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Earth's topography is attributed to the interactions of the tectonic plates, but flow within the mantle also contributes to surface uplift and subsidence. An overview of recent research indicates that mantle-induced dynamic topography can be reconstructed by integrating the geological record with models of mantle flow.
Iron controls phytoplankton growth in large tracts of the global ocean, and thereby influences carbon dioxide drawdown. Recent advances reveal the importance of iron-binding ligands and organic matter remineralization in regulating ocean iron levels.
Slow slip, a mechanism by which faults can relieve stress, was thought to be distinct from earthquakes. However, a global review of slow-slip phenomena suggests that instead there is a continuum between the two types of event.
The terrestrial biosphere is a key regulator of atmospheric chemistry and climate. Total positive radiative forcing resulting from biogeochemical feedbacks between the terrestrial biosphere and atmosphere could be equally as important as that resulting from physical feedbacks.
The El Niño–Southern Oscillation is a naturally occurring fluctuation that originates in the tropical Pacific region and affects the lives of millions of people worldwide. An overview of relevant research suggests that progress in our understanding of the impact of climate change on many of the processes that contribute to El Niño variability is considerable, but projections for the phenomenon itself are not yet possible.
The use of fossil fuels and fertilizers has increased the amount of biologically reactive nitrogen in the atmosphere over the past century. A meta-analysis suggests that nitrogen deposition typically impedes the decomposition of carbon in forest soils, significantly reducing carbon dioxide emissions to the atmosphere.
Whether the characteristics of tropical cyclones have altered, or will alter, in a changing climate has been subject of considerable debate. An overview of recent research indicates that greenhouse warming will cause stronger storms, on average, but a decrease in the frequency of tropical cyclones.
