Long-term climate impacts of large stratospheric water vapor perturbations: Postprocessed MiMA data (Part 2)
Data files
Jul 16, 2024 version files 199.11 GB
Abstract
The amount of water vapor injected into the stratosphere after the eruption of Hunga Tonga-Hunga Ha’apai (HTHH) was unprecedented, and it is therefore unclear what it might mean for surface climate. We use chemistry climate model simulations to assess the long-term surface impacts of stratospheric water vapor (SWV) anomalies similar to those caused by HTHH, but neglect the relatively minor aerosol loading from the eruption. The simulations show that the SWV anomalies lead to strong and persistent warming of Northern Hemisphere landmasses in boreal winter, and austral winter cooling over Australia, years after eruption, demonstrating that large SWV forcing can have surface impacts on a decadal timescale. We also emphasize that the surface response to SWV anomalies is more complex than simple warming due to greenhouse forcing and is influenced by factors such as regional circulation patterns and cloud feedbacks. Further research is needed to fully understand the multi-year effects of SWV anomalies and their relationship with climate phenomena like El Nino Southern Oscillation.
README: Long-term climate impacts of large stratospheric water vapor perturbations: Postprocessed MiMA data
https://doi.org/10.5061/dryad.sbcc2frfx
This is data used for the paper
Jucker, M., C. Lucas, and D. Dutta, 2024: Long-term climate impacts of large stratospheric water vapor perturbations. J. Climate, doi 10.1175/JCLI-D-23-0437.1
File structure
The filenames follow a simple structure which is:
<experiment>_ [+ <variable>_] [+ season_] + {ctrl,pert,delta}_ + ens.nc
This encodes the following information:
<experiment>_
means the data comes from MiMA, and corresponds to one of the following experiments:bench_SH_
refers to the Southern Hemisphere benchmark setup of MiMA introduced by Garfinkel et al. (2021). This is the case for all files.fix_125Tg_
means both ozone and water vapor have been fixed to the WACCM simulations.fixq_o3init_125Tg_
means water vapor is fixed to WACCM simulations but ozone is fixed to climatology.fixo3_qinit_125Tg_
means ozone is fixed to WACCM simulations but water vapor is fixed to climatology.
<variable>_
is optional and only present if only that one variable is contained in the fileseason_
is optional and denotes files which have been averaged over full seasons. Ifseason_
is not present, the data is monthly (default).{ctrl,pert,delta}_
indicates whether the data comes from the control (ctrl
), or perturbation (pert
) simulation.delta
denotes files which are computed usingncdiff
between thepert
andctrl
simulations, i.e., they contain the differences betweenpert
andctrl
.ens.nc
means that these files contain the full ensemble information, i.e. there is an additional dimensionmember
which denotes the ensemble member.
Individual files
File | Numerical setup | Data |
---|---|---|
bench_SH_fixq_o3init_125Tg_delta_ens_nc | water vapor is fixed to WACCM simulations but ozone is fixed to climatology | anomalies |
bench_SH_fixo3_qinit_125Tg_season_delta_ens.nc | ozone is fixed to WACCM simulations but water vapor is fixed to climatology | seasonal anomalies |
bench_SH_fixq_o3init_125Tg_season_ctrl_ens.nc | water vapor is fixed to WACCM simulations but ozone is fixed to climatology | seasonal control |
bench_SH_fixo3_qinit_125Tg_season_pert_ens.nc | ozone is fixed to WACCM simulations but water vapor is fixed to climatology | seasonal perturbation |
bench_SH_fixq_o3init_125Tg_season_pert_ens.nc | water vapor is fixed to WACCM simulations but ozone is fixed to climatology | seasonal perturbation |
bench_SH_fixq_o3init_125Tg_season_delta_ens.nc | water vapor is fixed to WACCM simulations but ozone is fixed to climatology | seasonal anomalies |
bench_SH_fixo3_qinit_125Tg_season_ctrl_ens.nc | ozone is fixed to WACCM simulations but water vapor is fixed to climatology | seasonal control |
bench_SH_fix_125Tg_season_pert_ens.nc | both ozone and water vapor have been fixed to the WACCM simulations | seasonal perturbation |
bench_SH_fix_125Tg_season_delta_ens.nc | both ozone and water vapor have been fixed to the WACCM simulations | seasonal anomalies |
bench_SH_fix_125Tg_season_ctrl_ens.nc | both ozone and water vapor have been fixed to the WACCM simulations | seasonal control |
bench_SH_fix_125Tg_cfld_delta.nc | both ozone and water vapor have been fixed to the WACCM simulations | anomalies, downward longwave flux at 200hPa only |
bench_SH_fixq_o3init_125Tg_pert_ens.nc | water vapor is fixed to WACCM simulations but ozone is fixed to climatology | perturbation |
bench_SH_fixq_o3init_125Tg_ctrl_ens.nc | water vapor is fixed to WACCM simulations but ozone is fixed to climatology | control |
bench_SH_fixo3_qinit_125Tg_pert_ens.nc | ozone is fixed to WACCM simulations but water vapor is fixed to climatology | perturbation |
bench_SH_fixo3_qinit_125Tg_ctrl_ens.nc | ozone is fixed to WACCM simulations but water vapor is fixed to climatology | control |
bench_SH_fix_125Tg_pert_ens.nc | both ozone and water vapor have been fixed to the WACCM simulations | perturbation |
bench_SH_fix_125Tg_delta_ens.nc | both ozone and water vapor have been fixed to the WACCM simulations | anomalies |
bench_SH_fix_125Tg_ctrl_ens.nc | both ozone and water vapor have been fixed to the WACCM simulations | control |
bench_SH_fix_125Tg_cfsd_delta.nc | both ozone and water vapor have been fixed to the WACCM simulations | anomalies, downward shortwave flux at 200hPa only |
Please see the main data repository for more information.