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precipitation

World map showing the difference of a metric of extreme hot days between two periods
Posted inEditors' Highlights

A New Dataset of Temperature and Precipitation Extremes

by Minghua Zhang 8 September 202013 February 2023

HadEX3 is an updated dataset of gridded temperature and precipitation extremes, that covers the period of 1901 to 2018 and has improved spatio-temporal coverage.

Snout of a mountain glacier with terminal moraine
Posted inNews

Precipitation Plays a Key Role in Glacial Erosion

Javier Barbuzano, Science Writer by Javier Barbuzano 10 March 202024 February 2022

After comparing the climatic conditions at dozens of glaciers worldwide, researchers find that precipitation, not temperature, is the leading environmental factor driving glacial erosion.

Model of cloud development, charge evolution, and cloud-to-ground lightning initiation in Hokuriku winter clouds
Posted inEditors' Highlights

Microphysics and Positive Lightning in Hokuriku Winter Clouds

by Minghua Zhang 27 December 20199 March 2023

The microphysics of the frequent, and frequently positive, lightning of Hokuriku winter clouds was investigated by systematic, in situ observation of individual precipitation particle type and charge.

Satellite image showing a band of clouds stretching across the western Pacific Ocean to California
Posted inNews

Atmospheric Rivers Have Different “Flavors”

by A. Remmel 24 December 201930 January 2024

New research is helping scientists understand why moisture-laden atmospheric rivers of similar intensities have different effects on land.

Charts showing seasonal cycles of events caused by precipitation on snow
Posted inEditors' Highlights

Atmospheric Rivers Trigger Heavy Snowmelt in Western USA

by Valeriy Ivanov 13 December 201930 January 2024

A rare atmospheric phenomenon that transports large quantities of water vapor into the coastal watersheds of the western USA is responsible for up to 10–20% of intense snowmelt events in the region.

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.

Muscovite in polarized light
Posted inNews

Ancient Precipitation Reveals Clues About Mountains and Climate

Katherine Kornei, Science Writer by Katherine Kornei 17 September 20192 March 2023

By studying the chemical signatures of 300-million-year-old precipitation, researchers find evidence that the supercontinent Pangea contained peaks as tall as the European Alps.

Vinícius Mendes collects a sediment sample from a former river terrace of the Parnaíba River in Brazil.
Posted inResearch Spotlights

A New Proxy for Past Precipitation

Kate Wheeling, freelance science writer by Kate Wheeling 16 September 201910 February 2023

Researchers used luminescence signals from marine sediment cores to bolster estimates of precipitation levels on land over the past 30,000 years.

Schematic showing 4 difference scenarios in which atmospheric rivers affect the surface water budget
Posted inEditors' Highlights

Hydrological Footprint of Atmospheric Rivers on Land

by Minghua Zhang 10 September 201930 January 2024

Atmospheric rivers that make landfall in the western United States have significant impacts on the surface water balance, sharpening the seasonality of water resources in coastal watersheds.

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.

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