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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Evaluation of the atmospheric lifetime and radiative forcing on climate for 1,2,2,2-Tetrafluoroethyl Trifluoromethyl Ether (CF3OCHFCF3)
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Evaluation of the atmospheric lifetime and radiative forcing on climate for 1,2,2,2-Tetrafluoroethyl Trifluoromethyl Ether (CF3OCHFCF3)

机译：1,2,2,2-四氟乙基三氟甲基醚（CF3OCHFCF3）的大气寿命和辐射强迫对气候的评估

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The compound 1,2,2,2-Tetrafluoroethyl Trifluoromethyl Ether, CF3OCHFCF3 (HFE-227), is currently being considered as a potential replacement for certain halocarbons, particularly for perfluorocarbons (PFCs), as a dry etching gas in the semiconductor industry. For this reason, it is important to determine the potential environmental effects resulting from the use and emissions of this compound. In this paper, the atmospheric lifetime, radiative forcing, and Global Warming Potentials (GWPs), an important measure of the potential effects of a gas on climate, are evaluated for this compound using our zonally averaged chemical transport and radiative transfer models of the atmosphere. To our knowledge, this is the first time this compound has been evaluated with such atmospheric models. In order to calculate the lifetime and radiative forcing, the rate constants and infrared cross sections of this compound were measured in laboratories at Illinois and Purdue, and results are reported here. The model-evaluated atmospheric lifetime is 11.3 years, mainly due to reaction with OH radicals. The model-evaluated instantaneous-clear-sky radiative forcing is 0.38 W m(-2) ppbv(-1), about 45% lower than previously estimated [Imasu et al., 1995]. However, the model-estimated cloudy-sky adjusted forcing, needed to calculated GWPs, is about 25% lower than the model-estimated instantaneous-clear-sky forcing. The GWPs are calculated to be 3400, 1200, and 370 for 20, 100, and 500 year time horizons, respectively. [References: 26]
机译：化合物1,2,2,2-四氟乙基三氟甲基醚CF3OCHFCF3（HFE-227）目前被认为是某些卤代烃，特别是全氟化碳（PFC）的潜在替代品，是半导体工业中的干法蚀刻气体。因此，重要的是确定由该化合物的使用和排放引起的潜在环境影响。在本文中，使用我们的区域平均化学迁移和大气辐射传输模型评估了该化合物的大气寿命，辐射强迫和全球变暖潜势（GWP），这是一种气体对气候潜在影响的重要衡量指标。 。据我们所知，这是首次用这种大气模型对该化合物进行评估。为了计算寿命和辐射强迫，在伊利诺伊州和普渡大学的实验室中测量了该化合物的速率常数和红外截面，并在此处报告了结果。模型评估的大气寿命为11.3年，这主要是由于与OH自由基反应所致。模型评估的瞬时晴空辐射强迫为0.38 W m（-2）ppbv（-1），比先前估计的低约45％[Imasu等，1995]。但是，计算GWP所需的模型估计的多云天空调整强迫比模型估计的瞬时晴朗天空强迫大约低25％。计算得出的20年，100年和500年时间范围的GWP分别为3400、1200和370。 [参考：26]

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