Potential controls of isoprene in the surface ocean
Potential controls of isoprene in the surface ocean
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DOI：
10.1002/2016gb005531
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发表时间：
2017-04-01
影响因子：
5.2
通讯作者：
Carpenter, L. J.
中科院分区：
文献类型：
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作者：
Hackenberg, S. C.;Andrews, S. J.;Carpenter, L. J.
报告了北冰洋和大西洋上空异戊二烯的表层海洋浓度和垂直分布、大气混合比和计算的跨越大约125度(北纬80度-S 45度)的海-气通量。海洋异戊二烯浓度与一些同时监测的生物变量有关，包括叶绿素a(Chla)、光保护色素、综合初级生产力(IntPP)和蓝藻细胞计数，在高于20摄氏度的海洋表面温度下，与所有相关变量相比，异戊二烯浓度更高。异戊二烯与光保护类胡萝卜素总量之间的相关性是所有邮轮中最一致的，这里首次报道了这一点。基于这些关系的线性回归分析的参数化对北极和大西洋数据表现良好，与现有的基于Chla的参数化相比，产生了更好的观测拟合。使用来自卫星的Chla和intPP对异戊二烯地表水浓度进行全球外推，根据所使用的数据集和算法，在系数2的60%至85%范围内再现了现场数据和绝对值的一般趋势。
Isoprene surface ocean concentrations and vertical distribution, atmospheric mixing ratios, and calculated sea-to-air fluxes spanning approximately 125 degrees of latitude (80 degrees N-45 degrees S) over the Arctic and Atlantic Oceans are reported. Oceanic isoprene concentrations were associated with a number of concurrently monitored biological variables including chlorophyll a (Chl a), photoprotective pigments, integrated primary production (intPP), and cyanobacterial cell counts, with higher isoprene concentrations relative to all respective variables found at sea surface temperatures greater than 20 degrees C. The correlation between isoprene and the sum of photoprotective carotenoids, which is reported here for the first time, was the most consistent across all cruises. Parameterizations based on linear regression analyses of these relationships perform well for Arctic and Atlantic data, producing a better fit to observations than an existing Chl a-based parameterization. Global extrapolation of isoprene surface water concentrations using satellite-derived Chl a and intPP reproduced general trends in the in situ data and absolute values within a factor of 2 between 60% and 85%, depending on the data set and algorithm used.