Posts
What is Abrupt Climate Change?
8
October, 2013
Abrupt
climate change is defined by the IPCC as a large-scale change in the
climate system that takes place over a few decades or less, persists
(or is anticipated to persist) for at least a few decades, and
causes substantial disruptions in human and natural
systems.
Examples of components susceptible to such abrupt change are clathrate methane release, tropical and boreal forest dieback, disappearance of summer sea ice in the Arctic Ocean, long-term drought and monsoonal circulation.
Deposits of methane clathrates below the sea floor are susceptible to destabilization via ocean warming.
Anthropogenic warming will very likely lead to enhanced methane emissions from both terrestrial and oceanic clathrates.
Above extracted from:
- Intergovenmental Panel on Climate Change (IPCC), AR5 Workgroup 1, Technical Summary
New Finding Shows Climate Change Can Happen in a Geological Instant
The Paleocene/Eocene thermal maximum (PETM) is a climate shift that occurred 55 million years ago.
Examples of components susceptible to such abrupt change are clathrate methane release, tropical and boreal forest dieback, disappearance of summer sea ice in the Arctic Ocean, long-term drought and monsoonal circulation.
Deposits of methane clathrates below the sea floor are susceptible to destabilization via ocean warming.
Anthropogenic warming will very likely lead to enhanced methane emissions from both terrestrial and oceanic clathrates.
Above extracted from:
- Intergovenmental Panel on Climate Change (IPCC), AR5 Workgroup 1, Technical Summary
New Finding Shows Climate Change Can Happen in a Geological Instant
The Paleocene/Eocene thermal maximum (PETM) is a climate shift that occurred 55 million years ago.
 |
In
a new paper in the Proceedings
of the National Academy of Sciences,
Morgan Schaller and James Wright present their finding that climate
change can and did happen abruptly, or in geological terms,
instantaneously.
Following a doubling in carbon dioxide levels, the surface of the ocean turned acidic over a period of weeks or months and global temperatures rose by 5 degrees centigrade – all in the space of about 13 years.
“We’ve shown unequivocally what happens when CO2 increases dramatically – as it is now, and as it did 55 million years ago,” James Wright said.
The film below goes into more detail regarding the current situation.
New Film: Last Hours
The film “Last Hours” describes a science-based climate scenario where a tipping point to runaway climate change is triggered by massive releases of frozen methane. Methane, a powerful greenhouse gas, has already started to percolate into the open seas and atmosphere from methane hydrate deposits beneath melting arctic ice, from the warming northern-hemisphere tundra, and from worldwide continental-shelf undersea methane pools.
“Last Hours” is narrated by Thom Hartmann and directed by Leila Conners. Executive Producers are George DiCaprio and Earl Katz.
Following a doubling in carbon dioxide levels, the surface of the ocean turned acidic over a period of weeks or months and global temperatures rose by 5 degrees centigrade – all in the space of about 13 years.
“We’ve shown unequivocally what happens when CO2 increases dramatically – as it is now, and as it did 55 million years ago,” James Wright said.
The film below goes into more detail regarding the current situation.
New Film: Last Hours
The film “Last Hours” describes a science-based climate scenario where a tipping point to runaway climate change is triggered by massive releases of frozen methane. Methane, a powerful greenhouse gas, has already started to percolate into the open seas and atmosphere from methane hydrate deposits beneath melting arctic ice, from the warming northern-hemisphere tundra, and from worldwide continental-shelf undersea methane pools.
“Last Hours” is narrated by Thom Hartmann and directed by Leila Conners. Executive Producers are George DiCaprio and Earl Katz.
No comments:
Post a Comment
Note: only a member of this blog may post a comment.