Periodicities in sediment temperature time-series at a marine shallow water hydrothermal vent in Milos Island (Aegean Volcanic arc, Eastern Mediterranean)
Periodicities in sediment temperature time-series at a marine shallow water hydrothermal vent in Milos Island (Aegean Volcanic arc, Eastern Mediterranean)
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DOI：
10.1016/j.jmarsys.2003.11.015
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发表时间：
2004-05-01
影响因子：
2.8
通讯作者：
Dando, PR
中科院分区：
文献类型：
--
作者：
Aliani, S;Meloni, R;Dando, PR
研究了海洋浅热液喷口（米洛斯、希腊火山弧、爱琴海）海底总压力（潮汐加大气压力）、海水温度和沉积物温度的时间序列数据集，以确定影响喷口周期性的因素。海底压力和喷口温度主要是相反的相位，喷口温度的主要波动发生在潮汐频率。虽然大气压力的波动与潮汐压力的波动具有相同的量级，但在昼夜频率下，大气压力的贡献要弱得多。记录到沉积物温度的声波突然不连续性，其中至少有一个可能是由地震事件引起的。沉积物温度记录中没有反映海水温度的变化。瞬时载荷，如潮汐载荷、气压和固体潮，可能会影响沉积物中的孔隙压力，从而影响流体排出和沉积物温度。沉积物温度波动的主要原因取决于潮汐负荷。地球潮汐形式的引力也可能参与其中，大气压可能是长周期温度振荡的原因。(C)2004 Elsevier B.V.保留所有权利。
Time-series data sets of total bottom pressure (tidal plus atmospheric), seawater temperature and sediment temperature from a marine shallow hydrothermal vent (Milos, Hellenic Volcanic Arc, Aegean Sea) were studied to determine factors influencing periodicity at the vents. Bottom pressure and vent temperature were mainly opposite in phase, with the main fluctuations of vent temperature occurring at tidal frequencies. Although the fluctuations in atmospheric pressure were of the same order as those due to tidal pressure, the contribution of atmospheric pressure was considerably weaker at diurnal frequencies. Sonic sudden discontinuities in sediment temperature were recorded, at least one of these may have been caused by seismic events. Seawater temperature changes were not reflected in the sediment temperature record. Transient loadings, such as tidal loadings, barometric pressure and earth tides, may affect the pore pressure in sediments, influencing fluid expulsion and sediment temperature as a consequence. Most of the contribution to the fluctuations in sediment temperature depends on tidal loadings. Gravitational forces, in the form of earth tides, can also be involved and barometric pressure is probably responsible for long period temperature oscillations. (C) 2004 Elsevier B.V. All rights reserved.