Icy thermometers: Quantifying the impact of volcanic heat on glacier elevation
Icy thermometers: Quantifying the impact of volcanic heat on glacier elevation
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冰温度计：量化火山热量对冰川海拔的影响
作者：
Howcutt S
我们提出了一个大陆范围内的研究600冰川位于和附近的37个冰覆盖的火山在南美洲。结果表明冰川对火山热的敏感性。我们区分了“火山冰川”（距离火山中心≤1 km;n= 74）和“近端冰川”（1-15 km;n= 526），并计算了它们的平衡线高度（ELA）。对于每一个冰覆盖的火山，我们比较了火山冰川的ELA与邻近冰川的ELA，这表明前者的ELA高于后者的ELA。ΔELAmean定义为火山冰川的平均ELA与邻近冰川的平均ELA之间的偏移量，计算了每个冰盖火山的ELAmean。在37座火山中，Δ ELA平均值为正的火山占92%，并建立了Δ ELA平均值与火山热异常的定量关系。结果突出了火山热量对冰川海拔的影响;强调需要将火山上或附近的冰川排除在冰川气候调查之外;并证明冰川作为“火山温度计”的一阶潜力。火山冰川监测有助于我们了解岩浆和热活动，冰川几何形状的变化可能反映火山热量和动荡的长期波动。
We present a continentwide study of 600 glaciers located on and near 37 ice-clad volcanoes in South America. Results demonstrate glacier sensitivity to volcanic heat. We distinguished between “volcanic glaciers” (≤1 km from volcanic centers;n= 74), and “proximal glaciers” (1–15 km;n= 526) and calculated their equilibrium line altitudes (ELAs). For each ice-clad volcano, we compared the ELAs of its volcanic glaciers to those of its proximal glaciers, which showed that the ELAs of the former are higher than the ELAs of the latter. ΔELAmean, defined as the offset between the mean ELA of the volcanic glaciers compared with that of the proximal glaciers, was calculated for each ice-clad volcano. ΔELAmeanwas positive for 92% of the 37 volcanoes, and a quantitative relationship between ΔELAmeanand volcanic thermal anomaly was established. Results highlight the impact of volcanic heat on glacier elevation; emphasize the need to exclude glaciers on, or near, volcanoes from glacier-climate investigations; and demonstrate the first-order potential for glaciers as “volcanic thermometers.” Volcanic-glacier monitoring could contribute to our understanding of magmatic and thermal activity, with changes in glacier geometries potentially reflecting long-term fluctuations in volcanic heat and unrest.
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未来冰川火山活动的全球测绘
DOI：
--
发表时间：
2020
期刊：
影响因子：
--
作者：
B. Edwards;W. Kochtitzky;S. Battersby
通讯作者：
S. Battersby
火山活动及相关危害：安第斯山脉的视角
影响因子：
--
作者：
R. Tilling
通讯作者：
R. Tilling
冰岛冰川非表面质量平衡
影响因子：
3.4
作者：
T. Jóhannesson;B. Pálmason;Á. Hjartarson;A. Jarosch;E. Magnússon;J. M. Belart;M. Gudmundsson
通讯作者：
M. Gudmundsson
DOI：
10.1002/joc.5086
发表时间：
2017-10-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Fick, Stephen E.;Hijmans, Robert J.
通讯作者：
Hijmans, Robert J.
影响因子：
3.4
作者：
Johannes Reinthaler;F. Paul;H. D. Granados;A. Rivera;C. Huggel
通讯作者：
Johannes Reinthaler;F. Paul;H. D. Granados;A. Rivera;C. Huggel