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Geophysical Research Letters

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An illustration of rainfall estimates from ground-based radar and spaceborne Tropical Rainfall Measuring Mission (TRMM) radar
Posted inEditors' Highlights

Machine Learning Improves Satellite Rainfall Estimates

by Valeriy Ivanov 31 October 201925 July 2022

A new deep learning approach bridges ground rain gauge and radar data with spaceborne radar observations of Tropical Rainfall Measuring Mission to improve precipitation estimation.

Maps showing flooding near Houston after Hurricane Harvey in 2017
Posted inEditors' Highlights

Future Remote Sensing Mission Holds Promise for Flood Monitoring

by Valeriy Ivanov 28 October 20191 December 2022

The 2021 Surface Water and Ocean Topography (SWOT) mission will measure water surface elevation, slopes, and inundations of rivers as narrow as 50 meters.

Aerial view of the San Andreas Fault in California on the Carrizo Plain
Posted inResearch Spotlights

Earthquake Statistics Vary with Fault Size

Aaron Sidder, freelance science writer by Aaron Sidder 21 October 20197 October 2022

A theoretical study explores why small earthquake sources can produce quasiperiodic sequences of identical events, whereas earthquakes on large faults are intrinsically more variable.

Graph showing temperatures in four different depth layers over time
Posted inEditors' Highlights

CAT Pictures of Internal Solitary Waves in Indonesian Strait

by J. Sprintall 7 October 201927 January 2023

Huge and rapid subsurface temperature changes associated with propagating internal solitary waves were observed from a moored coastal acoustic tomography (CAT) system in Lombok Strait in Indonesia.

Graphs showing anomalies in the zonal wind in different time periods
Posted inEditors' Highlights

Polar Stratosphere Resolves North Atlantic Jet “Tug of War”

by Alessandra Giannini 25 September 201929 March 2022

Getting the polar stratosphere right is critical in the simulation of North Atlantic climate change, which is shaped by the interaction of Arctic Amplification and tropical upper tropospheric warming.

Observed ion energy and time-of-flight spectra in Jupiter's northern and southern hemisphere
Posted inEditors' Highlights

First Inside Look at Hot and Cold Ions in Jupiter’s Ionosphere

by Andrew Yau 23 September 201911 August 2022

The first in-situ ion observations from NASA’s Juno spacecraft reveal the surprising, simultaneous presence of cold protons and hot oxygen and sulfur ions in the high-latitude ionosphere of Jupiter.

Ice on the Bering Sea, which has experienced unprecedentedly low winter sea ice levels in recent years
Posted inResearch Spotlights

As Arctic Sea Ice Disappears, What Happens to Ecosystems?

Kate Wheeling, freelance science writer by Kate Wheeling 20 September 201915 November 2021

The northern Bering Sea is experiencing record-setting low winter sea ice levels, which are impacting plankton, fish, and other animals in the region.

Map of southern California showing relationship between observed foreshock prevalence and magnitude of completeness
Posted inEditors' Highlights

Most Southern California Mainshocks Follow Foreshocks

by G. P. Hayes 19 September 20196 October 2021

New research using a highly complete earthquake catalog shows that 72% of M4+ mainshocks are preceded by foreshocks, implying that foreshock activity is much more prevalent than previously thought.

Structure of hydrous eutectic silicate melts at different temperatures and pressures
Posted inEditors' Highlights

Hiding Deep Hydrous Melts at the Core-Mantle Boundary

by S. D. Jacobsen 13 September 20194 August 2023

Silicate melts containing H2O in the lowermost mantle are surprisingly dense and may stagnate there, trapping primordial volatiles and potentially causing some of the ultra-low velocity zones.

Time-of-flight (TOF) spectra of observed ions on the Arase satellite on 4 April 2017
Posted inEditors' Highlights

Molecular Ions Unexpectedly Frequent in Earth’s Magnetosphere

by Andrew Yau 11 September 201913 April 2022

A Japanese satellite reveals rapid and surprisingly frequent transport of molecular ions from the ionosphere to the magnetosphere, under not only extreme but also moderate geomagnetic conditions.

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