Long term in situ survey of total dissolved iron concentrations on the MoMAR observatory

2014 IEEE Sensor Systems for a Changing Ocean (SSCO). Pub Date : 2014-10-01 DOI:10.1109/SSCO.2014.7000366

Agathe Laes-Huon, J. Legrand, V. Tanguy, C. Cathalot, J. Blandin, J. Rolin, P. Sarradin

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引用次数: 2

Abstract

Study of the temporal dynamics of faunal assemblages and their habitat at the Lucky strike vent was performed using the TEMPO ecological module on the MoMAR (Monitoring of the Mid-Atlantic Ridge) deep sea observatory. An in situ analyzer (CHEMINI) was implemented onto this structure in order to determine total dissolved iron concentrations associated with an optode and a temperature probe. Hence, we present here the long term in situ analysis of total dissolved iron (6 months, 2013-2014) at the Eiffel Tower edifice. The daily analyzed in situ standard (25μmol.L-1) showed an excellent reproducibility (1.07%, n=522), illustrating the good analytical performances of the CHEMINI, validating the iron concentrations measured by the instrument. CHEMINI was reliable, robust over time for in situ analysis. The averaged total dissolved iron concentrations for the 6 months period remain low ([DFe] = 7.12 ± 2.11 μmol L-1, n = 519), but display some noticeable variations related to the temperature. Indeed, iron and temperature correlated significantly, and frequency spectra indicated a maximal contribution of frequencies around 4-5 days for both variables.

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MoMAR天文台对总溶解铁浓度的长期原位调查

利用中大西洋脊监测(MoMAR)深海观测站的TEMPO生态模块，对Lucky strike火山口动物群落及其栖息地的时间动态进行了研究。为了确定与光电二极管和温度探头相关的总溶解铁浓度，在该结构上实施了原位分析仪(CHEMINI)。因此，我们在这里展示了对埃菲尔铁塔总溶解铁的长期原位分析(2013-2014年6个月)。每日原位分析标准品(25μmol.L-1)重现性良好(1.07%，n=522)，说明CHEMINI具有良好的分析性能，验证了仪器测量的铁浓度。CHEMINI是可靠的，随着时间的推移，稳健的原位分析。6个月的平均总溶解铁浓度保持在较低水平([DFe] = 7.12±2.11 μmol L-1, n = 519)，但随温度变化明显。事实上，铁和温度显著相关，频谱表明频率在4-5天左右对两个变量的贡献最大。

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2014 IEEE Sensor Systems for a Changing Ocean (SSCO).

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