Santiago Gassó
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sangasso.bsky.social
Santiago Gassó
@sangasso.bsky.social
Research on atmospheric aerosols w/satellites, models & impacts such as atmos-ocean exchange processes (SOLAS!). Atmos. polarization radiative transfer, #physics overall. Sharing and commenting on papers and sat images of (my) interest #highlatitudedust
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.
1/8
At the agency known for putting people on the Moon, nobody that I know is going.
November 24, 2025 at 12:18 AM
It seems like it is not a good day for monitoring for glacier dust activity, ...
November 21, 2025 at 10:17 PM
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By revisiting old data collected by a probe descending through #Venus' atmosphere in 1978, new insights were gained about its atmosphere (almost 50 years after the data collection).

agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
November 21, 2025 at 9:23 PM
Reposted by Santiago Gassó
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The title says it all.

A very well articulated text from TerraWatch. It reflects and articulates very well what many in the #EarthScience world has been saying for a while.

Glad to see that people outside the science community is noticing.

newsletter.terrawatchspace.com/why-science-...
Why "Science-as-a-Service" Doesn't Work for Earth Science
There has been a lot of talk lately about whether commercial Earth observation (EO) companies could replace parts of NASA’s Earth science mission portfolio. With a new Administrator coming in, that de...
newsletter.terrawatchspace.com
November 20, 2025 at 8:22 PM
🧪🛰️ 🌍

The title says it all.

A very well articulated text from TerraWatch. It reflects and articulates very well what many in the #EarthScience world has been saying for a while.

Glad to see that people outside the science community is noticing.

newsletter.terrawatchspace.com/why-science-...
Why "Science-as-a-Service" Doesn't Work for Earth Science
There has been a lot of talk lately about whether commercial Earth observation (EO) companies could replace parts of NASA’s Earth science mission portfolio. With a new Administrator coming in, that de...
newsletter.terrawatchspace.com
November 20, 2025 at 8:22 PM
I know that guy!
November 18, 2025 at 8:05 PM
it seems like it put a bit too much towards the west (ie central Argentina) compare to the east side (River Plate), this is what satellite suggest.
Interestingly this is the 2nd event this year where I see from satellite dust from Patagonia arriving to this area (in fact the first reached Brazil).
November 18, 2025 at 8:04 PM
in the same sites do show the same evolution and timing. I would to look in more detail everything is quite consistent. There is some cirrus arriving that complicates the detection , some of is removed in Level 1.5 (not shown here).
AOD magnitudes are typical for pollution traveling ~1000km.
November 18, 2025 at 7:52 PM
As forecasted dust from Patagonia arrived to the major metropolis, Buenos Aires and Montevideo. Nice capture by GOES where the dust layer (a bit in contrast but visible).
Arrival times (from satellite) are
La Plata ~ 14:30
Buenos Aires ~ 14:50-15:30
Montevideo 15:30-16:00

The Aeronet stations ..
November 18, 2025 at 7:52 PM
so if Cloudfare has a burp, everyone downstream fills a tsunami, right?
November 18, 2025 at 3:17 PM
oh, this is nice... thx!
November 18, 2025 at 3:14 PM
Today's event seems like a good #GEOScase study as model and observations seem consistent in showing the timing of arrival of dust in Buenos Aires. See Aeronet and GEOS-FP Model forecast, very rough comparison but seems like a good case to look in detail.
How did CAMS do? @mparrington.bsky.social
November 18, 2025 at 2:50 PM
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In addition of the massive dust storm yesterday in Patagonia, the same winds fanned a big forest 🔥in the Andes foothills .

As of this morning , fire was still active and brigades were deployed to contain it. See
www.elpatagonico.com/incendio-el-...
November 18, 2025 at 2:20 PM
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This morning over southern S. America, #highlatitudedust emitted yesterday during the massive wind storm in central Patagonia is well on its way northbound, probably the city of Buenos Aires sometime today.
(see previous posts for more)
November 18, 2025 at 2:13 PM
¿Eso en Sueco-Español or Germano-español? 😀
November 18, 2025 at 2:01 PM
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NASA's Cloudsat 🛰️ was a polar radar sensor (ie once/day overpass).
For precipitation monitoring, a geostationary radar is highly desirable but it doesn't exist yet.
But one could try recreate the radar signal from existing geo sensor as this paper discusses.
link.springer.com/article/10.1...
Geostationary Satellite–Based Proxy Radar Observations: Expanding Coverage for Storm Tracking - Advances in Atmospheric Sciences
Ground-based radar is the primary means by which severe storms are monitored and tracked; however, due to limited coverage, important data is often missed over ocean and mountainous areas. On the othe...
link.springer.com
November 18, 2025 at 1:57 PM
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Higher spatial and temporal resolution reanalysis data reveals that magnitude of small-scale short-lived features has increased at a higher rate than that of larger features

agupubs.onlinelibrary.wiley.com/doi/full/10....
Hourly Precipitation Intensities at 4‐km Resolution Show Statistically Significant Increasing Trends From 1991 to 2022 in the CONUS‐404 Hydroclimate Reanalysis
Trends in precipitation volume, number of wet days, mean wet-day intensity in CONUS-404 are mostly statistically non-significant At the hourly resolution, significant increasing trends are found ...
agupubs.onlinelibrary.wiley.com
November 17, 2025 at 9:42 PM
I appreciate the sincerity of Claude
November 17, 2025 at 8:48 PM
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Inequalities noted in when doing #greenhousegases attribution based on income

pubs.acs.org/doi/10.1021/...
Global Food-Driven Greenhouse Gas Emissions Are Highly Unequal across Income Groups
While food systems drive ∼30% of global annual total greenhouse gas (GHG) emissions, the quantitative relationship between income inequality and food system emissions remains poorly characterized. Our research addresses this gap by quantifying disparities in per-capita food GHG emissions by income tier over three decades (1990–2020). Combining multiregional input–output modeling with life-cycle assessments, we reveal an unprecedented disparity: the top 10% of earners emit 21 times more (10.49 tCO2e yr–1) and the top 1% a staggering 73 times more (36.85 tCO2e yr–1) than the bottom 50% (0.50 tCO2e yr–1). Crucially, we demonstrate that current emission trajectories are incompatible with the 1.5 °C climate target (0.81 tCO2e capita–1 for food systems), necessitating reductions of 86–95% for the top 10% and 38–83% for the middle 40%, while the poorest half already align with this target in many regions. Our novel quantification of this “emissions divide” challenges conventional climate policies focused solely on production-side reforms, instead of spotlighting overconsumption by wealthy individuals as a critical yet overlooked leverage point. This work redefines equitable climate action by establishing that fairness in food-system decarbonization requires targeting high emitters─a transformative insight highlighting the need for differentiated mitigation strategies to simultaneously reduce emissions and ensure global nutrition security within planetary boundaries.
pubs.acs.org
November 17, 2025 at 7:52 PM
Latest MODIS sensor (Terra 🛰️) over Patagonia provides more detail on this ongoing event.

Most of the sources are active in the middle sector.

Farther south there are more active source (not as many ) but are obstructed by clouds.
November 17, 2025 at 5:25 PM
Latest webcam captures in Comodoro Rivadavia show some blue sky suggesting decrease activity but satellite image shows the event is still ongoing but shifting wind direction and taking the dust cloud away from webcams .
November 17, 2025 at 4:11 PM
gusts 72knots!
November 17, 2025 at 4:09 PM
As of mid day, the #highlatitudedust event has low cloudiness and one can appreciate the scale of the event. This is an example of typical "large" Patagonia dust event but for reference the area covered by this event, it is a small fraction of a typical large Saharan dust event.
November 17, 2025 at 4:05 PM
An astonishing storm turned day into night in General Villegas, #Argentina. 🌑

On Saturday (11/15/2025), a massive #storm front plunged the afternoon into darkness within seconds, as dense clouds swept over the city, shocking residents with its intensity.🤯⛈️
November 17, 2025 at 2:49 PM