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The current forecast for global sea level rise is for 0.5 m by 2100, but in some parts of New Zealand, the effective rise in sea level could be twice as great by that time, because of the combined effect of gradual land subsidence. [7] Many different parts of the country are affected by the change in forecast sea level rise.
The South Island is a bit cooler, with maximum temperatures around 7–12 °C (45–54 °F), though sometimes lower. The lowest temperature ever recorded was −25.6 °C (−14.1 °F) at Ranfurly in Otago in 1903, with a more recent temperature of −21.6 °C (−6.9 °F) recorded in 1995 in nearby Ophir. [7]
The five reservoirs continue to operate today, supplying water. [30] Combined, the reservoirs supply approximately 26% of Auckland's potable water demand. The ranges receive an average of over 2,000 mm (78.75 inches) of rainfall annually while the corresponding rate in the city is less than half that. [31]
In situ measurements are mostly done at ground-level; however balloons are launched weekly and carry out in situ measurements through the atmosphere to altitudes of approximately 30 km. [23] Data from these balloons enables atmospheric profiles of temperature, pressure, water vapour, and ozone to be produced. [24]
The Hauraki Gulf / Tīkapa Moana is a coastal feature of the North Island of New Zealand.It has an area of 4000 km 2, [1] and lies between, in anticlockwise order, the Auckland Region, the Hauraki Plains, the Coromandel Peninsula, and Great Barrier Island.
The Auckland Islands – as with all of New Zealand's subantarctic islands – is a National Nature Reserve, afforded the highest possible level of protection under New Zealand law. In addition, a marine reserve encompasses all of the Auckland Islands territorial sea and internal waterways. [2]
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The ocean temperature plays a crucial role in the global climate system, ocean currents and for marine habitats. It varies depending on depth, geographical location and season. Not only does the temperature differ in seawater, so does the salinity. Warm surface water is generally saltier than the cooler deep or polar waters. [1]