Discover and read the best of Twitter Threads about #SaharanDust

Most recents (17)

[Thread] Un nuage de poussière de #Sable #sabledusahara EXCEPTIONNEL nous traverse pendant 48h. Il masque le sol sur les images satellites ! De mémoire, je n'ai jamais vu un nuage aussi large et dense sur la 🇫🇷.
La suite des images satellites dans 1 heure.
#Tempete #SaharanDust
Un épisode similaire avait eu lieu le 6 février 2021 avait une magnitude moindre.
#Sable #sabledusahara #Tempete #SaharanDust
De belles images également le 26 février 2000 et 24 février 2020 au large de l'Afrique !
#Sable #sabledusahara #Tempete #SaharanDust
Read 4 tweets
[Thread] Le ciel est jaune sur la France #cieljaune, ce qui affole la twittosphère. Il s'agit d'une nuage de poussière de sable en provenance du #Sahara #SaharanDust .
Est-ce normal ? Comment est-il arrivé jusque sur l'Europe ?

Photo @infoclimat :… Image
[Comment ?] Une dépression (lignes blanches) se situe sur l'Espagne : le vent (flèche noire) est de sud à l'avant de celle-ci de l'Afrique jusqu'à la France. Il se charge de particules de sable et fait remonter de la douceur (couleur orangée) jusqu'à la France. Image
[Pourquoi ?] Ce sont des particules bien + petites que la sable de plage, propulsées dans la haute atmosphère grâce à des vents verticaux. (même phénomène pour les feux de forêts). Reprises par les vents d'altitude, elles parcours ainsi des milliers de kilomètres en altitude. Image
Read 6 tweets
Meanwhile in #France,
"the peak of this second wave is over"

(according to the President in his Adress to the Nation):
Wait... "the peak is over" doesn´t mean "it´s back to normal"!

Confinement will only fall on December 15,
if there´s less than 5.000 new cases a day.
(today it´s ~9.000).

France is disappointed.🙁

Although they certainly can make it happen.
Meanwhile in #Switzerland:
(excess mortality of the second wave is significant)

Good news: fastest decrease in infections happens in the worst hit areas now.
Read 2817 tweets
High values of aerosol optical depth corresponding to #CaliforniaFires #OregonFires smoke crossing the North Atlantic to the Norwegian Sea & Scandinavia in the #CopernicusAtmosphere Monitoring Service forecast initialized at 00 UTC on 19/09… Image
Looking ahead to 18 UTC on 20/09 shows smoke aerosol from western US #wildfires crossing northern Scotland & could lead to a spectacular sunset. S UK/N France may also see hazy skies with #SaharanDust @liamdutton @Schafernaker @LucyWeather @Lauratobin1… Image
Read 3 tweets
Thick smoke from continuing #CaliforniaFires #OregonFires crossing N America & eventually N Atlantic towards Iceland🇮🇸 & Norwegian Sea in latest @CopernicusECMWF Atmosphere Monitoring Service @ECMWF forecast visualized by @windyforecast…
Note also sea salt aerosol from #HurricanePaulette, #SaharanDust and smoke from #wildfires in Portugal & Spain #IIFF
Latest monitoring data of daily total intensity & estimated annual total carbon emissions for western US #wildfires with #CopernicusAtmosphere GFAS #opendata…. #CaliforniaFires #OregonFires & #WashingtonFires continue >> 2003-2019 mean #wildfires2020 #IIFF ImageImage
Read 6 tweets
Initial evaluation of #CopernicusAtmosphere Monitoring Service aerosol forecasts with independent NASA Aeronet observations at Ragged Point Barbados🇧🇧 shows good agreement since 1 July… #SaharanDust Image
Evaluation on the other side of the Atlantic Ocean, with Aeronet obs from Izaña on Tenerife🇪🇸, also looks good & captures high values of #SaharanDust aerosol optical depth in early July @AEMET_Izana @ECuevasAgullo @IamSilviaAlonso Image
Read 3 tweets
Arrival of latest #SaharanDust for Caribbean, Central America & Mexico for next few days in CopernicusAtmosphere Monitoring Service aerosol optical depth forecast visualized by @windyforecast… @CopernicusECMWF @ECMWF @CopernicusEU
Forecast charts of dust aerosol optical depth… & surface PM10 concentration… valid for 00UTC on 14 July shows extent of plume from N coast Venezuela to Cuba & potential #airquality impacts. ImageImage
Read 3 tweets
As #COVID19 cases are found to spread, #Melbourne (city of ~5 million) tries to contain them by going into #Lockdown.
(The interview features the idea of a dedicated #Quarantine building - that would actually help, I guess)...
"People acting as if the pandemic was over was 'not the answer, it is part of the problem' ".

"The virus had leaked from postcodes already under the stay-at-home orders to other parts of #Melbourne."
(and beyond, it is feared).
Due to #Melbourne's outbreak, neighbouring South Australia is about to completely close it's borders to #Victoria.

(Nearly) no exceptions. And those essential few who are allowed in, will have to wear facemasks the entire time...
Read 2915 tweets
1/5 Interesting #dust blob off Florida coast. Where will the #SaharanDust that crossed the US go next? Will it make it to Europe? On 27 June #dust extends from Cuba to North Carolina, still up to nearly 5km altitude.
2/5 28 June, #SaharanDust spreads westwards over Atlantic, upper boundary still 4-5km on leading edge
3/5 29 June, #dust patchy over Atlantic but still present. (No #calipso images in yet). OMPS AI left, MODIS Terra AOD right.
Read 6 tweets
Three Animations for today:

1: Rainfall over India during the first five months of 2020
2: Possible water stagnant areas near Dibrugarh, Assam (#AssamFloods) observed by Sentinel 1 @sentinel_hub
3: #SaharanDust Transfer between Africa and Americas over the last two weeks observed by MODIS (Aerosol Optical Depth product) Dark red areas flowing from the right to left denote the dust!
Read 3 tweets
High dust AOD & surface PM10 in #Copernicus Atmosphere Monitoring Service forecast for 12UTC on 22 June, + initial evaluation vs Aeronet at Ragged Point🇧🇧, Guadeloupe🇫🇷, Cape San Juan & La Parguera🇵🇷as #SaharanDust plume crosses Caribbean & Gulf of Mexico ImageImageImage
Initial evaluation of aerosol profiles vs CALIPSO along orbit track crossing the plume on 21 June also shows good general agreement with plume altitude & distribution. VIIRS visible satellite imagery from ImageImage
Read 3 tweets
The Saharan dust Storms comes from the Sahel strip. Not from the Sahara desert itself #SaharanDust #polvodelSahara #duststorm
The Sahel strip is south of the Sahara. These are lands that are being desertified (turning into desert) for different reasons. Climate change, civil wars, migrations, exploitation of resources, deforestation and burning of slash to enable areas for livestock.
Where at this time of year arrives and the wind begins to lift all that particulate, takes it to the atmosphere and reaches in several days (5 to 6 days) to the Caribbean areas.
Read 7 tweets
Vorpommern-Greifswald district (where rejections of #Gütersloh residents took place, yesterday)
has specific rules:
"Those who return from international risk areas (out of Germany) or whose Corona-Warning App has alerted them, need to report to authorites" Image
In fact, Mecklenburg-Vorpommern's Corona-ordinance really prohibits entry of people from international risk areas AND german risk areas as well.
It's just not prominently featured on their websites.

(Overlooked that myself, hence deleted earlier tweet)… Image
People from #Gütersloh district may have to scrap all their holiday plans anyway...

An official #Lockdown is just being announced for the entire district.
(for one week, as of now)
Read 2556 tweets
High surface PM10 #AirPollution from #SaharanDust over SE Europe & E Mediterranean in #Copernicus Atmosphere Monitoring Service regional ensemble forecast for 20 May PM10 > 24-h threshold for Athens🇬🇷Limassol🇨🇾 for next 1-2 days. #AirQuality ImageImageImage
Time series for Athens & Nicosia, from #Copernicus Atmopshere Monitoring Service COVID-19 microsite…, help show increase in surface PM10 since 8 May relative to previous weeks & 2017-2019 range #AirQuality #AirPollution #SaharanDust ImageImage
Read 3 tweets

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