Skip to main content
. 2022 May 18;605(7910):483–489. doi: 10.1038/s41586-022-04605-4

Extended Data Fig. 7. Modelled annual mean ammonia mixing ratios at 250 hPa (11 km, about 223 K).

Extended Data Fig. 7

a, The EMAC global model simulations are higher than the MIPAS satellite observations, although consistent with aircraft measurements5,6. b, The TOMCAT global model predicts much less ammonia (<1 pptv) in the upper troposphere.