Article
Biodiversity Conservation
Zhongjing Cheng, Chengyu Weng, Stephan Steinke, Mahyar Mohtadi
Summary: The study utilized pollen data from a deep-sea sedimentary record in the northern South China Sea to explore the historical behavior of coastal wetlands over the past 140,000 years. The research found a close link between sea-level rise and the expansion of coastal salt marshes, indicating a certain resilience of coastal wetlands to future sea-level rise.
ECOLOGICAL INDICATORS
(2021)
Article
Geochemistry & Geophysics
Jocelyn A. Sessa, Andrew J. Fraass, Leah J. LeVay, Katie M. Jamson, Shanan E. Peters
Summary: For over 50 years, cores recovered from ocean basins have generated fossil, lithologic, and chemical archives that have revolutionized fields within the earth sciences. Emphasis on FAIR Data Principles and community-led databases provide a pathway to unite SOD data and harness the scientific potential of offshore drilling investments. A workflow for compiling, cleaning, and standardizing key SOD records has been established, and the compiled data set is available through GitHub and Macrostrat, offering versatile data retrieval options.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
Aaron Bagnell, Tim DeVries
Summary: Global sea level rise is primarily caused by heating of the ocean and the input of freshwater from melting ice. This study shows that trends in sea level rise can also be accurately tracked by observing changes in ocean salinity. The results highlight the importance of measuring ocean salinity for monitoring global sea level changes.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Marine
Edward J. Anthony, Manon Besset, Florin Zainescu, Francois Sabatier
Summary: Determining changes in land and water areas over river deltas based on land-water ratios can help identify subsidence and shoreline erosion, and provide a foundation for studying land-cover and vegetation variations. The spatial pattern of most Mediterranean and Black Sea river deltas is largely characterized by increasing water areas, reflecting a mix of shoreline erosion, land-use changes, and subsidence. Future research should focus on detailed studies of each delta to unravel changes related to land-use, vegetation, and subsidence, as well as the interpretation of wetlands in these ratios.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Geology
Daniel Lizarralde, Andreas Teske, Tobias W. Hofig, Antonio Gonzalez-Fernandez
Summary: The intrusion of igneous sills into organic-rich sediments leads to the release of carbon, including methane, which can impact global climate. However, the direct impacts of sill intrusion and carbon release remain insufficiently understood. A recent study in Guaymas Basin, Gulf of California, estimated that 3.30 Mt of carbon were released due to a sill intrusion, which is an order of magnitude less than predicted by previous studies. This attenuated carbon release is attributed to shallow intrusion and young, high-porosity sediments.
Article
Geosciences, Multidisciplinary
Tangdong Qu, Oleg Melnichenko
Summary: This study quantitatively assesses the steric changes associated with sea level rise in the upper South Indian Ocean (SIO) from 1993-2017, using the latest ocean state estimate and in-situ observations. The results show that the sea level rise in the low-latitude SIO is faster than the South Pacific and South Atlantic counterparts. The fast sea level rise is mainly attributed to warming and freshening of the upper ocean, with little contribution from the deeper layers.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
T. A. O. WANG, W. E. N. S. H. O. U. TIAN, T. A. O. LIAN, C. H. E. N. G. SUN, F. E. I. XIE, J. I. A. N. K. A. I. ZHANG, Q. I. N. G. Q. I. N. G. YIN
Summary: This study investigates the changes in the meridional position of North Pacific sea surface temperature anomalies (SSTAs) associated with the interannual component of the principal component 1. The results show that the SSTAs have significantly shifted southward at a rate of 1.04 degrees latitude per decade since the 1960s.
JOURNAL OF CLIMATE
(2022)
Review
Astronomy & Astrophysics
Andrew S. Cohen, Christopher J. Campisano, J. Ramon Arrowsmith, Asfawossen Asrat, Catherine C. Beck, Anna K. Behrensmeyer, Alan L. Deino, Craig S. Feibel, Verena Foerster, John D. Kingston, Henry F. Lamb, Tim K. Lowenstein, Rachel L. Lupien, Veronica Muiruri, Daniel O. Olago, R. Bernhart Owen, Richard Potts, James M. Russell, Frank Schaebitz, Jeffery R. Stone, Martin H. Trauth, Chad L. Yost
Summary: This article reviews the valuable data obtained through drill-core studies of lacustrine sedimentary rocks in eastern Africa, highlighting the importance of understanding the role of environmental change in shaping human evolution. The proposed drilling of Africa's oldest lakes is crucial for gaining a comprehensive paleoenvironmental context for the entire late Neogene history of hominin evolution.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES
(2022)
Article
Meteorology & Atmospheric Sciences
Yi Jin, Xuebin Zhang, John A. Church, Xianwen Bao
Summary: A high-resolution regional ocean model was developed to simulate historical and future sea level changes near China, providing more detailed spatial information compared to GCMs. The study demonstrates a useful downscaling method for modeling future oceanic climate changes for adaptation and mitigation planning.
JOURNAL OF CLIMATE
(2021)
Article
Environmental Sciences
Christopher Barrell, Ian A. Renfrew, John C. King, Steven J. Abel, Andrew D. Elvidge
Summary: In winter over the subpolar North Atlantic Ocean, the strongest heat exchange between the ocean and the air occurs near the sea-ice edge. The retreat of Arctic sea ice is changing the distribution of heat exchange, affecting the formation of dense waters and the Atlantic Meridional Overturning Circulation. Climate model simulations show that future projections indicate a reduction in winter sea ice and air-sea heat fluxes, particularly in certain regions of the North Atlantic, with more severe impacts under high emissions scenarios.
Article
Geosciences, Multidisciplinary
B. Thompson, S. Jevrejeva, J. Zachariah, D. G. Faller, P. Tkalich
Summary: This study investigates long-term sea level changes in the South China Sea using a validated regional ocean model simulation. The study finds that ocean mass redistribution and steric sea level are important factors contributing to sea level variations. The results show that ocean bottom pressure and steric sea level play significant roles in sea level changes, and steric sea level dominates the variations in the deep South China Sea.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Shuhui Zhao, Jinpei Yan, Qi Lin, Lei Yao, Keyhong Park, Jinyoung Jung, Liqi Chen, Suqing Xu, Meiping Sun, Shanshan Wang, Hang Yang, Jun Shi, Miming Zhang, Heng Sun
Summary: The changes of water soluble ions in aerosol particles during sea fog events were studied. Sea salt ions increased before the occurrence of fog and decreased substantially after fog formation, while non-sea salt sulfate ions remained high during the fog processes. Sea salt particles were more likely to serve as condensation nuclei for fog and could be more effectively removed by sea fog than non-sea salt sulfate particles.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Engineering, Marine
Poh Heng Kok, Sarath Wijeratne, Mohd Fadzil Akhir, Charitha Pattiaratchi, Nur Hidayah Roseli, Fariz Syafiq Mohamad Ali
Summary: This study investigates the interconnection between the southern South China Sea and Java Sea by simulating seasonal circulations and associated transports. The results show significant water exchanges between the two seas in winter and summer, with the direction of water transport correlating with changes in water temperature and salinity. The ROMS estimates peak water transports in May, attributed to the simulated anticyclonic eddy in the southern South China Sea.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Review
Multidisciplinary Sciences
Philip L. Woodworth
Summary: This paper reviews the measurement and understanding of changes in sea level and tides, focusing on the past century. It highlights the close connection between sea level and tidal science with the fields of climate change and geodesy.
ANNALS OF THE NEW YORK ACADEMY OF SCIENCES
(2022)
Article
Environmental Sciences
Afeng Chen, Xiaoguo Wu, Staci L. Massey Simonich, Hui Kang, Zhouqing Xie
Summary: The study found that the concentrations of PAHs in air and water over the North Pacific Ocean and Arctic Ocean showed a decreasing trend with latitude, and were likely related to sources such as volatilization, coal and fuel oil combustion, and biomass burning. Additionally, 3-ring PAHs in the Arctic region were strongly dominated by net volatilization, while 4-ring PAHs underwent net deposition during the cruise.
ENVIRONMENTAL POLLUTION
(2021)
Review
Geosciences, Multidisciplinary
Yusuke Yokoyama, Anthony Purcell
Summary: Past sea-level change is a reflection of global climate and the waxing and waning of global ice sheets. Recent advances in methods allow for a more precise reconstruction of past sea-level changes. However, geophysical factors such as glacio-hydro-isostatic adjustments need to be taken into account when interpreting observations of local, relative sea-level change.
GEOSCIENCE LETTERS
(2021)
Article
Geography, Physical
Takeshige Ishiwa, Yusuke Yokoyama, Stephen Obrochta, Katsuto Uehara, Jun'ichi Okuno, Minoru Ikehara, Yosuke Miyairi
Summary: This study presents radiocarbon dating conducted in the Bonaparte Gulf in northwestern Australia, showing significant influence of sea level changes on past depositional environment, and differing reliability of carbonate fossils and acid-insoluble carbon at different sea levels.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
S. Allgeyer, P. Tregoning, H. McQueen, S. C. McClusky, E. -K. Potter, J. Pfeffer, R. McGirr, A. P. Purcell, T. A. Herring, J. -P. Montillet
Summary: This study investigates different basis functions to estimate mass variations on Earth using data from the GRACE and GRACE-FO missions. It finds that using range acceleration as an observable helps localize mass variations. The study also demonstrates a method to generate range acceleration observations from range rate data. The monthly estimates of mass anomalies agree well with previous studies.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
P. Tregoning, R. McGirr, J. Pfeffer, A. Purcell, H. McQueen, S. Allgeyer, S. C. McClusky
Summary: The estimation of mass anomalies using GRACE data involves parameterizing the temporal gravity field using basis functions. This study shows that irregularly shaped mascon tiles that follow land/ocean boundaries can reduce signal leakage, improving the accuracy of estimates. Efficient algorithms are described for calculating accelerations caused by mass changes and their derivatives. The intra-mascon variability contributes to errors in mass change estimates, but using irregularly shaped mascons can mitigate this.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Multidisciplinary Sciences
Adam D. Sproson, Yusuke Yokoyama, Yosuke Miyairi, Takahiro Aze, Rebecca L. Totten
Summary: The ice loss in the Amundsen Sea sector of West Antarctica is accelerating rapidly. This study reveals that this region also experienced thinning and retreat from 9 to 6 thousand years ago, which was caused by atmospheric connections with a warming tropical Pacific. Understanding the processes responsible for ice mass loss is crucial for predicting sea-level rise.
NATURE COMMUNICATIONS
(2022)
Article
Geochemistry & Geophysics
Ryo Nakanishi, Juichiro Ashi, Yosuke Miyairi, Yusuke Yokoyama
Summary: By investigating tsunami deposits in a coastal wetland of southeastern Hokkaido, Japan, this study reveals the history and extents of tsunamis generated by the Kuril Trench over the last 4,000 years, providing a framework for magnitude estimations and long-term forecasts of earthquakes.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Instruments & Instrumentation
Shigeyoshi Otosaka, Hyunduck Jeon, Yunxuan Hou, Takahiro Watanabe, Takahiro Aze, Yosuke Miyairi, Yusuke Yokoyama, Hiroshi Ogawa
Summary: A safer and easier method for analyzing DOC-14C in seawater was developed in this study, which introduced the use of a low-pressure mercury lamp for direct decomposition of organic matter. This method can not only be used for C-14 isotope ratio analysis, but also for analyzing various other dissolved organic elements/ isotopes.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2022)
Letter
Multidisciplinary Sciences
Yusuke Yokoyama, Kurt Lambeck, Patrick De Deckker, Tezer M. Esat, Jody M. Webster, Masao Nakada
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
Maximilian Hallenberger, Lars Reuning, Hideko Takayanagi, Yasufumi Iryu, Nina Keul, Takeshige Ishiwa, Yusuke Yokoyama
Summary: There is growing interest in using pteropods as archives of past changes in ocean chemistry. This study obtained core data from the Northwest Shelf of Australia to assess changes in carbonate saturation state using pteropod species Heliconoides inflatus. The findings indicate that H. inflatus calcifies at a depth of 95-140 m, confirming its accuracy in recording shallow-marine signals. The study also found a notable decrease in carbonate ion concentrations after 8.5 ka, associated with post-glacial humid conditions on the Northwest Shelf.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2022)
Article
Instruments & Instrumentation
Yuning Zeng, Yusuke Yokoyama, Shoko Hirabayashi, Yosuke Miyairi, Atsushi Suzuki, Takahiro Aze, Yuta Kawakubo
Summary: A new method combining coral growth band counting and Sr/Ca measurement using ICP-AES was proposed to establish a high-resolution age model. The study demonstrated the feasibility of using Sr/Ca for age modeling in coral and the ability of ICP-AES to provide higher-resolution data.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2022)
Article
Instruments & Instrumentation
Yusuke Yokoyama, Yosuke Miyairi, Takahiro Aze, Chikako Sawada, Yuka Ando, Satomi Izawa, Yoshiko Ueno, Shoko Hirabayashi, Naoto Fukuyo, Kosuke Ota, Yusuke Shimizu, Yuning Zeng, Hui Lan, Ren Tsuneoka, Kozue Ando, Karin Nemoto, Stephen Obrochta, Bethany Behrens, Evan Tam, Kai Leggett, Jian Rzeszewicz, Zihan Huang, Reisuke Kondo, Toshi Nagata
Summary: A single stage Accelerator Mass Spectrometer (YS-AMS) at the Atmosphere and Ocean Research Institute (AORI), University of Tokyo has been operating smoothly since 2013, with an average annual operation time of over 8000 hours. A newly developed automated system has dramatically increased the throughput, allowing for the measurement of 16,000 samples to date. The improved operation software and increased number of standards measured per run have resulted in a 14C/12C measurement precision on standard material of better than 0.1%. The results have enhanced geochronological information for paleoenvironmental, biological, and geohazard studies.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2022)
Article
Multidisciplinary Sciences
Kaoru Kubota, Rosaaideihn Tanabe, Minoru Ikehara, Yukiko Kozaka, Koji Seike, Yosuke Miyairi, Yusuke Yokoyama
Summary: This article describes the use of geochemical data to determine the age model of marine sediment cores collected from Agulhas Ridge in the South Atlantic Ocean. The dataset includes radiocarbon ages of planktonic foraminifera shells and oxygen isotopes of both planktonic and benthic foraminifera shells. The results show that the 7.5 kyr record is lost, the age below 3.27 meters is around 140 kyr ago, and the sedimentation rates range from 0.9 to 5.5 kyr/cm.
Article
Instruments & Instrumentation
Yusuke Shimizu, Yosuke Miyairi, Yusuke Yokoyama
Summary: This study developed an in situ 14C extraction system for extracting in situ 14C from quartz. After improving the design, the system showed low background noise and high extraction efficiency, making it capable of extracting in situ 14C for surface exposure dating.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Instruments & Instrumentation
Kosuke Ota, Yusuke Yokoyama, Yosuke Miyairi, Shinya Yamamoto, Yunyi Wang, Toshihiro Miyajima
Summary: In this study, the 14C concentration of Lake Kawaguchi was investigated over three years, and a 14C box model was used to estimate groundwater contribution. The results showed seasonal variations in Delta 14C, with a decrease from summer to fall and an increase during winter. Heavy precipitation from Typhoon#19 significantly increased Delta 14C in the lake for one month, potentially due to changes in surface water pathway. The 14C box model demonstrated the potential for semi-quantitatively evaluating groundwater flow in the lake, but further quantitative evaluations of river inflow and other factors are needed to fully understand groundwater dynamics.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2023)
Article
Environmental Sciences
Yusuke Suganuma, Heitaro Kaneda, Martim Mas E. Braga, Takeshige Ishiwa, Takushi Koyama, Jennifer C. Newall, Jun'ichi Okuno, Takashi Obase, Fuyuki Saito, Irina Rogozhina, Jane Lund Andersen, Moto Kawamata, Motohiro Hirabayashi, Nathaniel A. Lifton, Ola Fredin, Jonathan M. Harbor, Arjen P. Stroeven, Ayako Abe-Ouchi
Summary: This study suggests that a regional sea-level highstand triggered rapid thinning of the East Antarctic Ice Sheet during the Holocene. The findings provide important geological records for ice sheet changes and sea-level rise, and contribute to model validation.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
