Sentences with phrase «low effective climate sensitivity»

We can say that the GCM results (using the same input forcings and the same modeled temperature outputs) can be matched with a zero - dimensional model with low effective climate sensitivity.

Not exact matches

Depending on meridional heat transport, when freezing temperatures reach deep enough towards low - latitudes, the ice - albedo feedback can become so effective that climate sensitivity becomes infinite and even negative (implying unstable equilibrium for any «ice - line» (latitude marking the edge of ice) between the equator and some other latitude).

The «flaw» of low - ECS climate model studies may not be so much in aerosols, the NASA study suggests, as the effective radiative forcing scenario (with high climate sensitivity) is accompanied with relatively low value for aerosol efficacy:

From that insight and their calculations they conclude the low - climate sensitivity model studies (suggesting climate sensitivity best estimate around 2 degrees Celsius) should be revised upwards to 2.6 degrees following differences in efficacies from «instantaneous radiative forcing» — and further revised upwards to 3 degrees [the value most studies agree on] when climate forcing efficacy is calculated from ERF — «effective radiative forcing».

As a result, the study would provide little evidence that historical period observational estimates of ECS have been biased low in relation to effective climate sensitivity.

That a robust behaviour in models of apparent (effective) climate sensitivity being lower in the early years after a forcing is imposed than subsequently, rather than remaining constant, requires multiplying estimates of climate sensitivity by a further factor of ~ 1.25 in order to convert what they actually estimate (effective climate sensitivity) to ECS.

The lower value — which conforms rather more closely with mainstream thinking than the higher value yields an effective climate sensitivity of ca 1.5 deg K for a doubling of CO2, which gets fairly close to ZDM estimates using historical forcing, temperature and ocean heat data.»

The central conclusion of this study is that to disregard the low values of effective climate sensitivity (≈ 1 °C) given by observations on the grounds that they do not agree with the larger values of equilibrium, or effective, climate sensitivity given by GCMs, while the GCMs themselves do not properly represent the observed value of the tropical radiative response coefficient, is a standpoint that needs to be reconsidered.