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The amount of carbon dioxide released by the Australian wildfires of 2019–2020 is uncertain, but is estimated here using satellite observations of carbon monoxide to be more than twice the amount suggested by fire inventories.
Oceanic deposition of wildfire aerosols can enhance marine productivity, as supported here by satellite and in situ profiling floats data showing that emissions from the 2019–2020 Australian wildfires fuelled phytoplankton blooms in the Southern Ocean.
Analysis of shallow-water marine carbonate samples from 101 stratigraphic units allows construction of a record of lithium isotopes from the past 3 billion years, tracking the evolution of the global carbon and silicon cycles.
Aircraft observations of atmospheric carbon dioxide and monoxide concentrations in Brazil show higher carbon emissions in eastern Amazonia than in the western part, which are linked to increased ecosystem stress and fire occurrence.
To enable net-negative CO2 emissions, the repayment of previously accrued carbon debt by establishing the responsibility for the net removal of CO2 by carbon-emitting parties through carbon removal obligations is necessary.
A revised date for the Laacher See eruption using measurements of subfossil trees shifts the chronology of European varved lakes relative to the Greenland ice core record, synchronizing the onset of the Younger Dryas across the North Atlantic–European sector.
Using a global mass-balance approach to calculate evapotranspiration, it is shown that global land evapotranspiration increased by 10% between 2003 and 2019, driven mainly by warming land temperatures.
Analyses and modelling of noble gases in groundwater show that the mean annual surface temperatures of low-altitude, low-to-mid-latitude land masses were about 6 °C cooler during the Last Glacial Maximum than during the Late Holocene.
Efficient statistical emulation of melting land ice under various climate scenarios to 2100 indicates a contribution from melting land ice to sea level increase of at least 13 centimetres sea level equivalent.
Analysis of satellite stereo imagery uncovers two decades of mass change for all of Earth’s glaciers, revealing accelerated glacier shrinkage and regionally contrasting changes consistent with decadal climate variability.
Ongoing global warming is likely to cause tipping point thresholds to be passed, but an abrupt system change can still be avoided if the warming is reversed quickly relative to the timescale of the tipping element.
Accounting for equity influences the social cost of methane more than climate model uncertainty does and produces results that differ by over an order of magnitude between low- and high-income regions.
This Review proposes an interdisciplinary framework for researching climate–society interactions that focuses on the mechanisms through which climate change has influenced societies, and the uncertainties of discerning this influence across different spatiotemporal scales.
A synthesis of elevated carbon dioxide experiments reveals that when plant biomass is strongly stimulated by elevated carbon dioxide levels, soil carbon storage declines, and where biomass is weakly stimulated, soil carbon accumulates.
Data from the ICESat-2 satellite quantifying the variability of water levels in natural and human-managed water bodies show that a disproportionate majority of global water storage variability occurs in human-managed reservoirs.
Atmospheric concentration measurements at remote sites around the world reveal an accelerated decline in the global mean CFC-11 concentration during 2018 and 2019, reversing recent trends and building confidence in the timely recovery of the stratospheric ozone layer.
Atmospheric data and chemical-transport modelling show that CFC-11 emissions from eastern China have again decreased, after increasing in 2013–2017, and a delay in ozone-layer recovery has probably been avoided.
Unexpected intervals of low 230Th concentration in marine sediment cores are explained by considering that during at least two such periods, the Arctic Ocean and Nordic seas were composed entirely of fresh water and covered by a thick ice shelf.
Modelling and remote sensing show that by the end of the twenty-first century, lake heatwaves will be several degrees Celsius warmer and some will be months longer, with potentially major adverse consequences for lake ecosystems.
Iceberg-trajectory models along with multi-proxy evidence from sediment cores from the Indian Ocean show that northward shifts in Antarctic iceberg melt redistributed freshwater in the Southern Ocean during the Pleistocene.
North Atlantic landfalling hurricanes are weakening more slowly than in the past because warming oceans are increasing the moisture carried by the storm until it hits land, and this storm moisture acts as an ongoing heat source post-landfall.
The response of tropical precipitation to variation in sea surface temperature is stronger than in most climate models, with cool and warm ocean regions linked by strong shallow atmospheric circulations.
Multicriteria optimization identifies global priority areas for ecosystem restoration and estimates their benefits for biodiversity and climate, providing cost–benefit analyses that highlight the importance of optimizing spatial planning and incorporating several biomes in restoration strategies.
Bottom-up and top-down approaches are used to quantify global nitrous oxide sources and sinks resulting from both natural and anthropogenic sources, revealing a 30% increase in global human-induced emissions between 1980 and 2016.
Modelling shows that the Antarctic Ice Sheet exhibits multiple temperature thresholds beyond which ice loss would become irreversible, and once melted, the ice sheet can regain its previous mass only if the climate cools well below pre-industrial temperatures.
Direct satellite measurements of atmospheric isoprene are compared with model predictions, showing broad agreement but highlighting spatial and temporal biases in modelled isoprene and nitrogen oxide emissions.
A compilation of proxy data are used with an isotope-enabled climate model ensemble to constrain cooling during the Last Glacial Maximum, producing estimates of equilibrium climate sensitivity that agree well with the current consensus range.