Aerosols supply bioaccessible iron to marine biota which could affect climate through biogeochemical feedbacks. This paper review progresses in research on pyrogenic aerosol iron. Observations and laboratory experiments indicate that the iron solubility of pyrogenic aerosol can be considerably higher than lithogenic aerosol. Aerosol models highlight a significant contribution of pyrogenic aerosols (~20%) to the atmospheric supply of dissolved iron into the ocean. Some ocean models suggest a higher efficiency of pyrogenic iron in enhancing marine productivity than lithogenic sources. It is, however, challenging to quantitatively estimate its impact on the marine biogeochemical cycles under the changing air quality and climate.

气溶胶为海洋生物提供了可生物利用的铁，这可能会通过生物地球化学反馈影响气候。本文综述了热解气溶胶铁的研究进展。观测结果和实验室实验表明，热解气溶胶的铁溶解度可能大大高于成岩气溶胶。气溶胶模型强调了热解气溶胶（〜20％）对大气中溶解铁进入海洋的重要贡献。一些海洋模型表明，生铁在提高海洋生产力方面的效率要高于生石源。然而，在不断变化的空气质量和气候下，定量评估其对海洋生物地球化学循环的影响是具有挑战性的。