claim: The motions of the massive oceans where heat is moved between deep layers and the surface provides variability on time scales from years to centuries.
evidence: The climate of most of Scotland is temperate and oceanic, and tends to be very changeable., As it is warmed by the Gulf Stream from the Atlantic, it has much milder winters (but cooler, wetter summers) than areas on similar latitudes, such as Labrador, southern Scandinavia, the Moscow region in Russia, and the Kamchatka Peninsula on the opposite side of Eurasia.