Article
Engineering, Environmental
Scott G. Johnston, Damien T. Maher
Summary: This study analyzed flow-stratified water quality data from the Macleay River in Australia, showing that suspended sediment concentrations, major ions, dissolved organic carbon, and key nutrients all increased significantly after fires and floods, but gradually returned to pre-fire levels over time.
Article
Environmental Sciences
Robyn E. Tuerena, Jo Hopkins, Pearse J. Buchanan, Raja S. Ganeshram, Louisa Norman, Wilken-Jon Von Appen, Alessandro Tagliabue, Antonia Doncila, Martin Graeve, Kai U. Ludwichowski, Paul A. Dodd, Camille De la Vega, Ian Salter, Claire Mahaffey
Summary: The hydrography of the Arctic Seas is changing due to climate change, impacting nutrient dynamics and primary production. The study shows that physical processes control nutrient dynamics in the Fram Strait, with Atlantic Waters experiencing lower nitrogen limitation compared to Polar Surface Water. The loss of winter sea ice and continued atmospheric warming may hinder deep winter mixing and limit future primary production in the Arctic.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Nima Madani, Nicholas C. Parazoo, Charles E. Miller
Summary: Remote sensing and site-level observations have revealed significant changes in Arctic ecosystems due to climate warming, including vegetation greening, changes in species composition, and alterations in phenology. In this study, the solar induced chlorophyll fluorescence (SIF) was used to examine the phenological changes in Arctic ecosystems from 2000 to 2020. The results showed distinct regional trends in the response of ecosystems to climate change, influencing the timing of spring photosynthesis onset, peak productivity during the growing season, and fall senescence. The findings highlight the importance of biodiversity and phenology information in Arctic ecosystem models and projections for better understanding the impacts of climate change.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Review
Environmental Sciences
Patrick T. Gauthier, Tamzin A. Blewett, Emily R. Garman, Christian E. Schlekat, Elizabeth T. Middleton, Emily Suominen, Anne Cremazy
Summary: The Arctic faces various environmental challenges, including the exploitation of mineral resources like nickel. Responsible development of nickel mining in the Arctic requires a risk assessment framework specific to the region. Further research is needed to assess the exposure and effects of nickel in aquatic Arctic ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Oceanography
Zihui Gao, Shuyang Ma, Jianchao Li, Peng Sun, Yang Liu, Qinwang Xing, Qingsong He, Yongjun Tian
Summary: This study explores the long-term variations and regime shifts of eight large marine ecosystems in the Arctic, focusing on the comparison between ecosystems in the Atlantic and Pacific sectors. The results suggest that the fish abundance in the Atlantic sector showed an increasing trend before the 1970s/1980s and decreased subsequently, while the Pacific sector showed an increasing trend before the 1990s. Most of the ecosystems were regulated by Atlantic Multi-decadal Oscillation, with exceptions in the Greenland Sea and West Bering Sea LMEs.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Multidisciplinary Sciences
Chelsea W. Koch, Thomas A. Brown, Remi Amiraux, Carla Ruiz-Gonzalez, Maryam MacCorquodale, Gustavo A. Yunda-Guarin, Doreen Kohlbach, Lisa L. Loseto, Bruno Rosenberg, Nigel E. Hussey, Steve H. Ferguson, David J. Yurkowski
Summary: Koch and Brown et al. conducted a study on the transfer of ice algal carbon in the Arctic marine food web, finding that it is widespread and contributes to supporting organisms throughout the dark winter months. Through the use of lipid biomarkers, they identified ice algal carbon signatures in 96% of the organisms investigated, collected year-round from January to December. These findings highlight the importance of benthic retention of ice algal carbon and the potential disruptions to the food web with declining sea ice.
NATURE COMMUNICATIONS
(2023)
Article
Biodiversity Conservation
Yaping Chen, Feng S. Hu, Mark J. Lara
Summary: The study used high-resolution aerial and satellite imagery data to investigate the relationship between shrub-cover change in the Arctic tundra and key environmental drivers like climate change and fire disturbance. Results suggest that summer precipitation is the most important climatic driver for shrub expansion, and shrub expansion in the uplands is largely enhanced by wildfire.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Oceanography
Z. L. Jacobs, A. Yool, F. Jebri, M. Srokosz, S. van Gennip, S. J. Kelly, M. Roberts, W. Sauer, A. M. Queiros, K. E. Osuka, M. Samoilys, A. E. Becker, E. Popova
Summary: The study highlights the importance of understanding potential impacts of future climate change on marine ecosystems in the countries bordering the tropical Western Indian Ocean. Using a high-resolution ocean model, the research identifies key regionally important climate change stressors over the East African Coastal Current and underscores the need for regional monitoring systems and investment in decadal prediction methods.
OCEAN & COASTAL MANAGEMENT
(2021)
Article
Plant Sciences
Xianxian Wang, Ru Wang, Jie Gao
Summary: This study found that alpine meadows have higher net primary productivity (NPP) compared to desert steppes in China. Soil nutrient content is the dominant factor affecting NPP in alpine meadows, while precipitation plays a major role in NPP variation in desert steppes.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biodiversity Conservation
Chaoya Dang, Zhenfeng Shao, Xiao Huang, Qingwei Zhuang, Gui Cheng, Jiaxin Qian
Summary: This study used the OFP method and RDA to determine the importance of key drivers of vegetation productivity in Northern Hemisphere ecosystems. The results showed that solar-induced chlorophyll fluorescence, gross primary productivity, and net primary productivity increased in most vegetation areas. The length of the growing season and temperature were identified as the dominant factors driving vegetation productivity.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Ji-Hoon Oh, Soon-Il An, Jongsoo Shin, Jong-Seong Kug
Summary: This study demonstrates the importance of the initial buoyancy states of the Arctic Ocean in determining the recovery of Arctic and global temperatures. It suggests that denser Arctic water and faster recovery of the Atlantic meridional overturning circulation are linked to delayed Arctic temperature recovery.
News Item
Multidisciplinary Sciences
Alexandra Witze
Summary: A team has detected a significant increase in lightning strikes in the Arctic, potentially linked to climate change, but others are unable to confirm these findings at this time.
Article
Meteorology & Atmospheric Sciences
Xiaodan Chen, Aiguo Dai
Summary: Under the influence of increasing greenhouse gases, the Arctic warms at a faster rate compared to other regions, known as Arctic amplification. It is found that the impact of increased CO2 on meridional wind (upsilon) is more significant than the effect of Arctic amplification alone, especially in the northern extratropics. The changes in upsilon are associated with variations in zonal temperature gradients caused by CO2 forcing. Furthermore, the study reveals that both CO2 forcing and Arctic amplification affect the climatology of northerlies over different regions, leading to complex responses in zonal temperature gradients and upsilon.
JOURNAL OF CLIMATE
(2022)
Article
Plant Sciences
Brooke L. Weigel, Sadie L. Small, Helen D. Berry, Megan N. Dethier
Summary: Warming ocean temperatures and low nutrient concentrations have led to declines in bull kelp populations in the Salish Sea. In laboratory experiments, high temperatures had a more negative impact on microscopic stages of bull kelp compared to low nitrogen levels. Gametophytes were most abundant between 10 and 16℃, while sporophyte production peaked at 10-14℃. Field observations confirmed that the thermal limits for gametophyte growth (18℃) and sporophyte production (16-18℃) were reached during the summer. Caution should be taken to prevent prolonged exposure of bull kelp gametophytes to temperatures above 16℃, as it could limit reproduction and recruitment of adult sporophytes.
JOURNAL OF PHYCOLOGY
(2023)
Article
Environmental Sciences
Jin-Soo Kim, Jong-Seong Kug, Sujong Jeong, Jin-Ho Yoon, Ning Zeng, Jinkyu Hong, Jee-Hoon Jeong, Yuan Zhao, Xiaoqiu Chen, Mathew Williams, Kazuhito Ichii, Gabriela Schaepman-Strub
Summary: The study found that winter warming in the Barents-Kara Sea region has led to negative temperature anomalies and leaf area index anomalies in most areas of East Asia, especially in the subtropical evergreen forests of southern China. These anomalies have also impacted spring vegetation activity and gross primary productivity.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Editorial Material
Environmental Sciences
Adam J. Reed, Robyn E. Tuerena, Philippe Archambault, Martin Solan
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Retraction
Environmental Sciences
Carl P. Spingys, Richard G. Williams, Robyn E. Tuerena, Alberto Naveira Garabato, Clement Vic, Alexander Forryan, Jonathan Sharples
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Robyn E. Tuerena, Jo Hopkins, Pearse J. Buchanan, Raja S. Ganeshram, Louisa Norman, Wilken-Jon Von Appen, Alessandro Tagliabue, Antonia Doncila, Martin Graeve, Kai U. Ludwichowski, Paul A. Dodd, Camille De la Vega, Ian Salter, Claire Mahaffey
Summary: The hydrography of the Arctic Seas is changing due to climate change, impacting nutrient dynamics and primary production. The study shows that physical processes control nutrient dynamics in the Fram Strait, with Atlantic Waters experiencing lower nitrogen limitation compared to Polar Surface Water. The loss of winter sea ice and continued atmospheric warming may hinder deep winter mixing and limit future primary production in the Arctic.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Engineering, Environmental
Tina Sanders, Claudia Fiencke, Matthias Fuchs, Charlotte Haugk, Bennet Juhls, Gesine Mollenhauer, Olga Ogneva, Paul Overduin, Juri Palmtag, Vasily Povazhniy, Jens Strauss, Robyn Tuerena, Nadine Zell, Kirstin Dahnke
Summary: The Arctic is nutrient limited, particularly by nitrogen, and is impacted by anthropogenic global warming which accelerates the thawing of permafrost. Organic nitrogen from terrestrial sources is transported to the Arctic Ocean, potentially increasing nitrous oxide emissions to the atmosphere.
Article
Environmental Sciences
Carl P. Spingys, Richard G. Williams, Robyn E. Tuerena, Alberto Naveira Garabato, Clement Vic, Alexander Forryan, Jonathan Sharples
Summary: The study explores the importance of providing nutrient supply in oligotrophic waters in the subtropical North Atlantic through measuring diapycnal mixing, diapycnal advection, and mesoscale eddies. The results indicate that these mechanisms provide nutrients within the euphotic zone, while eddy stirring replenishes nutrients in the upper thermocline.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Ecology
Adam Francis, Raja S. Ganeshram, Robyn E. Tuerena, Robert G. M. Spencer, Robert M. Holmes, Jennifer A. Rogers, Claire Mahaffey
Summary: Climate change is degrading permafrost in the Arctic, releasing nitrogen into Arctic rivers. This study investigates the changes in nitrogen species and isotopes in the Kolyma River and other Arctic rivers due to permafrost degradation. The results suggest that permafrost thaw zones contribute to nitrogen cycling and nutrient release in the Kolyma River, while other rivers show seasonal changes in isotopic signatures. Nitrogen isotope analysis has the potential to identify permafrost-derived nitrogen inputs, but on a small spatial scale.
Article
Ecology
Marta Santos-Garcia, Raja S. Ganeshram, Robyn E. Tuerena, Margot C. F. Debyser, Katrine Husum, Philipp Assmy, Haakon Hop
Summary: The ongoing climate change in the Arctic is causing the retreat of tidewater glaciers and increasing the discharge of freshwater and terrestrial material into fjords. This study assesses the influence of tidewater glaciers on nitrogen inputs and cycling in two fjords in Svalbard and highlights the importance of terrestrial nutrient sources in sustaining productivity within fjords.
Article
Ecology
Margot C. F. Debyser, Laetitia Pichevin, Robyn E. Tuerena, Paul A. Dodd, Antonia Doncila, Raja S. Ganeshram
Summary: Changing hydrography, increasing riverine inputs, glacial melt, and sea-ice loss are altering nutrient cycles in the Arctic Ocean. Isotope measurements reveal that coupled benthic denitrification and nitrification processes on Eurasian Arctic shelves lead to enriched isotopic signatures of dissolved nitrate and silicic acid in polar surface waters. The study also highlights the potential impact of Arctic riverine inputs on the North Atlantic dissolved silicon budget.
Article
Ecology
Charlotte Haugk, Loeka L. Jongejans, Kai Mangelsdorf, Matthias Fuchs, Olga Ogneva, Juri Palmtag, Gesine Mollenhauer, Paul J. Mann, P. Paul Overduin, Guido Grosse, Tina Sanders, Robyn E. Tuerena, Lutz Schirrmeister, Sebastian Wetterich, Alexander Kizyakov, Cornelia Karger, Jens Strauss
Summary: The organic carbon stored in Arctic permafrost is one of the largest terrestrial carbon pools on Earth, but it is highly vulnerable to climate warming. Permafrost deposits exposed at river cliffs and coasts are particularly susceptible to thawing, leading to increased transfer of organic matter to nearby waters. However, there is still a lack of quantitative research on the amount of carbon and nitrogen in these permafrost deposits, as well as the quality of the organic matter.
Article
Geosciences, Multidisciplinary
Maria-Theresia Verwega, Christopher J. Somes, Markus Schartau, Robyn Elizabeth Tuerena, Anne Lorrain, Andreas Oschlies, Thomas Slawig
Summary: Observations of marine particulate organic carbon stable isotope ratios are crucial for understanding carbon cycling, but the interpretation is complicated by phytoplankton photosynthesis. By collecting and homogenizing a large dataset, insights into the temporal and spatial distribution of marine δ C-13(POC) can be gained, revealing varying trends across different ocean basins.
EARTH SYSTEM SCIENCE DATA
(2021)
Article
Ecology
Robyn E. Tuerena, Joanne Hopkins, Raja S. Ganeshram, Louisa Norman, Camille de la Vega, Rachel Jeffreys, Claire Mahaffey
Summary: The Barents Sea is experiencing significant warming and sea ice retreat due to increased ocean heat transport from the Atlantic, leading to a transformation in its climate regime. Nutrient cycling in the Barents Sea is efficient, with benthic denitrification having no significant impact on nitrate isotopic composition. Changes in Barents Sea productivity are unlikely to alter nitrogen availability or transport to the central Arctic Basin.
Article
Limnology
Camille de la Vega, Claire Mahaffey, Robyn E. Tuerena, David J. Yurkowski, Steven H. Ferguson, Garry B. Stenson, Erling S. Nordoy, Tore Haug, Martin Biuw, Sophie Smout, Jo Hopkins, Alessandro Tagliabue, Rachel M. Jeffreys
Summary: This study used stable nitrogen isotopes to investigate the trophic position of seals across large spatial scales in the Arctic, showing a direct link between δ N-15 of seal muscle amino acids and seawater nitrate. The variation in δ N-15 of seals reflects differences in δ N-15 end members in Pacific vs. Atlantic waters, providing a framework for assessing ecosystem changes at pan-Arctic scales.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2021)
Article
Ecology
Robyn E. Tuerena, Raja S. Ganeshram, Matthew P. Humphreys, Thomas J. Browning, Heather Bouman, Alexander P. Piotrowski
Article
Limnology
C. Davis, M. C. Lohan, R. Tuerena, E. Cerdan-Garcia, E. M. S. Woodward, A. Tagliabue, C. Mahaffey
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2019)