When the Atlantic air pressure difference has been high, the productivity of crops in Europe have reduced by 2 per cent compared to the average. (sciencedaily.com)
During the other phase of NAO, when the air pressure difference is weaker, the same areas have shown positive changes, in crop productivity. (sciencedaily.com)
During the other phase of the North Atlantic Oscillation, when the air pressure difference is smaller, less than average amounts of mild air flow to Europe. (sciencedaily.com)