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Patagonian Dust as a Source of Macronutrients in the Southwest Atlantic Ocean

机译：巴塔哥尼亚粉尘是西南大西洋中大量营养素的来源

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摘要

The role of Patagonian wind-borne dust as a source of macronutrients to the surface waters of the Southwest Atlantic Ocean was evaluated for the first time. During spring 2016, a series of experiments with dust was conducted to evaluate the dynamics of macronutrient dissolution in seawater. The results showed a differential contribution of macronutrients to seawater depending on the dust source and the amount added. Addition of a conservative amount of Patagonian dust to the seawater contributed nitrate (NO3-) and silicic acid (Si(OH)(4)), but not phosphate (PO43-). Additional dust input to the system resulted in higher macronutrient concentrations. Particles collected from a nearby burned field did not contribute any macronutrients to the seawater. Thus, each dust event may affect biological productivity differently, depending on the source of the particles. Dissolution experiments suggest that macronutrients from dust arc available immediately after particle deposition on the sea surface. The study includes field measurements of macronutrient concentrations before and after a dust storm at three nearshore marine stations. The data are consistent with macronutrient increase after the storms. Dust storms could become a very important source of nutrients to the ocean in future global warming scenarios.
机译：首次评估了巴塔哥尼亚的风尘作为西南大西洋地表水大量营养素的来源。 2016年春季，进行了一系列含尘实验，以评估海水中大量营养素的溶解动力学。结果表明，大量养分对海水的贡献取决于灰尘源和添加量。向海水中添加保守量的巴塔哥尼亚粉尘可产生硝酸盐（NO3-）和硅酸（Si（OH）（4）），但不会产生磷酸盐（PO43-）。额外的粉尘输入系统会导致较高的常量营养素浓度。从附近的一块燃烧的土地上收集的颗粒没有为海水提供任何常量营养素。因此，每个尘埃事件可能会根据颗粒的来源而不同地影响生物生产力。溶出度实验表明，尘埃中的大量养分在颗粒沉积在海面后立即可用。该研究包括在三个近海海洋站点沙尘暴前后对大量营养素浓度的现场测量。数据与暴风雨后大量营养素增加保持一致。在未来的全球变暖情景中，沙尘暴可能成为海洋营养的重要来源。

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  • 来源
    《Oceanography》 |2018年第4期|33-39|共7页
  • 作者

    Paparazzo Flavio E.; Crespi-Abril Augusto C.; Goncalves Rodrigo J.; Barbieri Elena S.; Gracia Villalobos Leilen L.; Solis Miriam E.; Soria Gaspar;

  • 作者单位

    Consejo Nacl Invest Cient & Tecn, Lab Oceanog Biol LOBio, Ctr Estudio Sistemas Marinos CESIMAR, Puerto Madryn, Chubut, Argentina|Consejo Nacl Invest Cient & Tecn, Lab Oceanog Quim & Contaminac Aguas LOQyCA, Ctr Estudio Sistemas Marinos CESIMAR, Puerto Madryn, Chubut, Argentina|UNPSJB, Puerto Madryn, Chubut, Argentina;

    UNPSJB, Puerto Madryn, Chubut, Argentina|CESIMAR CONICET, LOBio, Puerto Madryn, Chubut, Argentina;

    CESIMAR CONICET, LOBio, Puerto Madryn, Chubut, Argentina;

    UNPSJB, Puerto Madryn, Chubut, Argentina|CESIMAR CONICET, LOBio, Puerto Madryn, Chubut, Argentina;

    CESIMAR CONICET, LOBio, Puerto Madryn, Chubut, Argentina;

    UNPSJB, Puerto Madryn, Chubut, Argentina|CESIMAR CONICET, LOQyCA, Puerto Madryn, Chubut, Argentina;

    UNPSJB, Puerto Madryn, Chubut, Argentina|CESIMAR CONICET, LOBio, Puerto Madryn, Chubut, Argentina;

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