Gulf of Ob
|Gulf of Ob|
Map showing the location of the Gulf of Ob.
|River sources||Ob River|
|Ocean/sea sources||Kara Sea|
|Average depth||10–12 m (33–39 ft)|
|Official name||Islands in Ob Estuary, Kara Sea|
|Designated||13 September 1994|
The Gulf of Ob (also known as Ob Bay) (Russian: О́бская губа́, Obskaya guba) is a bay of the Arctic Ocean, located in Northern Russia at the mouth of the Ob River. It is the world's longest estuary.
The mouth of the Gulf of Ob is in the Kara Sea between the Gydan and Yamal peninsulas. It is about 1,000 km (620 mi) long and varies in width from about 50 to 80 km (31 to 50 mi), and generally runs north and south. The gulf is relatively shallow, with an average depth from 10 to 12 metres (33 to 39 ft), which restricts heavy sea transport. The Taz Estuary is an eastern side-branch formed by the Taz River.
There are several islands near the mouth of the Ob, at the beginning of the estuary, such as Khaley Island. All these islands are close to the shore and they are generally flat and low-lying. They are protected wetlands under Ramsar. Further north, except for a few islands located close to the shore, such as Khalevigo and Nyavigo, the Gulf of Ob is free of islands until it meets the Kara Sea.
Very large gas and oil deposits have been discovered in this region. Oil and gas from the wells are sent South via pipeline and rail transport. The Yamburg gas field is the world's third largest natural gas field, and is located between the southern portion of the gulf and the Taz Estuary to the east. A new port is being developed at Sabetta, on the west bank of the gulf.
- "Islands in Ob Estuary, Kara Sea". Ramsar Sites Information Service. Retrieved 25 April 2018.
- "Gulf of Ob." Earthsnapshot.com. Accessed June 2011.
- Solovyev A. B..Platonov G. N.. Glazov M. D.. hpak V. O.. V. V. Rozhnov V. V.. 2012. Distribution of beluga whales (Delphinapterus leucas) in the Russian Arctic seas according to the results of expedition aboard RV Mikhail Somov, September–November 2010. December 2012, Biology Bulletin, Volume 39, Issue 7, pp.654–658, DOI: 10.1134/S1062359012070102, SpringerLink
- "Port of Sabetta". Ship Technology. Retrieved 12 January 2015.
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