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Thomas Lempriere and James Clark Ross carve a marker on the Isle of the Dead in Van Diemen's Land to measure tidal variations, one of the earliest surviving benchmarks for sea level rise.

Historical image related to Thomas Lempriere and James Clark Ross carve a marker on the Isle of the Dead in Van Diemen's Land to measure tidal variations, one of the earliest surviving benchmarks for sea level rise. from July 1, 1841

Thomas Lempriere

British public official, author and artist (1796–1852)

Thomas James Lempriere was a British colonial administrator in the Australian colony of Van Diemen's Land. He is known for his diaries depicting the convict period in Van Diemen's Land, his work as a portrait and landscape painter, and his work as a pioneering naturalist.
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James Clark Ross

Royal Navy officer and explorer (1800–1862)

Rear-Admiral of the Red Sir James Clark Ross was a Royal Navy officer and explorer who explored both the North and South Poles. In the Arctic, he participated in two expeditions led by his uncle, John Ross, and in four led by William Edward Parry: in the Antarctic, he led his…
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Isle of the Dead (Tasmania)

Protected area in Tasmania, Australia

Isle of the Dead is an island, about 1 hectare in area, adjacent to Port Arthur, Tasmania, Australia. It is historically significant since it retains an Aboriginal coastal shell midden, one of the first recorded sea-level benchmarks, and one of the few preserved Australian…
Source: Wikipedia (CC BY-SA)

Van Diemen's Land

1825–1856 British colony, later called Tasmania

Van Diemen's Land was the colonial name of the island of Tasmania during the European exploration and colonisation of Australia in the 19th century. The Aboriginal-inhabited island was first visited by the Dutch ship captained by Abel Tasman in 1642, working under the…
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Sea level rise

Rise in sea levels due to climate change

The sea level has been rising from the end of the last ice age, which was around 20,000 years ago. Between 1901 and 2018, the average sea level rose by 15–25 cm (6–10 in), with an increase of 2.3 mm (0.091 in) per year since the 1970s. This was faster than the sea level had ever…
Source: Wikipedia (CC BY-SA)

July 1

Day of the year

July 1 is the 182nd day of the year in the Gregorian calendar; 183 days remain until the end of the year.
Source: Wikipedia (CC BY-SA)