A new model quantifies the relative contributions of denitrification and other processes of nitrogen uptake, such as by plants, from groundwater in riparian areas around streams.
isotopes
Posted inResearch Spotlights
Oceans Vented Carbon Dioxide During the Last Deglaciation
A new boron isotope record from South Pacific marine sediments offers a more complete picture of ocean-atmosphere carbon dioxide exchange during the late Pleistocene.
Posted inNews
Ancient Water Underlies Arid Egypt
A hidden trove of groundwater is left over from the last ice age.
Posted inEditors' Highlights
What American Samoan Corals Tell About El Niño’s History
Samoan corals record how patterns of warm/cool and more/less salty in the equatorial Pacific changed in space and time over the last 500 years.
Posted inResearch Spotlights
How Ice Rafting Events Affect Asian Monsoon Hydroclimate
Cave stalagmites provide isotopic evidence that Bond events and Heinrich events have more variable effects on Asian monsoon hydroclimate during the last glacial period than during the Holocene.
Posted inResearch Spotlights
First Near-Global Measurements of Isotopic Nitrous Oxide
By harnessing satellite data collected from low-Earth orbit, scientists can now track the distribution of atmospheric nitrous oxide and its isotopes.
Posted inAGU News
Cerling and Ehleringer Receive 2017 Excellence in Earth and Space Science Education Award
Thure Cerling and James Ehleringer received the 2017 Excellence in Earth and Space Science Education Award at the American Geophysical Union Fall Meeting Honors Ceremony, held on 13 December 2017 in New Orleans, La. The award honors “a sustained commitment to excellence in geophysical education by a team, individual, or group.”
Posted inScience Updates
Stable Isotopes in Paleoclimate Reanalysis
Second Annual Workshop of the Last Millennium Reanalysis Project; Friday Harbor, Washington, 25–26 October 2016
Posted inAGU News
Ellen R. M. Druffel Receives 2016 Roger Revelle Medal
Ellen R. M. Druffel was awarded the 2016 Roger Revelle Medal at the American Geophysical Union Fall Meeting Honors Ceremony, held on 14 December 2016 in San Francisco, Calif. The medal is for "outstanding contributions in atmospheric sciences, atmosphere-ocean coupling, atmosphere-land coupling, biogeochemical cycles, climate or related aspects of the Earth system."
Posted inAGU News
Alex Halliday Receives 2016 Harry H. Hess Medal
Alex Halliday was awarded the 2016 Harry H. Hess Medal at the American Geophysical Union Fall Meeting Honors Ceremony, held on 14 December 2016 in San Francisco, Calif. The medal is for "outstanding achievements in research on the constitution and evolution of the Earth and other planets."