HITRAN2020: An overview of what to expect
- 1Center for Astrophysics | Harvard & Smthsonian, Atomic and Molecular Physics Division, Cambridge, United States of America (robert.hargreaves@cfa.harvard.edu)
- 2University College London, London, UK
- 3USTC, Hefei, China
- 4International Atomic Energy Agency, Division of Physical and Chemical Sciences, Vienna, Austria
- 5Tomsk State University, Laboratory of Quantum Mechanics of Molecules and Radiative Processes, Tomsk, Russia
The HITRAN database is an integral component of numerous atmospheric radiative transfer models and it is therefore essential that the database contains the most appropriate up-to-date spectroscopic parameters. To this end, the HITRAN2020 database is scheduled to be released at the end of this year. The compilation of this edition (as is the tradition for the HITRAN database) exemplifies the efficiency and necessity of worldwide scientific collaborations. It is a titanic effort of experimentalists, theoreticians and atmospheric scientists, who measure, calculate and validate the HITRAN data.
The HITRAN line-by-line lists for almost all 49 molecules have been updated in comparison to HITRAN2016 (Gordon et al., 2017), the previous compilation. The extent of these updates depend on the molecule, but range from small adjustments for a few lines of an individual molecule to complete replacements of line lists and the introduction of new isotopologues. Many new vibrational bands have been added to the database, thereby extending the spectral coverage and completeness of the datasets. In addition the accuracy of the parameters for major atmospheric absorbers has been substantially increased, often featuring sub-percent uncertainties.
Furthermore, the amount of parameters has also been significantly increased. For example, HITRAN2020 will now incorporate non-Voigt line profiles for many gases, broadening by water vapour (Tan et al., 2019), as well as updated collision induced absorption sets (Karman et al., 2019). The HITRAN2020 edition will continue taking advantage of the new structure and interface available at www.hitran.org (Hill et al., 2016) and the HITRAN Application Programming Interface (Kochanov et al., 2016).
This talk will provide a summary of these updates, emphasizing details of some of the most important or drastic improvements.
References:
Gordon, I.E., .et al., (2017), JQSRT 203, 3–69. (doi:10.1016/j.jqsrt.2017.06.038)
Hill, C., et al., (2016), JQSRT 177, 4–14. (doi:10.1016/j.jqsrt.2015.12.012)
Karman, T., et al. (2019), Icarus 328, 160–175. (doi:10.1016/j.icarus.2019.02.034)
Kochanov, R.V., et al.,( 2016), JQSRT 177, 15–30. (doi:10.1016/j.jqsrt.2016.03.005)
Tan, Y., et al., (2019), J. Geophys. Res. Atmos. 124, 11580-11594. (doi:10.1029/2019JD030929)
How to cite: Hargreaves, R., Gordon, I., Rothman, L., Hashemi, R., Karlovets, E., Skinner, F., Conway, E., Tan, Y., Hill, C., and Kochanov, R.: HITRAN2020: An overview of what to expect, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-20533, https://doi.org/10.5194/egusphere-egu2020-20533, 2020
