Estimates vary, but conventional wisdom indicates it is not a huge effect now (still there are many details to be worked out though). But it looks it was more impactful during ice-ages.
🧪🌍💨🌊
Aerosol deposition underestimated over the global ocean
www.nature.com/articles/s41...
@solas-ipo.bsky.social @usocb.bsky.social
Aerosol deposition underestimated over the global ocean
www.nature.com/articles/s41...
@solas-ipo.bsky.social @usocb.bsky.social
Client Challenge
www.nature.com
Enjoying a classic book, very good for refreshing concepts and learning on #chiral materials (and symmetry in our world ) and those who studied it.
Really good background info of u r interested in optical #polarization .
#physics @drskyskull.bsky.social
Really good background info of u r interested in optical #polarization .
#physics @drskyskull.bsky.social
🛰️🌎🌬️
This morning in central Patagonia, #highlatitudedust activity.
This morning in central Patagonia, #highlatitudedust activity.
Reposted by Santiago Gassó, Rosemary A. Joyce, Dawn J. Wright
ICYMI, here is the press release for my study with @drjuliawester.bsky.social - we surveyed over 800 scientists who use social media. They overwhelmingly agree that Twitter is no longer useful or pleasant, and that for all professional online scientist goals, Bluesky is superior.
🧪 #SciComm 🌍
🧪 #SciComm 🌍
“Twitter sucks now and all the cool kids are moving to Bluesky:” Our new survey shows that scientists no longer find Twitter professionally useful or pleasant
My colleague Dr. Julia Wester and I have a new paper out in the journal Integrative and Comparative Biology reporting on the results of a survey distributed to over 800 scientists, science educator…
www.southernfriedscience.com
🛰️🌍🔥
Yesterday in Central Argentina, #dust and #smoke mixed because coincident & different air masses. Winds from the W went over the Andes and fanned fires in the Cordoba province hills. Smoke remain relatively high. Same time a lower cold front from the south lifted dust plumes (brownish).
Yesterday in Central Argentina, #dust and #smoke mixed because coincident & different air masses. Winds from the W went over the Andes and fanned fires in the Cordoba province hills. Smoke remain relatively high. Same time a lower cold front from the south lifted dust plumes (brownish).
Reposted by Santiago Gassó
What is causing poor #AirQuality in #Milan ?😷
(1/2)🧵
Milan’s poor air quality stems from its spot in Italy’s Po Valley, wedged between the Alps & Apennines. The fertile plains host dense industry & farms, producing 35% of Italy’s crops plus bricks & tiles — but also major emissions.🚜🏭🔥 #MilanSmog
(1/2)🧵
Milan’s poor air quality stems from its spot in Italy’s Po Valley, wedged between the Alps & Apennines. The fertile plains host dense industry & farms, producing 35% of Italy’s crops plus bricks & tiles — but also major emissions.🚜🏭🔥 #MilanSmog
🛰️🌬️🌍
By sunset over Patagonia today, copious amount of #highlatitudedust was being injected in the southern Atlantic region.
By sunset over Patagonia today, copious amount of #highlatitudedust was being injected in the southern Atlantic region.
🛰️🌍🌬️
This morning #highlatitudedust in central Patagonia, copious amounts are reaching the city of Comodoro Rivadavia , where webcams show significant visibility decrease.
This morning #highlatitudedust in central Patagonia, copious amounts are reaching the city of Comodoro Rivadavia , where webcams show significant visibility decrease.
So a lot of work is done by satellite teams (like the ones at NASA and NOAA) to reconcile and understand these differences and make sure that different satellites are consistent in reporting properties from the same geophysical phenomenon.
6/6
6/6
Here are the same from DT algorithm from NOAA20 sensor (native pixel 750m, aggregated at 6x6km).
In this case, there are much fewer retrievals, because each pixel is a bit too big and it captures the plume & clear sky nearby resulting in smaller observed reflectance. This results in lower AOD 5/n
In this case, there are much fewer retrievals, because each pixel is a bit too big and it captures the plume & clear sky nearby resulting in smaller observed reflectance. This results in lower AOD 5/n
Here are the AODs derived from the DT algorithm from TERRA sensor native spatial res is 500m and product reported a 3km. (only high values are shown)
Each individual plume is well resolved and there is a clear sharp contrast in AOD between center of plume and outside.
4/n
Each individual plume is well resolved and there is a clear sharp contrast in AOD between center of plume and outside.
4/n
The issue is that frequently there is variability of the derived AOD between sensors because calibration and spatial resolution differences.
so let's look at this example in more detail... 3/n
so let's look at this example in more detail... 3/n
From the observed reflectance in the image, the operational sensors provide the aerosol optical depth (AOD) and from it , particle matter (the actual parameter of interest for AQ applications) is indirectly derived. How much is present informs decision makers on whether e.g issue AQ alerts. 2/n
🧪🛰️🌍
Streaks of #highlatitudedust emitted in southern #Iceland.
This example illustrates an important fact about using polar sensors to detect pollution (dust in this case) and sensor spatial resolution.
1/n
Streaks of #highlatitudedust emitted in southern #Iceland.
This example illustrates an important fact about using polar sensors to detect pollution (dust in this case) and sensor spatial resolution.
1/n
🛰️🏭
A lot of pollution this morning in northern #Italia.
Satellite detected optical depths (a proxy for particulate concentration) from the MODIS sensor indicates high values, consistent with very high PM presence.
A lot of pollution this morning in northern #Italia.
Satellite detected optical depths (a proxy for particulate concentration) from the MODIS sensor indicates high values, consistent with very high PM presence.
Reposted by Santiago Gassó
📢 Open Position Alert!
GEOMAR is hiring a Scientist/Postdoc (18 months, full time) to support the operation & expansion of the MEMENTO database within the EU project BioGeoSea 🌊🔬
🗓️ Apply by 19 Oct 2025
🔗 www.geomar.de/en/karriere/...
#JobAlert #OceanScience #Research #GEOMAR #BioGeoSea
GEOMAR is hiring a Scientist/Postdoc (18 months, full time) to support the operation & expansion of the MEMENTO database within the EU project BioGeoSea 🌊🔬
🗓️ Apply by 19 Oct 2025
🔗 www.geomar.de/en/karriere/...
#JobAlert #OceanScience #Research #GEOMAR #BioGeoSea
Scientist (m/f/d) for the operation and expansion of the MEMENTO database
www.geomar.de
🛰️🌍
A #volcanotrack in Bristol island in the S. Atlantic. It is rare to see activity in this 🌋. Frankly I do not recall ever seeing it active (I have been making obs in this area +15yrs). It appears that activity lasted about 2 days.
Emissions remain low in altitude & wrap up w/orographic wave.
A #volcanotrack in Bristol island in the S. Atlantic. It is rare to see activity in this 🌋. Frankly I do not recall ever seeing it active (I have been making obs in this area +15yrs). It appears that activity lasted about 2 days.
Emissions remain low in altitude & wrap up w/orographic wave.
Oh, good catch,
I was not aware of the presence of such aerosol type in será where my default has been mostly dust and sometimes mixed with dust.
I was not aware of the presence of such aerosol type in será where my default has been mostly dust and sometimes mixed with dust.
🛰️🌍🌊💨🧊
More #highlatitudedust yesterday this time in the northern hemisphere, in Greenland.
This MODIS Terra image does not clearly show source, probably because dust emission ended before the satellite overpass . GOES image shows that it was active during sunrise and before Terra overpass.
More #highlatitudedust yesterday this time in the northern hemisphere, in Greenland.
This MODIS Terra image does not clearly show source, probably because dust emission ended before the satellite overpass . GOES image shows that it was active during sunrise and before Terra overpass.
🧊🛰️
glacier in motion as seen from space , 9 year animation.
glacier in motion as seen from space , 9 year animation.
Reposted by Santiago Gassó, Peter Thorne
Reposted by Santiago Gassó
It's official: AOL's dial-up internet has taken its last bow.
AOL's dial up internet takes its last bow, marking the end of an era
It’s official: AOL’s dial-up internet has taken its last bow. The company confirmed it would discontinue the service on Tuesday, September 30th, citing routine evaluations of its offerings.
bit.ly
🧪🛰️🌍🌊🧊
Another all day cloudy in Patagonia, where lake Coluhe Huapi (next to Sarmiento in image) was active all day. This time there is no satellite view to confirm but at least there are some surface webcams that can confirm. Note there is more #highlatitudedust in suspension than yesterday.
Another all day cloudy in Patagonia, where lake Coluhe Huapi (next to Sarmiento in image) was active all day. This time there is no satellite view to confirm but at least there are some surface webcams that can confirm. Note there is more #highlatitudedust in suspension than yesterday.
