The Detection and Attribution Model Intercomparion Project


DAMIP is part of the Coupled Model Intercomparison Project Phase 6 (CMIP6), a coordinated international effort "to better understand past, present and future climate changes arising from either natural, unforced variability or in response to changes in radiative forcing in a multi-model context."

DAMIP is the component of CMIP6 dealing with understanding the individual contributions of various external factors to past and future changes in global and regional climate.

The primary goals of DAMIP are to facilitate improved estimation of the contributions of anthropogenic and natural forcing changes to observed global warming as well as to observed global and regional changes in other climate variables; to contribute to the estimation of how historical emissions have altered and are altering contemporary climate risk; and to facilitate improved observationally-constrained projections of future climate change. Detection and attribution (D&A) studies typically require unforced control simulations and historical simulations including all major anthropogenic and natural forcings. Such simulations will be carried out as part of the CMIP6 DECK and the CMIP6 historical simulation. In addition D&A studies require simulations covering the historical period driven by individual forcings or subsets of forcings only: such simulations are proposed here. D&A simulations were an important component of CMIP5 and underpinned the climate change attribution assessments of the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Key novel features of the experimental design presented .here include.: new historical simulations of aerosols-only, stratospheric-ozone-only, CO2-only, .solar-only . and volcanic-only forcing, facilitating an improved estimation of the climate response to individual forcing; future single forcing experiments, allowing ..observationally-constrained projections of future climate change; and an experimental design which allows models with and without coupled atmospheric chemistry to be compared on an equal footing.