Article
Environmental Sciences
Julia A. Guimond, Cansu Demir, Barret L. Kurylyk, Michelle A. Walvoord, James W. Mcclelland, M. Bayani Cardenas
Summary: Groundwater discharge to the ocean along Arctic coastlines plays a significant role in carbon budgets and water quality. This study investigates the magnitude and drivers of groundwater discharge to Alaska's Beaufort Sea coast using unique coastal Arctic groundwater timeseries data. The results reveal temporally variable groundwater fluxes driven by wind-driven lagoon water level changes, with implications for nearshore biogeochemistry.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Xiaolong Geng, Holly A. Michael
Summary: The study highlights the significant role of three-dimensional groundwater movement in heterogeneous coastal aquifers, especially in systems with connected high-permeability geological features. Three-dimensional flowpaths and travel times are longer compared to two-dimensional in onshore areas, but shorter offshore, particularly in conduit-type models with highly preferential flow. Flowpath lengths and travel times vary greatly in three-dimensional simulations compared to two-dimensional across all heterogeneous systems.
WATER RESOURCES RESEARCH
(2021)
Article
Geochemistry & Geophysics
Celine Charbonnier, Pierre Anschutz, Gwenael Abril, Alfonso Mucci, Loris Deirmendjian, Dominique Poirier, Stephane Bujan, Pascal Lecroart
Summary: High-energy tidal beaches play a significant role in regulating biogeochemical cycles in coastal zones by exporting dissolved carbon, some of which originates from the aerobic respiration of marine organic matter within the beach aquifer. This discharge acts as a buffer against ocean acidification and contributes significantly to the coastal carbon budget, underscoring the importance of studying and understanding these processes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Daniel R. Muhs
Summary: This passage mainly introduces the records of MIS 5e coastal terraces and coral reef terraces along the Pacific coast of North America, as well as the results of related chronostratigraphic studies. The shoreline angle is the primary indicator of paleo-sea level during MIS 5e, and chronology is determined mainly through uranium-series ages and amino acid ratios. The passage also mentions that sea surface temperatures were higher during MIS 5e compared to present, and there was no wholesale shift in faunal provinces. The tectonic activity in the region and the glacial isostatic adjustment processes contributed to the high sea stands during MIS 5e. Additionally, it introduces the records of earlier interglacial periods and the cooling trend during MIS 5a.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Janardhana Raju Nandimandalam, Krati Sharma, Ramanathan Alagappan
Summary: This study used a three-tier validation system to identify submarine groundwater discharge (SGD) and saline water intrusion (SWI) zones along the southeast coast of Andhra Pradesh, India. The results showed that three out of four districts studied were prone to SWI, while one district was susceptible to SGD. This preliminary study provides a basis for further analysis and management of groundwater resources in the water-stressed coastal plains of Andhra Pradesh.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Chandrashekhar Bhagat, Ashwini Khandekar, Ashwin Singh, Pranab Kumar Mohapatra, Manish Kumar
Summary: This study delineated the potential areas of seawater intrusion and submarine groundwater discharge along the entire coastline of Gujarat, India, providing a preliminary basis for the water crisis caused by freshwater salinization and water loss.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Mintu Elezebath George, T. Akhil, R. Remya, M. K. Rafeeque, D. S. Suresh Babu
Summary: Research on nutrient discharge associated with submarine groundwater discharge (SGD) in the Arabian Sea along the southwest coast of India revealed significant nutrient delivery into the sea, attributed to land-use practices like agricultural activities and improper waste disposal. High nutrient flux through SGD can lead to phytoplankton bloom and coastal hypoxia, emphasizing the importance of understanding and maintaining a sustainable ecological balance in the region.
MARINE POLLUTION BULLETIN
(2021)
Review
Geosciences, Multidisciplinary
Magdalena Diak, Michael Ernst Boettcher, Catia Milene Ehlert von Ahn, Wei-Li Hong, Monika Kedra, Lech Kotwicki, Katarzyna Koziorowska-Makuch, Karol Kulinski, Aivo Lepland, Przemyslaw Makuch, Arunima Sen, Aleksandra Winogradow, Marc Juergen Silberberger, Beata Szymczycha
Summary: This study reviews the interactions between permafrost and groundwater, with a focus on recharge and discharge in the Arctic and the Qinghai-Tibet Plateau. It found that the geochemical composition of groundwater is site-specific and varies within aquifers, reflecting water-rock interactions. The study also observed that permafrost thaw increases groundwater discharge on land, and climate warming is likely to accelerate permafrost degradation and enhance hydrological connectivity. With regards to submarine groundwater discharge, the impact of permafrost thaw can either reinforce or reduce it, depending on the changes in aquifer pressure. The study highlights the need for long-term interdisciplinary in situ measurements for accurate predictions of groundwater flow and permafrost dynamics in a warmer climate.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Ecology
Poornima Unnikrishnan, Reji Srinivas, Murugan Ramasamy, D. S. Suresh Babu
Summary: The study investigated submarine groundwater discharge and its behavior influenced by coastal geomorphology and geology. Numerical models were developed to estimate the magnitude of SGD from different catchments on the Southwest coast of India. The results showed significant differences in SGD flux between catchments, with potential implications for designing aquifer recharge options and optimum pumping quantities.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Geochemistry & Geophysics
Karri Damodararao, Sunil Kumar Singh
Summary: The concentration and isotopic compositions of dissolved Sr in four major estuaries of the east coast of India were measured, and it was found that dissolved Sr displayed conservative behavior while Sr isotopic composition behaved non-conservatively. The study also revealed that submarine groundwater discharge is an important source of Sr in these estuaries and can be used to estimate groundwater contribution to the water budget.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Oceanography
L. M. Hernandez-Terrones, J. Street, K. Null, A. Paytan
Summary: Measurements of radiogenic strontium isotopic ratios and solute concentrations in groundwater samples from the eastern coastal area of Quintana Roo, Mexico were used to assess connectivity and water-rock interactions within different groundwater systems in the region. Three distinct groundwater systems were identified: Cancun-Puerto Morelos in the north, Tulum-Sian Ka' an in the center, and Xcalak in the south. Water-rock interactions within each aquifer system include dissolution of evaporites, precipitation of carbonate, sulfate reduction, and mixing with seawater, highlighting the importance of groundwater chemistry in understanding connectivity and potential anthropogenic impacts on groundwater quality and coastal ecosystems.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Environmental Sciences
Chandrashekhar Bhagat, Pranab Kumar Mohapatra, Manish Kumar
Summary: The study reveals that the Gujarat coastal region is facing water crises and aquifer salinization issues, with seawater intrusion heavily influencing groundwater quality and a probability of submarine groundwater discharge. Recommendations include the feasibility of check dams as a remedial measure to control coastal aquifer salinization.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Xuan Yu, Holly A. Michael
Summary: Numerical models of variable-density groundwater flow and salt transport are crucial for predicting salinity distributions in coastal aquifers and estimating submarine groundwater discharge. The study found that the scale of representation of heterogeneity significantly impacts salinity distributions and flow paths, and simulated density distributions control both the rate and direction of subsurface saltwater circulation.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Zhenyang Li, Feng Pan, Kai Xiao, Hailong Li, Chunmiao Zheng, Xuejing Wang, Yan Zhang, Qianqian Wang, Licong Zhang
Summary: This study investigated the spatiotemporal patterns of groundwater heavy metals and the driving mechanism in a subtropical mangrove wetland in China. The results showed that the distribution of heavy metals varied seasonally along the transect, influenced by factors such as seawater-groundwater interactions, vegetation zonation, biogeochemical reactions, and anthropogenic activities. This research contributes to a better understanding of heavy metal behaviors in mangrove groundwater for sustainable management of mangrove wetlands.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Martin A. Briggs, Julia A. Cantelon, Barret L. Kurylyk, Justin T. Kulongoski, Audrey Mills, John W. Lane
Summary: Freshwater lenses beneath small ocean islands show spatial variability and temporal fluctuations, influenced by factors such as groundwater salinization and geological changes. Study on Palmyra Atoll reveals significant contraction of freshwater lens volume during dry cycles, posing threats to ecosystem management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Limnology
Xiangming Shi, Claudia R. Benitez-Nelson, Pinghe Cai, Lijian He, Willard S. Moore
LIMNOLOGY AND OCEANOGRAPHY
(2019)
Article
Oceanography
Lauren E. Kipp, David C. Kadko, Robert S. Pickart, Paul B. Henderson, Willard S. Moore, Matthew A. Charette
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Oceanography
Matthew A. Charette, Lauren E. Kipp, Laramie T. Jensen, Jessica S. Dabrowski, Laura M. Whitmore, Jessica N. Fitzsimmons, Tatiana Williford, Adam Ulfsbo, Elizabeth Jones, Randelle M. Bundy, Sebastian M. Vivancos, Katharina Pahnke, Seth G. John, Yang Xiang, Mariko Hatta, Mariia Petrova, LarsEric Heimburger-Boavida, Dorothea Bauch, Robert Newton, Angelica Pasqualini, Alison M. Agather, Rainer M. W. Amon, Robert F. Anderson, Per S. Andersson, Ronald Benner, Katlin L. Bowman, R. Lawrence Edwards, Sandra Gdaniec, Loes J. A. Gerringa, Aridane G. Gonzalez, Mats Granskog, Brian Haley, Chad R. Hammerschmidt, Dennis A. Hansell, Paul B. Henderson, David C. Kadko, Karl Kaiser, Patrick Laan, Phoebe J. Lam, Carl H. Lamborg, Martin Levier, Xianglei Li, Andrew R. Margolin, Chris Measures, Rob Middag, Frank J. Millero, Willard S. Moore, Ronja Paffrath, Hlne Planquette, Benjamin Rabe, Heather Reader, Robert Rember, Micha J. A. Rijkenberg, Matthieu Roy-Barman, Michiel Rutgers van der Loeff, Mak Saito, Ursula Schauer, Peter Schlosser, Robert M. Sherrell, Alan M. Shiller, Hans Slagter, Jeroen E. Sonke, Colin Stedmon, Ryan J. Woosley, Ole Valk, Jan van Ooijen, Ruifeng Zhang
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Oceanography
L. E. Kipp, M. A. Spall, R. S. Pickart, D. C. Kadko, W. S. Moore, J. S. Dabrowski, M. A. Charette
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2020)
Article
Environmental Sciences
C. A. Schutte, W. S. Moore, A. M. Wilson, S. B. Joye
GLOBAL BIOGEOCHEMICAL CYCLES
(2020)
Article
Environmental Sciences
Camaron George, Willard S. Moore, Scott M. White, Erin Smoak, Samantha B. Joye, Andrew Leier, Alicia M. Wilson
WATER RESOURCES RESEARCH
(2020)
Review
Geosciences, Multidisciplinary
Willard S. Moore, Samantha B. Joye
Summary: Saltwater intrusion into freshwater coastal aquifers is a global issue caused by over-pumping of freshwater and sea level rise. This intrusion impacts drinking water, agriculture, industry, and alters the biogeochemistry of subterranean estuaries, resulting in the release of nutrient-rich groundwater into the ocean. Climate change exacerbates sea level variations, potentially increasing saltwater intrusion and promoting biological productivity, but also posing risks to the environment and local ecology.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Virginie Sanial, Willard S. Moore, Alan M. Shiller
Summary: This study examines the potential impact of submarine groundwater discharge (SGD) on seasonal hypoxia in the Mississippi Bight biogeochemical system and suggests that SGD may be a significant source of nutrients for bottom waters in the area.
Review
Geochemistry & Geophysics
Pei Xin, Alicia Wilson, Chengji Shen, Zhenming Ge, Kevan B. Moffett, Isaac R. Santos, Xiaogang Chen, Xinghua Xu, Yvonne Y. Y. Yau, Willard Moore, Ling Li, D. A. Barry
Summary: Salt marshes are important ecosystems that provide essential ecological services, but they have been lost globally due to human activities and climate change. The interactions between tidal water and groundwater in salt marshes affect plant growth and biogeochemical exchange with coastal water. However, there are still significant knowledge gaps regarding the hydrological and ecological links in salt marshes and the challenges they face.
REVIEWS OF GEOPHYSICS
(2022)
Article
Oceanography
W. S. Moore, J. D. Frankle, C. R. Benitez-Nelson, G. L. Frueh-Green, S. Q. Lang
Summary: Research on fluids circulating through serpentinite-hosted systems discovered significantly higher Ra-223 activities than in basalt-hosted systems, suggesting shorter residence times of less than 2 years. Despite differences in rock types, porosity, and heat sources, hydrothermal systems share similar hydrogeological characteristics, enabling larger-scale models of biogeochemistry to be developed across systems.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Limnology
Morgane Leon, Pieter van Beek, Jan Scholten, Willard S. Moore, Marc Souhaut, Joselene De Oliveira, Catherine Jeandel, Patrick Seyler, Julien Jouanno
Summary: The study investigates the release of radium isotopes when rivers mix into the ocean and analyzes their activities. The residence time of Amazon waters on the Brazilian continental shelf is found to be primarily driven by the surrounding currents, independent of the discharge rate of the Amazon River.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Correction
Chemistry, Multidisciplinary
Lauren E. Kipp, Matthew A. Charette, Douglas E. Hammond, Willard S. Moore
Article
Chemistry, Multidisciplinary
Nathaniel Kemnitz, Douglas E. Hammond, Paul Henderson, Emilie Le Roy, Matthew Charette, Willard Moore, Robert F. Anderson, Martin Q. Fleisher, Anne Leal, Erin Black, Christopher T. Hayes, Jess Adkins, William Berelson, Xiaopeng Bian
Summary: In August 2017, five sediment cores were collected along a cruise tract from Hawaii to Alaska to study the behavior and fluxes of Ac-227, Ra-228, and Ra-226. The study found that the sediment fluxes of Ac-227 and Ra-228 are relatively large in the Northeast Pacific. However, the sediment flux of Ra-226 is relatively small in this region, indicating the significant lateral export of Ra-226 from the North Pacific.
Article
Oceanography
Emma J. Bullock, Lauren Kipp, Willard Moore, Kristina Brown, Paul J. Mann, Jorien E. Vonk, Nikita Zimov, Matthew A. Charette
Summary: This study quantifies the river radium inputs into the Arctic Ocean for the first time and improves the estimates for this region. Through lab experiments and data from major rivers around the world, it is found that rivers are an important source of radium to the Arctic Ocean. Understanding river radium inputs is crucial for studying changes in biogeochemically important element fluxes as climate change and Arctic warming continue.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
Willard S. Moore, Jacob Vincent, James L. Pickney, Alicia M. Wilson
Summary: This study reveals that submarine groundwater discharge (SGD) can directly affect the dissolved oxygen (DO) content in coastal bottom waters. The researchers developed a prediction model that linked episodes of enhanced SGD to upwelling-favorable winds. The data showed that these water masses had higher Ra-226 and Ra-228 values compared to typical bottom water, and were significantly depleted in DO. The successful prediction using wind data represents a major advancement in quantifying SGD in the region.
GEOPHYSICAL RESEARCH LETTERS
(2022)