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Alessandra Giannini

Editor, GRL

Photo of Earth from afar.
Posted inEditors' Vox

Challenges in Evaluating Climate Sensitivity from Climate Models

by Harihar Rajaram, Suzana Camargo, Alessandra Giannini and Hui Su 1 May 20241 May 2024

In recognition of the 50th anniversary of Geophysical Research Letters, the editors showcase an exceptional study published in the journal that investigates the climate sensitivity in CMIP6 models.

Graphs from the paper.
Posted inEditors' Highlights

A New Look at the Changing Water Cycle Over Land

by Alessandra Giannini 29 May 202324 May 2023

Whether warming increases or decreases, rain over land depends on the relationship of soil moisture, evaporation, and aridity which shape rain regimes.

Three maps of the United States with different colored data points.
Posted inEditors' Highlights

Explaining Uncertainty in Estimates of Rain Response to Warming

by Alessandra Giannini 13 July 202225 July 2022

Humidity increases with warming. Theory and observations about how increased humidity translates into more extreme rainfall can be reconciled if attention is paid to data and methods.

Plot showing the latitudinal dependence of Clausius-Clapeyron scaling.
Posted inEditors' Highlights

Rainfall Change with Warming More Consistent than Anticipated

by Alessandra Giannini 26 February 202114 October 2021

Dew point temperature better explains precipitation change with warming than temperature itself, and the relation is more spatially coherent than previously thought.

Map of the mid Atlantic showing comparison between models and observations of where Saharan dust deposition occurs
Posted inEditors' Highlights

Saharan Dust Reaching the Americas Comes from El Djouf

by Alessandra Giannini 28 August 20202 February 2022

The Saharan dust that crosses the Atlantic and fertilizes the Amazon may be coming from the El Djouf region between Mauritania and Mali, which is farther west than previously thought.

Map of the world showing trajectories that transport water from the Atlantic to the Pacific Ocean
Posted inEditors' Highlights

A New Perspective on a Classic Climate Conundrum

by Alessandra Giannini 6 August 202012 January 2022

The Lagrangian method applied to tracking water transport between the Atlantic and Pacific basins reveals a larger contribution by mid-latitude westerly winds across Eurasia than previously thought.

Graphs showing how accurately four different models predict seasonal climate change.
Posted inEditors' Highlights

Extreme Summer Heat over Europe Is Predictable Week-to-Week

by Alessandra Giannini 26 November 201914 February 2023

Forecasts made one to a few weeks in advance, known as “subseasonal to seasonal” predictions, show more skill in predicting extreme summer heat waves over Europe than spells of normal or cold weather.

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.

Graphs showing correlations between satellite retrievals (GPROF) and ground-based (MRMS) observations of precipitation
Posted inEditors' Highlights

Accounting for the Fact that Snow Falls Slower than Rain

by Alessandra Giannini 26 August 201911 August 2022

When calibrating satellite observations with ground-based ones, estimated precipitation rates are improved by considering that snow takes longer to fall compared to rain.

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

Features from AGU Publications

Research Spotlights

Proposed Experiment Could Clarify Origin of Martian Methane

12 May 202512 May 2025
Editors' Highlights

First Benchmarking System of Global Hydrological Models

7 May 20257 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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