Mass spectroscopy of tree ring material indicates a sharp, single-year rise in carbon-14 concentrations consistent with an extreme solar energetic particle event that occurred around 5410 BCE.
Geophysical Research Letters
Posted inResearch Spotlights
Hydrothermal Vents May Add Ancient Carbon to Ocean Waters
Data from a long-distance research cruise provide new insights into carbon cycling in the eastern Pacific and Southern Oceans.
Posted inResearch Spotlights
Remote-Controlled Ocean Drones Observe Atmospheric Cold Pools
Novel uncrewed sailing vehicles measured properties of atmospheric cold pools in hard-to-reach regions of the central and eastern tropical Pacific Ocean.
Posted inResearch Spotlights
Particles at the Ocean Surface and Seafloor Aren’t So Different
Despite occurring on different scales, flux measurements throughout the water column share log-normal probability distributions.
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Gulf Stream Intrusions Feed Diatom Hot Spots
Previous research suggested that the intrusion of low-nutrient Gulf Stream water into the Mid-Atlantic Bight would reduce productivity, but a new study finds that it can also lead to chlorophyll hot spots.
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South Pole Ice Core Reveals History of Antarctic Sea Ice
Every summer, most of the sea ice near Antarctica melts away, but its saltiness leaves a permanent record that scientists can trace back for millennia.
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Convective Transport Explains “Missing” Ice near the Tropical Tropopause
Spaceborne lidar shows that more ice than expected is leaving the tropical tropopause layer in the atmosphere.
Posted inEditors' Highlights
The Promise of Spaceborne High Spectral Resolution Lidar
New spaceborne high spectral resolution lidar measurements provide a new view of global aerosols.
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Did the Drop in COVID-Related Emissions Affect the Climate?
Global emissions dropped markedly in 2020, due in large part to lockdowns that slowed economic and social activity, but the climate likely won’t be noticeably affected.
Posted inEditors' Highlights
Upwind Forest Buffers Rondonia Cropland Against Regional Drought
During severe Amazonia droughts when oceanic supply of moisture failed, the magnitude of rainfall reduction over Rondonia was moderated by enhanced moisture supply from upwind forests.