Testing the area–altitude balance ratio (AABR) and accumulation–area ratio (AAR) methods of calculating glacier equilibrium-line altitudes

Oien, Rachel P.; Rea, Brice R.; Spagnolo, Matteo; Barr, Iestyn D.; Bingham, Robert G.

doi:10.1017/jog.2021.100

Cited by 25 publications

(16 citation statements)

References 62 publications

(102 reference statements)

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“…The AAR method is suitable when reconstructing ELAs on small and simple glacier systems (Osmaston 2005; Oien et al . 2021). The ELA based on AAR of G1 (168±13 m a.s.l.)…”

Section: Discussionmentioning

confidence: 99%

“…Oien et al . (2021) found a very strong correlation between the calculated AABR ELA and measured zero‐net balance ELAs of modern Scandinavian glaciers, using a mean regional BR of 1.5 ( r 2 = 0.92, n = 18) (Oien et al . 2021).…”

Section: Methodsmentioning

confidence: 98%

“…(2021) found a very strong correlation between the calculated AABR ELA and measured zero‐net balance ELAs of modern Scandinavian glaciers, using a mean regional BR of 1.5 ( r 2 = 0.92, n = 18) (Oien et al . 2021). A BR of 1.5 is therefore applied to the AABR‐ELA calculations (Osmaston 2005; Rea 2009; Oien et al .…”

Section: Methodsmentioning

confidence: 99%

“…A BR of 1.5 is therefore applied to the AABR‐ELA calculations (Osmaston 2005; Rea 2009; Oien et al . 2021). The BR of glaciers depends on climatic factors such as temperature regime.…”

Section: Methodsmentioning

confidence: 99%

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Palaeoclimatic and regional implications of Older Dryas and Younger Dryas local glacier activity in the low‐Arctic valley Finnkongdalen, Andøya, northern Norway

Jansen

Dahl

Linge

et al. 2023

Boreas

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Continuous glacier margin and equilibrium‐line altitude fluctuations of a former glacier on central Andøya, northern Norway, are reconstructed during the Lateglacial based on moraines and AMS 14C‐dated sediments from the distal glacier‐fed lake Ner‐Finnkongdalsvatnet. The results indicate that a valley glacier occupied the entire valley during the Last Glacial Maximum (before 21 970±620 cal. a BP). The glacier remained large throughout the early Lateglacial until a significant glacier retreat took place about 14 300±330 cal. a BP. Major advances occurred during the Older Dryas (OD) and during the Younger Dryas (YD), while minor advances are suggested to have taken place during the Intra Allerød Cold Period and the Late Allerød Cooling. Additionally, three smaller glacier retreats/re‐advances within the YD are suggested to have taken place, the latter being the largest. The glacier re‐formations/advances during the Lateglacial are consistent with increases in temperature, and they are thus suggested to be the result of increased winter precipitation. Comparing the results with relevant glacier and sea‐surface temperature records, a south–north migration of storm tracks may have occurred between 12 100–11 810±220 cal. a BP. The high temporal resolution of local glacier activity in Finnkongdalen improves our understanding of the climate forcing of the regional glacier fluctuations of the northwestern sector of the Scandinavian Ice Sheet during the Skarpnes‐ (OD) and Tromsø‐Lyngen (YD) re‐advances.

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“…The AAR method is suitable when reconstructing ELAs on small and simple glacier systems (Osmaston 2005; Oien et al . 2021). The ELA based on AAR of G1 (168±13 m a.s.l.)…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

“…A BR of 1.5 is therefore applied to the AABR‐ELA calculations (Osmaston 2005; Rea 2009; Oien et al . 2021). The BR of glaciers depends on climatic factors such as temperature regime.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Palaeoclimatic and regional implications of Older Dryas and Younger Dryas local glacier activity in the low‐Arctic valley Finnkongdalen, Andøya, northern Norway

Jansen

Dahl

Linge

et al. 2023

Boreas

View full text Add to dashboard Cite

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“…The few direct measurements available from the Mocho Glacier (Rivera et al, 2005;Schaefer et al, 2017), situated about 115 km to the south, suggest a balance ratio of 3.2, larger than figures commonly used, such as 1.75 or 2 (Osmaston, 2005). A recent study found that a value of 1.56 represents glaciers at a global scale, although with important spread (Oien et al, 2021). Guided by these studies, we tested several ratios, opting for 2.38 as a best approximation to represent this region.…”

Section: Glacial Modelingmentioning

confidence: 96%

Chlorine-36 Surface Exposure Dating of Late Holocene Moraines and Glacial Mass Balance Modeling, Monte Sierra Nevada, South-Central Chilean Andes (38°S)

et al. 2022

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The development of robust chronologies of Neoglaciation from individual glaciers throughout the high-altitude Andes can provide fundamental knowledge of influences such as regional temperature and precipitation variability, and aid in predicting future changes in the Andean climate system. However, records of Late Holocene glaciation from the Central Chilean Andes are sparse, and often poorly constrained. Here, we present 36Cl surface exposure ages, dendrochronologic constraints, and glacial mass balance modeling simulations of Late Holocene glacier fluctuations in the Central-South Chilean Andes. A series of concentric moraine ridges were identified on Monte Sierra Nevada (38°S), where exposure dating of basaltic boulders was used to establish a chronology of ice recession. We infer that moraine abandonment of the most distal ridge in the valley commenced by ∼4.2 ka, and was followed by glacier margin retreat to an up-valley position. Exposure ages of the oldest Late Holocene boulders (∼2.5–0.8 ka) along the marginal extents of the moraine complex indicate fluctuations of the glacier terminus prior to ∼0.65 ka. A final expansion of the ice margin reoccupied the position of the 4.2 ka moraine, with abatement from the outermost composite moraine occurring by ∼0.70 ka, as constrained by tree-ring data from live Araucaria araucana trees. Finally, a series of nested moraines dating to ∼0.45–0.30 ka, formed from a pulsed ice recession during the latest Holocene when the lower reaches of the glacial snout was most likely debris mantled. A distributed temperature index model combined with a glacier flow model was used to quantify an envelope of possible climatic conditions of Late Holocene glaciation. The glacial modeling results suggest conditions were ∼1.5°C colder and 20% wetter during peak Neoglaciation relative to modern conditions. These records also suggest a near-coeval record of Late Holocene climate variability between the middle and high southern latitudes. Furthermore, this study presents some of the youngest 36Cl exposure ages reported for moraines in the Andes, further supporting this method as a valuable geochronologic tool for assessing Late Holocene landscape development.

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The impact of local topoclimatic factors on marginal Pleistocene glaciation in the Northern Romanian Carpathians

Kłapyta

Mîndrescu

Zasadni

2022

CATENA

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Testing the area–altitude balance ratio (AABR) and accumulation–area ratio (AAR) methods of calculating glacier equilibrium-line altitudes

Cited by 25 publications

References 62 publications

Palaeoclimatic and regional implications of Older Dryas and Younger Dryas local glacier activity in the low‐Arctic valley Finnkongdalen, Andøya, northern Norway

Palaeoclimatic and regional implications of Older Dryas and Younger Dryas local glacier activity in the low‐Arctic valley Finnkongdalen, Andøya, northern Norway

Chlorine-36 Surface Exposure Dating of Late Holocene Moraines and Glacial Mass Balance Modeling, Monte Sierra Nevada, South-Central Chilean Andes (38°S)

The impact of local topoclimatic factors on marginal Pleistocene glaciation in the Northern Romanian Carpathians

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