Results 81 to 90 of about 16,232 (191)

Radium Mass Balance Sensitivity Analysis for Submarine Groundwater Discharge Estimation in Semi-Enclosed Basins: The Case Study of Long Island Sound

Frontiers in Environmental Science, 2020
Estimation of submarine groundwater discharge (SGD) to semi-enclosed basins by Ra isotope mass balance is herein assessed. We evaluate 224Ra, 226Ra, and 228Ra distributions in surface and bottom waters of Long Island Sound (CT-NY, United States ...
Joseph Tamborski, Joseph Tamborski, Joseph Tamborski, J. Kirk Cochran, Henry Bokuniewicz, Christina Heilbrun, Jordi Garcia-Orellana, Jordi Garcia-Orellana, Valentí Rodellas, Robert Wilson   +9 more
doaj   +1 more source

A continuous 500‐year sediment record of inundation by local and distant tsunamis in South‐Central Chile (40.1°S)

The Depositional Record, Volume 11, Issue 5, Page 1285-1310, November 2025.
Tsunami events over the past 500 years inundated Laguna Gemela West (Chile), leading to distinct sandy deposits in the lake record. This provides a complete perspective on tsunami inundation, including giant tsunamis, small local tsunamis and tsunamis that originated >100 km away from the site.
Jasper Moernaut, Evelien Boes, Daniel Melnick, Matías Carvajal, Markus Niederstätter, Sabine Schmidt, Diego Aedo, Mario Pino, Marc De Batist   +8 more
wiley   +1 more source

Using 222Rn to Determine Groundwater Velocities in a Braidplain Aquifer

Hydrological Processes, Volume 39, Issue 10, October 2025.
This study assesses bank infiltration from a braided river. We find a small change in infiltration velocity for high versus low river flow periods, and a spatial variation of groundwater velocities linked to paleochannels. Consideration of more realistic groundwater flow geometries demonstrates that groundwater residence times based on conventional ...
Christy W. Songola, Leanne K. Morgan, Eddie W. Banks, Crile Doscher, Ian Cartwright   +4 more
wiley   +1 more source

High-resolution decadal-scale eruption age dating of young oceanic basalts at an active hydrothermal vent site

Frontiers in Geochemistry
Here we report (210Pb/226Ra), (226Ra/230Th), (230Th/238U) and (234U/238U) disequilibria for eleven lavas from the ABE vent site in the Lau Basin. Most ABE lavas have (210Pb/226Ra) > 1 and (226Ra/230Th) > 3. These results indicate that most of these
Kenneth W. W. Sims, Lisa B. Kant, Gregory J. Stark, Mark K. Reagan, Jeff J. Standish, Charles H. Langmuir   +5 more
doaj   +1 more source

Vertical distributions of 226Ra, 228Ra, and 137Cs activities in the southwestern part of the Sea of Okhotsk

EPJ Web of Conferences, 2012
We collected 14 water column seawater samples in the southwestern part of the Sea of Okhotsk and employed low-background γ-spectrometry with convenient minimal radiochemical processing to determine the activities of 226Ra (half-life t1/2 = 1600 y), 228Ra
Hamajima Y., Kofuji H., Nagao S., Minakawa M., Yoshida K., Inoue M., Yamamoto M.   +6 more
doaj   +1 more source

Evaluation of radioactive pollution in sediment samples of Borçka Dam Lake, Turkey

Cumhuriyet Science Journal, 2019
In this research, the concentrations of natural (226Ra, 232Thand 40K) and anthropogenic (137Cs) radionuclides were measured in sedimentsamples collected from the Borçka Dam Lake using a high purity germaniumdetector (HPGe).
Murat Şirin
doaj   +1 more source

Unraveling Historical Carbon Records of Zostera marina Seagrass Meadows: High‐Resolution Analysis, Dating, and Methodological Evaluation of Deep Sediment Cores

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 10, October 2025.
Abstract Understanding long‐term carbon storage in temperate seagrass habitats is crucial for assessing their role as a “nature‐based” climate solution. However, many studies often use shallow cores, low‐resolution analyses, and inconsistent methodologies, limiting the ability to infer large‐scale carbon storage potential. This study presents the first
Jessica A. Cramp, Jodie K. Fisher, Geoff E. Millward, Siân E. Rees, William Blake, Mark Parry, Martin J. Attrill   +6 more
wiley   +1 more source

Decoding Past Microbial Communities Shifts Induced by Natural and Anthropogenic Disturbance Events Through Extracellular DNA

Molecular Ecology, Volume 34, Issue 20, October 2025.
ABSTRACT Coastal marine ecosystems face escalating threats from multiple anthropogenic stressors, including the release of industrial contaminants. Despite decades of industrial activity impacting marine ecosystems, long‐term effects on microbial communities and related key ecological functions remain unclear.
S. Varrella, M. Tangherlini, C. Corinaldesi, L. Musco, A. Schirone, G. Armiento, R. Danovaro, A. Dell'Anno   +7 more
wiley   +1 more source

Limits on uranium and thorium bulk content in GERDA Phase I detectors

, 2016
Internal contaminations of $^{238}$U, $^{235}$U and $^{232}$Th in the bulk of high purity germanium detectors are potential backgrounds for experiments searching for neutrinoless double beta decay of $^{76}$Ge.
Agostini, M., Allardt, M., Bakalyarov, A. M., Balata, M., Barabanov, I., Baudis, L., Bauer, C., Becerici-Schmidt, N., Bellotti, E., Belogurov, S., Belyaev, S. T., Benato, G., Bettini, A., Bezrukov, L., Bode, T., Borowicz, D., Brudanin, V., Brugnera, R., Caldwell, A., Cattadori, C., Chernogorov, A., Csathy, J. Janicsko, D'Andrea, V., Demidova, E. V., di Vacri, A., Domula, A., Doroshkevich, E., Egorov, V., Falkenstein, R., Fedorova, O., Freund, K., Frodyma, N., Gangapshev, A., Garfagnini, A., GERDA collaboration, Grabmayr, P., Gurentsov, V., Gusev, K., Hakemüller, J., Hegai, A., Heisel, M., Hemmer, S., Hofmann, W., Hult, M., Inzhechik, L. V., Jochum, J., Junker, M., Kazalov, V., Kihm, T., Kirpichnikov, I. V., Kirsch, A., Kish, A., Klimenko, A., Kneißl, R., Knöpfle, K. T., Kochetov, O., Kornoukhov, V. N., Kuzminov, V. V., Laubenstein, M., Lazzaro, A., Lebedev, V. I., Lehnert, B., Liao, H. Y., Lindner, M., Lippi, I., Lubashevskiy, A., Lubsandorzhiev, B., Lutter, G., Macolino, C., Majorovits, B., Maneschg, W., Medinaceli, E., Mingazheva, R., Misiaszek, M., Moseev, P., Nemchenok, I., Palioselitis, D., Panas, K., Pandola, L., Pelczar, K., Pullia, A., Riboldi, S., Rumyantseva, N., Sada, C., Salamida, F., Salathe, M., Schmitt, C., Schneider, B., Schreiner, J., Schulz, O., Schwingenheuer, B., Schönert, S., Schütz, A. -K., Selivanenko, O., Shevchik, E., Shirchenko, M., Simgen, H., Smolnikov, A., Stanco, L., Stepaniuk, M., Vanhoefer, L., Vasenko, A. A., Veresnikova, A., von Sturm, K., Wagner, V., Walter, M., Wegmann, A., Wester, T., Wiesinger, C., Wojcik, M., Yanovich, E., Zhitnikov, I., Zhukov, S. V., Zinatulina, D., Zuber, K., Zuzel, G.   +115 more
core   +3 more sources

Radium isotopes quantify vertical mixing and reveal large benthic silicate fluxes in anoxic deep waters

Limnology and Oceanography, Volume 70, Issue 8, Page 2332-2347, August 2025.
Abstract Benthic fluxes are important sources of nutrients and dissolved carbon to the water column. Yet, most approaches for quantifying benthic fluxes are labor intensive and cover relatively small areas of the ocean. Here, we use 224Ra to quantify ecosystem‐scale vertical mixing across a largely hypoxic deep water column in the Baltic Sea and ...
Tristan McKenzie, Aprajita Singh Tomer, Tibaud Cardis, Claudia Majtényi‐Hill, Beata Szymczycha, Per O. J. Hall, Shibin Zhao, Stefano Bonaglia, Michael Ernst Böttcher, Isaac R. Santos   +9 more
wiley   +1 more source