Marine microgels as a source of cloud condensation nuclei in the high Arctic
Marine microgels as a source of cloud condensation nuclei in the high Arctic
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DOI：
10.1073/pnas.1102457108
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发表时间：
2011-08-16
影响因子：
11.1
通讯作者：
Coz, Esther
中科院分区：
文献类型：
--
作者：
Orellana, Monica V.;Matrai, Patricia A.;Coz, Esther
海洋微凝胶在海洋盆地尺度的海洋地球化学动力学中起着重要的调节作用。在本文中，我们证明，在高北极，海洋凝胶具有独特的物理化学特性起源于冰藻和/或浮游植物在地表水中产生的有机物质。在这个溶解的有机池中的聚合物组装速度更快，微凝胶产量比其他纬度更高。这些北极海洋凝胶所示的可逆相变，作为pH值的函数，二甲硫醚，和dimethylsulfoniopropionate浓度，刺激凝胶达到直径小于1 μ m的大小。这些海洋凝胶被确定与抗体探针特定的物质从表面沃茨，大小，并在空气中的气溶胶，雾和云水定量，强烈表明，他们占主导地位的可用云凝结核数量的人口在高北极（北80度N）在夏季。有关海洋凝胶的新兴特性的知识为控制云形成和辐射强迫的过程提供了重要的新见解，并将海洋表面的生物学与北冰洋中部以及可能所有海洋的云特性和气候联系起来。
Marine microgels play an important role in regulating ocean basin-scale biogeochemical dynamics. In this paper, we demonstrate that, in the high Arctic, marine gels with unique physicochemical characteristics originate in the organic material produced by ice algae and/or phytoplankton in the surface water. The polymers in this dissolved organic pool assembled faster and with higher microgel yields than at other latitudes. The reversible phase transitions shown by these Arctic marine gels, as a function of pH, dimethylsulfide, and dimethylsulfoniopropionate concentrations, stimulate the gels to attain sizes below 1 mu m in diameter. These marine gels were identified with an antibody probe specific toward material from the surface waters, sized, and quantified in airborne aerosol, fog, and cloud water, strongly suggesting that they dominate the available cloud condensation nuclei number population in the high Arctic (north of 80 degrees N) during the summer season. Knowledge about emergent properties of marine gels provides important new insights into the processes controlling cloud formation and radiative forcing, and links the biology at the ocean surface with cloud properties and climate over the central Arctic Ocean and, probably, all oceans.