2019
DOI: 10.5194/tc-13-879-2019
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The impact of model resolution on the simulated Holocene retreat of the southwestern Greenland ice sheet using the Ice Sheet System Model (ISSM)

Abstract: Abstract. Geologic archives constraining the variability of the Greenland ice sheet (GrIS) during the Holocene provide targets for ice sheet models to test sensitivities to variations in past climate and model formulation. Even as data–model comparisons are becoming more common, many models simulating the behavior of the GrIS during the past rely on meshes with coarse horizontal resolutions (≥10 km). In this study, we explore the impact of model resolution on the simulated nature of retreat across southwestern… Show more

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Cited by 33 publications
(41 citation statements)
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“…We focused these efforts specifically on the Kangerlussuaq region, rather than the broader southwestern GrIS, for several reasons. First, in ice sheet regions dominated by surface mass balance (Cuzzone et al, 2019;Sole et al, 2008), the rate of ice margin change is related to climate forcing on centennial-to-millennial timescales (Kelley et al, 2015). The retreat history of land-based GrIS sectors, such as the Kangerlussuaq region, can therefore provide insight into climatic conditions over the Holocene.…”
Section: Methodsmentioning
confidence: 99%
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“…We focused these efforts specifically on the Kangerlussuaq region, rather than the broader southwestern GrIS, for several reasons. First, in ice sheet regions dominated by surface mass balance (Cuzzone et al, 2019;Sole et al, 2008), the rate of ice margin change is related to climate forcing on centennial-to-millennial timescales (Kelley et al, 2015). The retreat history of land-based GrIS sectors, such as the Kangerlussuaq region, can therefore provide insight into climatic conditions over the Holocene.…”
Section: Methodsmentioning
confidence: 99%
“…Model simulations suggest that the principal control on mass balance in land-based ice sheet areas in southwest Greenland is summer temperature (Cuzzone et al, 2019;Schlegel et al, 2016). Low levels of winter precipitation may also contribute to fast ice recession and, conversely, increased snowfall during periods of warmth has been hypothesized to partially offset temperature-driven mass loss (Thomas et al, 2016).…”
Section: Geophysical Research Lettersmentioning
confidence: 99%
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“…Previous modeling studies indicate that retreat in land-terminating sectors of the GrIS were dominated by surface mass balance rather than ice dynamics (Cuzzone et al, 2019;Lecavalier et al, 2014). Thus, uncertainty in Holocene climate and thus surface mass balance is likely the primary cause of discrepancies between modeled and observed terminus positions.…”
Section: Data Assimilation Approachmentioning
confidence: 98%
“…Previous modeling studies indicate that retreat in land terminating regions of the GrIS were controlled primarily by surface mass balance rather than ice dynamics (Cuzzone et al, 2019;Lecavalier et al, 2014). Enhanced precipitation may have stabilized the ice sheet during the HTM by increasing overall surface mass balance due to elevated winter snowfall (Thomas et al, 2016), or accelerated retreat due to the presence of more surface water in summer.…”
Section: Introductionmentioning
confidence: 99%