Article
Geography, Physical
Jan Bouke Pronk, Tobias Bolch, Owen King, Bert Wouters, Douglas Benn
Summary: Melting water from Himalayan glaciers sustains the flow of rivers such as the Ganges and Brahmaputra, but these glaciers are expected to be substantially impacted by climate change in the coming decades. Glaciers terminating into proglacial lakes exhibit higher total mass losses, but the mechanisms driving this ice loss in the Himalayas are not well understood yet. Ice-flow model experiments suggest that changes in the force balance at glacier termini are likely to play a key role in accelerating glacier flow in the region.
Article
Oceanography
A. E. Stuart-Lee, J. Mortensen, A. S. van der Kaaden, L. Meire
Summary: The study focuses on the seasonal hydrography of Ameralik, a Greenlandic fjord impacted by a land-terminating glacier. The absence of subglacial discharge and glacial ice in Ameralik significantly affects the inner fjord density profiles and circulation. During the summer, a large fraction of meltwater is retained within the fjord, while substantial freshwater export occurs during winter coastal inflows.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Environmental Sciences
Zhan Yan, Tong Zhang, Yuzhe Wang, Wei Leng, Minghu Ding, Dongqi Zhang, Cunde Xiao
Summary: By simulating the future ice thickness evolution of Jiemayangzong Glacier using a numerical flowline model, we found that the glacier will retreat in the future. We estimated the volume loss of the glacier under different climate scenarios.
Editorial Material
Environmental Sciences
Jon R. Hawkings
Summary: Glaciers play an important role in polar nutrient cycling, with marine-terminating glaciers in the Canadian Arctic Archipelago pumping nutrient-rich marine waters into the euphotic zone through shallow meltwater.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Engineering, Civil
S. Brighenti, M. Engel, R. Dinale, W. Tirler, G. Voto, F. Comiti
Summary: Glaciers and rock glaciers play important roles in mountain hydrological systems, but their effects on the chemical and isotopic conditions of streams have been overlooked. This study examined stream sections in two catchments in the Italian Alps and found that different water sources contribute to stream runoff. Snowmelt and rainwater were the largest and smallest components, respectively, while ice melt was significant in streams fed by glaciers and rock glaciers. The presence of rock glaciers can complicate the isotopic and chemical signatures of glaciers, making hydrograph separation challenging.
JOURNAL OF HYDROLOGY
(2023)
Article
Geography, Physical
John Erich Christian, Alexander A. Robel, Ginny Catania
Summary: Many marine-terminating outlet glaciers have been rapidly retreating in recent years, but it is still unclear whether this is due to anthropogenic climate change or natural climate variability. A study using simulations of idealized glaciers suggests that rapid retreat is a stochastic phenomenon in a noisy climate. They propose a probabilistic approach to attribution and provide a framework for analysis using ensembles of simulations with random climate variability. The study shows that century-scale climate trends increase the likelihood of rapid glacier retreat. This research emphasizes the importance of further pursuing formal attribution studies to understand the human role in recent ice-sheet changes.
Article
Water Resources
Edisson Cepeda Arias, Julio Canon Barriga, Juan F. Salazar
Summary: This study analyzes the period of hydrologic transition in the Sierra Nevada del Cocuy watershed in Colombia from 1956 to 2020. The research shows that continuous glacier shrinkage, highly variable precipitation regimes, and increasing human activities have altered the watershed's capacity to regulate high, low, and mean flows. This alteration has become noticeable since the 2000s, with local communities depending unsustainably on the shrinking glacier for water resources, potentially leading to usage restrictions and major implications for water security in the future.
HYDROLOGICAL SCIENCES JOURNAL
(2022)
Article
Geography, Physical
Masahiro Minowa, Marius Schaefer, Pedro Skvarca
Summary: Calving glaciers in southern Patagonia are experiencing rapid mass loss, retreat, and flow acceleration, which is influenced by the bedrock geometry near their terminus. The buoyancy force plays an important role in the acceleration and retreat of lake-terminating glaciers.
JOURNAL OF GLACIOLOGY
(2023)
Article
Psychology, Multidisciplinary
Samantha E. Clark, Robin L. Locke, Sophia L. Baxendale, Ronald Seifer
Summary: This study investigated the roles of withdrawal, language, and context-inappropriate anger in the development of emotion knowledge among preschoolers. The findings showed that receptive language mediated the relationship between withdrawal behavior and situational emotion knowledge. However, context-inappropriate anger significantly interacted with receptive language, and moderate levels of context-inappropriate anger rendered the indirect effect of withdrawal behavior on situational emotion knowledge via receptive language insignificant.
FRONTIERS IN PSYCHOLOGY
(2022)
Article
Geography, Physical
Nicole Schaffer, Shelley MacDonell
Summary: The importance of Andean glaciers as water resources has been recognized in the past two decades. Laws have been enacted in Chile and Argentina to protect the glaciers, but they are limited in their effectiveness. The authors propose a classification system based on the sensitivity of glaciers to environmental changes, which can be adapted to meet the specific needs of different regions and evolve over time. The classification system can facilitate the evaluation and management of water resources.
Article
Environmental Sciences
Yanyan Cheng, Xiao Liu, Zhi Zeng, Shengshuai Liu, Zhaoyu Wang, Xu Tang, Bao-Jie He
Summary: This paper investigates the influence of water-adaptive space on the microclimate in a traditional polder village and demonstrates the positive impact of water bodies on improving the thermal environment and regulating the microclimate. The results provide guidance for rural planning, design, and revitalization.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Jurleys P. Vellojin, Gonzalo S. Saldias, Susan E. Allen, Rodrigo Torres, Maximiliano Vergara-Jara, Marcus Sobarzo, Michael D. DeGrandpre, Jose Luis Iriarte
Summary: The study highlights the influence of seasonal hydrographic processes in the Sub-Antarctic glacial fjord, Seno Ballena, with spring surface waters exhibiting lower pCO(2) and higher pH, while colder waters in winter and fall show higher pCO(2) and lower pH.
FRONTIERS IN MARINE SCIENCE
(2022)
Review
Environmental Sciences
Yong Nie, Hamish D. Pritchard, Qiao Liu, Thomas Hennig, Wenling Wang, Xiaoming Wang, Shiyin Liu, Santosh Nepal, Denis Samyn, Kenneth Hewitt, Xiaoqing Chen
Summary: Glaciers in the Himalaya-Karakoram mountain ranges provide freshwater and hydropower to millions of people, but they are melting at unsustainably high rates. Recent decades have seen accelerated mass loss in Himalayan glaciers, contrasting with relatively stable Karakoram glaciers. Under various climate change scenarios, glacier meltwater run-off in the two mountain ranges is expected to peak in the next few decades, followed by a decline as the glaciers shrink.
NATURE REVIEWS EARTH & ENVIRONMENT
(2021)
Article
Environmental Sciences
Li Huang, Shupeng Chen, Heng Wu, Yuhong He, Mi Zhou
Summary: This study uses field survey data from rural areas of Liaoning Province, China to examine the relationship between sanitation facilities and the health of rural residents. The results indicate that the use of traditional latrine pits is significantly associated with worse health outcomes for rural residents. Further research suggests that this relationship may be mediated by poor eating habits and water pollution. Using the Life satisfaction approach method, the study estimates that the health value of flush toilets accounts for 98% of annual per capita household income in the sample area.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Biodiversity Conservation
Zhigang Wang, Shengkui Cao, Guangchao Cao, Yaofang Hou, Youcai Wang, Ligang Kang
Summary: This study aims to systematically reveal the water variation in different vegetation landscape zones of the alpine inland river basin, delineate its water resources protection zones, and propose its water resources management strategies.
ECOLOGICAL INDICATORS
(2023)
Article
Geosciences, Multidisciplinary
David J. Harning, Lorelei Curtin, Aslaug Geirsdottir, William J. D'Andrea, Gifford H. Miller, Julio Sepulveda
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geography, Physical
Steven M. Colman, Andy Breckenridge, Lucas K. Zoet, Nigel J. Wattrus, Thomas C. Johnson
QUATERNARY RESEARCH
(2020)
Review
Geography, Physical
Aslaug Geirsdottir, David J. Harning, Gifford H. Miller, John T. Andrews, Yafang Zhong, Chris Caseldine
QUATERNARY SCIENCE REVIEWS
(2020)
Article
Geography, Physical
Aslaug Geirsdottir, Gifford H. Miller, David J. Harning, Hrafnhildur Hannesdottir, Thor Thordarson, Ingibjorg Jonsdottir
Summary: The study reconstructs the retreat process of the Iceland Ice Sheet in south Iceland using sediment records from Hestvatn, revealing the occurrence of glacial lake outburst floods and suggesting a possible link between subglacial volcanic activity and the events.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Ecology
Nicholas R. Budde, Howard D. Mooers, Timothy K. Cowdery, Nigel J. Wattrus
Summary: This study investigated the hydrology of two calcareous fens in the Glacial Lake Agassiz beach ridge complex in northwestern Minnesota. The results showed that the fens are well-connected to the beach-ridge aquifers, which provide a continual source of calcium-rich water. Understanding this connection is important for evaluating the potential impacts of human activities on calcareous fens.
Article
Multidisciplinary Sciences
Jonathan H. Raberg, Gifford H. Miller, Aslaug Geirsdottir, Julio Sepulveda
Summary: Bacterial brGDGT lipids are widely used in the study of terrestrial paleoclimate, and their distributions are correlated with environmental temperature and pH. This research found strong resemblances in the relationships between brGDGT fractional abundances and both temperature and pH, suggesting a physiological and/or biochemical basis for observed brGDGT distributions.
Article
Multidisciplinary Sciences
D. T. Rodbell, R. G. Hatfield, M. B. Abbott, C. Y. Chen, A. Woods, J. S. Stoner, D. McGee, P. M. Tapia, M. Bush, B. L. Valero-Garces, S. B. Lehmann, S. Z. Mark, N. C. Weidhaas, A. L. Hillman, D. J. Larsen, G. Delgado, S. A. Katz, K. E. Solada, A. E. Morey, M. Finkenbinder, B. Valencia, A. Rozas-Davila, N. Wattrus, S. M. Colman, M. G. Bustamante, J. Kueck, S. Pierdominici
Summary: This study presents a continuous and independently dated archive of tropical glaciation spanning 700,000 years, using a piston core from Lake Junin. The research finds that tropical glaciers were influenced by changes in global ice volume with an approximately 100,000-year periodicity. An increase in the extent of tropical Andean glaciers relative to global ice volume occurred between 200,000 and 400,000 years ago, during sustained intervals of regionally elevated hydrologic balance that modified the regular approximately 23,000-year pacing of monsoon-driven precipitation. Millennial-scale variations in the extent of tropical Andean glaciers during the last glacial cycle were driven by variations in regional monsoon strength that were linked to temperature perturbations in Greenland ice cores.
Article
Environmental Sciences
Jonathan H. Raberg, Edgart Flores, Sarah E. Crump, Greg de Wet, Nadia Dildar, Gifford H. Miller, Aslaug Geirsdottir, Julio Sepulveda
Summary: Paleotemperature histories derived from lake sediment archives are valuable for understanding modern and future climate changes. Branched glycerol dialkyl glycerol tetraether (brGDGT) lipids are useful for studying temperature changes due to their empirical correlation with temperature. However, the sources of brGDGTs in lake sediments and their contributions are difficult to determine. This study explores the potential of intact brGDGTs in providing insights into the sources and contributions of brGDGTs in Arctic lakes.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Geography, Physical
Nicolas Tournier, Stefano C. Fabbri, Flavio S. Anselmetti, Sri Yudawati Cahyarini, Satria Bijaksana, Nigel Wattrus, James M. Russell, Hendrik Vogel
Summary: Located in Indonesia, Sulawesi Island is highly tectonically active due to its location at the convergence of the Pacific, Eurasian, and Sunda plates. Lake Towuti, located in Eastern Sulawesi, can serve as an ideal archive for studying past earthquakes in the surrounding area. By combining seismic data and sediment core analysis, researchers have identified seismic events and turbidite deposits over the past 60,000 years.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geochemistry & Geophysics
Brendan T. Reilly, Joseph S. Stoner, Saedis Olafsdottir, Anne Jennings, Robert Hatfield, Greta Bjork Kristjansdottir, Aslaug Geirsdottir
Summary: We investigated the amplitude and frequency of geomagnetic change in the Northern North Atlantic region over the past 15 thousand years. Using high-resolution sediment cores, we validated prior results and provided stronger geochronological constraints on the paleomagnetic secular variation signal. Our study also revealed greater variability and higher amplitudes on centennial timescales, which is important for understanding the geodynamo.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Ecology
Jonatha H. Raberg, David J. Harning, Sarah E. Crump, Greg de Wet, Aria Blumm, Sebastian Kopf, Aslaug Geirsdottir, Gifford H. Miller, Julio Sepulveda
Summary: The use of brGDGT distributions in lake sediments for reconstructing terrestrial paleotemperatures is important, but the microbial producers of these membrane lipids remain unknown. Through new high-latitude lake sites and analysis methods, researchers have successfully deciphered the control of temperature, conductivity, and pH on brGDGT, revealed new distribution patterns, and provided a method for exploring the biological underpinnings of their structural diversity.
Article
Geology
A. Breckenridge, T. V. Lowell, D. Peteet, N. Wattrus, M. Moretto, N. Norris, A. Dennison
Summary: Glacial varves can provide important paleorecords detailing the response of ancient and modern ice sheets to climate change. The study presents a 1500-year varve chronology in North America, showing patterns of ice-margin retreat, melting, and moraine formation at the Holocene boundary. These findings highlight the potential of this dataset as the longest and most geographically extensive glacial varve data set in North America.
Article
Geosciences, Multidisciplinary
David J. Harning, Anne E. Jennings, Denizcan Koseoglu, Simon T. Belt, Aslaug Geirsdottir, Julio Sepulveda
Summary: The study combines data from different sources to detail the impact of the migration of the Arctic and polar fronts on the biological response over the past 8000 years on the North Iceland Shelf, showing the relationship between environmental changes and the position of the fronts. Research on the migration of the Arctic and polar fronts aids in understanding the changes in local productivity in response to climate change.
CLIMATE OF THE PAST
(2021)
Article
Environmental Sciences
John T. Andrews, Ingibjorg Jonsdottir, Aslaug Geirsdottir
ARCTIC ANTARCTIC AND ALPINE RESEARCH
(2019)
Article
Geosciences, Multidisciplinary
Aslaug Geirsdottir, Gifford H. Miller, John T. Andrews, David J. Harning, Leif S. Anderson, Christopher Florian, Darren J. Larsen, Thor Thordarson
CLIMATE OF THE PAST
(2019)
