Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model
Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (C...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Schneider, David P. [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2020 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag GmbH Germany, part of Springer Nature 2020 |
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| Übergeordnetes Werk: |
Enthalten in: Climate dynamics - Springer Berlin Heidelberg, 1986, 55(2020), 5-6 vom: 08. Juli, Seite 1665-1684 |
|---|---|
| Übergeordnetes Werk: |
volume:55 ; year:2020 ; number:5-6 ; day:08 ; month:07 ; pages:1665-1684 |
| Links: |
|---|
| DOI / URN: |
10.1007/s00382-020-05346-8 |
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| Katalog-ID: |
OLC2118487800 |
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| 520 | |a Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (CESM)—improving a long-standing bias in shortwave cloud forcing over the Southern Ocean—leads to an enhanced response of precipitation when the model is forced with realistic stratospheric ozone depletion, with other radiative forcing remaining constant. We analyze two ozone-forced ensemble experiments with the CESM version 1.1: one using the standard version of the model and the other using the cloud-modified version. The standard version exhibits a precipitation increase on the AIS of 34 gigatons $ year^{−1} $; the cloud-modified version shows an increase of 109 Gt $ year^{−1} $. The cloud-modified version shows a more robust, year-round poleward shift in the westerly jet and storm tracks, which brings more precipitation to the AIS, compared to the standard version. Greater surface warming and larger-amplitude stationary waves further increase the Antarctic precipitation response. The enhanced warming in the cloud-modified version is explained by larger positive shortwave cloud feedbacks, while the enhanced poleward jet shift is associated with a stronger meridional temperature gradient in the upper troposphere—lower stratosphere. These results illustrate (1) the sensitivity of forced changes in Antarctic precipitation to the mean state of a climate model and (2) the strong role of atmospheric dynamics in driving that forced precipitation response. | ||
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10.1007/s00382-020-05346-8 doi (DE-627)OLC2118487800 (DE-He213)s00382-020-05346-8-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 16,13 ssgn Schneider, David P. verfasserin (orcid)0000-0001-5308-1834 aut Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model 2020 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (CESM)—improving a long-standing bias in shortwave cloud forcing over the Southern Ocean—leads to an enhanced response of precipitation when the model is forced with realistic stratospheric ozone depletion, with other radiative forcing remaining constant. We analyze two ozone-forced ensemble experiments with the CESM version 1.1: one using the standard version of the model and the other using the cloud-modified version. The standard version exhibits a precipitation increase on the AIS of 34 gigatons $ year^{−1} $; the cloud-modified version shows an increase of 109 Gt $ year^{−1} $. The cloud-modified version shows a more robust, year-round poleward shift in the westerly jet and storm tracks, which brings more precipitation to the AIS, compared to the standard version. Greater surface warming and larger-amplitude stationary waves further increase the Antarctic precipitation response. The enhanced warming in the cloud-modified version is explained by larger positive shortwave cloud feedbacks, while the enhanced poleward jet shift is associated with a stronger meridional temperature gradient in the upper troposphere—lower stratosphere. These results illustrate (1) the sensitivity of forced changes in Antarctic precipitation to the mean state of a climate model and (2) the strong role of atmospheric dynamics in driving that forced precipitation response. Antarctic ice sheet Precipitation Shortwave cloud feedbacks Structural uncertainty Kay, Jennifer E. aut Lenaerts, Jan aut Enthalten in Climate dynamics Springer Berlin Heidelberg, 1986 55(2020), 5-6 vom: 08. Juli, Seite 1665-1684 (DE-627)129932728 (DE-600)382992-3 (DE-576)015479005 0930-7575 nnns volume:55 year:2020 number:5-6 day:08 month:07 pages:1665-1684 https://doi.org/10.1007/s00382-020-05346-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 GBV_ILN_2018 GBV_ILN_4277 AR 55 2020 5-6 08 07 1665-1684 |
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10.1007/s00382-020-05346-8 doi (DE-627)OLC2118487800 (DE-He213)s00382-020-05346-8-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ 16,13 ssgn Schneider, David P. verfasserin (orcid)0000-0001-5308-1834 aut Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model 2020 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (CESM)—improving a long-standing bias in shortwave cloud forcing over the Southern Ocean—leads to an enhanced response of precipitation when the model is forced with realistic stratospheric ozone depletion, with other radiative forcing remaining constant. We analyze two ozone-forced ensemble experiments with the CESM version 1.1: one using the standard version of the model and the other using the cloud-modified version. The standard version exhibits a precipitation increase on the AIS of 34 gigatons $ year^{−1} $; the cloud-modified version shows an increase of 109 Gt $ year^{−1} $. The cloud-modified version shows a more robust, year-round poleward shift in the westerly jet and storm tracks, which brings more precipitation to the AIS, compared to the standard version. Greater surface warming and larger-amplitude stationary waves further increase the Antarctic precipitation response. The enhanced warming in the cloud-modified version is explained by larger positive shortwave cloud feedbacks, while the enhanced poleward jet shift is associated with a stronger meridional temperature gradient in the upper troposphere—lower stratosphere. These results illustrate (1) the sensitivity of forced changes in Antarctic precipitation to the mean state of a climate model and (2) the strong role of atmospheric dynamics in driving that forced precipitation response. Antarctic ice sheet Precipitation Shortwave cloud feedbacks Structural uncertainty Kay, Jennifer E. aut Lenaerts, Jan aut Enthalten in Climate dynamics Springer Berlin Heidelberg, 1986 55(2020), 5-6 vom: 08. Juli, Seite 1665-1684 (DE-627)129932728 (DE-600)382992-3 (DE-576)015479005 0930-7575 nnns volume:55 year:2020 number:5-6 day:08 month:07 pages:1665-1684 https://doi.org/10.1007/s00382-020-05346-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_154 GBV_ILN_2018 GBV_ILN_4277 AR 55 2020 5-6 08 07 1665-1684 |
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550 VZ 16,13 ssgn Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model Antarctic ice sheet Precipitation Shortwave cloud feedbacks Structural uncertainty |
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Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model |
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Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model |
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Schneider, David P. |
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Climate dynamics |
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Schneider, David P. Kay, Jennifer E. Lenaerts, Jan |
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improved clouds over southern ocean amplify antarctic precipitation response to ozone depletion in an earth system model |
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Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model |
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Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (CESM)—improving a long-standing bias in shortwave cloud forcing over the Southern Ocean—leads to an enhanced response of precipitation when the model is forced with realistic stratospheric ozone depletion, with other radiative forcing remaining constant. We analyze two ozone-forced ensemble experiments with the CESM version 1.1: one using the standard version of the model and the other using the cloud-modified version. The standard version exhibits a precipitation increase on the AIS of 34 gigatons $ year^{−1} $; the cloud-modified version shows an increase of 109 Gt $ year^{−1} $. The cloud-modified version shows a more robust, year-round poleward shift in the westerly jet and storm tracks, which brings more precipitation to the AIS, compared to the standard version. Greater surface warming and larger-amplitude stationary waves further increase the Antarctic precipitation response. The enhanced warming in the cloud-modified version is explained by larger positive shortwave cloud feedbacks, while the enhanced poleward jet shift is associated with a stronger meridional temperature gradient in the upper troposphere—lower stratosphere. These results illustrate (1) the sensitivity of forced changes in Antarctic precipitation to the mean state of a climate model and (2) the strong role of atmospheric dynamics in driving that forced precipitation response. © Springer-Verlag GmbH Germany, part of Springer Nature 2020 |
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Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (CESM)—improving a long-standing bias in shortwave cloud forcing over the Southern Ocean—leads to an enhanced response of precipitation when the model is forced with realistic stratospheric ozone depletion, with other radiative forcing remaining constant. We analyze two ozone-forced ensemble experiments with the CESM version 1.1: one using the standard version of the model and the other using the cloud-modified version. The standard version exhibits a precipitation increase on the AIS of 34 gigatons $ year^{−1} $; the cloud-modified version shows an increase of 109 Gt $ year^{−1} $. The cloud-modified version shows a more robust, year-round poleward shift in the westerly jet and storm tracks, which brings more precipitation to the AIS, compared to the standard version. Greater surface warming and larger-amplitude stationary waves further increase the Antarctic precipitation response. The enhanced warming in the cloud-modified version is explained by larger positive shortwave cloud feedbacks, while the enhanced poleward jet shift is associated with a stronger meridional temperature gradient in the upper troposphere—lower stratosphere. These results illustrate (1) the sensitivity of forced changes in Antarctic precipitation to the mean state of a climate model and (2) the strong role of atmospheric dynamics in driving that forced precipitation response. © Springer-Verlag GmbH Germany, part of Springer Nature 2020 |
| abstract_unstemmed |
Abstract Increasing precipitation on the Antarctic Ice Sheet (AIS) in a warming climate has the potential to partially mitigate Antarctica’s contribution to sea level rise. We show that a simple, physically motivated change to the shallow convective cloud phase in the Community Earth System Model (CESM)—improving a long-standing bias in shortwave cloud forcing over the Southern Ocean—leads to an enhanced response of precipitation when the model is forced with realistic stratospheric ozone depletion, with other radiative forcing remaining constant. We analyze two ozone-forced ensemble experiments with the CESM version 1.1: one using the standard version of the model and the other using the cloud-modified version. The standard version exhibits a precipitation increase on the AIS of 34 gigatons $ year^{−1} $; the cloud-modified version shows an increase of 109 Gt $ year^{−1} $. The cloud-modified version shows a more robust, year-round poleward shift in the westerly jet and storm tracks, which brings more precipitation to the AIS, compared to the standard version. Greater surface warming and larger-amplitude stationary waves further increase the Antarctic precipitation response. The enhanced warming in the cloud-modified version is explained by larger positive shortwave cloud feedbacks, while the enhanced poleward jet shift is associated with a stronger meridional temperature gradient in the upper troposphere—lower stratosphere. These results illustrate (1) the sensitivity of forced changes in Antarctic precipitation to the mean state of a climate model and (2) the strong role of atmospheric dynamics in driving that forced precipitation response. © Springer-Verlag GmbH Germany, part of Springer Nature 2020 |
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Improved clouds over Southern Ocean amplify Antarctic precipitation response to ozone depletion in an earth system model |
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