Geophysical Research Letters Archives - Page 15 of 61

Six graphs showing the correlation skill between the new hindcasts SEAS5-20C and the reanalysis CERA-20C.

Variability of ENSO Forecast Skill Over the 20th Century

by Suzana Camargo 21 September 20226 March 2023

El Niño Southern Oscillation (ENSO) predictability is examined in a new global coupled retrospective forecast ensemble for the 20^th Century.

Two graphs showing the distributions of lifetime size and lifetime maximum integral intensity kinetic energy.

Editors' Highlights

The Rapid Growth of Tropical Cyclones’ Outer Size – A New Concept

by Suzana Camargo 12 September 202219 January 2023

A new study focuses on the rapid growth of tropical cyclones and their destructive potential.

Editors' Highlights

Quantifying Changes in Midlatitude Subseasonal Prediction Skill

by Suzana Camargo 9 September 202230 September 2022

The differences between future and present subseasonal predictability in the Northern Hemisphere provided by the tropics are evaluated using neural networks.

Side-by-side images show fish-eye-style photographs of a starry evening sky illuminated by different subauroral events. The left image shows a SAR arc, a reddish arc that spans the sky. Beneath the arc the sky transitions from bright green at the horizon to purple and is partially obscured by clouds. The right image shows a STEVE phenomenon. Part of the red SAR arc is still visible but is much fainter and more of a pink color than its original red. The green and purple sky is more muted in color, and more stars and the band of the Milky Way are now visible. In both images, the silhouette of some shrubs is visible.

Research Spotlights

From SAR Arc to STEVE: An Atmospheric Evolution

by Alexandra K. Scammell 6 September 20227 September 2022

A new study reports the first observation of a stable auroral red arc evolving into a strong thermal emission velocity enhancement during a geomagnetic storm.

The inside of the KamLAND antineutrino detector comprises a grid of tessellated segments, parallelograms and trapezoids, that fit together to form a sphere. Each segment of the detector, which is black, has 16 sensors, which are gold, arranged in a 4 by 4 pattern. Each segment is connected by a white border. At the center of the detector, and image, is a green circle.

Research Spotlights

Estimating Uranium and Thorium Abundance with Geoneutrinos

by Morgan Rehnberg 31 August 202213 September 2025

Terrestrial electron antineutrino observations provide new constraints on the contributions of radiogenic heat in the mantle.

Yosemite National Park ecosystem featuring a stream, trees, and snow-covered hillslope.

Research Spotlights

What Drives Hillslope Connectivity?

by Aaron Sidder 23 August 202223 August 2022

Hillslopes play a critical role in linking ecosystems. Understanding the forces that drive their connections can help us to better understand adaptation in the face of climate change.

Editors' Highlights

Arctic Salinity Pushes the AMOC Swing

by Kristopher B. Karnauskas 3 August 20222 July 2024

A model of the Atlantic Meridional Overturning Circulation (AMOC), pioneered by Henry Stommel over 60 years ago, can exhibit realistic cyclic behavior if the role of Arctic salinity is included.

Diagrams showing the model fields used in the study.

Editors' Highlights

Landfalling Hurricanes Intensify Due to Coastal Downwelling

by Suzana Camargo 26 July 202221 September 2022

Hurricane winds can lead to coast downwelling, which brings warmer surface water near the coast and can contribute to the intensification of the landfalling hurricane.

Two satellite photos of the Lut Desert with arrows depicting wind-driven transport routes of sediment.

Editors' Highlights

A Unique Glimpse at Sediment Erosion and Deposition by Wind

by Valeriy Ivanov 21 July 202221 July 2022

The Lut Desert in Iran is an exceptional natural laboratory to study how wind moves sediment across the landscape. A new study quantifies erosional and depositional sediment fluxes of the desert.

Map of Alaska showing the study regions and a bar graph showing wildfire events by year.

Editors' Highlights

Lightning in Alaskan Tundra Ignites Most Fires

by Valeriy Ivanov 19 July 202211 August 2022

Cloud-to-ground lightning is found to be the most important controller of wildfire occurrence in the Artic tundra of Alaska from 2001 to 2019.

Geophysical Research Letters

Variability of ENSO Forecast Skill Over the 20th Century

The Rapid Growth of Tropical Cyclones’ Outer Size – A New Concept

Quantifying Changes in Midlatitude Subseasonal Prediction Skill

From SAR Arc to STEVE: An Atmospheric Evolution

Estimating Uranium and Thorium Abundance with Geoneutrinos

What Drives Hillslope Connectivity?

Arctic Salinity Pushes the AMOC Swing

Landfalling Hurricanes Intensify Due to Coastal Downwelling

A Unique Glimpse at Sediment Erosion and Deposition by Wind

Lightning in Alaskan Tundra Ignites Most Fires

Features from AGU Publications

The Economic Costs of Solar Storms

Unveiling Atmospheric Circulation on Mars with Magnetic Field Data

AGU Launches New Special Collection at the Nexus of Science and Policy