The NOAA Earth System Research Laboratory has an "ozone depleting gas index" (ODGI) data set from 1992 to 2018. This dataset summarizes Table 1 and Table 2 from its website. The primary interest here (for my purposes) is the ODGI indices (including the new 2012 measure). The data set includes constituent greenhouse gases/chlorines as well in parts per trillion. The primary use here is for in-class illustration.

ODGI

Format

A data frame with 56 observations on the following 16 variables.

year

the year

cat

categorical variable for the Antarctic or Mid-Latitudes measurements

cfc12

CFC-12 concentration in parts per trillion

cfc11

CFC-11 concentration in parts per trillion

ch3cl

chloromethane concentration in parts per trillion

ch3br

bromomethane concentration in parts per trillion

ccl4

carbon tetrachloride concentration in parts per trillion

ch3ccl3

methyl chloroform concentration in parts per trillion

halons

aggregate concentration in parts per trillion of H-1211, H-1301 and H-2402

cfc113

trichlorotrifluoroethane concentration in parts per trillion

hcfcs

aggregate concentration in parts per trillion of HCFC-22, HCFC-141b, and HCFC-142b

wmo_minor

aggregate concentration in parts per trillion of CFC-114, CFC-115, halon 2402 and halon 1201

sum

the sum of all greenhouse gas concentration measurements

eesc

includes consideration of lag times for transport and mixing associated with transport. New as of 2012

odgi_old

old greenhouse gas index, no longer supported as of 2012

odgi_new

new greenhouse gas index, as of 2012

Source

https://gml.noaa.gov/odgi/