Skip to content

Changing Climate in Hawaii Affects Coral Reefs

December 15, 2013
corals and climate

Original artwork by R. Mason

Oceans absorb over 80% of the heat added to the climate system, and about 30% of the CO2 released by humans. When CO2 dissolves in seawater, carbonic acid is created making more acidic oceans. A warmer and more acidic ocean will not be hospitable for coral reefs. Coral organisms are very sensitive to heat stress and expel their colorful symbiotic algae (bleaching) when the water warms. Corals also form their hard skeletons from calcium, an ability compromised as the oceans continue to become more acidic.

Few coral bleaching events were recorded before 1980. Since then many events, including a mass bleaching event in the 1990’s that killed 16% of the planet’s coral, are on record. As oceans continue to warm, bleaching will become more frequent and severe.

By mid-century, temperature and CO2 levels are predicted to increase beyond levels experienced for at least a half-million years. The dual threats of ocean acidification and warming lead some scientists to believe that most of the world’s coral reefs will disappear by the end of the century.

This Week’s MYTH  Buster: “Climate science seems like guesswork.”

The specific effects of climate change are uncertain (eg., how much the temperature will increase). Despite this, it would be far riskier to do nothing. We must move forward with the best tested and most rigourous science we have today.

I Will Make a Difference: by eating locally grown food (reduces food transport).

More on the NPS and climate change

No comments yet

Leave a Reply

Fill in your details below or click an icon to log in:

Gravatar Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


Get every new post delivered to your Inbox.

Join 237,989 other followers

Build a website with
%d bloggers like this: