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water cycle

Twilight in the Tapajós National Forest, seen from an observation tower
Posted inResearch Spotlights

A Simplified Model of Water Vapor Exchange in the Amazon

Aaron Sidder, freelance science writer by Aaron Sidder 27 March 20195 September 2023

Evapotranspiration is the exchange of water vapor between land and the atmosphere, and it is hard to measure and model. A new study shows promise for its estimation over large, vegetated landscapes.

Posted inEditors' Highlights

Using Radioactive Tracers to Determine the Ages of Streamflow

by Ilja van Meerveld 18 March 20197 March 2022

Radioactive isotope tracers can be used to determine the relationship between the ages of water that is stored in soil and bedrock, water in streams, and the water used by vegetation.

Dry Creek in South Australia, flooded after a heavy rain
Posted inResearch Spotlights

Balancing Robustness and Cost in Hydrological Model Optimization

by E. Underwood 6 February 201930 March 2023

A new study presents a framework for finding the best optimization algorithm.

Posted inEditors' Vox

Peering into Pores: What Happens When Water Meets Soil?

by C. Zhang and N. Lu 28 January 20193 December 2021

New research sheds light on the long-standing puzzle of how and why soil water density differs from free water density.

A view of Yellowknife Bay in Mars’s Gale crater
Posted inResearch Spotlights

Researchers Bring Early Martian Water Chemistry to Life

Sarah Stanley, Science Writer by Sarah Stanley 25 January 20193 January 2023

Lab experiments constrain conditions necessary for a key mineral to have formed in ancient lagoons and a crater lake.

A boreal landscape in northern Sweden, the focus of new research on the carbon cycle
Posted inResearch Spotlights

Organic Particles Affect Carbon Cycling in Boreal Waters

Aaron Sidder, freelance science writer by Aaron Sidder 2 January 201928 March 2023

Dissolved organic carbon receives much of the focus in aquatic research, but a new study suggests that bulkier particulate matter may play a significant role in regulating carbon dioxide emissions.

Posted inAGU News

Wada Receives 2018 Hydrologic Sciences Early Career Award

by AGU 12 November 20187 April 2023

Yoshihide Wada will receive the 2018 Hydrologic Sciences Early Career Award at AGU’s Fall Meeting 2018, to be held 10–14 December in Washington, D. C. The award “acknowledges early career prominence and promise of continued contributions to hydrologic science.”

Posted inEditors' Highlights

Massive Scale Evaporative Water Losses from Irrigation

by D. Scott Mackay 21 September 20189 May 2022

Evaporation can demonstrate the effects of crop irrigation on decadal trends in evapotranspiration at a regional spatial extent.

Researchers examine cosmic ray neutron probes to measure soil moisture
Posted inResearch Spotlights

Studying Soil from a New Perspective

by S. Witman 18 June 201811 August 2022

Cosmic ray neutrons probe soil moisture in the Great Plains.

Posted inEditors' Highlights

Calibrating Hydrological Models by Satellite

by Marc F. P. Bierkens 2 May 20189 February 2023

Hydrological models are usually calibrated using observations of streamflow, but a new method uses remotely sensed land surface temperature for this purpose.

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

A Decade of Carbon Dioxide Data from Space Gets an Upgrade

30 October 202630 October 2026
Editors' Highlights

Connecting Radio Wave Disruption to “Hot” Charged Particles from Afar

30 October 202630 October 2026
Editors' Vox

Opening Access to Earth Observation Data for Disaster Mitigation

21 October 202620 October 2026
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