econintersect.com
       
  

FREE NEWSLETTER: Econintersect sends a nightly newsletter highlighting news events of the day, and providing a summary of new articles posted on the website. Econintersect will not sell or pass your email address to others per our privacy policy. You can cancel this subscription at any time by selecting the unsubscribing link in the footer of each email.



posted on 17 November 2015

Ocean Acidification: The Forgotten Piece Of The Carbon Puzzle

from The Conversation

-- this post authored by Ellycia Harrould-Kolieb, University of Melbourne

Ocean acidification - the rise in ocean acidity due to the increased absorption of carbon dioxide (CO₂) - is often thought of as consequence of climate change. However, it is actually a separate, albeit very closely-related problem.

Ocean acidification is often referred to as "the other CO₂ problem" because, like climate change, it is primarily a result of the increased emissions of this gas. Despite their common driver, though, the processes and impacts of ocean acidification and climate change are distinct. It should not be assumed that policies intended to deal with the climate will simultaneously benefit the oceans.

The current emphasis of global climate policies on a warming target is a case in point.

A narrow focus on temperature stabilisation, for example, opens the door for policy interventions that prioritise the reduction of greenhouse gases other than carbon dioxide. This is because non-CO₂ greenhouse gases - like methane and nitrous oxide, which can arise from agricultural and industrial processes - typically have a higher global warming potential and might even be less costly than CO₂ to reduce.

In addition, several geoengineering schemes have been proposed to reduce the impacts of a warming climate. Yet such schemes often do nothing to address emissions, and may even exacerbate carbon absorption in the oceans.

Reducing CO₂ - the only long-term solution

The most important step in addressing both climate change and ocean acidification, and ultimately the only way to avoid the most serious impacts of both, is the reduction of carbon dioxide emissions.

Long-term policy targets designed to guide emission reductions to a level that would avoid unacceptable consequences should consider both ocean acidification and climate change. Interestingly, it is in doing this that we see the solutions to these two global issues converge.

Countries have largely agreed that there is a desire to limit global temperature increases to no more than 2℃ above pre-industrial temperatures. This is a desire that requires us to drastically reduce our carbon dioxide emissions. Indeed, the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report found that for a 66% chance of remaining below 2℃ we can emit less than 1,010 billion tonnes of carbon dioxide, or about one-third of our carbon budget.

In fact, such a target is in line with the most ambitious atmospheric carbon concentration scenario (called RCP2.6) used by the IPCC to model climate impacts.

A recent study in the journal Science conducted by J.P. Gattuso and colleagues modelled this same IPCC scenario and found that exceeding it would have wide-ranging consequences for marine life, marine ecosystems, and the goods and services they supply to humanity. However, as with climate change, many of the worst impacts of rising acidity could be avoided by following or remaining below this trajectory.

The most critical feature of this scenario with regards to ocean acidification is a reduction of carbon dioxide to net zero emissions by no later than 2070.

But, as Gattuso's team importantly note, even achieving zero emissions within this timeframe would not prevent substantial ocean acidification. Coral reefs and shellfish populations will remain especially vulnerable.

This is true for climate change impacts as well. And it is the reason that many, particularly those living in developing and low-lying island states, wish to see the long-term goal for global temperature rise reduced to 1.5℃.

In effect, this means that reducing net carbon dioxide emissions to zero must happen even sooner than 2070. Ocean acidification, therefore, provides the impetus for additional urgency in agreeing to stringent timeframes for reducing CO₂ emissions.

Net zero emissions on the table at Paris?

We are fast approaching the next round of climate talks on the UN Framework Convention on Climate Change in Paris. If we are to see any meaningful global climate pact emerge, ocean acidification must sit firmly alongside climate change on the negotiation table.

Given the double threat that ocean acidification and climate change poses to some of the most vital goods and services underpinning human welfare, including food security, economic development, and the viability of ecosystems, it is crucial that world leaders set sharp emission reductions square in their sights.

Promisingly, up for negotiation in Paris is language that could see parties agreeing to net zero emissions. This would indeed be a very welcome, and ultimately necessary, development.

The ConversationEllycia Harrould-Kolieb, PhD Candidate, School of Geography & Australian-German Climate and Energy College, University of Melbourne

This article was originally published on The Conversation. Read the original article.

>>>>> Scroll down to view and make comments <<<<<<

Click here for Historical News Post Listing










Make a Comment

Econintersect wants your comments, data and opinion on the articles posted.  As the internet is a "war zone" of trolls, hackers and spammers - Econintersect must balance its defences against ease of commenting.  We have joined with Livefyre to manage our comment streams.

To comment, using Livefyre just click the "Sign In" button at the top-left corner of the comment box below. You can create a commenting account using your favorite social network such as Twitter, Facebook, Google+, LinkedIn or Open ID - or open a Livefyre account using your email address.



You can also comment using Facebook directly using he comment block below.





Econintersect Contributors


search_box

Print this page or create a PDF file of this page
Print Friendly and PDF


The growing use of ad blocking software is creating a shortfall in covering our fixed expenses. Please consider a donation to Econintersect to allow continuing output of quality and balanced financial and economic news and analysis.


Take a look at what is going on inside of Econintersect.com
Main Home
Analysis Blog
Democratic Development Lowers the Cost of Credit
Is Growing Household Debt An Economic Counter-Dynamic?
News Blog
What We Read Today 26 February 2017
INAUGURATION DAY: A Bad Lip Reading Of Donald Trump's Inauguration
Did The Dodd-Frank Act Make The Financial System Safer?
A Close Look At The Decline Of Homeownership - Part Five Of Five
Do Institutional Investors Chase Returns?
Infographic Of The Day: How To Survive A Deadly Snake Bite
Early Headlines: Global Mfg 1970-2010, No Refugee Spike, GOP Health Proposal Leak, GOP Town Halls, Trump's Debt Decrease, Macron Gains, China's $9 Trn Moral Hazard, Americans Oppose Wall And More
Premium Seats At Premium Events Equal Premium Prices
Earnings And Economic Reports: Week Starting 27 February 2017
Time Crystals: How Scientists Created A New State Of Matter
Cost Of War Against ISIS Reaches 11 Billion Dollars
What We Read Today 25 February 2017
Candid Camera Classic: Dirty Clean Words
Investing Blog
Snapchat Is In The Money Burning Business
Technical Thoughts: How To Buy The Dips
Opinion Blog
Why Winning The French Presidential Election Could Be A Poisoned Chalice
Unintended Consequences Of Corporate Tax Incentives
Precious Metals Blog
Deflation And Gold: A Contrarian View
Live Markets
24Feb2017 Market Close: Wall Street Rose From Session Lows To Close In The Green Near The Unchanged Line, Short-Term Indicators And Analysts Questioning Continuing Bull Run
Amazon Books & More






.... and keep up with economic news using our dynamic economic newspapers with the largest international coverage on the internet
Asia / Pacific
Europe
Middle East / Africa
Americas
USA Government





























 navigate econintersect.com

Blogs

Analysis Blog
News Blog
Investing Blog
Opinion Blog
Precious Metals Blog
Markets Blog
Video of the Day
Weather

Newspapers

Asia / Pacific
Europe
Middle East / Africa
Americas
USA Government
     

RSS Feeds / Social Media

Combined Econintersect Feed
Google+
Facebook
Twitter
Digg

Free Newsletter

Marketplace - Books & More

Economic Forecast

Content Contribution

Contact

About

  Top Economics Site

Investing.com Contributor TalkMarkets Contributor Finance Blogs Free PageRank Checker Active Search Results Google+

This Web Page by Steven Hansen ---- Copyright 2010 - 2017 Econintersect LLC - all rights reserved