Cosmogenic tritium data modeled by MIROC5-iso

This data set contains model values from 3 simulations produced with the isotope-enabled atmosphere GCM MIROC5-iso, in which tritium has been implemented. The simulations are for the period 1979-2018 and were performed with different natural tritium production rates. A complete description can be found in Cauquoin, A., Fourré, É., Landais, A., Okazaki, A., and Yoshimura, K.: Modeling natural tritium in precipitation and its dependence on decadal variations of solar activity using the atmospheric general circulation model MIROC5-iso, J. Geophys. Res. Atmos., 129, e2023JD039745, https://doi.org/10.1029/2023JD039745, 2024.

The 3 different simulations are:

MB2009_3H_cte: with constant long-term average tritium production rate values over time from Masarik and Beer, 2009 (https://doi.org/10.1029/2008JD010557);

CRAC_3H_cte: with constant long-term average production rate values over time from CRAC:3H model (https://doi.org/10.1029/2020JD033147);

CRAC_3H_solar: with monthly mean tritium production rate variations from CRAC:3H model due to modulation of GCR by heliomagnetic and geomagnetic fields over time.

The model data can be downloaded as netcdf files:

*.197901-201812.monmean.TU_precip.nc: monthly mean tritium in precipitation over the period 1979-2018;

*.200801-201812.timmean.TU_precip.nc: mean tritium in precipitation over the period 2008-2018;

*.200801-201812.ymonmean.TU_precip.nc: multi-year monthly mean tritium in precipitation over the period 2008-2018;

*.200801-201812.timmean.TU_q.nc: mean tritium in water vapor from 1000 to 10 hPa over the period 2008-2018;

MIROC5-iso.197901-201812.monmean.precip.nc: monthly precipitation rate (mm/month) over the period 1979-2018 (same for the three simulations);

MIROC5-iso.200801-201812.ymonmean.precip.nc: multi-year monthly precipitation rate (mm/month) over the period 2008-2018 (same for the three simulations);

MIROC5-iso.200801-201812.timmean.precip.nc: mean precipitation rate (mm/month) over the period 2008-2018 (same for the three simulations);

MIROC5-iso.200801-201812.timmean.q.nc: mean specific humidity (kg/kg) from 1000 to 10 hPa over the period 2008-2018;

CRAC_3H_solar.197901-201812.monmean.fldmean.cosmo_HTO_prod.nc: average cosmogenic HTO production monthly variations over the period 1979-2018 according to CRAC_3H_solar simulation.