Sentences with phrase «occasional temporary increased»

Not exact matches

Superimposed on the long - term trends are occasional global warming spikes, «hyperthermals», most prominently the Palaeocene — Eocene Thermal Maximum (PETM) at approximately 56 Myr BP [12] and the Mid-Eocene Climatic Optimum at approximately 42 Myr BP [13], coincident with large temporary increases of atmospheric CO2.