5 New Studies: High Mountain Asia Glaciers Are Advancing, Surging…And This Is A ‘Natural Phenomenon’

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5 New Studies: High Mountain Asia Glaciers Are Advancing, Surging…And This Is A ‘Natural Phenomenon’

By Kenneth Richard on 30. April 2020
 
Glacier surges of 100s of meters within mere months have been occurring throughout High Mountain Asia (the Karakoram region, especially) for decades, even centuries. It’s the Karakoram “anomaly”, and it’s thought to be “natural”. So why are the regions where glaciers are retreating thought to be responding to unnatural climate changes?

The advancing glaciers of High Mountain Asia (HMA)

1. A Pakistan glacier advanced 860 meters in 6 months during 2018/19.

Rashid et al., 2020

“The January 2018 to September 2019 surge of Shisper Glacier, Pakistan, detected from remote sensing observations … The glacier surface velocity profiles indicate that the ablation zone of the glacier continues to be in an active surge phase resulting in advance of the snout and expansion of the ice-dammed lake. Surface glacier velocities are as high as 48 m d−1. Between 18 December 2018 and 8 May 2019, the glacier snout advanced at ~6 m d−1 with a total overall advance of 860 m. The lake formed due to damming of an outflow stream from Mochowar Glacier expanded to its maximum area (29.69 ha) in May 2019 before drainage started on 23 June 2019.”

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