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Activate isotopes in CESM2.x

L

littledddna@gmail_com

Member
Dear all,

I was wondering if it is possible to activate isotopes in CESM2.x and do a paleo simulation (carbon and water isotopes etc.) in all components ?
Is it the same as it is in CESM1.3? For instance, set wiso = "true" in CAM and ciso in POP2?

I found the following CESM2-PaleoCalibr on github but it did not mention the isotopes.

Thanks very much

Xiao
 
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D

dbailey

CSEG and Liaisons
Staff member
I wish it was that easy. Unforutunately, the isotopes are not fully supported in CESM2. Some components still have them, but this has not been tested. I would recommend sticking with iCESM. Transferring to the paleo forum.
 
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J

jiangzhu

Member
Water isotope capability is only available in coupled iCESM1.3 and atmosphere-only iCAM6. You cannot get water isotope capability in coupled CESM2.
iCESM1.3: GitHub - NCAR/iCESM1.3_iHESP_hires: Isotope-enabled version of CESM1.3 that matches the iHESP code base.
iCAM6: GitHub - nusbaume/CAM at geotrace_cam
References:
Brady, E., S. Stevenson, D. Bailey, Z. Liu, D. Noone, J. Nusbaumer, B. L. Otto-Bliesner, C. Tabor, R. Tomas, T. Wong, et al. (2019), The Connected Isotopic Water Cycle in the Community Earth System Model Version 1, J. Adv. Model. Earth Syst., 11, 2547–2566.
Fiorella, R. P., Siler, N., Nusbaumer, J., & Noone, D. C. (2021). Enhancing understanding of the hydrological cycle via pairing of process-oriented and isotope ratio tracers. Journal of Advances in Modeling Earth Systems, 13, e2021MS002648.

We are working on implementing water isotopes into CESM3 and future versions but it may take several years.
 
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L

littledddna@gmail_com

Member
jiangzhu said:
Water isotope capability is only available in coupled iCESM1.3 and atmosphere-only iCAM6. You cannot get water isotope capability in coupled CESM2.
iCESM1.3: GitHub - NCAR/iCESM1.3_iHESP_hires: Isotope-enabled version of CESM1.3 that matches the iHESP code base.
iCAM6: GitHub - nusbaume/CAM at geotrace_cam
References:
Brady, E., S. Stevenson, D. Bailey, Z. Liu, D. Noone, J. Nusbaumer, B. L. Otto-Bliesner, C. Tabor, R. Tomas, T. Wong, et al. (2019), The Connected Isotopic Water Cycle in the Community Earth System Model Version 1, J. Adv. Model. Earth Syst., 11, 2547–2566.
Fiorella, R. P., Siler, N., Nusbaumer, J., & Noone, D. C. (2021). Enhancing understanding of the hydrological cycle via pairing of process-oriented and isotope ratio tracers. Journal of Advances in Modeling Earth Systems, 13, e2021MS002648.

We are working on implementing water isotopes into CESM3 and future versions but it may take several years.
Click to expand...
Thanks very much, Jiang, I will iCESM1.3 as before. But I noticed that CLM in iCESM1.3, there is no version number as it is in iCESM1.2.
So, which version of CLM do we have in iCESM1.3?

Thanks very much for model developing and have a nice weekend

Best

Xiao


jiangzhu said:
Water isotope capability is only available in coupled iCESM1.3 and atmosphere-only iCAM6. You cannot get water isotope capability in coupled CESM2.
iCESM1.3: GitHub - NCAR/iCESM1.3_iHESP_hires: Isotope-enabled version of CESM1.3 that matches the iHESP code base.
iCAM6: GitHub - nusbaume/CAM at geotrace_cam
References:
Brady, E., S. Stevenson, D. Bailey, Z. Liu, D. Noone, J. Nusbaumer, B. L. Otto-Bliesner, C. Tabor, R. Tomas, T. Wong, et al. (2019), The Connected Isotopic Water Cycle in the Community Earth System Model Version 1, J. Adv. Model. Earth Syst., 11, 2547–2566.
Fiorella, R. P., Siler, N., Nusbaumer, J., & Noone, D. C. (2021). Enhancing understanding of the hydrological cycle via pairing of process-oriented and isotope ratio tracers. Journal of Advances in Modeling Earth Systems, 13, e2021MS002648.

We are working on implementing water isotopes into CESM3 and future versions but it may take several years.
Click to expand...
 
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