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Potential future methane emission hot spots in Greenland

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Potential future methane emission hot spots in Greenland. / Geng, Marilena Sophie; Christensen, Jens Hesselbjerg; Christensen, Torben Rojle.

I: Environmental Research Letters, Bind 14, Nr. 3, 035001, 2019.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisLetterForskningpeer review

Harvard

Geng, MS, Christensen, JH & Christensen, TR 2019, 'Potential future methane emission hot spots in Greenland', Environmental Research Letters, bind 14, nr. 3, 035001. https://doi.org/10.1088/1748-9326/aaf34b

APA

Geng, M. S., Christensen, J. H., & Christensen, T. R. (2019). Potential future methane emission hot spots in Greenland. Environmental Research Letters, 14(3), [035001]. https://doi.org/10.1088/1748-9326/aaf34b

CBE

Geng MS, Christensen JH, Christensen TR. 2019. Potential future methane emission hot spots in Greenland. Environmental Research Letters. 14(3):Article 035001. https://doi.org/10.1088/1748-9326/aaf34b

MLA

Geng, Marilena Sophie, Jens Hesselbjerg Christensen, og Torben Rojle Christensen. "Potential future methane emission hot spots in Greenland". Environmental Research Letters. 2019. 14(3). https://doi.org/10.1088/1748-9326/aaf34b

Vancouver

Geng MS, Christensen JH, Christensen TR. Potential future methane emission hot spots in Greenland. Environmental Research Letters. 2019;14(3). 035001. https://doi.org/10.1088/1748-9326/aaf34b

Author

Geng, Marilena Sophie ; Christensen, Jens Hesselbjerg ; Christensen, Torben Rojle. / Potential future methane emission hot spots in Greenland. I: Environmental Research Letters. 2019 ; Bind 14, Nr. 3.

Bibtex

@article{2c471a72263c443789688f5aa4aa3344,
title = "Potential future methane emission hot spots in Greenland",
abstract = "Climate models have been making significant progress encompassing an increasing number of complex feedback mechanisms from natural ecosystems. Permafrost thaw and subsequent induced greenhouse gas emissions, however, remain a challenge for climate models at large. Deducing permafrost conditions and associated greenhouse gas emissions from parameters that are simulated in climate models would be a helpful step towards estimating emission budgets from permafrost regions. Here we use a regional climate model with a 5 km horizontal resolution to assess future potential methane (CH4) emissions over presently unglaciated areas in Greenland under an RCP8.5 scenario. A simple frost index is applied to estimate permafrost conditions from the model output. CH4 flux measurements from two stations in Greenland; Nuuk representing sub-Arctic and Zackenberg high-Arctic climate, are used to establish a relationship between emissions and near surface air temperature. Permafrost conditions in Greenland change drastically by the end of the 21st century in an RCP8.5 climate. Continuous permafrost remains stable only in North Greenland, the north-west coast, the northern tip of Disko Island, and Nuussuaq. Southern Greenland conditions only sustain sporadic permafrost conditions and largely at high elevations, whereas former permafrost in other regions thaws. The increasing thawed soil leads to increasing CH4 emissions. Especially the area surrounding Kangerlussuaq, Scoresby Land, and the southern coast of Greenland exhibit potentially high emissions during the longer growing season. The constructed maps and budgets combining modelled permafrost conditions with observed CH4 fluxes from CH4 promoting sites represent a useful tool to identify areas in need of additional monitoring as they highlight potential CH4 hot spots.",
keywords = "Greenland climate, climate change, permafrost, permafrost thaw, methane emissions, future emission hot spots, CLIMATE-CHANGE, PERMAFROST, TUNDRA, ICE, SIMULATION, PREDICTION, SNOW",
author = "Geng, {Marilena Sophie} and Christensen, {Jens Hesselbjerg} and Christensen, {Torben Rojle}",
year = "2019",
doi = "10.1088/1748-9326/aaf34b",
language = "English",
volume = "14",
journal = "Environmental Research Letters",
issn = "1748-9326",
publisher = "IOP Publishing",
number = "3",

}

RIS

TY - JOUR

T1 - Potential future methane emission hot spots in Greenland

AU - Geng, Marilena Sophie

AU - Christensen, Jens Hesselbjerg

AU - Christensen, Torben Rojle

PY - 2019

Y1 - 2019

N2 - Climate models have been making significant progress encompassing an increasing number of complex feedback mechanisms from natural ecosystems. Permafrost thaw and subsequent induced greenhouse gas emissions, however, remain a challenge for climate models at large. Deducing permafrost conditions and associated greenhouse gas emissions from parameters that are simulated in climate models would be a helpful step towards estimating emission budgets from permafrost regions. Here we use a regional climate model with a 5 km horizontal resolution to assess future potential methane (CH4) emissions over presently unglaciated areas in Greenland under an RCP8.5 scenario. A simple frost index is applied to estimate permafrost conditions from the model output. CH4 flux measurements from two stations in Greenland; Nuuk representing sub-Arctic and Zackenberg high-Arctic climate, are used to establish a relationship between emissions and near surface air temperature. Permafrost conditions in Greenland change drastically by the end of the 21st century in an RCP8.5 climate. Continuous permafrost remains stable only in North Greenland, the north-west coast, the northern tip of Disko Island, and Nuussuaq. Southern Greenland conditions only sustain sporadic permafrost conditions and largely at high elevations, whereas former permafrost in other regions thaws. The increasing thawed soil leads to increasing CH4 emissions. Especially the area surrounding Kangerlussuaq, Scoresby Land, and the southern coast of Greenland exhibit potentially high emissions during the longer growing season. The constructed maps and budgets combining modelled permafrost conditions with observed CH4 fluxes from CH4 promoting sites represent a useful tool to identify areas in need of additional monitoring as they highlight potential CH4 hot spots.

AB - Climate models have been making significant progress encompassing an increasing number of complex feedback mechanisms from natural ecosystems. Permafrost thaw and subsequent induced greenhouse gas emissions, however, remain a challenge for climate models at large. Deducing permafrost conditions and associated greenhouse gas emissions from parameters that are simulated in climate models would be a helpful step towards estimating emission budgets from permafrost regions. Here we use a regional climate model with a 5 km horizontal resolution to assess future potential methane (CH4) emissions over presently unglaciated areas in Greenland under an RCP8.5 scenario. A simple frost index is applied to estimate permafrost conditions from the model output. CH4 flux measurements from two stations in Greenland; Nuuk representing sub-Arctic and Zackenberg high-Arctic climate, are used to establish a relationship between emissions and near surface air temperature. Permafrost conditions in Greenland change drastically by the end of the 21st century in an RCP8.5 climate. Continuous permafrost remains stable only in North Greenland, the north-west coast, the northern tip of Disko Island, and Nuussuaq. Southern Greenland conditions only sustain sporadic permafrost conditions and largely at high elevations, whereas former permafrost in other regions thaws. The increasing thawed soil leads to increasing CH4 emissions. Especially the area surrounding Kangerlussuaq, Scoresby Land, and the southern coast of Greenland exhibit potentially high emissions during the longer growing season. The constructed maps and budgets combining modelled permafrost conditions with observed CH4 fluxes from CH4 promoting sites represent a useful tool to identify areas in need of additional monitoring as they highlight potential CH4 hot spots.

KW - Greenland climate

KW - climate change

KW - permafrost

KW - permafrost thaw

KW - methane emissions

KW - future emission hot spots

KW - CLIMATE-CHANGE

KW - PERMAFROST

KW - TUNDRA

KW - ICE

KW - SIMULATION

KW - PREDICTION

KW - SNOW

UR - http://www.scopus.com/inward/record.url?scp=85067126977&partnerID=8YFLogxK

U2 - 10.1088/1748-9326/aaf34b

DO - 10.1088/1748-9326/aaf34b

M3 - Letter

VL - 14

JO - Environmental Research Letters

JF - Environmental Research Letters

SN - 1748-9326

IS - 3

M1 - 035001

ER -