Yamal Peninsula in the context of Baydaratskaya Bay

The Gyda Peninsula (Russian: Гыда́нский полуо́стров, romanized: Gydansky poluostrov) is a geographical feature of the Siberian coast in the Kara Sea. It takes its name from the river Gyda, that flows on the peninsula. It is roughly 400 km long and 360 km wide. This wide peninsula lies between the estuaries of the Ob (Gulf of Ob) and Yenisei Rivers (Yenisei Gulf). The southwestern corner of the peninsula is limited by the Taz Estuary, and across the river lies the Yamal Peninsula. The climate in the whole area is arctic and harsh.

A kettle (also known as a kettle hole, kettlehole, pothole, or, in parts of the United Kingdom, pingo) is a depression or hole in an outwash plain formed by retreating glaciers or draining floodwaters. The kettles are formed as a result of blocks of dead ice left behind by retreating glaciers, which become surrounded by sediment deposited by meltwater streams as there is increased friction. The ice becomes buried in the sediment and when the ice melts, a depression is left called a kettle hole, creating a dimpled appearance on the outwash plain. Lakes often fill these kettles; these are called kettle hole lakes. Another source is the sudden drainage of an ice-dammed lake and when the block melts, the hole it leaves behind is a kettle. As the ice melts, ramparts can form around the edge of the kettle hole. The lakes that fill these holes are seldom more than 10 m (33 ft) deep and eventually fill with sediment. In acidic conditions, a kettle bog may form but in alkaline conditions, it will be kettle peatland.

Dendroclimatology is the science of determining past climates from trees (primarily properties of the annual tree rings). Tree rings are wider when conditions favor growth, narrower when times are difficult. Other properties of the annual rings, such as maximum latewood density (MXD) have been shown to be better proxies than simple ring width. Using tree rings, scientists have estimated many local climates for hundreds to thousands of years previous. By combining multiple tree-ring studies (sometimes with other climate proxy records), scientists have estimated past regional and global climates.

Yamal (Russian: Ямал) is a Russian Arktika-class nuclear-powered icebreaker operated by Atomflot (formerly by the Murmansk Shipping Company). She is named after the Yamal Peninsula in Northwest Siberia; the name means End of the Land in Nenets.

Laid down in Leningrad in 1986, and commissioned in October 1992, after the breakup of the Soviet Union, she filled her designed role of keeping shipping lanes open and also carried passengers on Arctic excursions. In July 1994 Yamal took an excursion to the North Pole, with the NSF (National Science Foundation – US), to celebrate the official maiden voyage. While at the exact North Pole (verified by GPS & Inmarsat satellite coordinates) the crew and passengers celebrated with a barbeque – the ambient temperature was −23 °C (−9 °F) (wind gusts were measured at −40 °C (−40 °F)). Because of the ship 90/90 coordinates the ship captain (Smirnov) organized a swimming party with Will Rountree (US) being recorded as the first person to ever swim there (21 July 1994) – water temperature was below freezing, ranging from 0 to −1.8 °C (32 to 29 °F). In 2007 Lewis Gordon Pugh swam a kilometer at the North Pole, having sailed there aboard Yamal.