in scotland, where i've been finding out how our warming world is affecting life here at the cairngorm mountainsthat are changing, but the summers, too. we're high in the mountains and snow is disappearing completely more frequently. patches of snow that can survive in the mountains from one winter to the next are now melting away more often. what is historically the uk's longest—lasting patch of snow disappeared in 2021 for what is said to be only the eighth time in 300 years, with the majority of these meltings happening since 2000. iain cameron has been documenting scotland's snow patches for 25 years. i asked him why he does it and what he's discovered tells us about the impact of climate change in these highlands. the snow that i look at is a relic, or they are relics, of previous winters�* falls and they persist on the shaded gullies and cliffs of the scottish highlands well into summer and often beyond. in fact, some persist right through the year. so, in summer and autumn, you can often find me with my boots on, trudging around the highlands of scotland, looking for the last vestiges of

i have come to cairngorm mountain in the heart of the scottish highlands, the ski resort has been growingred days and a a chance of more days above the threshold needed for snow to fall. you are the land manager here, gmeim, you have been doing it for 25 years, what are the changes you have noticed in terms of weather systems and snow conditions? that's right. i think the baseline temperature has changed, less than one degree, but the maximum and minimum temperature we are seeing have changed. we are getting more extremes, so we might be getting warmer summers or warmer temperatures and bigger snowfalls as well. so in any given year there can be big anomalies as it goes through. so, it's adapting to these storm cycles that seem to be getting stronger these days. the irony is last winter you had huge amounts of snow but of course due to lockdown nobody could use it. that's right. phenomenal amounts at this level. what was different about last year, it was really stable. we had cold weather patterns with long periods with no wind at all, which is ideal conditions for skiing. every year is d