New Zealand Sea Level Change

[GordMay]

New Zealand faces major sea rise ‘much sooner than we thought’

While the global sea level is expected to rise 5 metres by 2100, for large parts of New Zealand, it could be 1 metre, because the land is sinking too, due to the movement of tectonic plates.
A huge new public data set shows many communities are sinking, speeding up the effects of sea level rise.
A lucky few are rising, making for wildly varying situations around the coast.
While much of the country is sinking, including Auckland, Wellington and parts of Christchurch, there are places like Tauranga and the small community of Pīkowhai that are actually rising.
Another observation from the piece, based on research for former parliamentary commissioner for the environment Jan Wright, finds that just 30cm higher seas would turn a one-in-100-year flood event in Wellington into an annual event.

Due to high traffic volume the maps may take longer than usual to load.
MAPS ➥ https://www.searise.nz/maps

More about ➥ https://interactives.stuff.co.nz/202...ea-level-rise/

NZ SeaRise
The NZ SeaRise: Te Tai Pari O Aotearoa programme has released location specific sea level rise projections out to the year 2300 for every 2 km of the coast of Aotearoa New Zealand. These projections can be accessed through a new online tool developed by Takiwā, a data management and analytics platform.
➥ https://searise.takiwa.co/map/6233f4...18373db9/embed

Recent publications from NZ SeaRise
➥ https://www.searise.nz/publications

Draft national adaptation plan. Wellington: Ministry for the Environment [2022]
➥ https://environment.govt.nz/assets/p...ation-plan.pdf

[GordMay]

“Carbon dioxide now more than 50% higher than pre-industrial levels” ~ NOAA June 3/22
Concentrations of carbon dioxide in the atmosphere in May [450+ ppm] were 50 percent higher than during the pre-industrial era, reaching levels not seen on Earth for about four million years, the main US climate agency said on Friday.

NOAA's measurements of carbon dioxide at the mountaintop observatory on Hawaii’s Big Island averaged 420.99 parts per million (ppm), an increase of 1.8 ppm over 2021. Scientists at Scripps, which maintains an independent record, calculated a monthly average of 420.78 ppm.

Last May, the rate was 419ppm, and in 2020, 417ppm.

Before the Industrial Revolution, levels of CO2 held steady at about 280 ppm, a level maintained for approximately 6,000 years of human civilisation, that preceded industrialisation, according to NOAA.
The current level is comparable to what it was between 4.1 and 4.5 million years ago, when CO2 levels were near or above 400ppm. At that time, sea levels were between five and 25 metres, higher than now.

More ➥ https://www.noaa.gov/news-release/ca...ustrial-levels

To visualize how sea level rise may affect your [US] community, visit NOAA’s sea level rise viewer, at: ➥ https://coast.noaa.gov/slr/