Small variations in clumped O2 isotopes reflect temperatures in the upper troposphere. Bubbles measured in polar ice cores show the global lapse-rate appears to steepen during the Last Glacial Maximum.
Susan Trumbore
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What Caused the Open Habitat Transition in the West-Central U.S.?
Between 26-15 My ago, forests covering west-central North America gave way to open, grassy habitats. Now, oxygen isotope records suggest this shift is owed to drier winters and increased aridity.
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What Conditions Accompanied the Late Ordovician Mass Extinction?
The second-largest mass extinction in Earth’s history took place in a period of stresses from non-sulfidic anoxia in shelf areas, together with glacioeustatic sea-level change and climatic cooling.
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Tracking from Space how Extreme Drought Impacts Carbon Emissions
Carbon dioxide emissions from wildfires combined with reduced carbon uptake by intact ecosystems during the 2019-202
0 fire season to approximately double Australia’s annual carbon emissions.
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Evidence of Crevasses Transporting Heat Deep into Greenland Ice
Crevasses are a feature of ice sheets but how deep they extend has been a mystery. Now crevasse traces have been visually identified to 265 meters in a borehole in a fast-moving outlet glacier.
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How Do Croplands Reduce CO2 During the Growing Season?
Regional variations in the seasonal drawdown of atmospheric CO2 can be used as a benchmark for evaluating models and satellite-derived estimates of land carbon uptake.
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A 2700-year Record of Permafrost Thaw Sensitivity to Climate
Changes in the 14C ages of carbon and biomarkers deposited at the mouth of a river draining a permafrost watershed track responses of regional thaw depth to past warming and cooling.
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Dry Soils Enhanced the 2018 Heatwave in Northern Europe
A range of observations show that a shift in land-atmosphere coupling exacerbated the hot drought experienced in Europe in 2018.
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How River Engineering Alters Carbon Cycling
Artificial levees in the Lower Mississippi River bypass floodplain processing and increase delivery of carbon to the ocean.
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Modeling Interactions Between Cities and Climate Across Scales
With more than half of humanity living in cities, the ability to model urban-climate interactions at relevant spatial scales is increasingly important.