Discover and read the best of Twitter Threads about #SaharanDust
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[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
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
#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
#Sable #sabledusahara #Tempete #SaharanDust
[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 :
infoclimat.fr/photolive-phot…
Est-ce normal ? Comment est-il arrivé jusque sur l'Europe ?
Photo @infoclimat :
infoclimat.fr/photolive-phot…
[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.
[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.
Meanwhile in #France,
"the peak of this second wave is over"
(according to the President in his Adress to the Nation):
"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.
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.
(excess mortality of the second wave is significant)
Good news: fastest decrease in infections happens in the worst hit areas now.
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 atmosphere.copernicus.eu/charts/cams/ae…
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 atmosphere.copernicus.eu/charts/cams/ae…
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 windy.com/-Aerosol-aod55…
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 confluence.ecmwf.int/display/CKB/CA…. #CaliforniaFires #OregonFires & #WashingtonFires continue >> 2003-2019 mean #wildfires2020 #IIFF
More hazy skies predicted for W & N Europe with #SaharanDust over next few days in @CopernicusECMWF Atmosphere Monitoring Service @ECMWF aerosol optical depth forecast from 13 Sept atmosphere.copernicus.eu/charts/cams/ae… & more #CaliforniaFires #OregonFires smoke next weekend
Note also high (sea salt) aerosol optical depth associated with #HurricanePaulette
A lot of aerosol over the Atlantic with smoke from #CaliforniaWildfires #ColoradoFires & #SaharanDust in the north, smoke from S tropical Africa/South America fires in the south. Latest @CopernicusECMWF Atmosphere Monitoring Service @ECMWF forecast visualized by @windyforecast
Explore more at windy.com/-Aerosol-aod550
Busy days over the North Atlantic with smoke from #CaliforniaFires #ColoradoFires & #SaharanDust moving around Azores high in @CopernicusECMWF Atmosphere Monitoring Service @ECMWF aerosol optical depth forecast visualized by @windyforecast windy.com/-Aerosol-aod55… @CopernicusEU
Initial evaluation of #CopernicusAtmosphere Monitoring Service aerosol forecasts with independent NASA Aeronet observations aeronet.gsfc.nasa.gov at Ragged Point Barbados🇧🇧 shows good agreement since 1 July atmosphere.copernicus.eu/charts/cams_ae… #SaharanDust
cc @SanGasso @DustyCRyder @DustStormNews @DrAeolus @SaraBasart @cp_garcia_pando @Dust_Barcelona @eoliandust @adamonzon @JeanSuriel @Rafacereceda @TTWeatherCenter @hidromet @DeborahTiempo @AntjeInness @Mel_Ades @RichardJEngelen @VHPeuch @aire_sergio_rod @henk_eskes @AerosolWatch
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 atmosphere.copernicus.eu/charts/cams_ae… @AEMET_Esp @AEMET_Izana @ECuevasAgullo @IamSilviaAlonso
Arrival of latest #SaharanDust for Caribbean, Central America & Mexico for next few days in CopernicusAtmosphere Monitoring Service aerosol optical depth forecast visualized by @windyforecast windy.com/-Aerosol-aod55… @CopernicusECMWF @ECMWF @CopernicusEU
Forecast charts of dust aerosol optical depth atmosphere.copernicus.eu/charts/cams/ae… & surface PM10 concentration atmosphere.copernicus.eu/charts/cams/pa… valid for 00UTC on 14 July shows extent of plume from N coast Venezuela to Cuba & potential #airquality impacts.
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)...
(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).
"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...
(Nearly) no exceptions. And those essential few who are allowed in, will have to wear facemasks the entire time...
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
Three Animations for today:
1: Rainfall over India during the first five months of 2020
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!
#Sahara
#Sahara
High dust AOD & surface PM10 in #Copernicus Atmosphere Monitoring Service forecast for 12UTC on 22 June atmosphere.copernicus.eu/charts/cams/, + initial evaluation vs Aeronet at Ragged Point🇧🇧, Guadeloupe🇫🇷, Cape San Juan & La Parguera🇵🇷as #SaharanDust plume crosses Caribbean & Gulf of Mexico
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 go.nasa.gov/2B78EJx
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.
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"
kreis-vg.de
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"
kreis-vg.de
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)
landesrecht-mv.de/jportal/portal…
It's just not prominently featured on their websites.
(Overlooked that myself, hence deleted earlier tweet)
landesrecht-mv.de/jportal/portal…
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)
An official #Lockdown is just being announced for the entire district.
(for one week, as of now)
High surface PM10 #AirPollution from #SaharanDust over SE Europe & E Mediterranean in #Copernicus Atmosphere Monitoring Service regional ensemble forecast for 20 May macc-raq-op.meteo.fr/index.php. PM10 > 24-h threshold for Athens🇬🇷Limassol🇨🇾 for next 1-2 days. #AirQuality
cc @VHPeuch @RichardJEngelen @henk_eskes @SaraBasart @AntjeInness @DustyCRyder @DustStormNews @DrMariLizaK @climate_cyprus @windyforecast @Rafacereceda
Time series for Athens & Nicosia, from #Copernicus Atmopshere Monitoring Service COVID-19 microsite atmosphere.copernicus.eu/european-air-q…, help show increase in surface PM10 since 8 May relative to previous weeks & 2017-2019 range #AirQuality #AirPollution #SaharanDust
