Incandescence-based single-particle method for black carbon quantification in lake sediment cores: Black carbon in lake sediments
Incandescence-based single-particle method for black carbon quantification in lake sediment cores: Black carbon in lake sediments
复制标题
基于白炽光的单粒子方法对湖泊沉积物岩心中的黑碳进行定量：湖泊沉积物中的黑碳
DOI：
10.1002/lom3.10276
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Wennrich, V.
中科院分区：
文献类型：
--
作者：
Chellman, N. J.;McConnell, J. R.;Heyvaert, A.;Vannière, B.;Arienzo, M. M.;Wennrich, V.
难降解黑碳（rBC）是辐射强迫的重要贡献者，因此量化rBC排放和传输对于准确的气候建模至关重要。在化石燃料或生物燃料的不完全燃烧过程中形成，rBC从大型野火和工业来源排放到大气中，可以在全球范围内运输和沉积。冰芯已被用于重建生物质燃烧和工业排放的历史变化，但它们只能从冰川和冰盖中获得，可靠的记录通常仅限于极地地区，长达几个世纪。湖泊沉积物岩心提供了一种可能的替代方案，可以从中低纬度地区开发更长期，广泛分布的记录，尽管与冰芯rBC记录相比，时间分辨率较低，与大气浓度的直接联系较少。在这里，我们提出了一种新的基于白炽度的方法，使用单粒子烟尘光度计测量湖泊沉积物岩心中的rBC。与现有的基于过滤器的技术相比，这种高灵敏度的方法需要的样本量要小得多，从而可以获得过去rBC沉积的可重复的、相对高时间分辨率的记录。
Refractory black carbon (rBC) is an important contributor to radiative forcing, so quantifying rBC emissions and transport is critical for accurate climate modeling. Formed during incomplete combustion of fossil fuels or biofuels, rBC is emitted to the atmosphere from large wildfires and industrial sources where it can be transported and deposited globally. Ice cores have been used to reconstruct historical changes in biomass burning and industrial emissions but they are available only from glaciers and ice sheets, with reliable records longer than a few centuries generally limited to polar regions. Lake sediment cores provide a possible alternative to develop longer term, widely distributed records from mid‐ and low‐latitude regions, albeit with lower temporal resolution and less directly linked to atmospheric concentrations than ice‐core rBC records. Here, we present a new incandescence‐based method for measuring rBC in lake sediment cores using the Single‐Particle Soot Photometer. Compared to existing filter‐based techniques, this highly sensitive method requires a much smaller sample size, resulting in reproducible, relatively high‐temporal‐resolution records of past rBC deposition.