Study Suggest: Oceans Started Warming 135 Years Ago......

[Mister D]

The Koch brothers created huge space heaters under the world's oceans. It's all part of their war on the oceans.

[waltky]

Ocean oxygen levels decreasing...

Scientists: Oceans Rapidly Losing Oxygen
May 03, 2016 - Fish need oxygen to breathe as much humans do, and two new reports say there is less and less of it in some of the world's oceans.

According to the U.S. National Center for Atmospheric Research as changes in winds and temperature caused by global warming lead to warmer surface water temperatures, the oceans are absorbing less oxygen.

A man walks along the Indian Ocean as the tide goes out at Coco Beach in Dar es Salaam, Tanzania

There are already a number of areas -- so called dead zones -- where fish don't have enough oxygen to live and either die or swim to safety. Cold water absorbs and holds more oxygen than warm water, so as the water continues to warm the report predicts nature’s ability to replenish the loss may become overwhelmed by early 2030s.

Deoxgenation due to climate change is already detectable in some parts of the ocean. New research from NCAR finds that it will likely become widespread between 2030 and 2040. Other parts of the ocean, shown in gray, will not have detectable loss of oxygen due to climate change even by 2100.

In its latest study, published in the journal Global Biogeochemical Cycles, the Center says deoxygenation can already be seen in some parts of the Pacific Ocean. Scientists warn even if we curb the present level of CO2 emissions, the damage to marine ecosystems may already have been made irreversible.

http://www.voanews.com/content/scien...n/3313942.html

See also:

Can Artificial Mountain Change Microclimate?
May 03, 2016 - Most scientists believe than our planet is getting hotter and drier and that the trend will be hard to reverse, especially in flat regions such as the Arabian Peninsula.

Among other reasons these regions do not have much rainfall is a lack of so-called updraft — vertical movement of the moist air that occurs when horizontal winds hit a mountainside.

So one Persian Gulf nation, the United Arab Emirates, is seriously considering building a mountain to try to change its climate. While it does not have experience in mountain-building, the UAE has successfully built an artificial lake — Lake Zakher, in the desert near the border with Oman.

The sun sets in the Rub' al-Khali desert, which encompasses most of the southern third of the Arabian Peninsula. One reason that such regions are so dry is that they lack vertical movement of moist air.

Scientists from the U.S.-based University Corporation for Atmospheric Research say they are now studying local climatology to determine the best location for and dimensions of the proposed mountain.

If the project materializes, moist air from the Gulf could climb up the mountainside and cool, while seeding the clouds from aircraft with eco-friendly chemicals would help create much needed rain, changing the local climate.

http://www.voanews.com/content/artif...e/3313958.html

[waltky]

Failure to rein in global temperature rises could cause the marine food web to collapse...


Scientists: Warming Oceans Could Scupper Marine Food System
January 09, 2018 — Failure to rein in global temperature rises could cause the marine food web to collapse, devastating the livelihoods of tens of millions of people who rely on fisheries for food and income, scientists have warned.

Warming oceans restrict vital energy flows between different species in the marine ecosystem, reducing the amount of food available for bigger animals — mostly fish — at the top of the marine food web, according to a study in the journal PLOS Biology published Tuesday. This could have "serious implications" for fish stocks, said Ivan Nagelkerken, a professor of marine ecology at Australia's University of Adelaide and one of the study's authors. Globally, about 56.5 million people were engaged in fisheries and aquaculture in 2015, according to the latest data from the United Nations' Food and Agriculture Organization (FAO). In addition, almost a fifth of animal protein consumed by 3.2 billion people in 2015 comes from fish, FAO said.

Fishermen unload fish at a jetty in Samut Sakhon province, Thailand, March 11, 2016. In a study published Jan. 9, 2018, scientists warn that increases in global temperatures could devastate the marine food web and lead to "serious implications" for fish stocks.

The Adelaide scientists set up 12 large tanks, each holding 1,800 liters of water, in a temperature-controlled room to replicate complex marine food webs, and test the effects of ocean acidification and warming over six months. Plant productivity increased under warmer temperatures but this was mainly due to an expansion of bacteria which fish do not eat, Nagelkerken said in a phone interview. The findings show that the 2015 Paris agreement on curbing global warming must be met "to safeguard our oceans from collapse, loss of biodiversity and less fishery productivity." Under the landmark agreement, world leaders agreed to limit the rise in average global temperatures to 1.5 to 2 degrees Celsius above pre-industrial times.


The United Nations, however, has warned the world is heading toward a 3-degree increase by 2100. Recent studies have sounded alarm bells for oceans and its inhabitants as the Earth continues to experience record-breaking heat. A Jan. 4 paper published in the journal Science said "dead zones" — where oxygen is too low to support most marine life — more than quadrupled in the past 50 years due to human activities. Another said high ocean temperatures are harming tropical corals, which are nurseries for fish, almost five times more often than in the 1980s.


https://www.voanews.com/a/warming-oc...y/4200654.html