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Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya. / Rowan, Ann V.; Nicholson, Lindsey I.; Quincey, Duncan J.; Gibson, Morgan J.; Irvine-Fynn, Tristram D.L.; Watson, C. Scott; Wagnon, Patrick; Rounce, David R.; Thompson, Sarah S.; Porter, Philip R.; Glasser, Neil F.

In: Journal of Glaciology, Vol. TBC, No. TBC, JOG-20-0102.R1, 03.12.2020, p. 1-12.

Research output: Contribution to journalArticlepeer-review

Harvard

Rowan, AV, Nicholson, LI, Quincey, DJ, Gibson, MJ, Irvine-Fynn, TDL, Watson, CS, Wagnon, P, Rounce, DR, Thompson, SS, Porter, PR & Glasser, NF 2020, 'Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya', Journal of Glaciology, vol. TBC, no. TBC, JOG-20-0102.R1, pp. 1-12. https://doi.org/10.1017/jog.2020.100

APA

Rowan, A. V., Nicholson, L. I., Quincey, D. J., Gibson, M. J., Irvine-Fynn, T. D. L., Watson, C. S., Wagnon, P., Rounce, D. R., Thompson, S. S., Porter, P. R., & Glasser, N. F. (2020). Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya. Journal of Glaciology, TBC(TBC), 1-12. [JOG-20-0102.R1]. https://doi.org/10.1017/jog.2020.100

Vancouver

Rowan AV, Nicholson LI, Quincey DJ, Gibson MJ, Irvine-Fynn TDL, Watson CS et al. Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya. Journal of Glaciology. 2020 Dec 3;TBC(TBC):1-12. JOG-20-0102.R1. https://doi.org/10.1017/jog.2020.100

Author

Rowan, Ann V. ; Nicholson, Lindsey I. ; Quincey, Duncan J. ; Gibson, Morgan J. ; Irvine-Fynn, Tristram D.L. ; Watson, C. Scott ; Wagnon, Patrick ; Rounce, David R. ; Thompson, Sarah S. ; Porter, Philip R. ; Glasser, Neil F. / Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya. In: Journal of Glaciology. 2020 ; Vol. TBC, No. TBC. pp. 1-12.

Bibtex

@article{dc4f42fa8c8b49448c77fa10d6a3f376,
title = "Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya",
abstract = "Rock debris covers about 30% of glacier ablation areas in the Central Himalaya and modifies the impact of atmospheric conditions on mass balance. The thermal properties of supraglacial debris are diurnally variable but remain poorly constrained for monsoon-influenced glaciers over the timescale of the ablation season. We measured vertical debris profile temperatures at 12 sites on four glaciers in the Everest region with debris thickness ranging from 0.08–2.8 m. Typically, the length of the ice ablation season beneath supraglacial debris was 160 days (15 May to 22 October)—a month longer than the monsoon season. Debris temperature gradients were approximately linear (r2 > 0.83), measured as –40°C m–1 where debris was up to 0.1 m thick, –20°C m–1 for debris 0.1–0.5 m thick, and –4°C m–1 for debris greater than 0.5 m thick. Our results demonstrate that the influence of supraglacial debris on the temperature of the underlying ice surface, and therefore melt, is stable at a seasonal timescale and can be estimated from near-surface temperature. These results have the potential to greatly improve the representation of ablation in calculations of debris-covered glacier mass balance and projections of their response to climate change.",
keywords = "N/A",
author = "Rowan, {Ann V.} and Nicholson, {Lindsey I.} and Quincey, {Duncan J.} and Gibson, {Morgan J.} and Irvine-Fynn, {Tristram D.L.} and Watson, {C. Scott} and Patrick Wagnon and Rounce, {David R.} and Thompson, {Sarah S.} and Porter, {Philip R.} and Glasser, {Neil F.}",
year = "2020",
month = dec,
day = "3",
doi = "10.1017/jog.2020.100",
language = "English",
volume = "TBC",
pages = "1--12",
journal = "Journal of Glaciology",
issn = "0022-1430",
publisher = "International Glaciology Society",
number = "TBC",

}

RIS

TY - JOUR

T1 - Seasonally stable temperature gradients through supraglacial debris in the Everest region of Nepal, Central Himalaya

AU - Rowan, Ann V.

AU - Nicholson, Lindsey I.

AU - Quincey, Duncan J.

AU - Gibson, Morgan J.

AU - Irvine-Fynn, Tristram D.L.

AU - Watson, C. Scott

AU - Wagnon, Patrick

AU - Rounce, David R.

AU - Thompson, Sarah S.

AU - Porter, Philip R.

AU - Glasser, Neil F.

PY - 2020/12/3

Y1 - 2020/12/3

N2 - Rock debris covers about 30% of glacier ablation areas in the Central Himalaya and modifies the impact of atmospheric conditions on mass balance. The thermal properties of supraglacial debris are diurnally variable but remain poorly constrained for monsoon-influenced glaciers over the timescale of the ablation season. We measured vertical debris profile temperatures at 12 sites on four glaciers in the Everest region with debris thickness ranging from 0.08–2.8 m. Typically, the length of the ice ablation season beneath supraglacial debris was 160 days (15 May to 22 October)—a month longer than the monsoon season. Debris temperature gradients were approximately linear (r2 > 0.83), measured as –40°C m–1 where debris was up to 0.1 m thick, –20°C m–1 for debris 0.1–0.5 m thick, and –4°C m–1 for debris greater than 0.5 m thick. Our results demonstrate that the influence of supraglacial debris on the temperature of the underlying ice surface, and therefore melt, is stable at a seasonal timescale and can be estimated from near-surface temperature. These results have the potential to greatly improve the representation of ablation in calculations of debris-covered glacier mass balance and projections of their response to climate change.

AB - Rock debris covers about 30% of glacier ablation areas in the Central Himalaya and modifies the impact of atmospheric conditions on mass balance. The thermal properties of supraglacial debris are diurnally variable but remain poorly constrained for monsoon-influenced glaciers over the timescale of the ablation season. We measured vertical debris profile temperatures at 12 sites on four glaciers in the Everest region with debris thickness ranging from 0.08–2.8 m. Typically, the length of the ice ablation season beneath supraglacial debris was 160 days (15 May to 22 October)—a month longer than the monsoon season. Debris temperature gradients were approximately linear (r2 > 0.83), measured as –40°C m–1 where debris was up to 0.1 m thick, –20°C m–1 for debris 0.1–0.5 m thick, and –4°C m–1 for debris greater than 0.5 m thick. Our results demonstrate that the influence of supraglacial debris on the temperature of the underlying ice surface, and therefore melt, is stable at a seasonal timescale and can be estimated from near-surface temperature. These results have the potential to greatly improve the representation of ablation in calculations of debris-covered glacier mass balance and projections of their response to climate change.

KW - N/A

U2 - 10.1017/jog.2020.100

DO - 10.1017/jog.2020.100

M3 - Article

VL - TBC

SP - 1

EP - 12

JO - Journal of Glaciology

JF - Journal of Glaciology

SN - 0022-1430

IS - TBC

M1 - JOG-20-0102.R1

ER -