Concept

Geography of Jersey

Summary
Jersey (Jèrriais: Jèrri) is the largest of the Channel Islands, an island archipelago in the St. Malo bight in the western English Channel. It has a total area of and is part of the British Isles archipelago. It lies from the Cotenin Peninsula in Normandy, France and about from the south coast of Great Britain. Jersey lies within longitude -2° W and latitude 49° N. It has a coastline of 70 kilometres and no land connections to any other territories. Jersey claims a territorial sea of and an exclusive fishing zone of and shares maritime borders with the Bailiwick of Guernsey to the north and France to the south and east. Jersey is the main island of the Bailiwick of Jersey, which also consists of islet groups known as Les Écréhous, Les Minquiers, Les Dirouilles and Les Pierres de Lecq. It is a highly densely populated territory, being the 13th most densely populated country or territory. About 30% of the population of the island is concentrated in the parish of Saint Helier, which contains the main town of the island. Jersey has a generally mild, temperature and oceanic climate. The mean daily air temperature for 2019 was 12.79 °C - the eighth warmest year since 1894. The record warmest year was 2014, with a mean daily air temperature of 13.34 °C. There are very few extreme weather events in Jersey, however there are regular heatwaves and storm periods. This can lead to disruption across the island. For example, in February 2020, Storm Ciara led to the closure of a number of roads (especially Victoria Avenue). Besides the main island, the bailiwick includes other islets and reefs with no permanent population: Les Écréhous, Les Minquiers, Les Pierres de Lecq, Les Dirouilles. The highest point in the island is Les Platons on the north coast, at . Parts of the parish of St Clement in the south were previously below sea-level but the construction of a seawall and infilling of low land has probably left only a few pockets of land below mean sea level. The terrain is generally low-lying on the south coast, with some rocky headlands, rising gradually to rugged cliffs along the north coast.
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