If spaces designated for casual interaction are visually isolated or not along natural circulation patterns then it is difficult to casually use them.

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Armed with more certainty about the circulation patterns of the past, scientists will be able to better test how well the climate-change models are working, MacLeod adds.

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Air circulation patterns aboard standard commercial aircraft are side-to-side (laminar), with air entering the cabin from overhead, circulating across the aircraft and exiting the cabin near the floor.

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By analysing atmospheric circulation patterns, Dr Marinoni and her colleagues found that winds could bring soot and dust from as far away as Europe, the Middle East and North Africa.

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Local and regional newspapers have suffered similar patterns of falling circulation as national titles, which have been shedding readers, many of them seeking their news online, where advertising has also been migrating.

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