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Satellite-derived surface temperature and in situ measurement at Solfatara of Pozzuoli (Naples, Italy)

机译:卫星产生的地表温度和波佐利索尔法塔拉的原位测量(意大利那不勒斯)

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摘要

Ground thermal anomalies in volcanic-hydrothermal systems, where the outflow of hot fluids gives rise to fumarolic fields, soil degassing, and hot soils, have, up to now, rarely been investigated by using satellite. Here we report a comparison between surface temperature derived by satellite data and a large data set of measured soil temperatures and CO2 fluxes for a volcanic-hydrothermal system, the Solfatara of Pozzuoli (Campi Flegrei, Italy). Surface temperatures derived from ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) data are compared with soil temperatures and CO2 fluxes from four surveys performed in 2003, 2010, and in 2014. The good match between the spatial distributions of computed and measured temperatures suggests the adequacy of satellite data to describe the Solfatara thermal anomaly, while the correspondence between temperatures and CO2 fluxes, evidences the link between degassing and heating processes. The ASTER derived surface temperatures (14-37 degrees C) are coherent with those measured in the soil (10-97 degrees C at 10 cm depth), considering the effect of the thermal gradients which characterize the degassing area of Solfatara. This study shows that satellite data can be a very powerful tool with which to study surface thermal anomalies, and can provide a supplementary tool to monitor thermal evolution of restless volcanoes.
机译:迄今为止,很少使用卫星对火山-热液系统中的地热异常进行研究,在该异常中,热流体的流出会引起富马地,土壤脱气和热土。在这里,我们报告了通过卫星数据得出的地表温度与大量数据集之间的比较,该数据集是火山水热系统Pozzuoli的Solfatara(意大利,Campi Flegrei)的测得的土壤温度和CO2通量的比较。从2003年,2010年和2014年进行的四次调查中,将从ASTER(先进的星载热发射和反射辐射计)数据得出的地表温度与土壤温度和CO2通量进行了比较。计算和测量温度的空间分布之间的良好匹配表明:卫星数据足以描述Solfatara热异常,而温度和CO2通量之间的对应关系则证明了脱气与加热过程之间的联系。考虑到代表Solfatara脱气区域的热梯度的影响,ASTER得出的表面温度(14-37摄氏度)与在土壤中测得的温度(10 cm深度10-97摄氏度)是一致的。这项研究表明,卫星数据可以是研究地表热异常的非常强大的工具,并且可以提供监视不安火山的热演化的补充工具。

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