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Started by James Fox
Fri, 02 Mar 2012 00:39
Ocean acidification may be worst in 300 million years. Global-warming blamed.
Author: James Fox
Date: Fri, 02 Mar 2012 00:39
Date: Fri, 02 Mar 2012 00:39
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http://www.google.com/hostednews/afp/article/ALeqM5i_Z1zrB_r470q EJTpTvNGCLIZOew?docId=CNG.972672bf2c229393667b758b16f9bd6a.491 WASHINGTON � High levels of pollution may be turning the planet's oceans acidic at a faster rate than at any time in the past 300 million years, with unknown consequences for future sea life, researchers said Thursday. The acidification may be worse than during four major mass extinctions in history when natural pulses of carbon from asteroid impacts and volcanic eruptions caused global temperatures to soar, said the study in the journal Science. An international team of researchers from the United States, Britain, Spain, Germany and the Netherlands examined hundreds of paleoceanographic studies, including fossils wedged in seafloor sediment from millions of years ago. They found only one time in history that came close to what scientists are seeing today in terms of ocean life die-off -- a mysterious period known as the Paleocene-Eocene Thermal Maximum about 56 million years ago. Though the reason for the carbon upsurge back then remains a source of debate, scientists believe that the doubling of harmful emissions drove up global temperatures by about six degrees Celsius and caused big losses of ocean life. Oceans are particularly vulnerable because they soak up excess carbon dioxide from the air which turns the waters more acidic, a state that can kill corals, mollusks and other forms of reef and shell organisms. "We know that life during past ocean acidification events was not wiped out -- new species evolved to replace those that died off," said lead author Barbel Honisch, a paleoceanographer at Columbia University's Lamont-Doherty Earth Observatory. "But if industrial carbon emissions continue at the current pace, we may lose organisms we care about -- coral reefs, oysters, salmon." Honish and colleagues said the current rate of ocean acidification is at least 10 times faster than it was 56 million years ago. "The geological record suggests that the current acidification is potentially unparalleled in at least the last 300 million years of Earth history, and raises the possibility that we are entering an unknown territory of marine ecosystem change," said co-author Andy Ridgwell of Bristol University. The UN Environment Program released a report in 2010 that warned carbon emissions from fossil fuels may bear a greater risk for the marine environment than previously thought. Rising acidity levels have an impact on calcium-based lifeforms, ranging from tiny organisms called ptetropods that are the primary food source, to crabs, fish, lobsters and coral, it said. The UN report called for cuts in human-made CO2 emissions to reduce acidification and support for further work to quantify the risk and identify species that could be most in peril.
Re: Ocean acidification may be worst in 300 million years. Global-warming blamed.
Author: Unum
Date: Fri, 02 Mar 2012 03:09
Date: Fri, 02 Mar 2012 03:09
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On 3/1/2012 6:39 PM, James Fox wrote: > http://www.google.com/hostednews/afp/article/ALeqM5i_Z1zrB_r470q > EJTpTvNGCLIZOew?docId=CNG.972672bf2c229393667b758b16f9bd6a.491 > > WASHINGTON � High levels of pollution may be turning the > planet's oceans acidic at a faster rate than at any time in the > past 300 million years, with unknown consequences for future sea > life, researchers said Thursday. > > The acidification may be worse than during four major mass > extinctions in history when natural pulses of carbon from > asteroid impacts and volcanic eruptions caused global > temperatures to soar, said the study in the journal Science. > > An international team of researchers from the United States, > Britain, Spain, Germany and the Netherlands examined hundreds of > paleoceanographic studies, including fossils wedged in seafloor > sediment from millions of years ago. > > They found only one time in history that came close to what > scientists are seeing today in terms of ocean life die-off -- a > mysterious period known as the Paleocene-Eocene Thermal Maximum > about 56 million years ago. > > Though the reason for the carbon upsurge back then remains a > source of debate, scientists believe that the doubling of > harmful emissions drove up global temperatures by about six > degrees Celsius and caused big losses of ocean life. > > Oceans are particularly vulnerable because they soak up excess > carbon dioxide from the air which turns the waters more acidic, > a state that can kill corals, mollusks and other forms of reef > and shell organisms. > > "We know that life during past ocean acidification events was > not wiped out -- new species evolved to replace those that died > off," said lead author Barbel Honisch, a paleoceanographer at > Columbia University's Lamont-Doherty Earth Observatory. > > "But if industrial carbon emissions continue at the current > pace, we may lose organisms we care about -- coral reefs, > oysters, salmon." > > Honish and colleagues said the current rate of ocean > acidification is at least 10 times faster than it was 56 million > years ago. > > "The geological record suggests that the current acidification > is potentially unparalleled in at least the last 300 million > years of Earth history, and raises the possibility that we are > entering an unknown territory of marine ecosystem change," said > co-author Andy Ridgwell of Bristol University. > > The UN Environment Program released a report in 2010 that warned > carbon emissions from fossil fuels may bear a greater risk for > the marine environment than previously thought. > > Rising acidity levels have an impact on calcium-based lifeforms, > ranging from tiny organisms called ptetropods that are the > primary food source, to crabs, fish, lobsters and coral, it said. > > The UN report called for cuts in human-made CO2 emissions to > reduce acidification and support for further work to quantify > the risk and identify species that could be most in peril. The denialist nutjobs can't even come up with a blog post to cite in response to this?
Re: Ocean acidification may be worst in 300 million years. Global-warming blamed.
Author: James
Date: Fri, 02 Mar 2012 17:01
Date: Fri, 02 Mar 2012 17:01
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"Unum" <noneof@yourbusiness.com> wrote in message news:jipdm5$i1q$1@dont-email.me > On 3/1/2012 6:39 PM, James Fox wrote: >> http://www.google.com/hostednews/afp/article/ALeqM5i_Z1zrB_r470q >> EJTpTvNGCLIZOew?docId=CNG.972672bf2c229393667b758b16f9bd6a.491 >> >> WASHINGTON � High levels of pollution may be turning the >> planet's oceans acidic at a faster rate than at any time in the >> past 300 million years, with unknown consequences for future sea >> life, researchers said Thursday. >> >> The acidification may be worse than during four major mass >> extinctions in history when natural pulses of carbon from >> asteroid impacts and volcanic eruptions caused global >> temperatures to soar, said the study in the journal Science. >> >> An international team of researchers from the United States, >> Britain, Spain, Germany and the Netherlands examined hundreds of >> paleoceanographic studies, including fossils wedged in seafloor >> sediment from millions of years ago. >> >> They found only one time in history that came close to what >> scientists are seeing today in terms of ocean life die-off -- a >> mysterious period known as the Paleocene-Eocene Thermal Maximum >> about 56 million years ago. >> >> Though the reason for the carbon upsurge back then remains a >> source of debate, scientists believe that the doubling of >> harmful emissions drove up global temperatures by about six >> degrees Celsius and caused big losses of ocean life. >> >> Oceans are particularly vulnerable because they soak up excess >> carbon dioxide from the air which turns the waters more acidic, >> a state that can kill corals, mollusks and other forms of reef >> and shell organisms. >> >> "We know that life during past ocean acidification events was >> not wiped out -- new species evolved to replace those that died >> off," said lead author Barbel Honisch, a paleoceanographer at >> Columbia University's Lamont-Doherty Earth Observatory. >> >> "But if industrial carbon emissions continue at the current >> pace, we may lose organisms we care about -- coral reefs, >> oysters, salmon." >> >> Honish and colleagues said the current rate of ocean >> acidification is at least 10 times faster than it was 56 million >> years ago. >> >> "The geological record suggests that the current acidification >> is potentially unparalleled in at least the last 300 million >> years of Earth history, and raises the possibility that we are >> entering an unknown territory of marine ecosystem change," said >> co-author Andy Ridgwell of Bristol University. >> >> The UN Environment Program released a report in 2010 that warned >> carbon emissions from fossil fuels may bear a greater risk for >> the marine environment than previously thought. >> >> Rising acidity levels have an impact on calcium-based lifeforms, >> ranging from tiny organisms called ptetropods that are the >> primary food source, to crabs, fish, lobsters and coral, it said. >> >> The UN report called for cuts in human-made CO2 emissions to >> reduce acidification and support for further work to quantify >> the risk and identify species that could be most in peril. > > The denialist nutjobs can't even come up with a blog post > to cite in response to this? Ocean acidification may not be worst in 300 million years.
Re: Ocean acidification may be worst in 300 million years. Global-warming blamed.
Author: alanmc95210
Date: Sat, 03 Mar 2012 05:39
Date: Sat, 03 Mar 2012 05:39
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On Mar 2, 9:01 am, "James" <kingk...@iglou.com> wrote: > "Unum" <non...@yourbusiness.com> wrote in message > > news:jipdm5$i1q$1@dont-email.me > > > > > > > > > On 3/1/2012 6:39 PM, James Fox wrote: > >>http://www.google.com/hostednews/afp/article/ALeqM5i_Z1zrB_r470q > >> EJTpTvNGCLIZOew?docId=CNG.972672bf2c229393667b758b16f9bd6a.491 > > >> WASHINGTON — High levels of pollution may be turning the > >> planet's oceans acidic at a faster rate than at any time in the > >> past 300 million years, with unknown consequences for future sea > >> life, researchers said Thursday. > > >> The acidification may be worse than during four major mass > >> extinctions in history when natural pulses of carbon from > >> asteroid impacts and volcanic eruptions caused global > >> temperatures to soar, said the study in the journal Science. > > >> An international team of researchers from the United States, > >> Britain, Spain, Germany and the Netherlands examined hundreds of > >> paleoceanographic studies, including fossils wedged in seafloor > >> sediment from millions of years ago. > > >> They found only one time in history that came close to what > >> scientists are seeing today in terms of ocean life die-off -- a > >> mysterious period known as the Paleocene-Eocene Thermal Maximum > >> about 56 million years ago. > > >> Though the reason for the carbon upsurge back then remains a > >> source of debate, scientists believe that the doubling of > >> harmful emissions drove up global temperatures by about six > >> degrees Celsius and caused big losses of ocean life. > > >> Oceans are particularly vulnerable because they soak up excess > >> carbon dioxide from the air which turns the waters more acidic, > >> a state that can kill corals, mollusks and other forms of reef > >> and shell organisms. > > >> "We know that life during past ocean acidification events was > >> not wiped out -- new species evolved to replace those that died > >> off," said lead author Barbel Honisch, a paleoceanographer at > >> Columbia University's Lamont-Doherty Earth Observatory. > > >> "But if industrial carbon emissions continue at the current > >> pace, we may lose organisms we care about -- coral reefs, > >> oysters, salmon." > > >> Honish and colleagues said the current rate of ocean > >> acidification is at least 10 times faster than it was 56 million > >> years ago. > > >> "The geological record suggests that the current acidification > >> is potentially unparalleled in at least the last 300 million > >> years of Earth history, and raises the possibility that we are > >> entering an unknown territory of marine ecosystem change," said > >> co-author Andy Ridgwell of Bristol University. > > >> The UN Environment Program released a report in 2010 that warned > >> carbon emissions from fossil fuels may bear a greater risk for > >> the marine environment than previously thought. > > >> Rising acidity levels have an impact on calcium-based lifeforms, > >> ranging from tiny organisms called ptetropods that are the > >> primary food source, to crabs, fish, lobsters and coral, it said. > > >> The UN report called for cuts in human-made CO2 emissions to > >> reduce acidification and support for further work to quantify > >> the risk and identify species that could be most in peril. > > > The denialist nutjobs can't even come up with a blog post > > to cite in response to this? > > Ocean acidification may not be worst in 300 million years. There's 40 to 60 times as much carbon in the oceans NOW as there is in the atmosphere. We couldn't change the acidity of the oceans significantly if we TRIED.- http://folk.uio.no/tomvs/esef/ESEFVO1.pdf "The distribution of CO2 between atmosphere, hydrosphere, and lithosphere; minimal influence from anthropogenic CO2 on the global "Greenhouse Effect". Tom V. Segalstad Mineralogical-Geological Museum University of Oslo" - A. McIntire
Re: Ocean acidification may be worst in 300 million years. Global-warming blamed.
Author: Bret Cahill
Date: Sat, 03 Mar 2012 05:57
Date: Sat, 03 Mar 2012 05:57
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> WASHINGTON — High levels of pollution may be turning the > planet's oceans acidic at a faster rate than at any time in the > past 300 million years, with unknown consequences for future sea > life, researchers said Thursday. > > The acidification may be worse than during four major mass > extinctions in history when natural pulses of carbon from > asteroid impacts and volcanic eruptions caused global > temperatures to soar, said the study in the journal Science. > > An international team of researchers from the United States, > Britain, Spain, Germany and the Netherlands examined hundreds of > paleoceanographic studies, including fossils wedged in seafloor > sediment from millions of years ago. > > They found only one time in history that came close to what > scientists are seeing today in terms of ocean life die-off -- a > mysterious period known as the Paleocene-Eocene Thermal Maximum > about 56 million years ago. > > Though the reason for the carbon upsurge back then remains a > source of debate, scientists believe that the doubling of > harmful emissions drove up global temperatures by about six > degrees Celsius and caused big losses of ocean life. > > Oceans are particularly vulnerable because they soak up excess > carbon dioxide from the air which turns the waters more acidic, > a state that can kill corals, mollusks and other forms of reef > and shell organisms. > > "We know that life during past ocean acidification events was > not wiped out -- new species evolved to replace those that died > off," said lead author Barbel Honisch, a paleoceanographer at > Columbia University's Lamont-Doherty Earth Observatory. > > "But if industrial carbon emissions continue at the current > pace, we may lose organisms we care about -- coral reefs, > oysters, salmon." > > Honish and colleagues said the current rate of ocean > acidification is at least 10 times faster than it was 56 million > years ago. > > "The geological record suggests that the current acidification > is potentially unparalleled in at least the last 300 million > years of Earth history, and raises the possibility that we are > entering an unknown territory of marine ecosystem change," said > co-author Andy Ridgwell of Bristol University. > > The UN Environment Program released a report in 2010 that warned > carbon emissions from fossil fuels may bear a greater risk for > the marine environment than previously thought. > > Rising acidity levels have an impact on calcium-based lifeforms, > ranging from tiny organisms called ptetropods that are the > primary food source, to crabs, fish, lobsters and coral, it said. > > The UN report called for cuts in human-made CO2 emissions to > reduce acidification and support for further work to quantify > the risk and identify species that could be most in peril. Supposedly 20% of protein (for humans) comes from the oceans. Bret Cahill
Re: Ocean acidification may be worst in 300 million years. Global-warming blamed.
Author: Shall not be infringed
Date: Sat, 03 Mar 2012 15:49
Date: Sat, 03 Mar 2012 15:49
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On Mar 1, 7:39 pm, "James Fox" <j...@about.com> wrote: > http://www.google.com/hostednews/afp/article/ALeqM5i_Z1zrB_r470q > EJTpTvNGCLIZOew?docId=CNG.972672bf2c229393667b758b16f9bd6a.491 > > WASHINGTON — High levels of pollution may be turning the > planet's oceans acidic at a faster rate than at any time in the > past 300 million years, with unknown consequences for future sea > life, researchers said Thursday. > > The acidification may be worse than during four major mass > extinctions in history when natural pulses of carbon from > asteroid impacts and volcanic eruptions caused global > temperatures to soar, said the study in the journal Science. Except that the ejecta from the impact and other eruptions, and the smoke particulates from the resultant mass fires is supposed to cause a "nuclear winter" scenario. That is all. Dismissed.
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