caa a22 4500 605517460 CHVBK 20210128100720.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10533-015-0136-x doi (NATIONALLICENCE)springer-10.1007/s10533-015-0136-x Global distribution and surface activity of macromolecules in offline simulations of marine organic chemistry [Elektronische Daten] [Oluwaseun Ogunro, Susannah Burrows, Scott Elliott, Amanda Frossard, Forrest Hoffman, Robert Letscher, J. Moore, Lynn Russell, Shanlin Wang, Oliver Wingenter] Organic macromolecules constitute a high percentage of remote sea spray. They enter the atmosphere through adsorption onto bubbles followed by bursting at the ocean surface, and go on to influence the chemistry of the fine mode aerosol. We present a global estimate of mixed-layer macromolecular distributions, driven by offline marine systems model output. The approach permits estimation of oceanic concentrations and bubble film surface coverages for several classes of organic compound. Mixed layer levels are computed from the output of a global ocean ecodynamics model by relating the macromolecules to standard biogeochemical tracers. Steady state is assumed for labile forms, and for longer-lived components we rely on ratios to existing transported variables. Adsorption is then represented through conventional Langmuir isotherms, with equilibria deduced from laboratory analogs. Open water concentrations locally exceed one micromolar carbon for the total of proteins, polysaccharides and refractory heteropolycondensates. The shorter-lived lipids remain confined to regions of strong biological activity. Results are evaluated against available measurements for all compound types, and agreement is generally well within an order of magnitude. Global distributions are further estimated for both fractional coverage of bubble films at the air-water interface and the two-dimensional concentration excess. Overall, we show that macromolecular mapping provides a novel tool for the comprehension of oceanic surfactant patterns. These results may prove useful in planning field experiments and assessing the potential response of surface chemical behaviors to global change. The Author(s), 2015 Organic macromolecules nationallicence Mixed layer distributions nationallicence Langmuir adsorption nationallicence Fractional coverage nationallicence Bubble films nationallicence Air-water interface nationallicence Ogunro Oluwaseun New Mexico Institute of Mining and Technology, 87801, Socorro, NM, USA aut Burrows Susannah Pacific Northwest National Laboratory, 99354, Richland, WA, USA aut Elliott Scott Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut Frossard Amanda Scripps Institution of Oceanography, 92093, La Jolla, CA, USA aut Hoffman Forrest Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA aut Letscher Robert University of California, 92617, Irvine, CA, USA aut Moore J. University of California, 92617, Irvine, CA, USA aut Russell Lynn Scripps Institution of Oceanography, 92093, La Jolla, CA, USA aut Wang Shanlin Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut Wingenter Oliver New Mexico Institute of Mining and Technology, 87801, Socorro, NM, USA aut Biogeochemistry Springer International Publishing 126/1-2(2015-11-01), 25-56 0168-2563 126:1-2<25 2015 126 10533 https://doi.org/10.1007/s10533-015-0136-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0136-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ogunro Oluwaseun New Mexico Institute of Mining and Technology, 87801, Socorro, NM, USA aut NATIONALLICENCE 700 1- Burrows Susannah Pacific Northwest National Laboratory, 99354, Richland, WA, USA aut NATIONALLICENCE 700 1- Elliott Scott Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut NATIONALLICENCE 700 1- Frossard Amanda Scripps Institution of Oceanography, 92093, La Jolla, CA, USA aut NATIONALLICENCE 700 1- Hoffman Forrest Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA aut NATIONALLICENCE 700 1- Letscher Robert University of California, 92617, Irvine, CA, USA aut NATIONALLICENCE 700 1- Moore J. University of California, 92617, Irvine, CA, USA aut NATIONALLICENCE 700 1- Russell Lynn Scripps Institution of Oceanography, 92093, La Jolla, CA, USA aut NATIONALLICENCE 700 1- Wang Shanlin Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut NATIONALLICENCE 700 1- Wingenter Oliver New Mexico Institute of Mining and Technology, 87801, Socorro, NM, USA aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 126/1-2(2015-11-01), 25-56 0168-2563 126:1-2<25 2015 126 10533