1. PROJECT ------------ Title: The Spectral Nature of Stratospheric Temperature Adjustment and its Application to Halocarbon Radiative Forcing Dates: 2019-2020 Gunnar Myhre acknowledges support from the Norwegian Environment Agency 2. DATASET ------------ Title: Updated data for the Pinnock et al. (1995) method for computing halocarbon radiative forcing Description: The model described in Pinnock et al. (1995) permits the rapid and accurate calculation of the radiative forcing of halocarbons using the absorption cross-sections of those halocarbons (which could be derived from laboratory observations or quantum-chemical calculations). The provided values are an update to those given in Hodnebrog et al. (2013) and include, for the first time, an explicit wavenumber-dependent correction for the effect of stratospheric temperature adjustment. The revised method is described in Shine and Myhre (2020). The Excel file contains three tabs. Tab 1 is a README detailing the content of the spreadsheet and additional information on its use, including the units of the provided quantities. Tab 2 contains the radiative forcing as a function of wavenumber at 1 cm-1 resolution over the wavenumber range 0 - 3000 cm-1. Column 1 is wavenumber; Column 2 provides the instantaneous radiative forcing calculated using the Oslo Line-by-Line model (averaged from its 0.02 cm-1 resolution to 1 cm-1); Column 3 is the ratio of adjusted to instantaneous radiative forcing, calculated using the Reading Narrow Band Model, interpolated from 10 cm-1 to 1 cm-1; Column 4 is the product of Columns 2 and 3. Tab 3 is the same as Tab 2, but for 10 cm-1 resolution. Publication Year: 2020 Creator(s): Keith Shine and Gunnar Myhre Organisation(s): University of Reading and CICERO Center for International Climate Research Oslo Rights-holder(s): University of Reading and CICERO Center for International Climate Research Oslo 3. TERMS OF USE ----------------- This dataset is licensed by the rights-holder under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/. 4. CONTENTS ------------ File listing JAMES_pinadh_sm.xlsx is an Excel file with three tabs (see Section 2). 5. METHOD and PROCESSING -------------------------- The data is an update of the Pinnock et al.(1995) and Hodnebrog et al. (2013) method for rapid and accurate calculation of the radiative forcing of halocarbons from the absorption cross-section data for those molecules. The methodology and details of the calculation are provided in these two references. The update is described in Shine and Myhre (2020). The Oslo line-by-line instantaneous radiative forcing calculations have been updated, relative to Hodnebrog et al. (2013), and the stratospheric-temperature adjustment, which is required for radiative forcing calculations, as a function of wavenumber, is presented for the first time - this is calculated using the Reading Narrow Band Model, which was also updated relative to Hodnebrog et al. (2013). Hodnebrog, O., M. Etminan, J. S. Fuglestvedt, G. Marston, G. Myhre, C. J. Nielsen, K. P. Shine, and T. J. Wallington (2013), Global warming potentials and radiative efficiencies of halocarbons and related compounds: A comprehensive review, Reviews of Geophysics, 51(2), 300-378, https://doi.org/10.1002/rog.20013 Pinnock, S., M. Hurley, K. Shine, T. Wallington, and T. Smyth (1995), Radiative forcing of climate by hydrochlorofluorocarbons and hydrofluorocarbons, Journal of Geophysical Research-Atmospheres, 100(D11), 23227-23238, https://doi.org/10.1029/95JD02323 Shine, K. P., & Myhre, G. (2020), The Spectral Nature of Stratospheric Temperature Adjustment and its Application to Halocarbon Radiative Forcing. Journal of Advances in Modeling Earth Systems, 12, e2019MS001951, https://doi.org/10.1029/2019MS001951