Las emisiones de carbono, visualizadas de forma impactante y fácil de entender
Blog microsiervos
En Carbon Visuals se dedican a crear visualizaciones informáticas sobre el impacto de las emisiones de CO2 a la atmósfera. Una de ellas es esta impactante visualización de las emisiones en Nueva York con unas gigantescas esferas que simbolizan el CO2. En total, unas dos toneladas por segundo o 54.349.650 esferas al año - de una tonelada cada una.
In 2010 New York City added 54 million metric tons of carbon dioxide to the atmosphere (75% from buildings, the bulk of the rest from transport) but that number means little to most people because few of us have a sense of scale for atmospheric pollution.
Carbon Visuals, supported by Environmental Defense Fund, have created a film that makes those emissions feel more real - the total emissions and the rate of emission. Designed to engage the ‘person on the street’, this version is exploratory and still work in progress.
Emissions in 2010 were 12% less than 2005 emissions. The City of New York is on track to reduce emissions by 30% by 2017 - an ambitious target. Mayor Bloomberg’s office has not been involved in the creation or dissemination of this video.
See how we can help cities engage their citizens in carbon issues.
Street-level view of 10 metre (33 ft) spheres of carbon dioxide gas emerging at a rate of one every 0.58 seconds
For the technically minded:
In 2010 (the latest year for which data is available) New York City added 54,349,650 metric tons of carbon dioxide to the atmosphere = 148,903 tons a day = 6,204 tons an hour = 1.72 tons a second.
City of New York, Inventory of New York City Greenhouse Gas Emissions, September 2011, by Jonathan Dickinson and Andrea Tenorio. Mayor’s Office of Long-Term Planning and Sustainability, New York, 2011
At standard pressure and 59 °F a metric ton of carbon dioxide gas would fill a sphere 33 feet across (density of CO₂ = 1.87 kg/m³).
If this is how carbon dioxide gas was actually emitted in New York we would see one of these spheres appear every 0.58 seconds.
10 metre (33 ft) spheres of carbon dioxide gas emerge at a rate of one every 0.58 seconds
This is how the size of the piles was calculated:
CO2 volume for a year: 29,063,983,957 metres cubed (= cube with sides 3,075 metres) CO2 volume for a day: 79,627,353 metres cubed (= cube with sides 430 metres)
Packing density for unordered spheres: 0.64
Spheres volume for a year: 45,412,474,933 metres cubed (= cube with sides 3,568 metres) Spheres volume for a day: 124,417,739 metres cubed (= cube with sides 499 metres)
A 'pile' is somewhere between a hemisphere and a cone that has equal radius and height. So the height will be somewhere between the height of a hemisphere and height of a cone which each have the spheres volume:
Height of annual hemisphere: 2,789 metres; height of annual cone: 3,513 metres Height of daily hemisphere: 390 metres; height of daily cone: 492 metres.
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