Modern-day sea level rise skyrocketing

[웃 910]

Modern-day sea level rise skyrocketing Sea levels began rising precipitously in the late 19th century and have since tripled the rate of climb seen at any time in at least two millennia, a detailed analysis of North Carolina marsh sediments shows.

“This clearly shows the recent trend is not part of a natural cycle,” says Ken Miller of Rutgers University in Piscataway, New Jersey, who was not associated with the analysis.

Andrew Kemp of the University of Pennsylvania and his colleagues spent five years plumbing salt marsh sediments that had remained largely undisturbed for millennia. Kemp, now at Yale, and his team drilled cores at two sites, unearthing the microscopic remains of single-celled shelled organisms known as foraminifera.

Foraminifera vary in their salt tolerance. So as sea level changed over millennia, so did the mix of species living at any given site, explains University of Pennsylvania coauthor Benjamin Horton. Knowing the modern-day distribution of foraminifera at various water depths along the modern-day coast, the researchers could infer past sea levels at the two core sites from the abundance of different species in successive sediment layers. Radioisotope dating showed that the sediments recorded 2,100 years of sea level history, the researchers report online June 20 in the Proceedings of the National Academy of Sciences.

“We know what sea level has done, in a broad sense, going back 20,000 years,” Miller says. But detailed records of what’s happened over the past 2,000 years have been spotty, he says.

The cores show that sea level at the North Carolina sites was largely unchanging from 100 B.C. until A.D. 950. Then sea level underwent a four-century rise averaging 0.6 millimeters per year. Sea level didn’t rise again until after 1865. Since then, it’s been climbing an average of 2.1 millimeters annually. And at least for the last 80 years, Horton says, “the fit with North Carolina tide gauge data is one to one: It’s perfect.”

The results validate the use of general equations relating past temperatures and sea level changes to predict sea level rise as the climate continues to warm, says Aslak Grinsted of the University of Copenhagen’s Centre for Ice and Climate.

“What’s great about this new record is that it’s really high resolution and continuous,” Grinsted says, “and quite consistent with records all around the world.”

http://www.sciencenews.org/view/generic/id/331684/title/Modern-day_sea_level_rise_skyrocketing

[Gary and Alla 3,694]

Modern-day sea level rise skyrocketing Sea levels began rising precipitously in the late 19th century and have since tripled the rate of climb seen at any time in at least two millennia, a detailed analysis of North Carolina marsh sediments shows.

“This clearly shows the recent trend is not part of a natural cycle,” says Ken Miller of Rutgers University in Piscataway, New Jersey, who was not associated with the analysis.

Andrew Kemp of the University of Pennsylvania and his colleagues spent five years plumbing salt marsh sediments that had remained largely undisturbed for millennia. Kemp, now at Yale, and his team drilled cores at two sites, unearthing the microscopic remains of single-celled shelled organisms known as foraminifera.

Foraminifera vary in their salt tolerance. So as sea level changed over millennia, so did the mix of species living at any given site, explains University of Pennsylvania coauthor Benjamin Horton. Knowing the modern-day distribution of foraminifera at various water depths along the modern-day coast, the researchers could infer past sea levels at the two core sites from the abundance of different species in successive sediment layers. Radioisotope dating showed that the sediments recorded 2,100 years of sea level history, the researchers report online June 20 in the Proceedings of the National Academy of Sciences.

“We know what sea level has done, in a broad sense, going back 20,000 years,” Miller says. But detailed records of what’s happened over the past 2,000 years have been spotty, he says.

The cores show that sea level at the North Carolina sites was largely unchanging from 100 B.C. until A.D. 950. Then sea level underwent a four-century rise averaging 0.6 millimeters per year. Sea level didn’t rise again until after 1865. Since then, it’s been climbing an average of 2.1 millimeters annually. And at least for the last 80 years, Horton says, “the fit with North Carolina tide gauge data is one to one: It’s perfect.”

The results validate the use of general equations relating past temperatures and sea level changes to predict sea level rise as the climate continues to warm, says Aslak Grinsted of the University of Copenhagen’s Centre for Ice and Climate.

“What’s great about this new record is that it’s really high resolution and continuous,” Grinsted says, “and quite consistent with records all around the world.”

http://www.sciencenews.org/view/generic/id/331684/title/Modern-day_sea_level_rise_skyrocketing

I grew up in Runnels County TX. Pretty flat and dry place except for the mesas, steep walled flat topped "mountains" 400 feet high or so. We used to climb them as kids and find fossils of sea creatures in an area that is 300 miles from the "sea level". We were told in school that the area had been a "shallow sea" and that the mesas had been islands...millions of years ago. Can you imagine? So we know the sea levels went down, millions of years ago, and we know they were much higher millions of years ago.

So what caused it? Exactly how fast did the water rise, and fall, at that time?

[Gary and Alla 3,694]

Modern-day sea level rise skyrocketing Sea levels began rising precipitously in the late 19th century and have since tripled the rate of climb seen at any time in at least two millennia, a detailed analysis of North Carolina marsh sediments shows.

“This clearly shows the recent trend is not part of a natural cycle,” says Ken Miller of Rutgers University in Piscataway, New Jersey, who was not associated with the analysis.

Andrew Kemp of the University of Pennsylvania and his colleagues spent five years plumbing salt marsh sediments that had remained largely undisturbed for millennia. Kemp, now at Yale, and his team drilled cores at two sites, unearthing the microscopic remains of single-celled shelled organisms known as foraminifera.

Foraminifera vary in their salt tolerance. So as sea level changed over millennia, so did the mix of species living at any given site, explains University of Pennsylvania coauthor Benjamin Horton. Knowing the modern-day distribution of foraminifera at various water depths along the modern-day coast, the researchers could infer past sea levels at the two core sites from the abundance of different species in successive sediment layers. Radioisotope dating showed that the sediments recorded 2,100 years of sea level history, the researchers report online June 20 in the Proceedings of the National Academy of Sciences.

“We know what sea level has done, in a broad sense, going back 20,000 years,” Miller says. But detailed records of what’s happened over the past 2,000 years have been spotty, he says.

The cores show that sea level at the North Carolina sites was largely unchanging from 100 B.C. until A.D. 950. Then sea level underwent a four-century rise averaging 0.6 millimeters per year. Sea level didn’t rise again until after 1865. Since then, it’s been climbing an average of 2.1 millimeters annually. And at least for the last 80 years, Horton says, “the fit with North Carolina tide gauge data is one to one: It’s perfect.”

The results validate the use of general equations relating past temperatures and sea level changes to predict sea level rise as the climate continues to warm, says Aslak Grinsted of the University of Copenhagen’s Centre for Ice and Climate.

“What’s great about this new record is that it’s really high resolution and continuous,” Grinsted says, “and quite consistent with records all around the world.”

http://www.sciencenews.org/view/generic/id/331684/title/Modern-day_sea_level_rise_skyrocketing

So considerably less that the average 3 times daily tidal change in 150 years. Oh no.

[Usui Takumi 1,562]

I grew up in Runnels County TX. Pretty flat and dry place except for the mesas, steep walled flat topped "mountains" 400 feet high or so. We used to climb them as kids and find fossils of sea creatures in an area that is 300 miles from the "sea level". We were told in school that the area had been a "shallow sea" and that the mesas had been islands...millions of years ago. Can you imagine? So we know the sea levels went down, millions of years ago, and we know they were much higher millions of years ago.

So what caused it? Exactly how fast did the water rise, and fall, at that time?

Changes in temperature and the effects of plate techtonics.

[Gary and Alla 3,694]

Changes in temperature and the effects of plate techtonics.

Caused by? Man? Or did it just happen because there was no US congress to pass a tax bill?

[Usui Takumi 1,562]

Caused by? Man? Or did it just happen because there was no US congress to pass a tax bill?

[Gary and Alla 3,694]

No answer. Typical

Thank goodness this kind of answer has killed off GW consideration by thinking adults.

[Usui Takumi 1,562]

No answer. Typical

Thank goodness this kind of answer has killed off GW consideration by thinking adults.

Frankly your diatribes are so moronic they don't deserve one.

[Gary and Alla 3,694]

Frankly your diatribes are so moronic they don't deserve one.

Then I win!

[Usui Takumi 1,562]

Then I win!

At being moronic? Sure whatever...most people would rather not win at something like that, but you are special aren't you.

[Zero Sum 305]

I grew up in Runnels County TX. Pretty flat and dry place except for the mesas, steep walled flat topped "mountains" 400 feet high or so. We used to climb them as kids and find fossils of sea creatures in an area that is 300 miles from the "sea level". We were told in school that the area had been a "shallow sea" and that the mesas had been islands...millions of years ago. Can you imagine? So we know the sea levels went down, millions of years ago, and we know they were much higher millions of years ago.

So what caused it? Exactly how fast did the water rise, and fall, at that time?

You might want to read up on Continental Drift.

Damn I should have just read the last few posts here.

Winner, as usual.

[mawilson 2,133]

"Sea levels skyrocketing" makes me cringe.

[Zero Sum 305]

"Sea levels skyrocketing" makes me cringe.

NYC always gets hammered in natural catastrophe movies.

[slim 1,533]

What you folks are failing to take into account is when scientists say something is happening quickly... they mean thousands of years instead of millions.

[Zero Sum 305]

Or it could be that some people don't pay attention to the details being stated by the scientists.