Peterson et al 2002, Larocque and Smith 2005. October-March PDO and temperatures were also positively correlated at each site (Table 3.5).…”

Section: Similarity Among Ring-width Chronologiesmentioning

confidence: 99%

“…Several studies also reported that subalpine fir had strong associations with winter and spring temperatures and snow depth at high-elevations but not at low-elevations (Ettl and Peterson 1995, Peterson et al 2002, Larocque and Smith 2005.…”

mentioning

confidence: 99%

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Growth responses of three coexisting conifer species to climate variables across a range of climate conditions.

Miyamoto¹

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Section: October-march Temperaturesmentioning

confidence: 85%

Section: Important Growth-climate Relationshipsmentioning

confidence: 99%

Section: October-march Temperaturesmentioning

confidence: 99%

Section: Similarity Among Ring-width Chronologiesmentioning

confidence: 99%

mentioning

confidence: 99%

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Growth responses of three coexisting conifer species to climate variables across a range of climate conditions.

Miyamoto¹

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Multi‐century reconstructions of Pacific salmon abundance from climate‐sensitive tree rings in west central British Columbia, Canada

2012

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Short records of naturally fluctuating Pacific salmon (Oncorhynchus spp.) populations elicit challenges for the long‐term management of North American fisheries. A dendrochronologic approach was used to reconstruct long proxy histories of regional Pacific salmon populations returning to streams along west central British Columbia coastlines. Tree rings from five tree species collected at 18 sites were found to be sensitive to interannual fluctuations in large‐scale ocean and atmospheric circulation patterns. Using a regional network of climate‐sensitive ring‐width and ring‐density tree‐ring chronologies in linear regression models, multi‐century long‐term abundance records for populations of sockeye, chinook, chum and pink salmon were generated. Models explained between 27% and 39% of the variability in escapement records and were more proficient at capturing trends than annual magnitudes. The reconstructions vary in length, dating from 1400, 1536 and 1638 ad and extending to 2009 ad. Notable fluctuations in salmon abundance over the past six centuries are described, with significant population collapses shown to occur during the early 1400s, the late 1500s, the mid‐1600s, the early 1700s, the early 1800s and parts of the 1900s. These models are the first to utilize climate‐sensitive tree‐ring records to reconstruct regional abundance histories and thus contribute potentially valuable information for salmon fisheries managers. Copyright © 2012 John Wiley & Sons, Ltd.

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A 477-year dendrohydrological assessment of drought severity for Tsable River, Vancouver Island, British Columbia, Canada

Coulthard

Smith

2015

Hydrol. Process.

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Summer streamflow droughts are becoming more severe in many watersheds on Vancouver Island, British Columbia, as a result of climate warming. Small coastal basins that are the primary water source for most communities and essential to Pacific salmon populations have been particularly affected. Because the most extreme naturally occurring droughts are rarely captured within short instrumental records water managers likely underestimate, and are unprepared for, worst‐case scenario low flows. To provide a long‐term perspective on recent droughts on Vancouver Island, we developed a 477‐year long dendrohydrological reconstruction of summer streamflow for Tsable River based on a network of annual tree‐ring width data. A novel aspect of our study is the use of conifer trees that are energy limited by spring snowmelt timing. Explaining 63% of the instrumental streamflow variability, to our knowledge the reconstruction is the longest of its kind in British Columbia. We demonstrate that targeting the summer streamflow component derived from snowmelt is powerful for determining drought‐season discharge in hybrid runoff regimes, and we suggest that this approach may be applied to small watersheds in temperate environments that are not usually conducive to dendrohydrology. Our findings suggest that since 1520, 21 droughts occurred that were more extreme than recent ‘severe’ events like those in 2003 and 2009. Recent droughts are therefore not anomalous relative to the ~400‐year pre‐instrumental record and should be anticipated within water management strategies. In coming decades, worst‐case scenario natural droughts compounded by land use change and climate change could result in droughts more severe than any since 1520. The influence of the Pacific Decadal Oscillation on instrumental and modelled Tsable River summer streamflow is likely linked to the enhanced role of snowmelt in determining summer discharge during cool phases. Copyright © 2015 John Wiley & Sons, Ltd.

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A dendroclimatological reconstruction of climate since AD 1700 in the Mt. Waddington area, British Columbia Coast Mountains, Canada

Cited by 40 publications

References 37 publications

Growth responses of three coexisting conifer species to climate variables across a range of climate conditions.

Growth responses of three coexisting conifer species to climate variables across a range of climate conditions.

Multi‐century reconstructions of Pacific salmon abundance from climate‐sensitive tree rings in west central British Columbia, Canada

A 477-year dendrohydrological assessment of drought severity for Tsable River, Vancouver Island, British Columbia, Canada

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