A massive doomsday climate clock is being projected in downtown Montreal

Dec 6 2018, 2:28 pm

The giant climate clock projected on the side of a building on Guy Street has reappeared.

The clock warns of a 1.5°C and 2°C increase in global temperatures by the year 2034.

According to the Human Impact Lab, global CO2 emissions continue to increase following the observed trend since 2013.

The clock was developed by Concordia University professor and research chair in climate science, Damon Matthews and Canadian musician David Usher. The clock has been projected onto the side of the building for a few days every year since 2016.

The clock’s numbers focus on global carbon dioxide emissions for 2018, the amount of temperature change caused by human emissions and the remaining carbon budget.

The clock displays the following information:

  • Tonnes of CO2 Emitted
    This value shows the total accumulated CO2 emissions from fossil fuel burning, cement manufacture and land-use change since 1870, based on the most recent data from the Global Carbon Project.
  • Global Warming to Date
    This number represents the human contribution to global temperature increases since 1861-1880. This Global Warming Index represents the portion of observed temperature change that can be attributed to all human drivers of climate change.
  • Time left to 1.5 and 2 °C
    The time remaining until +1.5 and +2 °C date is estimated based on extrapolating the most recent 5-year trend of global annual fossil fuel CO2 emissions and calculating the time until we emit the remaining carbon budget – the total allowable emissions for 1.5 and 2°C.


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Organizers at the Human Impact Lab are urging Quebecers to sign their online petition to reduce emissions. So far, more than 230,000 people have signed.

The Climate Clock will be on display until December 7, from 4:30 pm to 9:30 pm.

The Clock can be downloaded here and embedded to any website as an iframe.

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