A wave of Saharan dust is set to hit Britain later this week – which together with drizzle forecast on Friday could result in so-called ‘blood rain’ over parts of the UK.
New satellite imagery from the European Space Agency (ESA) shows a huge plume of Saharan dust making its way across the Atlantic Ocean to the Caribbean.
The plume is also predicted to reach the Lesser Antilles and Puerto Rico on 16 May and 17 May respectively, according to the ESA’s Copernicus Atmosphere Monitoring Service (CAMS), which monitors dust transport from the Sahara Desert every year.
It is also predicted to hit the Iberian Peninsula and western Europe on 20 and 21 May, with some of the plume reaching the southeast UK during the morning of 20 May.
‘Most of the dust transport is likely to be at higher altitudes which could lead to hazy skies rather than impacts on surface air quality,’ Mark Parrington Senior Scientist for CAMS told MailOnline.
‘It may also be mixed with some rain, which is also forecast for Friday, so there could be surface deposits on cars after the rain has cleared.’
The news comes after another huge plume hit western Europe in mid-March, turning skies an eerie shade of orange and covering cars and windows in a layer of fine red dust.
The Saharan dust cloud turned skies over London an eerie shade of orange in March.The next one is expected to reaching the southeast UK during the morning of 20 May
Saharan dust deposited over the front of a Range Rover in March. Vehicles across the UK have been hit with unwelcome the dusty deposits
CAMS scientists said this year has shown – and continues to show – higher than normal levels of dust transported across the Mediterranean and parts of Europe.
‘The source of the dust in the atmosphere is dependent on the wind patterns over the Sahara and this has been driving the sources of the events we have been monitoring this year,’ said Parrington.
‘Typically, the most active season is spring, but the conditions have been favourable for Saharan dust transport since the beginning of the year.’
Dust plumes occur when strong winds whip up sand and other organic sediment from the deserts and send it into the troposphere – the lowest portion of the Earth’s atmosphere.
This can then be transported towards the Caribbean following trade winds in the spring, summer and early autumn, when the Saharan Air Layer forms crossing the Atlantic with very dry, dusty air masses.
Early spring is the most active period for Saharan dust transport into Europe.
Dust clouds at surface levels bring particulate matter, worsening air quality and posing respiratory or even cardiovascular risks.
As dust transport in this case is likely to be at higher altitudes, it is unlikely to have a significant impact on air quality at the surface, according to Parrington.
However, CAMS identified ‘very high values of aerosol’, which can reduce the amount of sunlight reaching the ground.
It could also results in ‘blood rain’, which occurs when relatively high concentrations of red coloured dust or particles get mixed into rain, giving it a red appearance as it falls.
Parts of the UK were hit by a Saharan red dust cloud in back in March, with cars across the south pictured covered in fine red dust.
The cloud had travelled up from Europe, with skies turning orange in parts France and Spain.
Saharan dust can transport microorganisms, including pathogens – although there is no evidence of human infectious diseases caused by pathogens dispersed on long-distance dust transports.
However, it can cause diseases on the Caribbean coral reefs.
CAMS global particulate matter analysis on Tuesday 3 May 2022 showing intense activity across the Dust Belt
The Sahara isn’t the only source of dust clouds – the so-called dust belt goes from the Chinese and Mongolian Gobi Desert to the Mauritanian coast.
Northern Africa is the main global source, counting for around 50 per cent of the dust emissions followed closely by Asia with a 40 per cent, especially coming from the Middle East and Central Asia according to a recent survey.
Only today, a sandstorm descended on Iraq, sending at least 2,000 people to hospital with breathing problems and leading to the closure of airports, schools and public offices across the country.
It is the eighth duststorm since mid-April to hit Iraq, which has been battered by soil degradation, intense droughts and low rainfall linked to climate change.
The last one earlier this month led to the death of one person while 5,000 others had to be hospitalised for respiratory problems.
On Monday a thick cloud of dust enveloped the capital Baghdad in an orange glow and blanketed many other cities including the Shiite shrine city of Najaf to the south, and Sulaimaniyah, in the northern Kurdish autonomous region, AFP correspondents said.
Yellow and orange sand covered building roofs, cars and even crept into homes.
Asandstorm descended on Iraq today , sending at least 2,000 people to hospital with breathing problems and leading to the closure of airports, schools and public offices across the country. Pictured: a man pushes a cart during a sandstorm in Baghdad, Iraq
It is the eighth duststorm since mid-April to hit Iraq, which has been battered by soil degradation, intense droughts and low rainfall linked to climate change. Pictured: People walk on a street during a sandstorm in Baghdad
Authorities in seven of Iraq’s 18 provinces, including Baghdad, ordered government offices to shut.
But health facilities remained open to assist those most at risk, including the elderly and people suffering from chronic respiratory diseases and heart ailments.
By midday at least 2,000 people were admitted to hospitals across Iraq in need of oxygen, said health ministry spokesman Seif al-Badr.
‘The dust transport event from the Sahara is not directly affecting the current sandstorm in Iraq, which has a more local source.
‘The air quality impacts in that case are much more severe as the sand is staying close to the surface and directly impacting on large population centres.’
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