On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1
A doubling of the atmospheric CO 2 content leads to global warming that is amplified in the polar regions. The CO 2 forcing also leads to a change of the atmospheric energy transport. This transport change affects the local warming induced by the CO 2 forcing. Using the Community Earth System Model...
Published in: | Journal of Climate |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Meteorological Society
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/17425 https://doi.org/10.1175/JCLI-D-18-0546.1 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/17425 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/17425 2023-05-15T13:11:35+02:00 On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 Graversen, Rune Langen, Peter L. 2019-06-12 https://hdl.handle.net/10037/17425 https://doi.org/10.1175/JCLI-D-18-0546.1 eng eng American Meteorological Society Journal of Climate Notur/NorStore: NN9348K Norges forskningsråd: 280727 Notur/NorStore: NS9063K info:eu-repo/grantAgreement/RCN/KLIMAFORSK/280727/Norway/The role of the atmospheric energy transport in recent Arctic climate change// Graversen R, Langen PL. On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1. Journal of Climate. 2019;32(13):3941-3956 FRIDAID 1715802 doi:10.1175/JCLI-D-18-0546.1 0894-8755 1520-0442 https://hdl.handle.net/10037/17425 openAccess Copyright 2019 The Author(s) VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2019 ftunivtroemsoe https://doi.org/10.1175/JCLI-D-18-0546.1 2021-06-25T17:57:15Z A doubling of the atmospheric CO 2 content leads to global warming that is amplified in the polar regions. The CO 2 forcing also leads to a change of the atmospheric energy transport. This transport change affects the local warming induced by the CO 2 forcing. Using the Community Earth System Model (CESM), the direct response to the transport change is investigated. Divergences of the transport change associated with a CO 2 doubling are implemented as a forcing in the 1 × CO 2 preindustrial control climate. This forcing is zero in the global mean. In response to a CO 2 increase in CESM, the northward atmospheric energy transport decreases at the Arctic boundary. However, the transport change still leads to a warming of the Arctic. This is due to a shift between dry static and latent transport components, so that although the dry static transport decreases, the latent transport increases at the Arctic boundary, which is consistent with other model studies. Because of a greenhouse effect associated with the latent transport, the cooling caused by a change of the dry static component is more than compensated for by the warming induced by the change of the latent transport. Similar results are found for the Antarctic region, but the transport change is larger in the Southern Hemisphere than in its northern counterpart. As a consequence, the Antarctic region warms to the extent that this warming leads to global warming that is likely enhanced by the surface albedo feedback associated with considerable ice retreat in the Southern Hemisphere. Article in Journal/Newspaper albedo Antarc* Antarctic Arctic Arctic Global warming University of Tromsø: Munin Open Research Archive Antarctic Arctic The Antarctic Journal of Climate 32 13 3941 3956 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 |
spellingShingle |
VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 Graversen, Rune Langen, Peter L. On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 |
topic_facet |
VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 |
description |
A doubling of the atmospheric CO 2 content leads to global warming that is amplified in the polar regions. The CO 2 forcing also leads to a change of the atmospheric energy transport. This transport change affects the local warming induced by the CO 2 forcing. Using the Community Earth System Model (CESM), the direct response to the transport change is investigated. Divergences of the transport change associated with a CO 2 doubling are implemented as a forcing in the 1 × CO 2 preindustrial control climate. This forcing is zero in the global mean. In response to a CO 2 increase in CESM, the northward atmospheric energy transport decreases at the Arctic boundary. However, the transport change still leads to a warming of the Arctic. This is due to a shift between dry static and latent transport components, so that although the dry static transport decreases, the latent transport increases at the Arctic boundary, which is consistent with other model studies. Because of a greenhouse effect associated with the latent transport, the cooling caused by a change of the dry static component is more than compensated for by the warming induced by the change of the latent transport. Similar results are found for the Antarctic region, but the transport change is larger in the Southern Hemisphere than in its northern counterpart. As a consequence, the Antarctic region warms to the extent that this warming leads to global warming that is likely enhanced by the surface albedo feedback associated with considerable ice retreat in the Southern Hemisphere. |
format |
Article in Journal/Newspaper |
author |
Graversen, Rune Langen, Peter L. |
author_facet |
Graversen, Rune Langen, Peter L. |
author_sort |
Graversen, Rune |
title |
On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 |
title_short |
On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 |
title_full |
On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 |
title_fullStr |
On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 |
title_full_unstemmed |
On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1 |
title_sort |
on the role of the atmospheric energy transport in 2xco2-induced polar amplification in cesm1 |
publisher |
American Meteorological Society |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/17425 https://doi.org/10.1175/JCLI-D-18-0546.1 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
albedo Antarc* Antarctic Arctic Arctic Global warming |
genre_facet |
albedo Antarc* Antarctic Arctic Arctic Global warming |
op_relation |
Journal of Climate Notur/NorStore: NN9348K Norges forskningsråd: 280727 Notur/NorStore: NS9063K info:eu-repo/grantAgreement/RCN/KLIMAFORSK/280727/Norway/The role of the atmospheric energy transport in recent Arctic climate change// Graversen R, Langen PL. On the Role of the Atmospheric Energy Transport in 2xCO2-Induced Polar Amplification in CESM1. Journal of Climate. 2019;32(13):3941-3956 FRIDAID 1715802 doi:10.1175/JCLI-D-18-0546.1 0894-8755 1520-0442 https://hdl.handle.net/10037/17425 |
op_rights |
openAccess Copyright 2019 The Author(s) |
op_doi |
https://doi.org/10.1175/JCLI-D-18-0546.1 |
container_title |
Journal of Climate |
container_volume |
32 |
container_issue |
13 |
container_start_page |
3941 |
op_container_end_page |
3956 |
_version_ |
1766248070698237952 |