As not all ACCRI models simulated the temperature change, the applicability of the Lund et al.
ACCRI program has made some important contributions to advance the scientific understanding of climate impacts of aviation emissions.
Despite the complexities of the climate system, ACCRI helped constrain some uncertainties; however, large uncertainties have emerged in some areas (e.
ACCRI has contributed to the estimation of aviation-induced cirrus cloud climate forcing based on global observation datasets and increased the level of scientific understanding from "very low" to "low.
METRICS FOR AVIATION EFFECTS ON CLIMATE: ACCRI CONTRIBUTIONS
These metrics, especially RF as discussed here, have been reevaluated using ACCRI results both from chemistry--climate models and from observations for contrails.
2010), ACCRI studies have updated the values for the globally averaged RFs for individual components.
Aviation-related RF values are quite inhomogeneous in space and time and varying degrees of coupling are used by the ACCRI models.
does not directly use ACCRI results but suggests that the GWP concept does in fact represent a relatively robust, transparent, and policy-relevant emission metric, except for the short-lived climate forcers (e.
IMPLEMENTATION OF ACCRI RESULTS IN A SIMPLE CLIMATE MODEL
New short-lived climate forcer (SLCF) pathway, such as the impact of nitrates and the indirect sulfate response identified in ACCRI studies, climate modules are not currently included in the APMT-I and will be added upon their further refinement.
The pre-ACCRI APMT-I climate module was evaluated relative to the more complex chemistry-climate models within ACCRI (e.