12/6/2023: Mars has a mini-magnetosphere

Registration to #AGU23, held 11-15 December at the Moscone Center in San Francisco, is free for credentialed members for the press and student journalists. Credit: Shen Pan/unsplash

AGU Annual Meeting: next week in San Francisco!

AGU23 is approaching! Press registration remains open for the duration of the conference. The press event schedule, recommended sessions and tipsheets will be available shortly. For media advisories, head over to the AGU Newsroom and search for posts tagged AGU23. We’ll be posting everything there.
AGU23 press center][AGU23 press registration][AGU23 announcements in the Newsroom] 

Featured Research

Mars has a mini-magnetosphere
A mini-magnetosphere, similar to the one found on Venus, has been observed above Mars by NASA’s MAVEN mission. Unlike Venus, whose magnetosphere is solely generated from the clashing of solar wind particles against the planet’s ionosphere, Mars also possesses inherent magnetic fields near its crustal surface that shield parts of the planet from solar winds. This combination of intrinsic and induced properties makes Martian solar defenses unique to the Solar System.
[Geophysical Research Letters research] 

The Amazon is getting drier
The southern Amazon is getting drier, decreasing its ecological health and ability to balance global hydrological and energy cycles. The trend will likely continue, a new study finds, as 2040-2070 is expected to be about 20% drier than the recent historical period. [JGR Atmospheres research] 

California regions prone to clusters of atmospheric rivers
Atmospheric rivers, or long narrow regions that transport water vapor, can arrive one after the other, in clusters and with compounding negative effects. While both the Pacific Northwest and California experience atmospheric rivers, mountainous regions in California tend to get more clusters that also last longer, a new study finds. [JGR Atmospheres research] 

How crabs engineer salt marshes
When fiddler crabs burrow, they create tunnels that speed up groundwater and salt circulation, promoting the export of carbon and nitrogen from salt marshes to the ocean. This process, which is vital for healthy plant production, can vary based on the shape of the burrows and the number of entrances that are dug, a new study finds.
[Water Resources research] 

Some high-threat volcanoes are severely understudied
Scientists have little understanding of where magma is stored along the Cascade Volcanic Arc or how its volcanoes could affect population centers. [Geochemistry, Geophysics, Geosystems research] [Eos Research Spotlight] 

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