Santiago Gassó
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sangasso.bsky.social
Santiago Gassó
@sangasso.bsky.social

Research on atmospheric aerosols w/satellites & models.
Sharing and commenting on papers and sat images of (my) interest
Documenting on #highlatitudedust & #volcanotracks events.
Atmos-ocean exchange processes, Atmos. polarization radiative transfer .. more

Environmental science 44%
Engineering 19%
Pinned
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Below is an old self-introduction and description of what I have fun with (professionally speaking) .

The times are quite different than when I posted this, but well, we are still here, chugging along and hoping for the best.
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Hello all, there are a lot of new people here so I thought of re-introducing myself. I am a Earth Observation (EO) aerosol scientist contracted to work for the only agency that has put people on the moon.
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In addition there is dust activity in ElPaso/Ciudad Juarez area, no too obvious in images but it is sort of visible through the cirrus.

@tomgillpredicts.bsky.social

Strong, gusty winds kick up blowing dust across the Plains and elongate smoke plumes from raging wildfires.

Reposted by Santiago Gassó

Strong, gusty winds kick up blowing dust across the Plains and elongate smoke plumes from raging wildfires.

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🌍🔬 Microplastics are everywhere — from the ocean surface to the lower atmosphere and beyond.

Measuring them? Complex. Challenging. Evolving.

Join SOLAS Seminar XII
🗓 16 March 2026 | 🌐 Online
✨ Register now: zoom.us/meeting/regi...
ℹ️ Details: solas-int.org/events/solas...

dinner or tea time?

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2 distinctive #highlatitudedust clouds in SW Atlantic today.

One from dry lake Colhue Huapi, dust can be seen very well from a webcam in Comodoro Rivadavia.

The second dust cloud (yellow ) is from earlier dust activity from mudflats along the shore of Deseado river (visible in earlier image)

Reposted by Santiago Gassó

🌍🔬 Microplastics are everywhere — from the ocean surface to the lower atmosphere and beyond.

Measuring them? Complex. Challenging. Evolving.

Join SOLAS Seminar XII
🗓 16 March 2026 | 🌐 Online
✨ Register now: zoom.us/meeting/regi...
ℹ️ Details: solas-int.org/events/solas...

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📰 February Newsletter is out!
Catch up on the latest updates, deadlines, and upcoming events.
mailchi.mp/xmu/solas-ne...

#Solas #newsletter

Reposted by Santiago Gassó

📰 February Newsletter is out!
Catch up on the latest updates, deadlines, and upcoming events.
mailchi.mp/xmu/solas-ne...

#Solas #newsletter

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Catchy title for a study on the simulation of non-spherical #aerosol optical properties . Published in an astronomy journal, but the technique is aplicable to atmospheric (ie. Earth) aerosols.

academic.oup.com/mnras/articl...
Aerosols are not spherical cows: using discrete dipole approximation to model the properties of fractal particles
ABSTRACT. The optical properties of particulate-matter aerosols, within the context of exoplanet and brown dwarf atmospheres, are compared using three diff
academic.oup.com

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GESAMP report on #microplastics transport into the marine environment is available online.

library.wmo.int/records/item...

@solas-ipo.bsky.social @usocb.bsky.social @geotraces.bsky.social

I think it was related to some laser toys....

🛰️🌋activity today in the South Atlantic. Zadovoski (red) and Saunders (green) islands volcanoes, both active today . Minor activity . They are active because each created a #volcanotrack in the cloud deck above them.

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The #dust we miss

Late afternoon with an almost totally cloudy Patagonia yesterday.

But in between clouds, there was significant #highlatitudedust activity.
However, there are no sensors there, no satellite information (mostly cloudy) ,so we do not know how long or how much this event was.

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Publication highlight: Kong, K.P., Yang, S.-C., Barone, B., et al. (2026). Surface water iron deposition histories and the initiation of phytoplankton blooms in the North Pacific Subtropical Gyre. Global Biogeochem. Cycles, 40, e2025GB008499. doi.org/10.1029/2025...

Actually I misidentified the #highlatitudedust source. I am not sure that the sources in the mud-flat were active, but certainly the dry Laguna Blanca was emitting a lot of dust (arrow) and likely it is the source of most of the haze.

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Few hours later in the early morning GOES image, there is haze well into the sub-Antarctic waters. The MODIS-Terra overpass (1 hour later) detects the haze as aerosol in moderate quantities (for this region). Eventually it will deposit over the ocean and snow.

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Few hours later in the early morning GOES image, there is haze well into the sub-Antarctic waters. The MODIS-Terra overpass (1 hour later) detects the haze as aerosol in moderate quantities (for this region). Eventually it will deposit over the ocean and snow.

🛰️🌬️🌊

#highlatitudedust activity yesterday in one of the southernmost dust source in the world, the mudflats at St. Sebastian bay in #TierradelFuego

Here the source is not visible but there was a clear extended dust cloud well into the #SouthernOcean

@solas-ipo.bsky.social

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Precipitation is a key factor in glacier survival.

In a warmer world , there is more moisture in the air thus more precipitation in solid form in high latitudes . So, there can be scenarios where some glaciers can survive. Study
www.nature.com/articles/s41...

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Glaciers are expected to melt within a generation .

www.nature.com/articles/s41...

One consequence not noted in this study is the increase in #dust blowouts to the glacier silt left after the melt. Versions of this is already happening as #highlatitudedust activity in #Iceland and #Alaska.
Peak glacier extinction in the mid-twenty-first century - Nature Climate Change
Many mountain glaciers will disappear with warming. Here the authors assess how many glaciers will disappear per year under different warming scenarios, finding that a peak in glacier loss will happen...
www.nature.com

Reposted by Santiago Gassó

Publication highlight: Kong, K.P., Yang, S.-C., Barone, B., et al. (2026). Surface water iron deposition histories and the initiation of phytoplankton blooms in the North Pacific Subtropical Gyre. Global Biogeochem. Cycles, 40, e2025GB008499. doi.org/10.1029/2025...

#highlatitudedust activity this morning in central #Patagonia, partly cloudy but still visible in both 🛰️ and webcam images at the coast by Comodoro Rivadavia

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#highlatitudedust activity yesterday in the southern S. America. Dry lakes emit dust in concert, making an important contribution to the area given that it is so pristine that even small amounts make a different.
Strong winds bring dust even to Antarctica and well into the Southern Ocean.

Reposted by Santiago Gassó

Reposted by Santiago Gassó

WHO technical brief: Understanding the health impacts of sand and dust storms. Geneva: World Health Organization; 2025 (Air Quality, Energy and Health Science and Policy Summaries). doi.org/10.2471/B09453
Understanding the health impacts of sand and dust storms: technical brief
doi.org

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Volcanic activity in Saunders and Zadovoski Is in the S. Atlantic.

This is minor activity & plumes do not have enough buoyancy to get through the cloud deck. The activity is only apparent in the change in reflective properties in clouds, only visible in the near-IR channels.
#volcanotrack

It also points to a wet deposition event which reinforces the importance of rain in the marine environment as a delivery mechanism in large quantities.

Reposted by Peter Jacobs

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A study that looks into airborne sources of nutrients in an ocean bloom.

It finds that deposition occurred 1 month prior to the bloom. This fact is probably one of the reasons why finding causality deposition-bloom is so difficult to demonstrate.

agupubs.onlinelibrary.wiley.com/doi/full/10....
Surface Water Iron Deposition Histories and the Initiation of Phytoplankton Blooms in the North Pacific Subtropical Gyre
The concentration of iron measured within a phytoplankton bloom was higher than that measured in the absence of a bloom Modeling suggests that a wet deposition event delivered a considerable amou...
agupubs.onlinelibrary.wiley.com

Reposted by Santiago Gassó