Articles | Volume 18, issue 2
Research article
19 Jan 2018
Research article |  | 19 Jan 2018

A refined method for calculating equivalent effective stratospheric chlorine

Andreas Engel, Harald Bönisch, Jennifer Ostermöller, Martyn P. Chipperfield, Sandip Dhomse, and Patrick Jöckel

Data sets

Uncertainty analysis of projections of ozone-depleting substances: mixing ratios, EESC, ODPs, and GWPs G. J. M. Velders and J. S. Daniel

Earth System Chemistry integrated Modelling (ESCiMo) with the Modular Earth Submodel System (MESSy) version~2.51 P. J\"{o}ckel, H. Tost, A. Pozzer, et al.

Short summary
We present a new method to derive equivalent effective stratospheric chlorine (EESC), which is based on an improved formulation of the propagation of trends of species with chemical loss from the troposphere to the stratosphere. EESC calculated with the new method shows much better agreement with model-derived ESC. Based on this new formulation, we expect the halogen impact on midlatitude stratospheric ozone to return to 1980 values about 10 years later, then using the current formulation.
Final-revised paper