Black carbon (BC), brown carbon, and light‐absorbing iron oxides (FeO_x ) aerosols affect Earth's energy budget through their strong absorption of solar radiation. FeO_x aerosols can also affect global biogeochemical cycles through their role as a nutrient for oceanic phytoplankton. However, observational data for these aerosols required for evaluating their effects using global models are scarce, especially for FeO_x . Here, we summarize and compare the data sets of BC and FeO_x from five ground‐based and three aircraft observation campaigns conducted in the East Asian and Arctic regions during the 2009–2018 period acquired using a modified single‐particle soot photometer. In these campaigns, >80% of FeO_x ‐containing aerosols in the 170–270 nm FeO_x core size range had microphysical features indicating an anthropogenic origin. The particle size distribution for each of the BC and FeO_x was similar in all of the data sets except for those dominated by fresh urban pollution or pristine Arctic air. The campaign‐averaged mass concentrations of FeO_x and BC were ~60–360 ng/m³ and ~240–1,300 ng/m³, respectively, in East Asia, and ~6 ng/m³ and ~20–30 ng/m³, respectively, in the Arctic. The campaign‐averaged FeO_x /BC mass concentration ratio varied within a narrow range of 0.2–0.6 in both East Asian and Arctic regions. In every campaign, FeO_x , BC, and carbon monoxide were tightly correlated with each other with similar slope to the urban campaigns (around Tokyo), implying the spatiotemporal variation of anthropogenic FeO_x emission around northern middle‐to‐high latitudes is similar to those of anthropogenic BC and CO emissions.

中文翻译：

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东亚和北极地区吸光性氧化铁和黑碳气溶胶的丰度和微物理性质

黑碳（BC），褐碳和吸收光的氧化铁（FeO _x）气溶胶会强烈吸收太阳辐射，从而影响地球的能源收支。FeO _x气溶胶作为海洋浮游植物的养分，也可以影响全球生物地球化学循环。但是，使用整体模型评估其效果所需的这些气溶胶的观测数据很少，尤其是对于FeO _x。在这里，我们总结并比较了使用改良的单颗粒煤烟光度计在2009-2018年期间在东亚和北极地区进行的五次地面观测和三架飞机观测活动中的BC和FeO _x数据集。在这些活动中，FeO _x的> 80％170-270 nm FeO _x核心尺寸范围内的含气溶胶具有微物理特征，表明是人为起源。在所有数据集中，BC和FeO _x的粒径分布均相似，除了那些以新鲜的城市污染或原始北极空气为主的数据。的FeO的运动平均的质量浓度_X和BC为〜60-360纳克/米³和〜240-1,300纳克/米³，分别在东亚，和〜6纳克/米³和〜20-30纳克/ m ³，分别在北极。广告活动平均FeO _x在东亚和北极地区，/ BC质量浓度比在0.2-0.6的窄范围内变化。在每个运动中，FeO _x，BC和一氧化碳彼此紧密相关，并且具有与城市运动（东京附近）相似的斜率，这意味着人为的FeO _x排放的时空变化与北高中纬度相似。人为造成的BC和CO排放。