Observationally Constrained Cloud Phase Unmasks Orbitally Driven Climate Feedbacks

An orbitally driven tropical source for abrupt climate change

Paleoclimatic data is increasingly showing that abrupt change is present in wide regions of the globe. Here we present a mechanism for abrupt climate change with global implications. Results from a tropical coupled ocean-atmosphere model show that under certain orbital con gurations of the past, variability associated with El Ni~ no/Southern Oscillation (ENSO) physics can abruptly lock to the s...

Low cloud-SST feedbacks influence tropical Pacific climate variability

Atmospheric chemistry‐climate feedbacks

[1] We extend the theory of climate feedbacks to include atmospheric chemistry. A change in temperature caused by a radiative forcing will include, in general, a contribution from the chemical change that is fed back into the climate system; likewise, the change in atmospheric burdens caused by a chemical forcing will include a contribution from the associated climate change that is fed back in...

Computing and Partitioning Cloud Feedbacks using Cloud

7 Cloud radiative kernels and histograms of cloud fraction, both as functions of cloud 8 top pressure and optical depth, are used to quantify cloud amount, cloud height and cloud 9 optical depth feedbacks. The analysis is applied to doubled CO2 slab-ocean simulations 10 from ten global climate models participating in the Cloud Feedback Model Intercomparison 11 Project. In the ensemble mean, tot...

Biosphere feedbacks and climate change

POLICY ACTION ON CLIMATE CHANGE IS INFORMED BY CLIMATE MODEL projections as described most recently in the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC). The models used are general circulation models (GCMs), which numerically represent the physical climate system in three dimensions, including the hydrological cycle. These are complemented by recently de...