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在欧亚北极的冰核粒子的陆地和海洋来源

Guangyu Li¹, André Welti², Arianna Rocchi³

¹Institute for Atmospheric and Climate Science, ETH Zurich, Switzerland. lgy526462219@gmail.com.

Faraday discussions

|February 25, 2025

概括

生态冰核粒子 (INP) 是北极云形成的关键. 测量结果显示,这些易热的INP在北极空气和雾中大量存在,气溶化机制影响了它们在大气中的存在.

科学领域:

大气化学大气化学
云物理云物理
北极海洋学北极海洋学

背景情况:

冰核粒子 (INP) 对于北极云层的冰形成至关重要,影响云层的持久性和辐射特性.
关于北冰洋偏远地区,特别是欧亚北极地区的INP丰富度和来源的数据有限.
了解INP对于准确的北极地区气候建模至关重要.

研究的目的:

测量INP度在海水,雾水和空气在夏季在北冰洋.
确定欧亚北极地区INP的来源和特征.
研究气溶化机制在将INP分离到大气中的作用.

主要方法:

在"北极世纪探险" (2021年8月至9月) 期间,基于船舶的测量.
在海水,雾水和环境空气中分析INP度.
对环境气溶进行热敏性测试,以区分INP类型.
在船上的海喷气喷雾气溶气泡发生器实验模拟气溶化.

主要成果:

易受热的生物源性INP在北极INP群体中占主导地位,温度在-20°C以上,温度在-25°C以下.
雾水中的INP度与环境空气中的度相似.
气溶液INP与环境INP度相关,但与海水INP丰富度没有直接关联.
气泡实验显示,INP度与水酸盐和光正相关,这表明生物效应的影响.

结论:

生物源的INP是夏季研究的北极地区冰核形成的主要原因.
海洋气溶的过程,而不是海水INP的大量度,对于大气INP负载至关重要.
需要对气溶化机制进行进一步的研究,以充分了解INP在北极大气中的运输和影响.

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