Poluianov, S. V., Kovaltsov, G. A., & Usoskin, I. G. (2020). A new full 3‐D model of cosmogenic tritium 3H production in the atmosphere (CRAC:3H). Journal of Geophysical Research: Atmospheres, 125, e2020JD033147. https://doi.org/10.1029/2020JD033147
A new full 3‐D model of cosmogenic tritium ³H production in the atmosphere (CRAC:3H)
|Author:||Poluianov, S. V.1,2; Kovaltsov, G. A.3; Usoskin, I. G.1,2|
1Sodankylä Geophysical Observatory, University of Oulu, Oulu, Finland
2Space Physics and Astronomy Research Unit, University of Oulu, Oulu, Finland
3Ioffe Physical-Technical Institute, St. Petersburg, Russia
|Online Access:||PDF Full Text (PDF, 1.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020092171450
American Geophysical Union,
|Publish Date:|| 2021-03-03
A new model of cosmogenic tritium (³H) production in the atmosphere is presented. The model belongs to the CRAC (Cosmic Ray Atmospheric Cascade) family and is named as CRAC:3H. It is based on a full Monte Carlo simulation of the cosmic ray induced atmospheric cascade using the Geant4 toolkit. The CRAC:3H model is able, for the first time, to compute tritium production at any location and time, for any given energy spectrum of the primary incident cosmic ray particles, explicitly treating, also for the first time, particles heavier than protons. This model provides a useful tool for the use of ³H as a tracer of atmospheric and hydrological circulation. A numerical recipe for practical use of the model is appended.
Journal of geophysical research. Atmospheres
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
This work was partly supported by the Academy of Finland (Projects ESPERA no. 321882 and ReSoLVE Centre of Excellence, no. 307411).
|Academy of Finland Grant Number:||
321882 (Academy of Finland Funding decision)
307411 (Academy of Finland Funding decision)
The yield/production functions and production rates of tritium, obtained in this work, are available in the supporting information to this paper. The used cross‐section data can be found in Nir et al. (1966) and Coste et al. (2012). The toolkit Geant4 (Agostinelli et al., 2003; Allison et al., 2006) is freely distributed under Geant4 Software License (https://www.geant4.org). This work used publicly available data for SEP events from the GLE database (https://gle.oulu.fi), sunspot number series from SILSO (https://www.sidc.be/silso/datafiles, Clette & Lefèvre, 2016), and heliospheric modulation potential series provided by the Oulu cosmic ray station (https://cosmicrays.oulu.fi/phi/phi.html).
© 2020. American Geophysical Union. The final authenticated version is available online at https://doi.org/10.1029/2020JD033147.