North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America
Atmospheric rivers (ARs) bring concentrated rainfall and flooding to the western United States (US) and are hypothesized to have supported sustained hydroclimatic changes in the past. However, their ephemeral nature makes it challenging to document ARs in climate models and estimate their contributi...
Published in: | Science Advances |
---|---|
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://doi.org/10.1126/sciadv.adj2225 |
id |
ftncar:oai:drupal-site.org:articles_26975 |
---|---|
record_format |
openpolar |
spelling |
ftncar:oai:drupal-site.org:articles_26975 2024-04-07T07:54:15+00:00 North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America Oster, Jessica L. (author) Macarewich, Sophia (author) Lofverstrom, Marcus (author) de Wet, Cameron (author) Montañez, Isabel (author) Lora, Juan M. (author) Skinner, Christopher (author) Tabor, Clay (author) 2023-11-17 https://doi.org/10.1126/sciadv.adj2225 en eng Science Advances--Sci. Adv.--2375-2548 articles:26975 doi:10.1126/sciadv.adj2225 ark:/85065/d7kk9gz1 Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2023 ftncar https://doi.org/10.1126/sciadv.adj2225 2024-03-14T19:35:34Z Atmospheric rivers (ARs) bring concentrated rainfall and flooding to the western United States (US) and are hypothesized to have supported sustained hydroclimatic changes in the past. However, their ephemeral nature makes it challenging to document ARs in climate models and estimate their contribution to hydroclimate changes recorded by time-averaged paleoclimate archives. We present new climate model simulations of Heinrich Stadial 1 (HS1; 16,000 years before the present), an interval characterized by widespread wetness in the western US, that demonstrate increased AR frequency and winter precipitation sourced from the southeastern North Pacific. These changes are amplified with freshwater fluxes into the North Atlantic, indicating that North Atlantic cooling associated with weakened Atlantic Meridional Overturning Circulation (AMOC) is a key driver of HS1 climate in this region. As recent observations suggest potential weakening of AMOC, our identified connection between North Atlantic climate and northeast Pacific AR activity has implications for future western US hydroclimate. 1852977 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Pacific Science Advances 9 46 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Atmospheric rivers (ARs) bring concentrated rainfall and flooding to the western United States (US) and are hypothesized to have supported sustained hydroclimatic changes in the past. However, their ephemeral nature makes it challenging to document ARs in climate models and estimate their contribution to hydroclimate changes recorded by time-averaged paleoclimate archives. We present new climate model simulations of Heinrich Stadial 1 (HS1; 16,000 years before the present), an interval characterized by widespread wetness in the western US, that demonstrate increased AR frequency and winter precipitation sourced from the southeastern North Pacific. These changes are amplified with freshwater fluxes into the North Atlantic, indicating that North Atlantic cooling associated with weakened Atlantic Meridional Overturning Circulation (AMOC) is a key driver of HS1 climate in this region. As recent observations suggest potential weakening of AMOC, our identified connection between North Atlantic climate and northeast Pacific AR activity has implications for future western US hydroclimate. 1852977 |
author2 |
Oster, Jessica L. (author) Macarewich, Sophia (author) Lofverstrom, Marcus (author) de Wet, Cameron (author) Montañez, Isabel (author) Lora, Juan M. (author) Skinner, Christopher (author) Tabor, Clay (author) |
format |
Article in Journal/Newspaper |
title |
North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America |
spellingShingle |
North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America |
title_short |
North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America |
title_full |
North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America |
title_fullStr |
North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America |
title_full_unstemmed |
North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America |
title_sort |
north atlantic meltwater during heinrich stadial 1 drives wetter climate with more atmospheric rivers in western north america |
publishDate |
2023 |
url |
https://doi.org/10.1126/sciadv.adj2225 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Science Advances--Sci. Adv.--2375-2548 articles:26975 doi:10.1126/sciadv.adj2225 ark:/85065/d7kk9gz1 |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1126/sciadv.adj2225 |
container_title |
Science Advances |
container_volume |
9 |
container_issue |
46 |
_version_ |
1795670651622653952 |