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使用星光测量温室气体
沃里克大学天文学家与西班牙的机构合作,展示了通常用于研究星星的天文学工具如何重新使用为气候传感器,从而帮助我们跟踪地球大气层在面对全球变暖的情况下如何变化。
来源:英国物理学家网首页沃里克大学天文学家与西班牙的机构合作,展示了通常用于研究星星的天文学工具如何重新使用为气候传感器,从而帮助我们跟踪地球大气层在面对全球变暖的情况下如何变化。
在其前往地球的旅程中,来自恒星的光与含有气体和灰尘区域的颗粒相互作用时会发生变化。当光穿过我们的大气时,这种效果尤其明显,因为大气将线条(例如其自己的“条形码”)引入了恒星(Stellar Spectra)观察到的光模式。
These lines, known as telluric lines, are a nuisance to astronomers, who seek to "decontaminate" their observations by removing these unwanted features, but a new algorithm called Astroclimes, developed at the University of Warwick, aims to harness the absorption lines left by molecules in Earth's atmosphere in stellar spectra to measure the abundance of greenhouse gases (GHGs) at night, such as二氧化碳(CO₂),甲烷(CH₄)和水蒸气(H₂O)。
新算法 吸收线 二氧化碳Marcelo Aron Fetzner Keniger,沃里克奖博士Student in the Astronomy and Astrophysics group at Warwick and developer of the Astroclimes algorithm, said, "Monitoring the abundance of GHGs is necessary to quantify their impact on global warming and climate change. Using telluric lines to measure the abundance of GHGs in Earth's atmosphere has been extensively employed using solar spectra, for example by the COllaborative Carbon Column Observing Network (COCCON). However, since they rely在太阳光谱上,这些测量只能在白天进行,因此星形limes有望通过夜间测量来填补空白。”
碳循环 气候变化