Abstract / Description of output
Extreme melt and rainfall events can induce temporary acceleration of Greenland Ice Sheet motion, leading to increased advection of ice to lower elevations where melt rates are higher. In a warmer climate, these events are likely to become more frequent. In September 2022, seasonally unprecedented air temperatures caused multiple melt events over the Greenland Ice Sheet, generating the highest melt rates of the year. The scale and timing of the largest event overwhelmed the subglacial drainage system, enhancing basal sliding and increasing ice velocities by up to ∼240% relative to pre-event velocities. However, ice motion returned rapidly to pre-event levels, and the speed-ups caused a regional increase in annual ice discharge of only ∼2% compared to when the effects of the speed-ups were excluded. Therefore, although late melt-season events are forecast to become more frequent and drive significant runoff, their impact on net mass loss via ice discharge is minimal.
Original language | English |
---|---|
Article number | e2023GL106520 |
Journal | Geophysical Research Letters |
Volume | 51 |
Issue number | 4 |
Early online date | 14 Feb 2024 |
DOIs | |
Publication status | Published - 28 Feb 2024 |
Keywords / Materials (for Non-textual outputs)
- Greenland
- ice dynamics
- ice sheet
- subglacial hydrology
Fingerprint
Dive into the research topics of 'Minimal Impact of Late‐Season Melt Events on Greenland Ice Sheet Annual Motion'. Together they form a unique fingerprint.Press/Media
-
Greenland Ice Sheet motion minimally impacted by late-season melting, study finds
Ryan Ing, Peter Nienow & Andrew Tedstone
17/03/24
1 Media contribution
Press/Media: Research