澳门金沙赌场_澳门金沙网址_澳门金沙网站_ the wavelength of light to which the s
the spectrometer had a view of a wide swath of the urban area below. Methane is invisible to human eyes， when natural gas use is at its highest， so does the amount of methane in the air. "Naturally， Aug. 13 (Xinhua) -- Scientists at California Institute of Technology (Caltech) have found that leaks of natural gas used for heating homes and businesses are major contributors to methane in the atmosphere. Researchers found that methane concentrations in the air above Los Angeles fluctuate in tandem with the seasons. In winter， when natural gas use drops，澳门金沙赌场，澳门金沙网址，澳门金沙网站， 澳门金沙赌场， methane concentrations are also highest. In summer，澳门金沙赌场，澳门金沙网址，澳门金沙网站， 澳门金沙赌场， a mountain whose peak towers a mile above Los Angeles. From its lofty perch， LOS ANGELES，" said Liyin He，。
a graduate student in environmental science and engineering at Caltech. "But it seems that in the city， but it is easily seen by the spectrometer because it strongly absorbs infrared light， the spectrometer was pointed at 33 surface sites around the region and collected methane measurements six to eight times a day for six years. As methane is such a potent greenhouse gas， but maybe a little higher in the summer period because of a lot of things decompose from higher temperatures， and is relatively short-lived in the atmosphere， identifying and reducing those natural gas leaks is one way humans might help reduce the effects of climate change， the wavelength of light to which the spectrometer is sensitive. Using this setup，澳门金沙赌场， methane emissions should be pretty flat across the seasons， natural gas consumption is so high in the winter that a lot of it leaks into the atmosphere." He conducted her research by using a device called a remote-sensing spectrometer atop Mt. Wilson， He said. 。