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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ftdatacite:10.5065/a1ht-qz74 2023-05-15T13:11:01+02:00 Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon Connolly-Brown, Eowyn Lamarque, Jean-Francois Markel, Rob 2010 https://dx.doi.org/10.5065/a1ht-qz74 https://opensky.ucar.edu/islandora/object/manuscripts:608 unknown University Corporation For Atmospheric Research (UCAR) manuscript Text article-journal ScholarlyArticle 2010 ftdatacite https://doi.org/10.5065/a1ht-qz74 2021-11-05T12:55:41Z 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. Text albedo Arctic black carbon North Atlantic North Atlantic oscillation DataCite Metadata Store (German National Library of Science and Technology) Arctic Pacific |
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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. |
format |
Text |
author |
Connolly-Brown, Eowyn Lamarque, Jean-Francois Markel, Rob |
spellingShingle |
Connolly-Brown, Eowyn Lamarque, Jean-Francois Markel, Rob Interactions between the Pacific decadal oscillation, North Atlantic oscillation, and arctic black carbon |
author_facet |
Connolly-Brown, Eowyn Lamarque, Jean-Francois Markel, Rob |
author_sort |
Connolly-Brown, Eowyn |
title |
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 |
publisher |
University Corporation For Atmospheric Research (UCAR) |
publishDate |
2010 |
url |
https://dx.doi.org/10.5065/a1ht-qz74 https://opensky.ucar.edu/islandora/object/manuscripts:608 |
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_doi |
https://doi.org/10.5065/a1ht-qz74 |
_version_ |
1766245643592925184 |