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
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.
AOD magnitudes are typical for pollution traveling ~1000km.
November 18, 2025 at 7:52 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.
AOD magnitudes are typical for pollution traveling ~1000km.
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 ..
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
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 ..
Arrival times (from satellite) are
La Plata ~ 14:30
Buenos Aires ~ 14:50-15:30
Montevideo 15:30-16:00
The Aeronet stations ..
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
How did CAMS do? @mparrington.bsky.social
November 18, 2025 at 2:50 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
How did CAMS do? @mparrington.bsky.social
🛰️
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-...
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
🛰️
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-...
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-...
🧪🛰️🌍💨
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)
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
🧪🛰️🌍💨
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)
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)
I appreciate the sincerity of Claude
November 17, 2025 at 8:48 PM
I appreciate the sincerity of Claude
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.
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 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.
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.
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
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 .
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
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.
NASA's GEOS model did predict this event , with considerable spread in the SW Atlantic and beyond. The prediction places a considerably sized dust cloud in southern Brazil after 72hrs (probably too thin to be detected, my bet)
@mparrington.bsky.social
@mparrington.bsky.social
November 17, 2025 at 2:43 PM
NASA's GEOS model did predict this event , with considerable spread in the SW Atlantic and beyond. The prediction places a considerably sized dust cloud in southern Brazil after 72hrs (probably too thin to be detected, my bet)
@mparrington.bsky.social
@mparrington.bsky.social
Webcams in the town of Comodoro Rivadavia illustrate that this is a major event with significant visibility degradation .
November 17, 2025 at 2:36 PM
Webcams in the town of Comodoro Rivadavia illustrate that this is a major event with significant visibility degradation .
🛰️🌍💨
Very windy this morning over all Patagonia, with #highlatitudedust activity spanning +900km. Let's see how this evolves through the day.
@aerosolwatch.bsky.social @mparrington.bsky.social @sheffielddust.bsky.social
Very windy this morning over all Patagonia, with #highlatitudedust activity spanning +900km. Let's see how this evolves through the day.
@aerosolwatch.bsky.social @mparrington.bsky.social @sheffielddust.bsky.social
November 17, 2025 at 2:28 PM
🛰️🌍💨
Very windy this morning over all Patagonia, with #highlatitudedust activity spanning +900km. Let's see how this evolves through the day.
@aerosolwatch.bsky.social @mparrington.bsky.social @sheffielddust.bsky.social
Very windy this morning over all Patagonia, with #highlatitudedust activity spanning +900km. Let's see how this evolves through the day.
@aerosolwatch.bsky.social @mparrington.bsky.social @sheffielddust.bsky.social
🛰️🌍🌊💨
#highlatitudedust activity in Patagonia (Nov/15). Mostly cloudy day but #dust is visible in clear sky patches.
Standard satellite products instantaneous snapshots (like VIIRS) or aggregated products (like GOES) fail also to capture the full extent dust cloud.
#highlatitudedust activity in Patagonia (Nov/15). Mostly cloudy day but #dust is visible in clear sky patches.
Standard satellite products instantaneous snapshots (like VIIRS) or aggregated products (like GOES) fail also to capture the full extent dust cloud.
November 17, 2025 at 2:25 PM
🛰️🌍🌊💨
#highlatitudedust activity in Patagonia (Nov/15). Mostly cloudy day but #dust is visible in clear sky patches.
Standard satellite products instantaneous snapshots (like VIIRS) or aggregated products (like GOES) fail also to capture the full extent dust cloud.
#highlatitudedust activity in Patagonia (Nov/15). Mostly cloudy day but #dust is visible in clear sky patches.
Standard satellite products instantaneous snapshots (like VIIRS) or aggregated products (like GOES) fail also to capture the full extent dust cloud.
🛰️🌍🌬️
Cloudy and windy in Central Patagonia today. But under those clouds there is a lot of dust emitted by dry lake Colhué Huapi (right next to Sarmiento).
Webcam in Comodoro Rivadavia confirms.
#highlatitudedust
Cloudy and windy in Central Patagonia today. But under those clouds there is a lot of dust emitted by dry lake Colhué Huapi (right next to Sarmiento).
Webcam in Comodoro Rivadavia confirms.
#highlatitudedust
November 14, 2025 at 7:07 PM
🛰️🌍🌬️
Cloudy and windy in Central Patagonia today. But under those clouds there is a lot of dust emitted by dry lake Colhué Huapi (right next to Sarmiento).
Webcam in Comodoro Rivadavia confirms.
#highlatitudedust
Cloudy and windy in Central Patagonia today. But under those clouds there is a lot of dust emitted by dry lake Colhué Huapi (right next to Sarmiento).
Webcam in Comodoro Rivadavia confirms.
#highlatitudedust
🛰️🌍🌬️
#highlatitudedust activity in Iceland yesterday as seen by MODIS(Terra) and Sentinel 2
#highlatitudedust activity in Iceland yesterday as seen by MODIS(Terra) and Sentinel 2
November 14, 2025 at 7:01 PM
🛰️🌍🌬️
#highlatitudedust activity in Iceland yesterday as seen by MODIS(Terra) and Sentinel 2
#highlatitudedust activity in Iceland yesterday as seen by MODIS(Terra) and Sentinel 2
November 12, 2025 at 9:25 PM
if the plume slowly ascends towards cloud deck, it reaches cloud base farther downwind when droplets in contact with volcanic emissions become smaller (and thus brighter).
I am inclined it is latter reason but I can't confirm without looking at other parameters that I do not have readily handy. 3/3
I am inclined it is latter reason but I can't confirm without looking at other parameters that I do not have readily handy. 3/3
November 12, 2025 at 7:28 PM
if the plume slowly ascends towards cloud deck, it reaches cloud base farther downwind when droplets in contact with volcanic emissions become smaller (and thus brighter).
I am inclined it is latter reason but I can't confirm without looking at other parameters that I do not have readily handy. 3/3
I am inclined it is latter reason but I can't confirm without looking at other parameters that I do not have readily handy. 3/3
Near IR RGB provides more information (more sensitive to droplet size in this channel). In this case, note the brighter end of the plume.
If the plume is injected at cloud deck, then it is possible that droplets become smaller (resulting in more scattering ie. brighter) as they travel away. 2/n
If the plume is injected at cloud deck, then it is possible that droplets become smaller (resulting in more scattering ie. brighter) as they travel away. 2/n
November 12, 2025 at 7:28 PM
Near IR RGB provides more information (more sensitive to droplet size in this channel). In this case, note the brighter end of the plume.
If the plume is injected at cloud deck, then it is possible that droplets become smaller (resulting in more scattering ie. brighter) as they travel away. 2/n
If the plume is injected at cloud deck, then it is possible that droplets become smaller (resulting in more scattering ie. brighter) as they travel away. 2/n
🛰️
Activity in Mt Michael 🌋 in the S. Atlantic
#Sentinel2 visible image suggests a plume or #volcanotrack, it is not really clear the location of the plume, above below or above cloud deck or even at same height as cloud deck . 1/n
Activity in Mt Michael 🌋 in the S. Atlantic
#Sentinel2 visible image suggests a plume or #volcanotrack, it is not really clear the location of the plume, above below or above cloud deck or even at same height as cloud deck . 1/n
November 12, 2025 at 7:28 PM
🛰️
Activity in Mt Michael 🌋 in the S. Atlantic
#Sentinel2 visible image suggests a plume or #volcanotrack, it is not really clear the location of the plume, above below or above cloud deck or even at same height as cloud deck . 1/n
Activity in Mt Michael 🌋 in the S. Atlantic
#Sentinel2 visible image suggests a plume or #volcanotrack, it is not really clear the location of the plume, above below or above cloud deck or even at same height as cloud deck . 1/n
💨🌍🛰️
This morning , very windy in southern Patagonia and #highlatitudedust plumes are developing. Ongoing event.
@sheffielddust.bsky.social
This morning , very windy in southern Patagonia and #highlatitudedust plumes are developing. Ongoing event.
@sheffielddust.bsky.social
November 12, 2025 at 2:34 PM
💨🌍🛰️
This morning , very windy in southern Patagonia and #highlatitudedust plumes are developing. Ongoing event.
@sheffielddust.bsky.social
This morning , very windy in southern Patagonia and #highlatitudedust plumes are developing. Ongoing event.
@sheffielddust.bsky.social
🛰️
In Argentina's breadbasket, abundant rains have put a pause in area stressed by a couple of years of low precip.
In fact rain last few months has been too much and now inundated pastures and damaged crops are the issue.
Satellite images showing inundated areas and comparison with 2 years ago.
In Argentina's breadbasket, abundant rains have put a pause in area stressed by a couple of years of low precip.
In fact rain last few months has been too much and now inundated pastures and damaged crops are the issue.
Satellite images showing inundated areas and comparison with 2 years ago.
November 12, 2025 at 1:15 PM
🛰️
In Argentina's breadbasket, abundant rains have put a pause in area stressed by a couple of years of low precip.
In fact rain last few months has been too much and now inundated pastures and damaged crops are the issue.
Satellite images showing inundated areas and comparison with 2 years ago.
In Argentina's breadbasket, abundant rains have put a pause in area stressed by a couple of years of low precip.
In fact rain last few months has been too much and now inundated pastures and damaged crops are the issue.
Satellite images showing inundated areas and comparison with 2 years ago.
🛰️🌍
The sky lighted up yesterday in both ends of the planet...
and of course, it happened after I went to bed.
The sky lighted up yesterday in both ends of the planet...
and of course, it happened after I went to bed.
November 12, 2025 at 1:01 PM
🛰️🌍
The sky lighted up yesterday in both ends of the planet...
and of course, it happened after I went to bed.
The sky lighted up yesterday in both ends of the planet...
and of course, it happened after I went to bed.
🛰️🌍🌬️
some minor #highlatitudust activity in Copper River Valley in Alaska today. Seen in webcam but it is not thick enough vertically to show in satellite image.
some minor #highlatitudust activity in Copper River Valley in Alaska today. Seen in webcam but it is not thick enough vertically to show in satellite image.
November 12, 2025 at 1:00 AM
🛰️🌍🌬️
some minor #highlatitudust activity in Copper River Valley in Alaska today. Seen in webcam but it is not thick enough vertically to show in satellite image.
some minor #highlatitudust activity in Copper River Valley in Alaska today. Seen in webcam but it is not thick enough vertically to show in satellite image.
In fact the same spot was producing dust yesterday too.
November 6, 2025 at 10:02 PM
In fact the same spot was producing dust yesterday too.
🛰️🌍💨
#highlatitudedust activity this morning in the Valley of Ten Thousand Smokes (AK) visible from space (early overpass Terra) and the FAA webcam.
#highlatitudedust activity this morning in the Valley of Ten Thousand Smokes (AK) visible from space (early overpass Terra) and the FAA webcam.
November 6, 2025 at 10:00 PM
🛰️🌍💨
#highlatitudedust activity this morning in the Valley of Ten Thousand Smokes (AK) visible from space (early overpass Terra) and the FAA webcam.
#highlatitudedust activity this morning in the Valley of Ten Thousand Smokes (AK) visible from space (early overpass Terra) and the FAA webcam.