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Susan Trumbore

Posted inEditors' Highlights

How Can We Sample More Ethically?

by Susan Trumbore 9 January 20239 January 2023

Ryan-Davis and Scalice describe a path towards sampling more ethically, going beyond legal permitting requirements to engagement of Indigenous expertise and respect of peoples’ relationship to place.

Posted inEditors' Highlights

A Drier or Wetter Future for Southwestern North America?

by Susan Trumbore 31 December 202226 January 2023

Bhattacharya et al. present evidence that expansion of the North American Monsoon explains a wetter southwest in the mid-Pliocene and suggest this mechanism can explain current monsoon variations.

Posted inEditors' Highlights

Origin of Dawnside Subauroral Plasma Flows in Geomagnetic Storms

by Susan Trumbore 12 September 202218 October 2022

Geomagnetic storms induce fast plasma flows next to the aurora and affect space weather. Lin et al. explain the origin of a special “dawnside” plasma stream that occurs only during extreme storm events.

Posted inEditors' Highlights

New Tool to Decipher Past Upper Troposphere Temperatures

by Susan Trumbore 9 August 202230 August 2022

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.

Posted inEditors' Highlights

What Caused the Open Habitat Transition in the West-Central U.S.?

by Susan Trumbore 10 March 202212 April 2022

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.

Posted inEditors' Highlights

What Conditions Accompanied the Late Ordovician Mass Extinction?

by Susan Trumbore 20 January 202230 January 2023

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.

Posted inEditors' Highlights

Tracking from Space how Extreme Drought Impacts Carbon Emissions

by Susan Trumbore 12 December 202112 December 2021

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.

2-D representation of 360-degree borehole images from about 34 and 80 meters deep showing several identified crevasse traces
Posted inEditors' Highlights

Evidence of Crevasses Transporting Heat Deep into Greenland Ice

by Susan Trumbore 3 June 202111 January 2022

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.

Two maps of North America showing patterns of CO2 uptake by photosynthesis during the growing season based on two different models of atmospheric CO2 variations.
Posted inEditors' Highlights

How Do Croplands Reduce CO2 During the Growing Season?

by Susan Trumbore 20 May 202128 September 2021

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.

Plots showing probability distributions derived from measurements of 14C in long-chain fatty acids
Posted inEditors' Highlights

A 2700-year Record of Permafrost Thaw Sensitivity to Climate

by Susan Trumbore 5 May 20219 December 2021

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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