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P. Kumar

Aerial view of patchwork agricultural fields in Illinois
Posted inScience Updates

Critical Agents of Change at Earth’s Surface

by P. Kumar, E. Herndon and D. D. Richter 29 September 202025 March 2022

By way of agriculture and industry, humans have major influences on the critical zone. Our past and present effects on the landscape, soil, and water will echo for a long time to come.

A hilly landscape in the Reynolds Creek Critical Zone Observatory, with charred soil in the foreground.
Posted inScience Updates

Soil Signals Tell of Landscape Disturbances

by K. A. Lohse, Sharon Billings, R. A. DiBiase, P. Kumar, A. A. Berhe and J. Kaye 24 September 202022 November 2021

The lasting influence humans have on Earth’s critical zone—and how geologic forces have mediated those influences—is revealed in studies of soil and carbon migration.

A view of a bridge, with the New Orleans skyline visible in the distance between the bridge and the water. A purple tint, a teal curved line representing a river, and the text “#AGU25 coverage from Eos” overlie the photo.

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