The Connected Isotopic Water Cycle in the Community Earth System Model Version 1
Abstract Because of the pervasive role of water in the Earth system, the relative abundances of stable isotopologues of water are valuable for understanding atmospheric, oceanic, and biospheric processes, and for interpreting paleoclimate proxy reconstructions. Isotopologues are transported by both...
Published in: | Journal of Advances in Modeling Earth Systems |
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ftdoajarticles:oai:doaj.org/article:d5849c6441214a9691105116e30eb89e 2023-05-15T18:18:46+02:00 The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 E. Brady S. Stevenson D. Bailey Z. Liu D. Noone J. Nusbaumer B. L. Otto‐Bliesner C. Tabor R. Tomas T. Wong J. Zhang J. Zhu 2019-08-01T00:00:00Z https://doi.org/10.1029/2019MS001663 https://doaj.org/article/d5849c6441214a9691105116e30eb89e EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2019MS001663 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2019MS001663 https://doaj.org/article/d5849c6441214a9691105116e30eb89e Journal of Advances in Modeling Earth Systems, Vol 11, Iss 8, Pp 2547-2566 (2019) climate modeling water isotopologues CESM Physical geography GB3-5030 Oceanography GC1-1581 article 2019 ftdoajarticles https://doi.org/10.1029/2019MS001663 2022-12-31T04:41:39Z Abstract Because of the pervasive role of water in the Earth system, the relative abundances of stable isotopologues of water are valuable for understanding atmospheric, oceanic, and biospheric processes, and for interpreting paleoclimate proxy reconstructions. Isotopologues are transported by both large‐scale and turbulent flows, and the ratio of heavy to light isotopologues changes due to fractionation that can accompany condensation and evaporation processes. Correctly predicting the isotopic distributions requires resolving the relationships between large‐scale ocean and atmospheric circulation and smaller‐scale hydrological processes, which can be accomplished within a coupled climate modeling framework. Here we present the water isotope‐enabled version of the Community Earth System Model version 1 (iCESM1), which simulates global variations in water isotopic ratios in the atmosphere, land, ocean, and sea ice. In a transient Last Millennium simulation covering the 850–2005 period, iCESM1 correctly captures the late‐twentieth‐century structure of δ18O and δD over the global oceans, with more limited accuracy over land. The relationship between salinity and seawater δ18O is also well represented over the observational period, including interbasin variations. We illustrate the utility of coupled, isotope‐enabled simulations using both Last Millennium simulations and freshwater hosing experiments with iCESM1. Closing the isotopic mass balance between all components of the coupled model provides new confidence in the underlying depiction of the water cycle in CESM, while also highlighting areas where the underlying hydrologic balance can be improved. The iCESM1 is poised to be a vital community resource for ongoing model development with both modern and paleoclimate applications. Article in Journal/Newspaper Sea ice Directory of Open Access Journals: DOAJ Articles Journal of Advances in Modeling Earth Systems 11 8 2547 2566 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
climate modeling water isotopologues CESM Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
climate modeling water isotopologues CESM Physical geography GB3-5030 Oceanography GC1-1581 E. Brady S. Stevenson D. Bailey Z. Liu D. Noone J. Nusbaumer B. L. Otto‐Bliesner C. Tabor R. Tomas T. Wong J. Zhang J. Zhu The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 |
topic_facet |
climate modeling water isotopologues CESM Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract Because of the pervasive role of water in the Earth system, the relative abundances of stable isotopologues of water are valuable for understanding atmospheric, oceanic, and biospheric processes, and for interpreting paleoclimate proxy reconstructions. Isotopologues are transported by both large‐scale and turbulent flows, and the ratio of heavy to light isotopologues changes due to fractionation that can accompany condensation and evaporation processes. Correctly predicting the isotopic distributions requires resolving the relationships between large‐scale ocean and atmospheric circulation and smaller‐scale hydrological processes, which can be accomplished within a coupled climate modeling framework. Here we present the water isotope‐enabled version of the Community Earth System Model version 1 (iCESM1), which simulates global variations in water isotopic ratios in the atmosphere, land, ocean, and sea ice. In a transient Last Millennium simulation covering the 850–2005 period, iCESM1 correctly captures the late‐twentieth‐century structure of δ18O and δD over the global oceans, with more limited accuracy over land. The relationship between salinity and seawater δ18O is also well represented over the observational period, including interbasin variations. We illustrate the utility of coupled, isotope‐enabled simulations using both Last Millennium simulations and freshwater hosing experiments with iCESM1. Closing the isotopic mass balance between all components of the coupled model provides new confidence in the underlying depiction of the water cycle in CESM, while also highlighting areas where the underlying hydrologic balance can be improved. The iCESM1 is poised to be a vital community resource for ongoing model development with both modern and paleoclimate applications. |
format |
Article in Journal/Newspaper |
author |
E. Brady S. Stevenson D. Bailey Z. Liu D. Noone J. Nusbaumer B. L. Otto‐Bliesner C. Tabor R. Tomas T. Wong J. Zhang J. Zhu |
author_facet |
E. Brady S. Stevenson D. Bailey Z. Liu D. Noone J. Nusbaumer B. L. Otto‐Bliesner C. Tabor R. Tomas T. Wong J. Zhang J. Zhu |
author_sort |
E. Brady |
title |
The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 |
title_short |
The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 |
title_full |
The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 |
title_fullStr |
The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 |
title_full_unstemmed |
The Connected Isotopic Water Cycle in the Community Earth System Model Version 1 |
title_sort |
connected isotopic water cycle in the community earth system model version 1 |
publisher |
American Geophysical Union (AGU) |
publishDate |
2019 |
url |
https://doi.org/10.1029/2019MS001663 https://doaj.org/article/d5849c6441214a9691105116e30eb89e |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 11, Iss 8, Pp 2547-2566 (2019) |
op_relation |
https://doi.org/10.1029/2019MS001663 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2019MS001663 https://doaj.org/article/d5849c6441214a9691105116e30eb89e |
op_doi |
https://doi.org/10.1029/2019MS001663 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
11 |
container_issue |
8 |
container_start_page |
2547 |
op_container_end_page |
2566 |
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1766195466274340864 |