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In 2011-12 it was estimated tourism centred on the Great Barrier Reef generated $5.7bn for the economy and created 69,000 jobs.

Recent experience in Australia had shown that negative commentary about the status of world heritage properties impacted on tourism.”

he twin perils brought by climate change – an increase in the temperature of the ocean and in its acidity – threaten its very existence.”

Coral ecosystems are a source of food for millions; protect coastlines from storms and erosion; provide habitat, spawning and nursery grounds for economically important fish species; provide jobs and income to local economies from fishing, recreation, and tourism; are a source of new medicines, and are hotspots of marine biodiversity. They also are of great cultural importance in many regions around the world, particularly Polynesia.

They are also found along the coasts of over 100 other countries.

one recent estimate gave the total net benefit of the world's coral reef ecosystems to be $29.8 billion/year.

In fact, it’s probably the strongest that’s ever been measured. I

In fact, due to an atmospheric lag, extreme weather will likely keep getting worse for several more months. Though El Niño is typically the most powerful player among the world’s constantly feuding meteorological morphologies, it takes months for its burst of heat to filter around the globe from the tropical Pacific. Ocean temperatures in the El Niño regions of the Pacific usually peak in November or December, but globally-averaged temperatures don’t typically peak until between February and July of the following year.

Though El Niño is the proximate cause of many of this year’s weather records, its effects are an upward wiggle on top of the slow-rolling steamroller of climate change.