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Changes in calcification of marine organisms must be considered to explain the deepening of carbonate accumulation during ocean recovery from acidification events. According to a literature synthesis and modelling, dissolution of sedimentary carbonate is not sufficient to explain observations.
Groundwater-derived CO2 inputs and emissions along streams are highly variable in both space and time, according to measurements of dissolved CO2 from two headwater catchments.
A warm and semi-arid climate may be most consistent with geological evidence for flowing water on the surface of early Mars, despite the challenges of warming Mars under a faint young Sun.
Changes in Northern Hemisphere atmospheric temperature, pressure
patterns and winds emerge as a consistent response to Arctic sea-ice loss in six
coupled climate models.
Earth experienced a lull in magmatic and tectonic activity about 2.3 billion years ago, followed by a flare-up of magmatism, according to a compilation of existing geologic data. These events might mark the transition to the supercontinent cycle.
Land management with the aim of reducing incoming solar radiation could help with regional-scale climate adaptation and mitigation as well as ecosystem services, and avoids several shortcomings of global geoengineering.