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dust

An aerial image of the windswept surface of Mars. The ground is rusty red with blacker sediment curling across the image in the form of dunes. A dusting of white snow accentuates the ridges of large and small scale dunes.
Posted inNews

Mars’s Dust Cycle Controls Its Polar Vortex and Snowfall

by Kimberly M. S. Cartier 1 April 20221 April 2022

On Earth, the water cycle is a dominant climate force. On Mars, it’s the dust.

The Amazon Tall Tower Observatory is a joint Brazilian-German research station with a 325-meter tower making environmental observations in the Amazon.
Posted inFeatures

Africa’s Earth, Wind, and Fire Keep the Amazon Green

by J. Besl 23 March 202225 March 2022

Jet streams sprinkle North African dust over the Amazon, providing the rain forest with much needed nutrients. Changing wind patterns and increasing smoke may shift the system.

Lofted dust layers over the Andes mountains
Posted inNews

Iodine-Laden Desert Dust Is Eating at Ozone Pollution

by Jackie Rocheleau 28 February 202228 February 2022

In a happy accident, scientists found a potential solution to an atmospheric chemistry mystery. Their findings could be a missing piece in the iodine cycle and in atmospheric models.

A dust storm that hit Phoenix in 2011
Posted inResearch Spotlights

Rethinking How Valley Fever Spreads

by Saima Sidik 20 January 20222 February 2022

Scientists have long assumed that dust storms lead to infections with the desert soil fungus Coccidioides, but new evidence suggests otherwise.

Satellite view of frosty sand dunes on Mars
Posted inScience Updates

Planetary Dunes Tell of Otherworldly Winds

by Timothy N. Titus, Serina Diniega, Lori K. Fenton, Lynn Neakrase and James Zimbelman 22 December 202116 February 2022

On Earth and throughout our solar system, ripples and dunes in sand and dust offer insights into how winds blow, liquid currents flow, and solid particles fly and bounce over the terrain.

A line of giant stone moai from Rapa Nui (Easter Island).
Posted inNews

Settlement of Rapa Nui May Have Been Doomed by a Dearth of Dust

by Rachel Fritts 16 December 202121 March 2022

Rapa Nui and Hawai‘i offer a tale of two island settlements: Hawai‘i was close enough to Asia for continental dust to help replenish soil nutrients depleted by agriculture. Rapa Nui wasn’t.

Plot showing measured atmospheric dust concentrations on 24 buoy filters, aerosol optical depth, and precipitation for two buoys.
Posted inEditors' Highlights

Seasonality in Saharan Dust Across the Atlantic Ocean

by P. Yang 26 August 20212 February 2022

The first time series of bi-weekly dust concentrations measured in-situ across the remote Atlantic Ocean.

Image of dark linear features on the surface of Mars known as recurring slope lineae
Posted inEditors' Highlights

After the Dust Cleared: New Clue on Mars’ Recurring Slope Lineae

by A. Deanne Rogers 8 April 20212 February 2022

An imaging campaign after the 2018 planet-encircling dust storm on Mars revealed a significant increase in detections of enigmatic recurring slope lineae and new insights into how they might form.

Satellite image of dust carried from China into the north Pacific
Posted inNews

Dust on the Wind

by Nancy Averett 17 February 20212 February 2022

A new study confirms that an important wind system is shifting due to climate change.

Plot showing X-Ray Diffraction patterns for products from Mars chamber electrostatic discharge experiments using hydrated magnesium sulfate salt starting materials.
Posted inEditors' Highlights

Martian Dust Activities Induce Electrochemistry

by M. Schmidt 7 January 20212 February 2022

Amorphous materials generated from sulfur and chloride salts by electrostatic discharge in a Mars chamber suggest widespread electrical processes during dust activities.

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