Article
Environmental Sciences
David Blake, Mary C. Boyce, William D. Stock, Pierre Horwitz
Summary: This study found that fires can increase alkaline cation concentrations, oxidize sulfidic wetland sediments, generate acidic pore waters, and mobilize metal species. These changes are seasonal and can last for several years, depleting the buffering capacity of sediments.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Rahul C. Bhangare, Mahesh Tiwari, Puthiyaveettilparambu Yousuf Ajmal, Tejas D. Rathod, Sanjay K. Sahu
Summary: The COVID-19 pandemic has led to the global use of billions of face masks per day. While masks are important for controlling the pandemic, they also pose risks of inhalation of microplastics released from the mask materials. An experiment was conducted to estimate the amount of inhalable microplastics emitted from masks in a real-life usage scenario. The study involved collecting microplastics from the masks, staining and fluorescence detection, and estimation of the polymer type using spectroscopy.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geography, Physical
Shakura Jahan, Yang Wang, William C. Burnett, Guy H. Means, Fajun Sun
Summary: Organic geochemical proxies (OGPs) have been used to reconstruct hurricane records in coastal lake sediments, showing potential as reliable recorders of past storm activity. By examining the variation patterns of OGPs in coastal lakes, it is feasible to detect past storm events that caused seawater or freshwater flooding, providing a better understanding of storm dynamics in these environments.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Environmental Sciences
Yusuph A. Kafula, Eli S. J. Thore, Charlotte Philippe, Linus K. Munishi, Francis Moyo, Bram Vanschoenwinkel, Luc Brendonck
Summary: Environmental risks posed by widespread pesticide application have attracted global attention. Chemical risk assessments in aquatic environments typically rely on toxicity data from classic model species, but complementary data based on local species are needed for unusual living environments. This study conducted an environmental risk assessment of cypermethrin using local temporary pond species, and compared the results to those obtained using classic model species.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Benjamin Keenan, Anic Imfeld, Yves Gelinas, Peter M. J. Douglas
Summary: This study analyzed fecal stanol concentrations in lake surface sediments in Guatemala and the Yucatan Peninsula of Mexico, aiming to understand the geographical and biogeochemical variables controlling stanol concentrations and ratios in lake sediments in this region. The study found that the key factors influencing stanol concentrations are the proximity to human population centers and the human population within 5 km of the sampling point.
JOURNAL OF PALEOLIMNOLOGY
(2022)
Article
Geochemistry & Geophysics
Frederik Gaeng, Philipp Boening, Volker Bruchert, Niko Lahajnar, Katharina Pahnke
Summary: This study investigates the source and accumulation mechanisms of trace elements in sediments of the Namibian shelf and continental shelf anoxic zones. The results show that Zr is a sensitive tracer of dust input and/or sediment reworking, and the combination of Zr, organic matter, and P enrichments can differentiate different sediment environments. Uranium is mainly incorporated into apatite under oscillating oxic to sulfidic conditions, and its use as an indicator of suboxic conditions is questionable. The lithogenic fractions of Ba and Ni are found to be elevated, and their authigenic contents can be calculated to obtain more realistic values. Furthermore, the increase in the authigenic Ni/TOC ratio with sediment depth suggests better preservation and retention of Ni, supporting its use as a productivity indicator for upwelling sediments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Environmental Sciences
Faisal S. Boudala, Ismail Gultepe, Jason A. Milbrandt
Summary: Data from automated meteorological instruments are used for model validation and aviation applications, however, their measurement accuracy has not been fully tested. This study tested various ground-based instruments at Cold Lake Airport in Canada and found that visibility measured by FSPWs showed good correlation under different conditions, but there were quantization issues when compared to human observation.
Article
Engineering, Environmental
ShuaiLong Wen, YueHan Lu, ChunYan Luo, ShiLin An, JiaRu Dai, ZhengWen Liu, JiCheng Zhong, YingXun Du
Summary: This study investigates the interactions between humic acid (HA) and phosphate in the biogeochemical cycle of lakes. The results show that the functional groups of organic compounds not only control their fractionation and burial in sediments, but also their ability to replace phosphate. The study proposes a novel mechanism for the legacy effect of lake eutrophication, suggesting that increasing algae-derived organic compounds can promote the release of phosphate from sediments, sustaining internal phosphorus loading and lake eutrophication.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Analytical
Tamer Z. Attia, Huda H. Saied, Deena A. M. Nour El-Deen, Yaser M. Alahmadi, Mahmoud A. Omar
Summary: Two simple, rapid, and highly sensitive spectrofluorimetric methods were developed for nystatin determination, showing linear relationship within specified concentration ranges. The methods were based on nystatin's native fluorescence and micellar enhancement with SDS, demonstrating good precision and reproducibility in quantitative estimation of nystatin in pharmaceutical dosage forms. The statistical comparison with reported methods showed excellent agreement in terms of accuracy and precision.
Article
Geochemistry & Geophysics
Jifu Yin, Xiwu Zhan, Michael Barlage, Jicheng Liu, Huan Meng, Ralph R. Ferraro
Summary: This study proposes an optimal machine-learning model to refine the AMSR2 data product, and compares six commonly used machine-learning models. The XGB method is found to be more successful in preserving the reference data information compared to other models.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Spectroscopy
Nagayoshi Katsuta, Ayako Umemura, Sayuri Naito, Yuma Masuki, Yui Itayama, Masakazu Niwa, Sin-iti Sirono, Hidekazu Yoshida, Shin-ichi Kawakami
Summary: The study found that the intensity of Fe decreases with increasing grain size, but has a linear relationship with the composition of Fe2O3 if grain size remains constant. Experimental data agree well with theoretical curves, indicating that micro-beam XRF spectroscopy enables precise calibration for elements with narrow ranges of concentration and grain size. The theoretical curves for Lake Baikal sediment core show about a 30% maximum difference in Fe intensity within a specific grain size range.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Green & Sustainable Science & Technology
Shunmei Zhu, Ruping Peng, Xiaodong Wu, Xuguang Ge, Jiuyun Yang, Xiaowen Lin, Shuang Peng, Lan Feng, Nuoxi Wang
Summary: Based on UV-Vis absorption spectroscopy and three-dimensional fluorescence spectroscopy, the spatial distribution characteristics of dissolved organic matter (DOM) in sediments of Wuli Lake in the Taihu Lake basin were analyzed. The findings showed that the overall water quality of West Wuli Lake was better than that of East Wuli Lake, with higher water transparency and lower levels of suspended solids, total nitrogen, total phosphorus, and chlorophyll a. The distribution of a(350), M, and SR values of DOM in surface sediment differed across Wuli Lake, with a(350) values highest in the northwestern part and M and SR values highest in the eastern part. The biogenic index, humic index, and fluorescence index of surface sediments in Wuli Lake suggested a dual contribution of terrestrial and endogenous sources.
Article
Environmental Sciences
Gabriel Ricardo Cifuentes, Juan Jimenez-Millan, Claudia Patricia Quevedo, Antonio Galvez, Jose Castellanos-Rozo, Rosario Jimenez-Espinosa
Summary: The study explored the relationship between trace element concentration in sediments from Sochagota Lake and organic matter content, mineral composition, and bacterial communities activity. Different regions of the lake showed distinct characteristics in terms of element enrichment, suggesting the possible influence of sulfate-reducing bacteria in the precipitation of hydrothermal S and accumulation of trace elements. Additionally, sulfur-oxidizing bacterial communities may play a role in oxidizing previously precipitated sulfide and releasing metals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Guillaume Reboul, David Moreira, Nataliia V. Annenkova, Paola Bertolino, Konstantin E. Vershinin, Purificacion Lopez-Garcia
Summary: Lake Baikal, the deepest and most voluminous freshwater reservoir on Earth, harbors benthic microbial communities with high richness and evenness, showing distinctness from other freshwater, brackish, and marine sediment communities. The core benthic communities in Baikal are relatively stable across sites and not determined by depth or latitude. Additionally, adaptation to oligotrophy may explain the presence of marine lineages in Baikal sediments.
Article
Ecology
Guillaume Reboul, David Moreira, Nataliia V. Annenkova, Paola Bertolino, Konstantin E. Vershinin, Purificacion Lopez-Garcia
Summary: Lake Baikal is the deepest and most voluminous freshwater reservoir on Earth, with benthic microbial communities showing high richness and evenness. These communities include typically marine species and are relatively stable across sites, not influenced by depth or latitude. Comparative analyses with other sediment communities confirmed the distinctiveness of Baikal benthos.
Article
Geography, Physical
Malin E. Kylander, Anna Plikk, Johan Rydberg, Ludvig Lowemark, J. Sakari Salonen, Maria Fernandez-Fernandez, Karin Helmens
QUATERNARY RESEARCH
(2018)
Article
Geosciences, Multidisciplinary
Stefanie Kaboth-Bahr, Andre Bahr, Christian Zeeden, Samuel Toucanne, Frederique Eynaud, Francisco Jimenez-Espejo, Ursula Rohl, Oliver Friedrich, Joerg Pross, Ludvig Lowemark, Lucas J. Lourens
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Geography, Physical
A. Kremer, R. Stein, K. Fahl, Z. Ji, Z. Yang, S. Wiers, J. Matthiessen, M. Forwick, L. Lowemark, M. O'Regan, J. Chen, I. Snowball
QUATERNARY SCIENCE REVIEWS
(2018)
Article
Geography, Physical
Jyh-Jaan Steven Huang, Kuo-Yen Wei, Ludvig Lowemark, Sheng-Rong Song, Chih-Kai Chuang, Tien-Nan Yang, Meng-Yang Lee, Yu-Be Chen, Chorng-Shern Horng, Kuo-Hang Chen, Teh-Quei Lee
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Ludvig Lowemark, Menno Bloemsma, Ian Croudace, J. Stephen Daly, Robin J. Edwards, Pierre Francus, Jennifer M. Galloway, Braden R. B. Gregory, Jyh-Jaan Steven Huang, Anna F. Jones, Malin Kylander, Ludvig Lowemark, Yangbing Luo, Suzanne Maclachlan, Christian Ohlendorf, R. Timothy Patterson, Christof Pearce, Jorn Profe, Eduard G. Reinhardt, Christian Stranne, Rik Tjallingii, Jonathan N. Turner
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Stefanie Kaboth-Bahr, Vianney Denis, Chih-Chieh Su, Matt O'Regan, Richard Gyllencreutz, Martin Jakobsson, Ludvig Lowemark
QUATERNARY INTERNATIONAL
(2019)
Editorial Material
Geography, Physical
Ian W. Croudace, Ludvig Lowemark, Rik Tjallingii, Bernd Zolitschka
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Ian W. Croudace, Ludvig Lowemark, Rik Tjallingii, Bernd Zolitschka
QUATERNARY INTERNATIONAL
(2019)
Article
Multidisciplinary Sciences
Jyh-Jaan S. Teven Huang, Sheng-Chi Lin, Ludvig Lowemark, Sofia Ya Hsuan Liou, Queenie Chang, Tsun-Kuo Chang, Kuo-Yen Wei, Ian W. Croudace
SCIENTIFIC REPORTS
(2019)
Article
Geosciences, Multidisciplinary
Matt O'Regan, Helen K. Coxall, Thomas M. Cronin, Richard Gyllencreutz, Martin Jakobsson, Stefanie Kaboth, Ludvig Lowemark, Steffen Wiers, Gabriel West
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Multidisciplinary Sciences
Liangcheng Tan, Chuan-Chou Shen, Ludvig Lowemark, Sakonvan Chawchai, R. Lawrence Edwards, Yanjun Cai, Sebastian F. M. Breitenbach, Hai J. Cheng, Yu-Chen Chou, Helmut Duerrast, Judson W. Partin, Wenju Cai, Akkaneewut Chabangborn, Yongli Gao, Ola Kwiecien, Chung-Che Wu, Zhengguo Shi, Huang-Hsiung Hsu, Barbara Wohlfarth
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
Article
Geosciences, Multidisciplinary
Amy Hsieh, Shahin E. Dashtgard, Pei-Ling Wang, Chorng-Shern Horng, Chih-Chieh Su, Andrew T. Lin, Romain Vaucher, Ludvig Lowemark
Summary: The Taiwan Western Foreland Basin was traditionally believed to have received sediment mainly from Eurasia until the late Pliocene-early Pleistocene. However, new research indicates that major sediment contributions from Taiwan occurred much earlier, and were closely related to the uplift and initial emergence of the Taiwan orogen. This study demonstrates that the Taiwan orogen became a significant source of sediment to the Western Foreland Basin during the Miocene-Pliocene transition, about two million years earlier than previously recognized.
Article
Environmental Sciences
Tsai-Wen Lin, Stefanie Kaboth-Bahr, Andre Bahr, Kweku Afrifa Yamoah, Chih-Chieh Su, Liang-Chi Wang, Pei-Ling Wang, Ludvig Loewemark
Summary: Human activities have caused significant changes in sedimentation processes and vegetation cover in lake catchments. However, the time needed for anthropogenically disturbed areas to return to their natural state through environmental protection programs is still uncertain. This study focuses on the Cueifong Lake catchment in Taiwan and uses a multi-proxy approach to investigate major environmental disturbances such as logging and forest fires. The results suggest that it may take more than 50 years for the sedimentary regime to fully recover from logging activities, while the vegetation composition may shift irreversibly towards an algae-dominant environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Amy I. I. Hsieh, Romain Vaucher, Ludvig Lowemark, Shahin E. Dashtgard, Chorng-Shern Horng, Andrew T. T. Lin, Christian Zeeden
Summary: This study evaluates how the evolving Taiwan orogen influences the preservation of astronomical climate forcing in the shallow-marine sedimentary strata of the Taiwan Western Foreland Basin. The findings show that long-term astronomical cycles were poorly preserved during the early stages of increased East Asian Summer Monsoon due to wave reworking. However, from 5.4 to 3.15 Ma, the development of the basin and the protection provided by Taiwan enhanced the preservation of astronomical climate variability.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2023)
Article
Geology
Romain Vaucher, Antoine Dillinger, Amy I. Hsieh, Wen-Rong Chi, Ludvig Lowemark, Shahin E. Dashtgard
Summary: This paper reports on the sedimentary succession of the Pleistocene Cholan Formation in Taiwan, which provides insights into the deposition processes of storm-flood delta successions. The study reveals the occurrence of tropical cyclone beds and post-depositional deformation features, and highlights the differences in sedimentary structures compared to other storm-flood delta successions.
DEPOSITIONAL RECORD
(2023)
