Abstract
Antarctic atmospheric rivers (ARs) are a form of extreme weather that transport heat and moisture from the Southern Hemisphere subtropics and/or mid-latitudes to the Antarctic continent. Present-day AR events generally have a positive influence on the Antarctic ice-sheet mass balance by producing heavy snowfall, yet they also cause melt of sea ice and coastal ice sheet areas, as well as ice shelf destabilization. In this Review, we explore the atmospheric dynamics and impacts of Antarctic ARs over their life cycle to better understand their net contributions to ice-sheet mass balance. ARs occur in high-amplitude pressure couplets, and those strong enough to reach the Antarctic are often formed within Rossby waves initiated by tropical convection. Antarctic ARs are rare events (~3 days per year per location) but have been responsible for 50–70% of extreme snowfall events in East Antarctica since the 1980s. However, they can also trigger extensive surface melting events, such as the final ice shelf collapse of Larsen A in 1995 and Larsen B in 2002. Climate change will likely cause stronger ARs as anthropogenic warming increases atmospheric water vapour. Future research must determine how these climate change impacts will alter the relationship among Antarctic ARs, net ice-sheet mass balance and future sea-level rise.
| Original language | English |
|---|---|
| Article number | e2020JD033788 |
| Pages (from-to) | 178-192 |
| Number of pages | 15 |
| Journal | Nature Reviews Earth and Environment |
| Volume | 6 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 11 2025 |
Funding
J.D.W. acknowledges support from the Horizon 2020 project nextGEMS under grant agreement number 101003470. K.S.M. acknowledges support from the Polar Radiant Energy in the Far InfraRed Experiment (PREFIRE) mission, NASA grant 80NSSC18K1485. X.Z. acknowledges support from NSF Grants 2229392. Y.M. was supported by the NASA Future Investigators in NASA Earth and Space Science and Technology programme (award number 80NSSC24K0012). J.E.B. was supported by the National Science Foundation for Long Term Ecological Research number OPP-2224760. C.A.S. acknowledges support by the Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the US Department of Energy's Office of Biological & Environmental Research (BER) under Award Number DE-SC0022070, as well as National Center for Atmospheric Research, sponsored by NSF, under Cooperative Agreement Number 1852977. K.R.C. acknowledges support from the Royal Society of New Zealand Marsden Fund grant MFP-VUW2010. G.L. was supported by the National Defense Science and Engineering Graduate (NDSEG) Fellowship programme. A.C.W. and R.B. acknowledge financial support from the University of Colorado Boulder. M.L.M. acknowledges support from NASA grant 80NSSC21K1610 and the University of Colorado Boulder. I.V.G. thanks the support by the strategic funding to CIIMAR (UIDB/04423/2020 and UIDP/04423/2020), 2021.03140.CEECIND, projects ATLACE (CIRCNA/CAC/0273/2019), MAPS (2022.09201.PTDC) and Portuguese Polar Program (PROPOLAR) through national funds provided by FCT (Fundac & atilde;o para a Ciencia e a Tecnologia). D.B. acknowledges support from ANID-FONDECYT-1240190, ANID-FONDAP-1523A0002 and COPAS COASTAL ANID FB210021. A.C. and S.K. acknowledge funding support from the Ukrainian State Special-Purpose Research Program in Antarctica for 2011-2022, research direction: Hydrometeorology; and they express their gratitude to their Ukrainian polar science coworkers known as the 'Squad of Combat Penguins'.
| Funders | Funder number |
|---|---|
| Horizon 2020 project nextGEMS | |
| Polar Radiant Energy in the Far InfraRed Experiment (PREFIRE) mission, NASA | |
| NSF | |
| NASA Future Investigators in NASA Earth and Space Science and Technology programme | |
| National Science Foundation for Long Term Ecological Research | |
| Regional and Global Model Analysis (RGMA) component of the Earth and Environmental System Modeling Program of the US Department of Energy's Office of Biological & Environmental Research (BER) | |
| National Center for Atmospheric Research - NSF | 1852977 |
| Royal Society of New Zealand Marsden Fund | MFP-VUW2010 |
| National Defense Science and Engineering Graduate (NDSEG) Fellowship programme | |
| Ukrainian State Special-Purpose Research Program in Antarctica | |
| University of Colorado Boulder | |
| NASA | 80NSSC21K1610 |
| FCT (Fundaco para a Ciencia e a Tecnologia) | UIDB/04423/2020, UIDP/04423/2020, 2021.03140.CEECIND, CIRCNA/CAC/0273/2019, 2022.09201.PTDC |
| ANID-FONDECYT | 1240190, 1523A0002 |
| COPAS COASTAL ANID | FB210021 |
| ???publication-publication-funding-organisation-not-added??? | 101003470 |
| ???publication-publication-funding-organisation-not-added??? | 80NSSC18K1485 |
| ???publication-publication-funding-organisation-not-added??? | 2229392 |
| ???publication-publication-funding-organisation-not-added??? | 80NSSC24K0012 |
| ???publication-publication-funding-organisation-not-added??? | OPP-2224760 |
| ???publication-publication-funding-organisation-not-added??? | DE-SC0022070 |
Keywords
- Surface mass-balance
- Ice shelves
- Extratropical cyclones
- Snow accumulation
- African rainfall
- Air-temperature
- Sea-ice
- Dome c
- Climate
- Scale
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