The Transpolar Drift Stream is a major ocean current of the Arctic Ocean, transporting surface waters and sea ice from the Laptev Sea and the East Siberian Sea towards Fram Strait. Drift experiments with ships such as the Fram or the Tara expedition showed that the drift takes between two and four years. Recent satellite data and the most recent drift experiment, MOSAiC, shows that the current has accelerated and ice drifts much faster than earlier, in less than two years across the Arctic Ocean.