French scientists call for samples of Sahara sand in snow The Connexion uses necessary cookies to help us provide you with a better user experience. By continuing to use this website, you accept our use of cookies. Accept French scientists call for samples of Sahara sand in snow Researchers in Toulouse and Grenoble have already received samples of snow flecked with Saharan sand, as part of their studies 14 February 2021 Sand from the Sahara caused orange skies and orange snow in France this week, as researchers launch a study into the phenomenonBy Hannah Thompson Scientists in France are calling on the public to help them analyse grains of Sahara sand embedded in snow, to test its chemical properties and help inform future weather models.