Glacier change and contribution to streamflow in the Canoe Basin, British Columbia, 1948-2005.

Brewis, Teresa Bessie

doi:10.24124/2013/bpgub941

Cited by 3 publications

(12 citation statements)

References 65 publications

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“…10 and 11). Observed mass and area loss coincided with intervals of increased (dewww.the-cryosphere.net/9/65/2015/ The Cryosphere, 9, 65-80, 2015 creased) temperatures (precipitation), a finding in agreement with previous studies for glaciers in the Cariboo Mountains (Luckman et al, 1987;Brewis, 2012). Previous studies implicate increases in surface air temperatures as the recent cause for accelerated mass loss of North American glaciers in maritime environments (Rasmussen and Conway, 2004;Arendt et al, 2009).…”

Section: Relations To Climatesupporting

confidence: 80%

“…1) thickened and advanced during the period 1955-1970. The post-1985 accelerated thinning of Cariboo Mountains glaciers agrees with other studies of glacier change in northwest North America (e.g., Rasmussen and Conway, 2004;Brewis, 2012;Tennant and Menounos, 2013). found that over the period [1985][1986][1987][1988][1989][1990][1991][1992][1993][1994][1995][1996][1997][1998][1999], and using different density assumptions, glaciers of the Cariboo Mountains thinned at a rate of −0.58 m w.e.…”

Section: Thickness Changesupporting

confidence: 80%

“…Our results indicate net recession of Cariboo Mountains glaciers from 1952 to 2005, consistent with other studies of glacier change in BC (DeBeer and Sharp, 2007;Brewis, 2012;Tennant et al, 2012;Tennant and Menounos, 2013). While net glacier change in our 33-glacier subset over this period is negative (−15.11 ± 1.89 km 2 or −10.6 ± 2.9 %), recession for 11 of these glaciers did not exceed measurement error.…”

Section: Area Changesupporting

confidence: 80%

“…www.the-cryosphere.net/9/65/2015/ Our finding of glacier advance in the period 1952-1985 accords with the advance in the Premier Range described by Luckman et al (1987) and with glacier expansion elsewhere in BC during this period (Koch et al, 2009;Menounos et al, 2009;Brewis, 2012;Tennant and Menounos, 2013). Studies that only determine net recession over a multi-decadal period (e.g., Sharp, 2007, 2009;Jiskoot et al, 2009) may not capture minor advances like those of the present study.…”

Section: Area Changesupporting

confidence: 70%

“…The two smallest glaciers of our study thickened and advanced over the same period. Brewis (2012) also found that four of six glaciers in the Canoe River basin (Fig. 1) thickened and advanced during the period 1955-1970.…”

Section: Thickness Changementioning

confidence: 94%

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Glacier change in the Cariboo Mountains, British Columbia, Canada (1952–2005)

2015

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Abstract. We applied photogrammetric methods with aerial photography from 11 different years between 1946 and 2005 to assess changes in area and volume of 33 glaciers in the Cariboo Mountains of British Columbia for the latter half of the 20th century. These are used to identify changes in extent and elevation primarily for the periods 1952-1985, 1985-2005, and 1952-2005. All glaciers receded during the period 1952-2005; area retreat averaged −0.19 ± 0.05 % a −1 . From 1952 to 1985, nine glaciers advanced; following 1985, retreat rates accelerated to −0.41 ± 0.12 % a −1 . Thinning rates of a subset of seven glaciers likewise accelerated, from −0.14 ± 0.04 m w.e. a −1 to −0.50 ± 0.07 m w.e. a −1 for the period 1985-2005. Temperatures increased from the earlier to the latter period for the ablation (+0.38 • C) and accumulation (+0.87 • C) seasons, and average precipitation decreased, particularly in the accumulation season (−32 mm, −3.2 %). Our comparison of surface area change with glacier morphometry corroborates previous studies that show primary relations between extent change and surface area. We also find that the strength and sign of these relations varied for different epochs. Our results also indicate that the 1985 glacier extent for the study area reported previously by other studies may be slightly overestimated due to errant mapping of late-lying snow cover.

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Section: Relations To Climatesupporting

confidence: 80%

Section: Thickness Changesupporting

confidence: 80%

Section: Area Changesupporting

confidence: 80%

Section: Area Changesupporting

confidence: 70%

Section: Thickness Changementioning

confidence: 94%

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Glacier change in the Cariboo Mountains, British Columbia, Canada (1952–2005)

2015

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Glacier change in the Cariboo Mountains of British Columbia, Canada (1946 -- 2011).

Beedle¹

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Glacier change in the Cariboo Mountains, British Columbia, Canada (1952–2005)

Beedle¹,

Menounos²,

Wheate³

2014

Preprint

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Abstract. We calculated dimensional change for 33 glaciers in the Cariboo Mountains of British Columbia for the latter half of the twentieth century. All glaciers receded during the period 1952–2005; area retreat averaged −0.19 ± 0.05% a−1. From 1952 to 1985, nine glaciers advanced. Following 1985, retreat rates accelerated to −0.41 ± 0.12% a−1. Thinning rates likewise accelerated, from −0.14 ± 0.04 m w.e. a−1 (1952–1985) to −0.50 ± 0.07 m w.e. a−1 for the period 1985–2005. Temperatures increased from the earlier to the latter period for the ablation (+0.38 °C) and accumulation (+0.87 °C) seasons, and average precipitation decreased, particularly in the accumulation season (−32 \\unit{mm}, −3.2%). Our comparison of surface area change with glacier morphometry corroborates previous studies that show primary relations between extent change and surface area. We also find, however, that the strength and sign of these relations varied for different epochs.

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Glacier change and contribution to streamflow in the Canoe Basin, British Columbia, 1948-2005.

Cited by 3 publications

References 65 publications

Glacier change in the Cariboo Mountains, British Columbia, Canada (1952–2005)

Glacier change in the Cariboo Mountains, British Columbia, Canada (1952–2005)

Glacier change in the Cariboo Mountains of British Columbia, Canada (1946 -- 2011).

Glacier change in the Cariboo Mountains, British Columbia, Canada (1952–2005)

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