NASA’s first geosynchronous satellite.
The build-up of greenhouse gasses in the atmosphere is predicted to have a number of effects here on Earth: record high temperatures, unprecedented droughts, and stronger than normal storms. But the effects may also extend to what’s far, far above us. Hydrogeologist Scott K. Johnson writes at Ars Technica that the “non-intuitive” consequences of climate change will be significant, including, potentially, screwing with the paths of satellites circling the Earth. Here’s how:
World carbon emissions fell by 1.3 percent in 2009, most likely due to the global recession, says a report from the Global Carbon Project published today in Nature Geoscience. Emissions were originally expected to drop further (about 3 percent, as estimated from the expected drop of world GDP), but China and India’s surging economies and increasing carbon output countered the decreases elsewhere.
The largest decreases occurred in Europe, Japan and North America: 6.9% in the United States, 8.6% in the U.K., 7% in Germany, 11.8% in Japan and 8.4% in Russia. The study notes that some emerging economies recorded substantial increases in their total emissions, including 8% in China and 6.2% in India. [USA Today]
There is some good news from the report. It seems the atmospheric CO2 concentrations didn’t jump as much as they were expected to, which means the world’s carbon sinks were performing better.
While emissions did not fall much, the amount of CO2 in the atmosphere increased by just 3.4 gigatonnes – one of the smallest rises in the last decade. Friedlingstein says the land and marine sinks performed better in 2009, because the La Niña conditions in the Pacific meant the tropics were wetter, allowing plants to grow more and store away more carbon. [New Scientist]