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首页> 外文期刊>Journal of oceanography >High-resolution observations of dissolved isoprene in surface seawater in the Southern Ocean during austral summer 2010-2011
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High-resolution observations of dissolved isoprene in surface seawater in the Southern Ocean during austral summer 2010-2011

机译：2010-2011年南半球夏季南洋表层海水中溶解异戊二烯的高分辨率观测

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摘要

We measured dissolved isoprene (2-methyl-1,3-butadiene; C_5H_8) concentrations in a broad area of the southern Indian Ocean and in the Indian sector of the Southern Ocean from 35°S to 64°S and from 37°E to 111°E during austral summer 2010-2011. Isoprene concentrations were continuously measured by use of a proton-transfer-reaction mass spectrometer combined with a bubbling-type equilibrator. Concentrations of isoprene and its emission flux throughout the study period ranged from 0.2 to 395pmolL~(-1) and from 181 to 313 nmol m~(-2) day~(-1), respectively, the averages being generally higher than those of previous studies. Although we found a significant linear positive relationship between isoprene and chlorophyll-a concentrations (r~2 = 0.37, n = 36, P ＜ 0.001), the correlation coefficient was lower than previously reported. In contrast, in the high-latitude area (＞53°S) we identified a significant negative correlation (r~2 = 0.59, n = 1263, P ＜ 0.001) between isoprene and the temperature-normalized partial pressure of carbon dioxide (n-pCO_2), used as an indicator of net community production in this study. This suggests that residence times and factors controlling variations in isoprene and n-pCO_2 are similar within a physically stable water column.
机译：我们测量了印度洋南部和印度洋南部35°S至64°S和37°E至70°S的广阔区域中溶解的异戊二烯（2-甲基-1,3-丁二烯; C_5H_8）的浓度在2010年至2011年的夏季，温度为111°E。异戊二烯浓度是通过使用质子转移反应质谱仪和鼓泡型平衡器连续测量的。在整个研究期间，异戊二烯及其排放通量的浓度分别为0.2至395pmolL〜（-1）和181至313nmol m〜（-2）天〜（-1），平均值通常高于之前的学习。尽管我们发现异戊二烯和叶绿素-a浓度之间存在显着的线性正相关关系（r〜2 = 0.37，n = 36，P ＜0.001），但相关系数低于以前的报道。相反，在高纬度地区（> 53°S），我们发现异戊二烯与二氧化碳的温度归一化分压之间存在显着负相关（r〜2 = 0.59，n = 1263，P ＜0.001）。 -pCO_2），用作本研究中社区净生产的指标。这表明在物理稳定的水柱中，停留时间和控制异戊二烯和n-pCO_2变化的因素相似。

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  • 来源
    《Journal of oceanography》 |2014年第3期|225-239|共15页
  • 作者

    Sohiko Kameyama; Satoshi Yoshida; Hiroshi Tanimoto; Satoshi Inomata; Koji Suzuki; Hisayuki Yoshikawa-Inoue;

  • 作者单位

    Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, North 10 West 5, Kita-ku, Sapporo 060-0810, Japan;

    Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, North 10 West 5, Kita-ku, Sapporo 060-0810, Japan;

    Center for Global Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba,Ibaraki 305-8506, Japan;

    Center for Global Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba,Ibaraki 305-8506, Japan;

    Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, North 10 West 5, Kita-ku, Sapporo 060-0810, Japan;

    Graduate School of Environmental Science, Faculty of Environmental Earth Science, Hokkaido University, North 10 West 5, Kita-ku, Sapporo 060-0810, Japan;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    High-resolution measurement; Isoprene; pCO_2; PTR-MS; Southern Ocean;

    机译：高分辨率测量;异戊二烯;pCO_2;PTR-MS;南部海洋;

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