The changing temperature and chemistry of the Arctic Ocean and Bering Sea are likely changing their role in global ocean circulation and
as carbon sinks for atmospheric CO2 respectively, although the importance of these changes in the global carbon budget remains unresolved.
Not exact matches
The Globe «s Jeffrey Simpson offers Canadian politicians plaudits
for the following good deeds: Ed Stelmach's decision to fund research into
carbon capture and storage; Dalton McGuinty's decision to protect the boreal forest (because «untouched forests are wonderful
carbon sinks») and to sign on to the Western Climate Initiative; Stephen Harper
for agreeing to pour money into Ontario infrastructure; and the premiers
for finally agreeing «that within one sovereign country, there ought to be
as few obstacles to the movement of people and capital
as possible.»
For example, soil is second only to oceans
as the planet's largest
carbon sink, while agriculture and land use changes represent the second largest source of greenhouse gas emissions.
Beyond their value
as carbon sinks, or medical plunder, plants are now seen to have value in terms of the vast gene bank they represent
for crops, their ecosystem services and
as «natural», spiritual capital.
«
As vital
carbon sinks and habitats
for millions of people and imperilled wildlife, it is well known that forest protection is essential
for any environmental solution — yet not all forests are equal,» said Professor James Watson of WCS and the University of Queensland.
«Understanding which trees in the forest are most vulnerable to drought is quite important
for understanding whether [they will] continue to act
as a strong
carbon sink in a rapidly changing climate,» he said in an email.
Lead author PhD student Adam Hejnowicz said: «Seagrass meadows could play a vital role in combating climate change
as they are regarded
as a net global
sink for carbon.They have the capacity to bury significant deposits of organic
carbon beneath the sediment, up to many metres thick in places and over millenary time scales.»
The U.N. Convention to Combat Desertification estimates that soil,
as a
sink for carbon dioxide, provides a larger reservoir than either vegetation or the atmosphere, calling its sequestration capabilities «unparalleled.»
The approach ranked
as the study's least viable strategy, in part because less than a quarter of the algae could be expected to eventually
sink to the bottom of the ocean, which would be the only way that
carbon would be sequestered
for a long period of time.
For example, they may help researchers understand the full — and perhaps changing — potential for the plankton ecosystem to act as a sink to absorb carbon dioxide from the a
For example, they may help researchers understand the full — and perhaps changing — potential
for the plankton ecosystem to act as a sink to absorb carbon dioxide from the a
for the plankton ecosystem to act
as a
sink to absorb
carbon dioxide from the air.
Accounting
for biomass energy often ignores the critical role forests play
as a
sink for carbon dioxide that might otherwise accumulate in the atmosphere.
In using the model to assess the ocean -
carbon sink, the researchers assumed a «business
as usual»
carbon dioxide emissions trajectory, the Representative Concentration Pathway 8.5 scenario found in the Intergovernmental Panel on Climate Change
for 2006 - 2010, where emissions continue to rise throughout the 21st century.
For example, in higher latitudes such
as northern Canada and Greenland, coastal waters usually act
as carbon sinks, absorbing excess
carbon dioxide from the atmosphere.
Lal first came to the idea of soil
as a powerful
carbon sink (pdf) not through an interest in climate change, but rather out of concern
for the land itself and the people who depend on its productivity.
The north Atlantic Ocean is globally important,
as it is a
sink for atmospheric
carbon dioxide, said Eric Achterberg, chief scientist
for the research cruise and lead author of the study.
For Arrigo, who has extensively studied carbon cycles, an important implication of higher productivity in polynyas is for their role as carbon sin
For Arrigo, who has extensively studied
carbon cycles, an important implication of higher productivity in polynyas is
for their role as carbon sin
for their role
as carbon sinks.
«Marine phytoplankton absorb
carbon in the same way
as trees on land, and when phytoplankton die and
sink into the deep ocean, the
carbon they contain is locked away
for thousands of years.
So,
as carbon dioxide continued to rise, its fertilising effect on plants continued but respiration weakened
for a while, strengthening the overall land
carbon sink.
Major
sinks, likewise:
for example,
as continents collided, mountain - ranges were formed, making phenomenal amounts of rock debris available to weathering - agents, of which
carbon dioxide dissolved in rainwater is one of the most important.
As for plants soaking up the excess, forests and other vegetation are indeed major
carbon sinks that can absorb lots of
carbon — in other words, healthy forests could offset some of our global warming pollution.
ATM will also soon offer
carbon,
as well
as a line of fish food that will include floating and
sinking pellets
for fresh and saltwater.
Healthy soils are not only essential
for the production of food but are a vital part of our global ecosystem, acting
as a
carbon sink to reduce the impact of climate change.
If not, might not we want to assume,
for the sake of risk assessment, that this will drive faster break down in the system and faster heating of the planet
as the ability of the ocean to support life is diminished, and likely it's ability to continue to act
as a
carbon sink?
The process has dire consequences
for climate, because forests like the Amazon serve
as essential
carbon sinks as long
as they are left intact.
Future studies of the
carbon system in the oceans should be designed to identify and quantitatively assess these feedback mechanisms to provide input to models that will determine the ocean's future role
as a
sink for anthropogenic CO2.
Neither the terrestrial nor the marine
carbon sinks have known large - scale thesholds yet they are exceedingly important
for the functioning of the climate system, which does indeed have known large - scale thresholds such
as the melting of the Greenland ice sheet.
Funny how difficult it is
for him and his fellow denialati to look at 1) where that
carbon came from 2) its isotopic composition 3) the fact that it takes a while
for permafrost to melt and oceans to become a source rather than a
sink 4) the fact that humans are producing about 2x
as much
carbon as is going into the atmosphere 5) the remaining CO2 is acidifying the oceans
I never said that modest changes in vegetation would act
as a
sink for all the
carbon emissions.
Natural
carbon sinks such
as soils and forests that are not burned
for fuel, are less likely to have unintended consequences.
fourth, Jeff Huggins (5) I want to thank you
for being so honest in expressing your view that any mention of things such
as a potentially large
carbon sink is merely a distraction when the REAL story that should be covered is the oil industry.
The role of the world's forests
as a «
sink»
for atmospheric
carbon dioxide is the subject of active debate.
Peatlands like bogs and fens have been in the spotlight
for some time
for their role in climate change, both
as carbon sinks and
as methane sources.
Those three facts suggest that most if not all of the observed increase in CO2 is natural unless it can be shown that
for some reason warming oceans can nevertheless act
as a
carbon sink rather than a
carbon source.
Berry claims that nature is responsible
for carbon increases from 280ppm to 373ppm, yet it is well established that nature is acting
as carbon sink from the ocean and biomass.
«In addition to providing essential ecosystem services, including water regulation across the landscape and habitat
for unique biodiversity, peatlands are globally important
for their prominent role
as a
carbon pool and
sink,» says Kristell Hergoualc» h, a CIFOR scientist, and contributor to the special issue and IUFRO session.
For the d13C levels of several parts of the
carbon cycle see: http://homepage.mac.com/uriarte/
carbon13.html There are only two sources of low d13C on earth: fossil fuels and vegetation decay, but
as the biosphere is an overall
carbon sink, thus specifically a 12C
sink, it can't be a 13C
sink.
After incorporating these «indirect emission» effects from changes in land use, often into areas valuable
as carbon sinks, the analysis found that biofuels produced from vegetable oils are likely to be worse
for the climate than fossil fuels.
«Cutting trees
for fuel is antithetical to the important role that forests play
as a
sink for CO2 that might otherwise accumulate in the atmosphere,» Schlesinger writes in an article published yesterday in the journal Science, adding later that
carbon neutrality «is only achieved» if harvested forests are allowed to regrow more biomass than was lost.
for article Corrigendum: The seasonal sea - ice zone in the glacial Southern Ocean
as a
carbon sink.
As for plants soaking up the excess, forests and other vegetation are indeed major
carbon sinks that can absorb lots of
carbon — in other words, healthy forests could offset some of our global warming pollution.
The Earth balances CO2 emissions with
carbon sinks that absorb and release it
as they have done
for much of its 4.5 billion years of existence.
for article The seasonal sea - ice zone in the glacial Southern Ocean
as a
carbon sink.
The existence of this oceanic
carbon pump also raises questions about the need
for a large terrestrial
carbon sink in the Northern Hemisphere,
as postulated by Tans et al. 3, to balance the present global
carbon budget.
Update Dec. 12, 10:55: The deal also calls
for balancing out
carbon emissions caused by humans with those that can be absorbed back in by
sinks (such
as trees and oceans).
It called on the UNFCCC to use the most recent IPCC guidance and guidelines
as a basis
for estimating anthropogenic forest - related greenhouse gas emissions by sources and removals by
sinks, forest
carbon stocks and forest area changes.
And I have repeatedly pointed out that you guys consistently mistake unverified models
for reality, and don't know anything worth mentioning about Linear Systems theory, tracer measurements, or why the
sink rate
for each
carbon isotope (in CO2) is the same
as each of the others and the same
as all of them put together.
For further reading on the research on the role of forests as carbon sinks and emerging research, I recommend The hunt for the world's missing carbon by Gabriel Popkin in Nature Ne
For further reading on the research on the role of forests
as carbon sinks and emerging research, I recommend The hunt
for the world's missing carbon by Gabriel Popkin in Nature Ne
for the world's missing
carbon by Gabriel Popkin in Nature News.
Since CO2 from coal - generated electricity used
for air conditioning would be tiny compared to ocean CO2 flux, the temperature influences CO2
as only a Natural mechanism and will affect both sources and
sinks of
carbon.
Or if the capacity of the
sinks decreases so that they can not
sink the
carbon as fast
as they did before, that is another reason
for the level of atmospheric CO2 to increase
as well.
The oceans are acting
as a heat
sink for rising temperatures and have absorbed about one - third of the
carbon dioxide produced by human activities.