Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere-猫眼课题宝

DOI：

10.1126/science.adh2526

发表时间：

2023-12

期刊：

Science

影响因子：

56.9

通讯作者：

中科院分区：

综合性期刊1区

文献类型：

作者：

Xucheng He;M. Simon;Siddharth Iyer;Hong-Bin Xie;B. Rörup;Jiali Shen;Henning Finkenzeller;D. Stolzenburg;Rongjie Zhang;A. Baccarini;Y. J. Tham;Mingyi Wang;Stavros Amanatidis;A. A. Piedehierro-A.;A. Amorim;Rima Baalbaki;Zoé Brasseur;L. Caudillo;Biwu Chu;L. Dada;J. Duplissy;I. El Haddad;R. Flagan;Manuel Granzin;A. Hansel;M. Heinritzi;V. Hofbauer;T. Jokinen;D. Kemppainen;W. Kong;J. Krechmer;A. Kürten;Houssni Lamkaddam;Brandon Lopez;Fangfang Ma;Naser G. A. Mahfouz;Vladimir Makhmutov;Hanna E. Manninen;Guillaume Marie;R. Marten;Dario Massabò;R. Mauldin;B. Mentler;A. Onnela;T. Petäjä;Joschka Pfeifer;M. Philippov;A. Ranjithkumar;M. Rissanen;S. Schobesberger;W. Scholz;Benjamin Schulze;Mihnea Surdu;R. Thakur;A. Tomé;A. Wagner;Dongyu S. Wang;Yonghong Wang;Stefan K. Weber;A. Welti;P. Winkler;Marcel Zauner-Wieczorek;U. Baltensperger;J. Curtius;T. Kurtén;D. Worsnop;R. Volkamer;K. Lehtipalo;J. Kirkby;Neil M. Donahue;M. Sipilä;M. Kulmala

大气中的主要成核蒸气被认为是由氨 (NH3) 稳定的硫酸 (H2SO4)。然而，在海洋和极地地区，NH3普遍较低，并且H2SO4经常与碘含氧酸[HIOx，即碘酸(HIO3)和亚碘酸(HIO2)]一起发现。在使用 CERN CLOUD（宇宙留下室外液滴）室进行的实验中，我们研究了 H2SO4 和 HIOx 在大气粒子成核过程中的相互作用。我们发现 HIOx 通过两种不同的相互作用极大地增强了 H2SO4(-NH3) 成核。首先，HIO3 与带电簇中的 H2SO4 强烈结合，因此它们协同驱动粒子成核。其次，HIO2 取代 NH3，在分子簇中形成牢固结合的 H2SO4-HIO2 酸碱对。全球观察表明，HIOx 使海洋和极地地区的 H2SO4(-NH3) 成核速率提高了 10 至 10,000 倍。编辑摘要在海洋上方的空气中，新的颗粒是如何形成的，而氨是这一过程中的一个重要物种，但其含量并不丰富？他等人。报告称，海洋环境中丰富的碘含氧酸可以大大增加原始海洋和极地地区常见的低氨条件下新颗粒形成的速度。这种效应在低层海洋层积云中尤其重要，它将大部分入射太阳辐射反射回太空，并对全球辐射平衡和气候产生重要影响。 ——H. Jesse Smith 碘含氧酸可以极大地提高原始海洋和极地大气中新颗粒的形成率。

The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H2SO4), stabilized by ammonia (NH3). However, in marine and polar regions, NH3 is generally low, and H2SO4 is frequently found together with iodine oxoacids [HIOx, i.e., iodic acid (HIO3) and iodous acid (HIO2)]. In experiments performed with the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber, we investigated the interplay of H2SO4 and HIOx during atmospheric particle nucleation. We found that HIOx greatly enhances H2SO4(-NH3) nucleation through two different interactions. First, HIO3 strongly binds with H2SO4 in charged clusters so they drive particle nucleation synergistically. Second, HIO2 substitutes for NH3, forming strongly bound H2SO4-HIO2 acid-base pairs in molecular clusters. Global observations imply that HIOx is enhancing H2SO4(-NH3) nucleation rates 10- to 10,000-fold in marine and polar regions. Editor’s summary How are new particles formed in the air above the oceans, where ammonia, an important species in the process, is not very abundant? He et al. report that iodine oxoacids, which are plentiful in marine environments, can substantially increase the rate of new particle formation in the low-ammonia conditions commonly found in pristine marine and polar regions. This effect could be particularly important in low-level marine stratocumulus clouds, which reflect a large fraction of incident solar radiation back into space and have an important influence on global radiation balance and climate. —H. Jesse Smith Iodine oxoacids can greatly enhance rates of new particle formation in pristine marine and polar atmospheres.

Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere

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