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冰川冻土 ›› 2020, Vol. 42 ›› Issue (4): 1384-1390.doi: 10.7522/j.issn.1000-0240.2018.0308

• 冰冻圈技术 • 上一篇    下一篇

单颗粒黑碳光度计在青藏高原雪冰样品分析中的应用

高少鹏1,2(), 徐柏青1, 王茉1, 李久乐1, 刘大锰2, 赵德龙3   

  1. 1.中国科学院 青藏高原环境变化与地表过程重点实验室,北京 100101
    2.中国地质大学(北京) 能源学院,北京 100083
    3.北京市人工影响天气办公室,北京 100089
  • 收稿日期:2018-04-04 修回日期:2019-06-14 出版日期:2020-12-31 发布日期:2021-01-21
  • 作者简介:高少鹏(1981 - ), 男, 山东莱阳人, 高级工程师, 2016年在中国地质大学(北京)获博士学位, 从事环境分析化学研究. E-mail: gaoshaopeng@itpcas.ac.cn.
  • 基金资助:
    国家自然科学基金项目(41977397);中国科学院仪器设备功能开发技术创新项目资助

Measuring black carbon in snow and ice in the Tibetan Plateau by single particle soot photometer

Shaopeng GAO1,2(), Baiqing XU1, Mo WANG1, Jiule LI1, Dameng LIU2, Delong ZHAO3   

  1. 1.Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Chinese Academy of Sciences, Beijing 100101, China
    2.School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China
    3.Beijing Weather Modification Office, Beijing 100089, China
  • Received:2018-04-04 Revised:2019-06-14 Online:2020-12-31 Published:2021-01-21

摘要:

大气中的黑碳主要由化石燃料以及生物质燃料不完全燃烧产生, 经由传输以及沉降等过程, 可到达并沉积于偏远地区的雪冰表面。相对于洁净的雪表, 较暗的黑碳可吸收更多的太阳辐射, 导致雪表反照率降低, 加速冰雪消融, 进而对区域气候环境产生重要影响。青藏高原的环境脆弱而敏感, 是全球气候变化的驱动机与放大器。根据青藏高原山地冰川雪冰样品矿物杂质多、 浓度变化大的特点, 优化了雪冰单颗粒黑碳光度计(Single Particle Soot Photometer, SP2)分析方法, 制定了规范详细的实验步骤, 评估了样品储存和分样、 进样方式、 样品稀释等过程对测量结果的影响, 并用该方法对研究区域的季节积雪及雪坑样品进行检测。结果表明: 青藏高原雪冰中黑碳浓度在0.21~47.96 ng·mL-1之间, 平均值6.69 ng·mL-1。测样过程中连续测定胶体石墨标样, 校正后的回收率在75%以上。因此, 优化的SP2方法能够获得青藏高原雪冰中准确可靠的黑碳含量信息, 对利用雪冰介质重建黑碳的历史变化过程, 进而准确评估其对气候环境的影响程度, 具有重要意义。

关键词: 黑碳, 雪冰, 单颗粒黑碳光度计, 分析方法

Abstract:

Black carbon (BC) in the atmosphere is mainly produced by incomplete combustion of fossil fuels and biomass fuels. It can reach and deposit on the surface of snow and ice in remote areas through transmission and deposition processes. Compared with clean snow surface, darker BC can absorb more solar radiation, resulting in lower snow surface albedo, accelerating snow and ice melting, and thus has a great influence on regional climate and environment. The environment of Tibetan Plateau (TP) is fragile and sensitive. It is the driver and amplifier of global climate change. There are many mineral impurities in the snow and ice samples from the TP, and the concentration of BC varies a lot. According to the characteristics of such sample, a new BC analysis method based on SP2 was established, detailed experimental procedures were developed and the ways of storage, sampling method and influence of sample dilution were evaluated. The results showed that the BC concentration in the snow and ice of TP ranged from 0.21 ng·mL-1 to 47.96 ng·mL-1, with an average value of 6.69 ng·mL-1. The aquadag was continuously measured during the testing process, and the revised online recovery was higher than 75%. Therefore, it is of great significance to obtain accurate and reliable BC content information in snow and ice of TP to reconstruct the historical trend of BC, and then to accurately assess its impact on the climate and environment.

Key words: black carbon, snow and ice, single particle soot photometer, analysis method

中图分类号: 

  • P343.6