Browse Journal Highlights
What Regions Are Most at Risk for Ice Loss in East Antarctica?
From Eos.org: Research Spotlights—Scientists model the impact of environmental warming on ice drainage basins in the less studied East Antarctica. The environment of Antarctica is unique in many ways, one being that the continent is covered almost entirely by a vast sheet of ice, stretching from the.... more
Last remnant of North American ice sheet likely to disappear in 300 years
Joint Press Release—The last remaining piece of the vast ice sheet that once covered North America is doomed to vanish in the next few centuries, a new study finds. Rising temperatures in the Arctic have caused the Barnes Ice Cap to melt at an extraordinary pace, and nothing short of removing carbon.... more
Ice in Ceres’ shadowed craters linked to tilt history
Blog Post—Dwarf planet Ceres may be hundreds of millions of miles from Jupiter, and even farther from Saturn, but the tremendous influence of gravity from these gas giants has an appreciable effect on Ceres’ orientation. In a new study, researchers from NASA’s Dawn mission calculate that the axial tilt.... more
Why Do Great Earthquakes Follow Each Other at Subduction Zones?
From Eos.org: Research Spotlights—A decade of continuous GPS measurements in South America indicate that enhanced strain accumulation following a great earthquake can initiate failure along adjacent fault segments. Recently, seismologists have recognized that great subduction zone earthquakes, also.... more
A new record of Atlantic sea surface salinity from 1896-2013 reveals the signatures of climate variability and long-term trends
Editors’ Highlight—This is an original observational study investigating long trends and decadal variability of Atlantic sea surface salinity (SSS). Based on a new dataset covering the North Atlantic over the period 1896-2013, the authors show that subpolar SSS varies in phase with the Atlantic Multidecadal.... more
Is There a Stratospheric Pacemaker Controlling the Daily Cycle of Tropical Rainfall?
Editors’ Highlight—This paper considers the impact of large-scale tidal forcing on the 12-hour variation of tropical rainfall. Through a set of climate model experiments, in which the diurnal cycle of solar heating is selectively suppressed below and above the tropopause, the authors investigate the.... more
CO2-vegetation feedbacks and other climate changes implicated in reducing baseflow
Editors’ Highlight—This paper quantifies climate- and vegetation-driven changes to the hydrological cycle across eastern Australia. The authors provide a comprehensive analysis of catchment-scale trends across an aridity gradient. They show that reductions in baseflow (groundwater flow to streams) can.... more
Diurnal atmosphere-ocean signals in Earth's rotation rate and a possible modulation through ENSO
Editors’ Highlight—This paper takes a mixed torque/angular momentum approach to study the effect of the S1 atmosphere/ocean tide on length-of-day. The authors show that the amplitude and phase of the S1 tide is modulated with the modulation being related to the ENSO phenomena. The results are surprising..... more
Study finds “hotspots” of airborne ammonia over world’s major agricultural areas
Joint Press Release, Washington, DC—The first global, interdecadal satellite study of airborne ammonia gas has revealed “hotspots” of the pollutant over four of the world’s most productive agricultural regions. Using data from NASA’s Atmospheric Infrared Sounder (AIRS) satellite instrument, the research.... more
Volcanic eruption expanded ozone hole to record size
Blog—On April 22, 2015, the Chilean volcano Calbuco erupted, spewing volcanic ash 10 kilometers (six miles) skyward. But Calbuco didn’t just tear a hole in the Earth that day. A new study suggests it also tore a hole in the sky. The new study argues that Calbuco’s eruption stretched the Antarctic Ozone.... more
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Featured Special Collection
The Magnetospheric Multiscale (MMS) mission has been performing particle and electromagnetic field measurements in the near-Earth environment since its launch in March 2015. Thanks to data with unprecedented time resolution on four identical spacecraft in a close tetrahedron configuration (down to 10 km), MMS science goals are to probe and understand the electron-scale physics involved in the magnetic reconnection process. This collection provides a selection of key results obtained during the first phase of the mission at the dayside magnetopause. It includes new observations of the geometry and variability of the reconnection process, the detailed dynamics of particles, fields and waves in the vicinity of the reconnection region, the observation of small-scale signatures at current sheets formed in the magnetosheath, in Kevlin-Helmholtz vortices, or flux transfer events, as well as other small-scale features which are by-products of magnetic reconnection or not. These results open a new window for our understanding of magnetic reconnection in space, with direct and numerous implications for astrophysical and laboratory plasmas.