Line parameter database H2O self-broadened 700-2000 cm-1

DLR line parameter database for self-broadened H2O in the 700 – 2000 cm-1 region.

New self-broadened H2O measurements and analysis were performed with the aim of determining the H2O self-continuum. Zenodo serves as a repository for the line parameter database.

Measurements in the spectral range of 700 – 2000 cm⁻¹ were conducted using a Bruker 125HR Interferometer with an attached multi-reflection cell. The spectral resolution was 0.003 cm⁻¹. Measurements were corrected regarding the wavenumber axis (→ N2O reference lines [1]), detector non-linearity, thermal self-radiation, and the instrumental line profile function (→ LINEFIT [2]). For the preparation of the parameter database, measurements were analyzed using pure H₂O pressures between 0.003 – 20 mbar, path lengths between 14 – 161 m, and temperatures of 294.2 K and 353.2 K. The line profile function of a quadratic speed-dependent Voigt which was extended for Rosenkranz line mixing was used. The following line parameters were determined for the four most abundant H₂O isotopologues H216O (main isotopologue), H218O, H217O, HD16O:

Line position
ν0

Line intensity
S

Pressure self-broadening parameter
γ0,self

Speed-dependence parameter of pressure self-broadening
γ2,self

Temperature exponent of pressure self-broadening
nself

Pressure self-shift parameter
δ0,self

Temperature dependence of pressure self-shift
δT0,self

First order Rosenkranz self-line-mixing parameter @ 296 K
Yself

Temperature dependence of first order Rosenkranz self-line-mixing
YT1self

Provided files:

Readme for database and provided files:

DLR_Database_Pure_H2O_700-2000_cm-1- Readme.docx

Detailed, commented version:

DLR_Database_Pure_H2O_700-2000_cm-1.xlsx

Version in extended HITRAN format:

DLR_Database_Pure_H2O_700-2000_cm-1.hit

List of occurring HITRAN references:

DLR_Database_Pure_H2O_700-2000_cm-1_HITRAN_references.html