Dust from the Sahara is being blown onto the Himalayas and is speeding up snow ...

Dust from some of the world's largest deserts is contributing to the rapid melt of the Himalayan snow caps, scientists have found. 

The particles reach the peaks after travelling thousands of miles from the Indian Thar Desert, the plains of Saudi Arabia and the Sahara Desert. 

After being carried around the world on vast air currents, the particles settle on the Asian mountain range and darken the otherwise pristine snow.  

This dampens the phenomenon known as the 'albedo effect' where light-coloured surfaces reflect more heat, helping keep areas cool. 

As a result of the dust, the darker snow is absorbing more heat and therefore melting quicker. It is thought this could explain the rapidly melting snow in the Himalayas.    

Dust is reaching the snow capped mountains of the Himalayas (pictured) and speeding up melting, NASA funded research reveals

Dust is reaching the snow capped mountains of the Himalayas (pictured) and speeding up melting, NASA funded research reveals  

A NASA-funded international team of researchers scoured some of the most detailed satellite images ever taken of the Himalayas and recorded levels of minute atmospheric aerosol particles, elevation and the amount of dust present on snow.

It revealed the amount of dust being blown onto the snow caps was interfering with the albedo effect. 

This is a simple physical phenomenon where dark objects absorb more wavelengths of light than light coloured objects. 

Light colours, and specifically white, bounces most of the energy from the Sun back into space, keeping temperatures cool. 

But the dark dust particles do the opposite and soak up more thermal energy and reflect less, causing warming.  

Desert dust is naturally occurring but its prevalence in the Himalayas has been influenced by human activities, the researchers believe. 

For example, increasing temperatures caused by climate change have altered atmospheric circulation, enhancing winds that carry dust thousands of miles on 'aerosol layers'.

Intensive farming and increasing development have also reduced vegetation, causing more dust to be created that would otherwise remain trapped to the land.   

The increased presence of dust atop mountains is a leading contributor to the unprecedented rate of snow loss in the Himalayas, the researchers say. 

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