Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Environment & Energy
Related: About this forumGlobal Ocean De-Oxygenation Quantified
http://www.geomar.de/index.php?id=4&no_cache=1&tx_ttnews%5btt_news%5d=4997&tx_ttnews%5bbackPid%5d=185&L=1[font face=Serif]15.02.2017
[font size=5]Global Ocean De-Oxygenation Quantified[/font]
[font size=4]The first in-depth study on the observed global ocean oxygen content was just published by Kiel scientists in Nature.
15 February 2017 / Kiel. The ongoing global change causes rising ocean temperatures and changes the ocean circulation. Therefore less oxygen is dissolved in surface waters and less oxygen is transported into the deep sea. This reduction of oceanic oxygen supply has major consequences for the organisms in the ocean. In the international journal Nature, oceanographers of GEOMAR Helmholtz Centre for Ocean Research Kiel have now published the most comprehensive analysis on oxygen loss in the world's oceans and their cause so far.[/font]
[font size=3]Oxygen is an essential necessity of life on land. The same applies for almost all organisms in the ocean. However, the oxygen supply in the oceans is threatened by global warming in two ways: Warmer surface waters take up less oxygen than colder waters. In addition, warmer water stabilizes the stratification of the ocean. This weakens the circulation connecting the surface with the deep ocean and less oxygen is transported into the deep sea. Therefore, many models predict a decrease in global oceanic oxygen inventory of the oceans due to global warming. The first global evaluation of millions of oxygen measurements seems to confirm this trend and points to first impacts of global change.
In the renowned scientific journal Nature the oceanographers Dr. Sunke Schmidtko, Dr. Lothar Stramma and Prof. Dr. Martin Visbeck from GEOMAR Helmholtz Centre for Ocean Research Kiel just published the most comprehensive study on global oxygen content in the world's oceans so far. It demonstrates that the oceans oxygen content has decreased by more than two percent over the last 50 years. Since large fishes in particular avoid or do not survive in areas with low oxygen content, these changes can have far-reaching biological consequences, says Dr. Schmidtko, the lead-author of the study.
The study also shows that, with the exception of a few regions, the oxygen content decreased throughout the entire ocean during the period investigated. The greatest loss was found in the North Pacific. While the slight decrease of oxygen in the atmosphere is currently considered non-critical, the oxygen losses in the ocean can have far-reaching consequences because of the uneven distribution. For fisheries and coastal economies this process may have detrimental consequences, emphasizes the co-author Dr. Lothar Stramma.
[/font][/font]
http://dx.doi.org/10.1038/nature21399[font size=5]Global Ocean De-Oxygenation Quantified[/font]
[font size=4]The first in-depth study on the observed global ocean oxygen content was just published by Kiel scientists in Nature.
15 February 2017 / Kiel. The ongoing global change causes rising ocean temperatures and changes the ocean circulation. Therefore less oxygen is dissolved in surface waters and less oxygen is transported into the deep sea. This reduction of oceanic oxygen supply has major consequences for the organisms in the ocean. In the international journal Nature, oceanographers of GEOMAR Helmholtz Centre for Ocean Research Kiel have now published the most comprehensive analysis on oxygen loss in the world's oceans and their cause so far.[/font]
[font size=3]Oxygen is an essential necessity of life on land. The same applies for almost all organisms in the ocean. However, the oxygen supply in the oceans is threatened by global warming in two ways: Warmer surface waters take up less oxygen than colder waters. In addition, warmer water stabilizes the stratification of the ocean. This weakens the circulation connecting the surface with the deep ocean and less oxygen is transported into the deep sea. Therefore, many models predict a decrease in global oceanic oxygen inventory of the oceans due to global warming. The first global evaluation of millions of oxygen measurements seems to confirm this trend and points to first impacts of global change.
In the renowned scientific journal Nature the oceanographers Dr. Sunke Schmidtko, Dr. Lothar Stramma and Prof. Dr. Martin Visbeck from GEOMAR Helmholtz Centre for Ocean Research Kiel just published the most comprehensive study on global oxygen content in the world's oceans so far. It demonstrates that the oceans oxygen content has decreased by more than two percent over the last 50 years. Since large fishes in particular avoid or do not survive in areas with low oxygen content, these changes can have far-reaching biological consequences, says Dr. Schmidtko, the lead-author of the study.
The study also shows that, with the exception of a few regions, the oxygen content decreased throughout the entire ocean during the period investigated. The greatest loss was found in the North Pacific. While the slight decrease of oxygen in the atmosphere is currently considered non-critical, the oxygen losses in the ocean can have far-reaching consequences because of the uneven distribution. For fisheries and coastal economies this process may have detrimental consequences, emphasizes the co-author Dr. Lothar Stramma.
[/font][/font]
InfoView thread info, including edit history
TrashPut this thread in your Trash Can (My DU » Trash Can)
BookmarkAdd this thread to your Bookmarks (My DU » Bookmarks)
3 replies, 1017 views
ShareGet links to this post and/or share on social media
AlertAlert this post for a rule violation
PowersThere are no powers you can use on this post
EditCannot edit other people's posts
ReplyReply to this post
EditCannot edit other people's posts
Rec (6)
ReplyReply to this post
3 replies
= new reply since forum marked as read
Highlight:
NoneDon't highlight anything
5 newestHighlight 5 most recent replies
Global Ocean De-Oxygenation Quantified (Original Post)
OKIsItJustMe
Feb 2017
OP
dhill926
(16,234 posts)1. wow...this is really not good....
msongs
(67,199 posts)2. thus the explosion in jellyfish population - they thrive and their predators die nt
NickB79
(19,114 posts)3. Once again, another parallel with the Permian Great Dying Event
http://news.stanford.edu/news/2011/march/permian-mass-extinction-032411.html
Dr. Canfield, your Ocean is ready. Paging Dr. Canfield please.......
Algae and bacteria hogged oxygen after ancient mass extinction, slowing recovery of marine life, say Stanford researchers
After the biggest mass extinction in Earth's history 250 million years ago algae and bacteria in the ocean rebounded so fast that they consumed virtually all the oxygen in the sea, slowing the recovery of the rest of marine animals for several million years.
After the biggest mass extinction in Earth's history 250 million years ago algae and bacteria in the ocean rebounded so fast that they consumed virtually all the oxygen in the sea, slowing the recovery of the rest of marine animals for several million years.
Dr. Canfield, your Ocean is ready. Paging Dr. Canfield please.......