Contrasting glacier responses to recent climate change in high-mountain Asia

• Published in: Scientific reports Vol. 7; no. 1; pp. 13717 - 8
• Main Authors: Sakai, Akiko, Fujita, Koji
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 20.10.2017; Nature Publishing Group
• Subjects: 704/106/125; 704/172/4081; Climate change; Glaciers; Heterogeneity; Humanities and Social Sciences; multidisciplinary; Science; Science (multidisciplinary); Spatial heterogeneity; Asia
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-017-14256-5

Recent studies of Asian glaciers have shown that glaciers in eastern Karakoram and West Kunlun have been slightly gaining mass while those in nearby Jammu Kashmir and Himalayas are losing mass, at rates of more than 0.5 m w.e.yr −1 and about 0.3 m w.e.yr −1 , respectively. Two possible explanations have been proposed for this difference in glacier behaviour: spatial heterogeneity in climate change (climatic forcing) or differing glacier responses to climate change (glacier response). However, neither explanation has strong supporting evidence. Here, we examine the glacial response by calculating the mass-balance sensitivity to temperature change in high-mountain Asia. In support of the glacier-response explanation, we find a strong correlation between observed glacier surface-elevation changes and mass-balance sensitivity of glaciers. The high coefficient of determination (R 2  = 0.61) suggests that spatially heterogeneous mass-balance sensitivity has more explanatory power than regionally different climate change for the recent contrasting glacier fluctuations in the high mountain Asia.