Photolysis rate coefficients in the upper atmosphere: Effects of Line by Line calculations of the O2 absorption cross section in the Schumann-Runge bands

RAFAEL P. FERNÁNDEZ, GUSTAVO G. PALANCAR, SASHA MADRONICH, AND BEATRIZ M. TOSELLI

Elsevier

Lugar: The Nedherlands; Año: 2007 vol. 114 p. 1 - 1

p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 35.4pt; LINE-HEIGHT: 200%; TEXT-ALIGN: justify">A line by line (LBL) method to calculate highly resolved O2 absorption cross sections in the Schumann-Runge (SR) bands region was developed and integrated in the widely used Tropospheric Ultraviolet Visible (TUV) model to calculate accurate photolysis rate coefficients (J values) in the upper atmosphere at both small and large solar zenith angles (SZA). In order to obtain the O2 cross section between 49000 cm-1 and 57000 cm‑1, an algorithm which considers the position, strength, and half width of each spectral line was used. Every transition was calculated by using the HIgh-resolution TRANsmission molecular absorption database (HITRAN) and a Voigt profile. The temperature dependence of both the strength an