Topál, Dániel and Ding, Qinghua and Ballinger, Thomas J. and Hanna, Edward and Fettweis, Xavier and Li, Zhe and Pieczka, Ildikó (2022) Discrepancies between observations and climate models of large-scale wind-driven Greenland melt influence sea-level rise projections. NATURE COMMUNICATIONS, 13. No. 6833. ISSN 2041-1723
|
Text
TopalDetal_NaturComm_2022.pdf Available under License Creative Commons Attribution. Download (4MB) | Preview |
Abstract
While climate models project that Greenland ice sheet (GrIS) melt will continue to accelerate with climate change, models exhibit limitations in capturing observed connections between GrIS melt and changes in high-latitude atmospheric circulation. Here we impose observed Arctic winds in a fully-coupled climate model with fixed anthropogenic forcing to quantify the influence of the rotational component of large-scale atmospheric circulation variability over the Arctic on the temperature field and the surface mass/energy balances through adiabatic processes. We show that recent changes involving mid-to-upper-tropospheric anticyclonic wind anomalies – linked with tropical forcing – explain half of the observed Greenland surface warming and ice loss acceleration since 1990, suggesting a pathway for large-scale winds to potentially enhance sea-level rise by ~0.2 mm/year per decade. We further reveal fingerprints of this observed teleconnection in paleo-reanalyses spanning the past 400 years, which heightens concern about model limitations to capture wind-driven adiabatic processes associated with GrIS melt.
Item Type: | Article |
---|---|
Subjects: | G Geography. Anthropology. Recreation / földrajz, antropológia, kikapcsolódás > GE Environmental Sciences / környezettudomány |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 27 Mar 2023 08:05 |
Last Modified: | 27 Mar 2023 08:05 |
URI: | http://real.mtak.hu/id/eprint/162806 |
Actions (login required)
![]() |
Edit Item |