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IMAGE: Figure 2. Tropical Pacific mean-state change during 2011-2098, after removing the impacts of 13 common biases in the CMIP5 original projections, in (a) SST, (b) convection (omega, upward negative), and. view more
Credit: ©Science China Press
A reliable projection of extreme El Niño frequency change in future warmer climate is critical to managing socio-economic activities and human health, strategic policy decisions, environmental and ecosystem managements, and disaster mitigations in many parts of the world. Unfortunately, long-standing common biases in CMIP5 models, despite enormous efforts on the numerical model development over the past decades, make it hard to achieve a reliable projection of the extreme El Niño frequency change in the future. While increasing attentions have been paid to estimate possible impacts of models biases, it is not yet fully understood whether and how much models common biases would impact the projection of the extrem
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IMAGE: A compilation of pyrite sulfur isotope data showing global occurrences of superheavy pyrite in the Cryogenian interglacial period. After the Sturtian glaciation, mid-depth seawater column was sulfidic which was sustained. view more
Credit: ©Science China Press
The Sturtian Snowball Earth glaciation (717~660 million years ago) represents the most severe icehouse climate in Earth s history. Geological evidence indicates that, during this glaciation, ice sheets extended to low latitudes, and model simulations suggest global frozen ocean as well as a prolonged shut-down of the hydrological cycles. The Snowball Earth hypothesis poses that the Sturtian global glaciation is directly triggered by intense continental weathering that scavenges atmospheric CO