Subsurface temperature Research Papers - Academia.edu (original) (raw)

2024, Reviews of Geophysics

The evolution of ocean temperature measurement systems is presented with a focus on the development and accuracy of two critical devices in use today (expendable bathythermographs and conductivity‐temperature‐depth instruments used on Argo floats). A detailed discussion of the accuracy of these devices and a projection of the future of ocean temperature measurements are provided. The accuracy of ocean temperature measurements is discussed in detail in the context of ocean heat content, Earth's energy imbalance, and thermosteric sea level rise. Up‐to‐date estimates are provided for these three important quantities. The total energy imbalance at the top of atmosphere is best assessed by taking an inventory of changes in energy storage. The main storage is in the ocean, the latest values of which are presented. Furthermore, despite differences in measurement methods and analysis techniques, multiple studies show that there has been a multidecadal increase in the heat content of bot...

2024, Arabian Journal of Geosciences

Mount Pandan is an active volcano with geothermal phenomena and is located in tectonically active East Java, Indonesia. We conducted a geomagnetic study around Mount Pandan to obtain further information about fault structures and geothermal prospects. We established 245 geomagnetic observation stations covering an area of 20 km2. We calculated the magnetic anomalies, applied upward continuation and reduction to the pole, and calculated the improved normalized horizontal tilt angle to interpret the area. Furthermore, modeling was performed that included previous research. Our study identified NW–SE-, SW-NE-, and W-E-trending structures that might be affected by the Kendeng thrust fault and act as pathways for geothermal fluid flow. This geothermal fluid is estimated to flow from the southern area between Mount Pandan and Mount Wilis toward the north. There are several hot springs around Mount Pandan and Tirtohusodo hot spring near Mount Wilis. Thus, the heat source may be located in ...

2023, Arabian Journal of Geosciences

2023

Water quality deterioration hinders economic and social development in developing countries that are facing freshwater security and shortages. This study based on the collection of 29 water samples and focused on the relationship between sewage treatment plant and groundwater system surrounding it using multidisciplinary approach that combines the characterization of groundwater system and its connection with surrounding canal and drains; using chemical and isotopic characterization revealing that there is a direct relation between the surface water system and surrounding groundwater system. About 58% of the groundwater samples and all surface water samples in the investigated area are threatened by high concentrations of trace elements. The multivariate statistical analysis elucidates that anthropogenic effect, fertilizers sewage contamination are the main causes of groundwater pollution. Nearly; 31% and 11.5% of groundwater samples posing oral chronic non carcinogenic health risk ...

2023

The Endut geothermal prospect is located in Banten Province, Indonesia. The geological setting of the area is dominated by quaternary volcanic, tertiary sediments and tertiary rock intrusion. This area has been in the preliminary study phase of geology, geochemistry, and geophysics. As one of the geophysical study, the gravity data measurement has been carried out and analyzed in order to understand geological condition especially subsurface fault structure that control the geothermal system in Endut area. After precondition applied to gravity data, the complete Bouguer anomaly have been analyzed using advanced derivatives method such as Horizontal Gradient (HG) and Euler Deconvolution (ED) to clarify the existance of fault structures. These techniques detected boundaries of body anomalies and faults structure that were compared with the lithologies in the geology map. The analysis result will be useful in making a further realistic conceptual model of the Endut geothermal area.

2023, MATEC Web of Conferences

Rembang Madura Kangean Sakala (RMKS) fault zone and W-E structures of Kendeng Zone are the main structural elements in back arc basin, East Java, Indonesia. There are many perspectives about the overpressure zone at the basin. This research focus on the overpressure zone that related with formation and tectonic evolution. The study infer that high overpressure is explained by regional and local mechanisms. The results of analysis of log derived porosities at Karang Mudi-1 (KM-1) well indicate that high overpressure and overpressure was Neogen Formation (Mundu, Wonocolo, Ngrayong). Pore pressure prediction at KM-1 exerted Eaton’s method. There are two overpressure zones at depth 2.680 – 4.900 fTVD (B Zone) and 5.600 – 8.400 fTVD (D Zone). High overpressure D Zone are regionally caused by flexural structure (anticline and fracture) from transpression setting (West – East RMKS). High overpressure in KM-1 is transpression setting early which the overpressure follow the pop-up boundary. ...

2023, BULLETIN OF THE MARINE GEOLOGY

East Java basin is a very large sedimentary basin and has been proven produce hydrocarbons, this basin consists of several different sub-basins, one of the sub-basin is in the Madura Strait and surrounding areas. Gravity is one of the geophysical methods that can be used to determine geological subsurface configurations and delineate sedimentary sub-basin based on density parameter. The purposes of this study are to delineate sedimentary sub-basins, estimate the thickness of sedimentary rock, interpret subsurface geological model and identify geological structures in the Madura Strait and surrounding areas. Data analysis which used in this paper are spectral analysis, spectral decomposition filter and 2D forward modeling. The results of the spectral analysis show that the thickness of sedimentary rock is about 3.15 Km. Spectral decomposition is performed at four different wave numbers cut off, namely (0.36, 0.18, 0.07 and 0.04), each showing anomaly patterns at depth (1 Km, 2 Km, 3 ...

2023, Journal of Geophysical Research: Atmospheres

Sea surface temperature (SST) variability has been shown to have predictive value for land precipitation, although SSTs are unable to fully predict intraseasonal to interannual hydrologic extremes. The possible remote effects of large-scale land surface temperature (LST) and subsurface temperature (SUBT) anomalies in geographical areas upstream and closer to the areas of drought/flood have largely been ignored. Here evidence from climate observations and model simulations addresses these effects. Evaluation of observational data using Maximum Covariance Analysis identifies significant correlations between springtime 2-m air temperature (T2 m) cold (warm) anomalies in both the western U.S. and the Tibetan Plateau and downstream drought (flood) events in late spring/summer. To support these observational findings, climate models are used in sensitivity studies, in which initial LST/SUBT anomaly is imposed to produce observed T2 m anomaly, to demonstrate a causal relationship for two important cases: between spring warm T2 m/LST/SUBT anomalies in western U.S. and the extraordinary 2015 flood in Southern Great Plains and adjacent regions and between spring cold T2 m/LST/SUBT anomalies in the Tibetan Plateau and the severe 2003 drought south of the Yangtze River region. The LST/SUBT downstream effects in North America are associated with a large-scale atmospheric stationary wave extending eastward from the LST/SUBT anomaly region. The effects of SST in these cases are also tested and compared with the LST/SUBT effects. These results suggest that consideration of LST/SUBT anomalies has the potential to add value to intraseasonal prediction of dry and wet conditions, especially extreme drought/flood events. The results suggest the importance of developing land data and models capable of preserving observed soil memory.

2022, Open Geosciences

The subsurface temperature has many impacts on geological phenomena such as hydrocarbon generation, geothermal energy, mineralization, and geological hazards. The Northeast Java Basin has various interesting phenomena, such as many oil fields, active faults, mud eruptions, and some active and dormant volcanoes. We measured temperature data from tens of wells along a 130 km survey line with an average spacing of 5 km. We also measured the thermal conductivity of rocks of various lithologies along the survey line to provide geothermal heat flow data. We propose integrated modeling for profiling the subsurface temperature beneath the survey line from Mt. Lawu to Mt. Muriah in the Northeast Java Basin. The modeling of subsurface temperature integrates various input data such as a thermal conductivity model, surface temperature, gradient temperature, a geological model, and geothermal heat flow. The thermal conductivity model considers the subsurface geological model. The temperature mod...

2022, Reviews of Geophysics

2022, MATTER: International Journal of Science and Technology

Banjarsari village is located to the south of the Bledug Kuwu, the famous of mud volcano in Central Java province. In this location there are surface manifestations such as the mudflow and the saltwater explosion. In this village there are traditional salt mines, therefore a study of the potential source of salt mines is necessary. The aims of this research are detecting and mapping subsurface area of the saltwater intrusion. The direct measurement was conducted using OYO model 2119C resistivitymeter by using Wenner-Schlumberger array configuration and an

2022

Preliminary research at Mount Pandan found geothermal manifestation. Indication of geothermal in Mount Pandan is characterized by the appearance of geothermal manifestations such as hot springs in the Banyukuning and Jarikasinan. The location of the preliminary research administratively in Nganjuk, Madiun, and Bojonegoro district, East Java Province. The aims of this research is to determine the physical characteristics of hot springs, hot springs chemical properties, and type of the hot springs in the Mount Pandan. The research method is collecting geological data, geochemical data, and laboratory analysis. Based on the field observations there were two hotsprings, Jarikasinan and Banyukuning. Jarikasinan hotspring temperature is 38 ° C - 39 ° C with air temperature 32 ° C, 1930-1940 TDS, pH 6, flow 0.67 L / s and konduktivity of 2.58 ms. Banyukuning hotspring temperature is 38 ° C with an air temperature of 24 ° C, 1295 TDS, pH 6-7, discharge ranged between 1 L / s and konduktivit...

2022, BULLETIN OF THE MARINE GEOLOGY

2022

Investigation of geological structure over caldera hosted geothermal system using geological study and remote sensing analysis

2022, iwtc.info

Due to the new modern life style in the Egyptian villages, a huge amount of water is used in domestic purposes. Because most of the villages are unsewered, the used water is artificially recharged to the subsurface causing water logging and groundwater pollution. Integration between water level, sedimentological setting, stable isotopes, subsurface temperature and hydrochemistry were used to investigate and evaluate the problem. Water level indicates that, water logging has been occurred due to the low hydraulic load of the surface clayey layer compared to the recharged amount of water. It is also estimated using the other criteria that, the sewage water polluted groundwater in the shallow and the intermediate zones. The pollution in the intermediate zone occurred where the second silty clay layer is missed. Draining the soil and constructing the sewage pipe net are the solutions to stop water logging and groundwater pollution.

2022, Open Geosciences

2022

2021

Background The history of terrestrial heat flow density (HFD) studies conducted in Indonesian sedimentary basin regions dates as far back as the early-mid-1980s. A number of authors, e.g., Carvalho et al. (1980) and Thamrin (1985), pioneered the first determinations of HFD values using temperature data from hydrocarbon wells and thermal conductivity measurements on their respective core samples. However, there had been an over two

2021, PROCEEDINGS OF THE 3RD INTERNATIONAL SEMINAR ON METALLURGY AND MATERIALS (ISMM2019): Exploring New Innovation in Metallurgy and Materials

Moringa oleifera is an endemic plant in East Java Province spreading over several districts in this region. Moringa oleifera is not only the potential and miracle natural resources in Indonesia but also the crucial alternative solution combating malnutrition linked to micro-macro elements deficiency. This study was conducted using Moringa oleifera leaf powder (MOLP) from Madura Island and the other four districts. The basic profile of micro and macro elements was quantified by X-ray fluorescence spectroscopy (XRF) analysis. Importantly, the higher level of Phosphor, Sulfur, and Potassium was found in the MOLP Malang area, while the lowest one was discovered in the Madura sample. By contrast, a considerable amount of Calcium, Manganese, Ferrum, and Molybdenum was dominantly found in the Madura sample. This data imply that Moringa oleifera leaf powder in East Java regions has a potential ingredient in the development of green halal materials synthesis and application, biomedical resources, and other applications. To sum up, the exploration and application of MOLP from Madura variety for future clinical and non-clinical administration may become an alternative solution for combating metabolic distribution-related diseases. Thus, further expanding research is urgently required to establish the application of MOLP for medical and biomedical engineering linked advanced bionanotechnology.

2019, Gruyter

The subsurface temperature has many impacts on geological phenomena such as hydrocarbon generation , geothermal energy, mineralization, and geological hazards. The Northeast Java Basin has various interesting phenomena, such as many oil fields, active faults, mud eruptions, and some active and dormant volcanoes. We measured temperature data from tens of wells along a 130 km survey line with an average spacing of 5 km. We also measured the thermal conductivity of rocks of various lithologies along the survey line to provide geother-mal heat flow data. We propose integrated modeling for profiling the subsurface temperature beneath the survey line from Mt. Lawu to Mt. Muriah in the Northeast Java Basin. The modeling of subsurface temperature integrates various input data such as a thermal conductivity model, surface temperature, gradient temperature, a geological model, and geothermal heat flow. The thermal conductivity model considers the subsurface geological model. The temperature modeling uses the finite difference of Fourier's law, with an input subsurface thermal conductivity model, geothermal heat flow, and surface temperature. The subsurface temperature profile along with survey line shows some interesting anomalies which correlate with either subsurface volcanic activity or the impact of fault activity .

2013, Geophysical Prospecting

Temperature modeling around the Vejrum salt structure in Denmark shows that the heat flow near the top is twice the regional heat flow. The temperature in the vicinity of the top of the diapir is thus anomalously high. Overlying permeable formations could therefore be attractive for geothermal energy exploitation. A negative temperature anomaly of −20°C is calculated around the root of the salt body. Comparisons between calculated and measured temperatures are used to test the model. It is shown that measurements of heat flow (or temperature gradients) in wells penetrating the region of groundwater circulation could be used in identification of salt diapirs.