Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon
Rapid melting of Arctic ice presents a significant positive forcing on the global climate system, highlighting the need to understand the forces determining melting rates. Black carbon (BC) deposition on Arctic snow and ice decreases surface albedo and increases surface and atmospheric warming, acce...
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ftncar:oai:drupal-site.org:manuscripts_608 2023-10-09T21:44:16+02:00 Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon Connolly-Brown, Eowyn (author) Lamarque, Jean-Francois (contributor) Markel, Rob (contributor) 2010-08-04 application/pdf http://nldr.library.ucar.edu/repository/collections/SOARS-000-000-000-203 https://doi.org/10.5065/a1ht-qz74 en eng SOARS Earth, Wind, Sea, and Sky: Protégé Abstracts 2010--10.5065/jqeq-np75 http://nldr.library.ucar.edu/repository/collections/SOARS-000-000-000-203 ark:/85065/d7xs5t8v doi:10.5065/a1ht-qz74 Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Text manuscript 2010 ftncar https://doi.org/10.5065/a1ht-qz74 2023-09-11T18:18:23Z Rapid melting of Arctic ice presents a significant positive forcing on the global climate system, highlighting the need to understand the forces determining melting rates. Black carbon (BC) deposition on Arctic snow and ice decreases surface albedo and increases surface and atmospheric warming, accelerating ice melt. BC is transported to the Arctic from the mid-latitudes, with Europe and Asia primary winter sources and Siberian biomass burning a large summertime contributor. Studies have found a relationship between the North Atlantic Oscillation (NAO) and northward BC transport, indicating more BC reaches the Arctic during the positive NAO phase. This study revisits this hypothesis and explores the role of the Pacific Decadal Oscillation (PDO) in Arctic BC deposition. New research suggests the PDO and NAO are more closely related than previously believed. To explore the relationship between PDO, NAO and Arctic BC, a transient historical (1850-2008) simulation has been generated using the CAM-Chem model. Two distinct PDO regimes, PDO+ and PDO-, were analyzed in conjunction with the NAO. Results indicate the PDO has a minor individual impact on BC, but the phase modulates the relative NAO role in BC transport and deposition. The PDO generated positive reinforcement in horizontal and vertical winds and precipitable water lead to changes in Arctic BC transport, precipitation, and wet deposition rates, and the responses demonstrate strong seasonality with winter and spring dominance. The results suggest transport pathway dependence on the relative signs of the NAO and PDO, but further study using explicit tracers is necessary for confirmation. Manuscript albedo Arctic black carbon North Atlantic North Atlantic oscillation OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Pacific |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Rapid melting of Arctic ice presents a significant positive forcing on the global climate system, highlighting the need to understand the forces determining melting rates. Black carbon (BC) deposition on Arctic snow and ice decreases surface albedo and increases surface and atmospheric warming, accelerating ice melt. BC is transported to the Arctic from the mid-latitudes, with Europe and Asia primary winter sources and Siberian biomass burning a large summertime contributor. Studies have found a relationship between the North Atlantic Oscillation (NAO) and northward BC transport, indicating more BC reaches the Arctic during the positive NAO phase. This study revisits this hypothesis and explores the role of the Pacific Decadal Oscillation (PDO) in Arctic BC deposition. New research suggests the PDO and NAO are more closely related than previously believed. To explore the relationship between PDO, NAO and Arctic BC, a transient historical (1850-2008) simulation has been generated using the CAM-Chem model. Two distinct PDO regimes, PDO+ and PDO-, were analyzed in conjunction with the NAO. Results indicate the PDO has a minor individual impact on BC, but the phase modulates the relative NAO role in BC transport and deposition. The PDO generated positive reinforcement in horizontal and vertical winds and precipitable water lead to changes in Arctic BC transport, precipitation, and wet deposition rates, and the responses demonstrate strong seasonality with winter and spring dominance. The results suggest transport pathway dependence on the relative signs of the NAO and PDO, but further study using explicit tracers is necessary for confirmation. |
author2 |
Connolly-Brown, Eowyn (author) Lamarque, Jean-Francois (contributor) Markel, Rob (contributor) |
format |
Manuscript |
title |
Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
spellingShingle |
Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
title_short |
Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
title_full |
Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
title_fullStr |
Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
title_full_unstemmed |
Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
title_sort |
interactions between the pacific decadal oscillation, north atlantic oscillation, and arctic black carbon |
publishDate |
2010 |
url |
http://nldr.library.ucar.edu/repository/collections/SOARS-000-000-000-203 https://doi.org/10.5065/a1ht-qz74 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
albedo Arctic black carbon North Atlantic North Atlantic oscillation |
genre_facet |
albedo Arctic black carbon North Atlantic North Atlantic oscillation |
op_relation |
SOARS Earth, Wind, Sea, and Sky: Protégé Abstracts 2010--10.5065/jqeq-np75 http://nldr.library.ucar.edu/repository/collections/SOARS-000-000-000-203 ark:/85065/d7xs5t8v doi:10.5065/a1ht-qz74 |
op_rights |
Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.5065/a1ht-qz74 |
_version_ |
1779322125648134144 |