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.
Editors’ Highlights
New Method to Measure Ice Cap Thickness
Naturally generated seismic waves bouncing up and down through an ice sheet can be used to determine the thickness of the ice and monitor future changes in ice thickness.
Cassini Reveals a Missing Link on Saturn’s Rotating Aurora
The bright aurorae dancing in the sky are produced by charged particles traveling along the magnetic field lines from tens of planetary radii. By why do aurorae rotate at Saturn but not at Earth?
New Definition of Potential Spicity by the Least Square Method
A thermodynamic function of the potential spicity is defined and it is orthogonal to the potential density in the least square sense.
Fog Catching for Thirsty Locales
Many arid and semi-arid regions experience very little rainfall, but quite a bit of fog, which might be a viable source of drinking water.
What Makes a Terrestrial Gamma-Ray Flash in Thunderclouds?
Two lightning flashes were observed in the same location: One produced a bright gamma-ray flash with about 1000 counts per millisecond, but the other did not.
Dolphins in Florida Show Exposure to Phthalate Contaminants
Scientists have detected exposure to phthalates among a majority of bottlenose dolphins sampled in Sarasota Bay, Florida (2016–2017), including some with levels comparable to those observed in humans.
Retrieving Tropospheric Ozone from Ground-based Spectroscopy
A new technique can retrieve the profile of ozone from surface to tropopause by MAX-DOS ground-based measurements.
Dropsondes Reveal Atmospheric Boundary Layers Over Antarctic
636 high-resolution dropsondes reveal four types of atmospheric boundary layer over the Antarctic, including well-mixed and convective types.
Polarization Measurements Probe the Physics of Lightning
A new measurement capability can detect the polarization of the radio frequency wave of lightning sources, which reveals different forms of lightning breakdown processes.