Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 38
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A Three‐way Balance in The Beaufort Gyre: The Ice‐Ocean Governor, Wind Stress, and Eddy Diffusivity ArchiMer
Doddridge, Edward W.; Meneghello, Gianluca; Marshall, John; Scott, Jon; Lique, Camille.
The Beaufort Gyre (BG) is a large anticyclonic circulation in the Arctic Ocean. Its strength is directly related to the halocline depth, and therefore also to the storage of freshwater. It has recently been proposed that the equilibrium state of the BG is set by the Ice‐Ocean Governor, a negative feedback between surface currents and ice‐ocean stress, rather than a balance between lateral mesoscale eddy fluxes and surface Ekman pumping. However, mesoscale eddies are present in the Arctic Ocean; it is therefore important to extend the Ice‐Ocean Governor theory to include lateral fluxes due to mesoscale eddies. Here, a non‐linear ordinary differential equation is derived that represents the effects of wind stress, the Ice‐Ocean Governor, and eddy fluxes....
Tipo: Text Palavras-chave: Beaufort Gyre; Ice-Ocean Governor; Mesoscale eddies; Arctic; Sea ice.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00487/59844/62994.pdf
Imagem não selecionada

Imprime registro no formato completo
Adapting to Climate Change: Social-Ecological Resilience in a Canadian Western Arctic Community Ecology and Society
Berkes, Fikret; University of Manitoba; berkes@cc.umanitoba.ca; Jolly, Dyanna; University of Manitoba; dyjolly@ihug.co.nz.
Human adaptation remains an insufficiently studied part of the subject of climate change. This paper examines the questions of adaptation and change in terms of social-ecological resilience using lessons from a place-specific case study. The Inuvialuit people of the small community of Sachs Harbour in Canada's western Arctic have been tracking climate change throughout the 1990s. We analyze the adaptive capacity of this community to deal with climate change. Short-term responses to changes in land-based activities, which are identified as coping mechanisms, are one component of this adaptive capacity. The second component is related to cultural and ecological adaptations of the Inuvialuit for life in a highly variable and uncertain environment; these...
Tipo: Peer-Reviewed Reports Palavras-chave: Social-ecological systems; Sustainability science; Arctic; Canadian North; Inuit; Inuvialuit; Adaptive strategies; Climate change; Community-based research; Coping mechanisms; Human ecology; Participatory research; Participatory research; Resilience; Social-ecological systems.
Ano: 2001
Imagem não selecionada

Imprime registro no formato completo
Art and artistic processes bridge knowledge systems about social-ecological change: An empirical examination with Inuit artists from Nunavut, Canada Ecology and Society
Rathwell, Kaitlyn J; Environmental Change and Governance Group, University of Waterloo; Waterloo Institute for Social Innovation and Resilience, University of Waterloo; kaitlyn.rathwell@gmail.com; Armitage, Derek; Environmental Change and Governance Group, University of Waterloo; derek.armitage@uwaterloo.ca.
The role of art and artistic processes is one fruitful yet underexplored area of social-ecological resilience. Art and art making can nurture Indigenous knowledge and at the same time bridge knowledge across generations and cultures (e.g., Inuit and scientific). Experiences in two Inuit communities in northern Canada (Cape Dorset and Pangnirtung, Nunavut) provide the context in which we empirically examine the mechanisms through which art and art making may bridge knowledge systems about social-ecological change. Art making and artworks create continuity between generations via symbols and skill development (e.g., seal skin stretching for a modern artistic mural) and by creating mobile and adaptive boundary objects that function as a shared reference point...
Tipo: Peer-Reviewed Reports Palavras-chave: Arctic; Art; Bridging knowledge systems; Knowledge integration; Knowledge systems; Resilience; Social-ecological change; Traditional ecological knowledge.
Ano: 2016
Imagem não selecionada

Imprime registro no formato completo
Avian Cholera emergence in Arctic-nesting northern Common Eiders: using community-based, participatory surveillance to delineate disease outbreak patterns and predict transmission risk Ecology and Society
Iverson, Samuel A; Department of Biology, Simon Fraser University; Canadian Wildlife Service, Environment and Climate Change Canada; samuel.iverson@canada.ca; Forbes, Mark R.; Department of Biology, Carleton University; mark_forbes@carleton.ca; Simard, Manon; Nunavik Research Centre, Makivik Corporation, Kuujjuaq; manonsimard@eeyoumarineregion.ca; Soos, Catherine; Science and Technology Branch, Environment and Climate Change Canada; Department of Veterinary Pathology, University of Saskatchewan; catherine.soos@canada.ca; Gilchrist, H. Grant; National Wildlife Research Centre, Environment and Climate Change Canada; grant.gilchrist@canada.ca.
Emerging infectious diseases are a growing concern in wildlife conservation. Documenting outbreak patterns and determining the ecological drivers of transmission risk are fundamental to predicting disease spread and assessing potential impacts on population viability. However, evaluating disease in wildlife populations requires expansive surveillance networks that often do not exist in remote and developing areas. Here, we describe the results of a community-based research initiative conducted in collaboration with indigenous harvesters, the Inuit, in response to a new series of Avian Cholera outbreaks affecting Common Eiders (Somateria mollissima) and other comingling species in the Canadian Arctic. Avian Cholera is a virulent disease of birds caused by...
Tipo: Peer-Reviewed Reports Palavras-chave: Arctic; Avian Cholera; Common Eider; Conservation; Emerging infectious disease; Inuit; Maxent; Participatory surveillance; Species-habitat model.
Ano: 2016
Imagem não selecionada

Imprime registro no formato completo
Can Local Ecological Knowledge Contribute to Wildlife Management? Case Studies of Migratory Birds Ecology and Society
Gilchrist, Grant; ; grant.gilchrist@ec.gc.ca; Mallory, Mark; ; mark.mallory@ec.gc.ca; Merkel, Flemming; ;.
Sound management of wildlife species, particularly those that are harvested, requires extensive information on their natural history and demography. For many global wildlife populations, however, insufficient scientific information exists, and alternative data sources may need to be considered in management decisions. In some circumstances, local ecological knowledge (LEK) can serve as a useful, complementary data source, and may be particularly valuable when managing wildlife populations that occur in remote locations inhabited by indigenous peoples. Although several published papers discuss the general benefits of LEK, few attempt to examine the reliability of information generated through this approach. We review four case studies of marine birds in...
Tipo: Peer-Reviewed Reports Palavras-chave: Arctic; Inuit; LEK; Local ecological knowledge; Marine birds; Population declines; TEK; Traditional ecological knowledge.
Ano: 2005
Imagem não selecionada

Imprime registro no formato completo
Comparing Expert-Based Science With Local Ecological Knowledge: What Are We Afraid Of? Ecology and Society
Gilchrist, Grant; Canadian Wildlife Service National Wildlife Research Centre. 1125 Colonel By Drive, Raven Road, Carleton University. Ottawa, Canada. K1A 0H3; grant.gilchrist@ec.gc.ca; Mallory, Mark L; Canadian Wildlife Service; mark.mallory@ec.gc.ca.
Tipo: Peer-Reviewed Response Palavras-chave: Arctic; Ecological science; LEK; Local ecological knowledge; Wildlife management..
Ano: 2007
Imagem não selecionada

Imprime registro no formato completo
Enhanced Arctic Sea Ice Drift Estimation Merging Radiometer and Scatterometer Data ArchiMer
Ardhuin, Fanny; Ezraty, Robert.
Satellites enable daily and global coverage of the polar oceans and provide a unique monitoring capability of sea ice dynamics. Sea ice drift maps can be estimated in Arctic from several satellite sensors, particularly from scatterometers and radiometers. This study presents the benefits of combining single drift fields at the same resolution into a "merged" field, built at three-and six-day lags during winters with a 62.5-km resolution. It is shown that combining these drift fields not only increases the reliability of the displacement estimation and the number of estimated vectors to almost a full ice covered area but also expands the time period over which these estimations are reliable from freeze until the melt onset. The autumn-winter-spring sea ice...
Tipo: Text Palavras-chave: Arctic; Advanced Scatterometer (ASCAT); Drift; Merging; Scatterometry; Sea ice.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00088/19895/17729.pdf
Imagem não selecionada

Imprime registro no formato completo
Feeding of Greenland halibut ( Reinhardtius hippoglossoides ) in the Canadian Beaufort Sea ArchiMer
Giraldo, Carolina; Stasko, Ashley; Walkusz, Wojciech; Majewski, Andrew; Rosenberg, Bruno; Power, Michael; Swanson, Heidi; Reist, James D..
Trophic patterns for Greenland Halibut are reported for the first time in the Canadian Beaufort Sea and Amundsen Gulf (n = 269). Samples were collected from 2012 to 2014 on the upper (300–500 m) and lower continental slope (750–1500 m) and were analyzed for stomach contents, stable isotopes ratios and fatty acids (FA). Stomach contents indicated that Arctic Cod, Boreogadus saida, was the main prey ingested on the upper slope (50–94% of total biomass) whereas Gelatinous Snailfish (Liparis fabricii) and Zoarcids (Lycodes spp.) dominated diets on the lower slope (17–62% of total biomass). Stable isotope mixing models and FA analyses also identified benthopelagic fishes (i.e., Liparis spp., B. saida) as key prey and highlighted large dietary overlap among...
Tipo: Text Palavras-chave: Benthic-pelagic coupling; Trophic niche; Biomarkers; Arctic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00435/54611/55992.pdf
Imagem não selecionada

Imprime registro no formato completo
Freshwater and its role in the Arctic Marine System: sources, disposition, storage, export, and physical and biogeochemical consequences in the Arctic and global oceans ArchiMer
Carmack, E. C.; Yamamoto-kawai, M.; Haine, T. W. N.; Bacon, S.; Bluhm, B. A.; Lique, Camille; Melling, H.; Polyakov, I. V.; Straneo, F.; Timmermans, M. -l.; Williams, W. J..
The Arctic Ocean is a fundamental node in the global hydrological cycle and the ocean's thermohaline circulation. We here assess the system's key functions and processes: 1) the delivery of fresh and low salinity waters to the Arctic Ocean by river inflow, net precipitation, distillation during the freeze/thaw cycle and Pacific Ocean inflows; 2) the disposition (e.g. sources, pathways and storage) of freshwater components within the Arctic Ocean; and 3) the release and export of freshwater components into the bordering convective domains of the North Atlantic. We then examine physical, chemical or biological processes which are influenced or constrained by the local quantities and geochemical qualities of fresh water; these include: stratification and...
Tipo: Text Palavras-chave: Arctic; Oceans; Circulation; Freshwater; Carbon cycle; Acidification.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00313/42460/41831.pdf
Imagem não selecionada

Imprime registro no formato completo
Genomics and telemetry suggest a role for migration harshness in determining overwintering habitat choice, but not gene flow, in anadromous Arctic Char ArchiMer
Moore, Jean-sebastien; Harris, Les N.; Le Luyer, Jeremy; Sutherland, Ben J. G.; Rougemont, Quentin; Tallman, Ross F.; Fisk, Aaron T.; Bernatchez, Louis.
Migration is a ubiquitous life history trait with profound evolutionary and ecological consequences. Recent developments in telemetry and genomics, when combined, can bring significant insights on the migratory ecology of non-model organisms in the wild. Here, we used this integrative approach to document dispersal, gene flow and potential for local adaptation in anadromous Arctic Char from six rivers in the Canadian Arctic. Acoustic telemetry data from 124 tracked individuals indicated asymmetric dispersal, with a large proportion of fish (72%) tagged in three different rivers migrating up the same short river in the fall. Population genomics data from 6,136 SNP markers revealed weak, albeit significant, population differentiation (average pairwise FST =...
Tipo: Text Palavras-chave: Arctic; Conservation; Fish migration; Fishery management; Genotyping by sequencing; Population genomics; RADseq.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00409/52049/52719.pdf
Imagem não selecionada

Imprime registro no formato completo
Integrating Traditional Ecological Knowledge and Ecological Science: a Question of Scale Ecology and Society
The benefits and challenges of integrating traditional ecological knowledge and scientific knowledge have led to extensive discussions over the past decades, but much work is still needed to facilitate the articulation and co-application of these two types of knowledge. Through two case studies, we examined the integration of traditional ecological knowledge and scientific knowledge by emphasizing their complementarity across spatial and temporal scales. We expected that combining Inuit traditional ecological knowledge and scientific knowledge would expand the spatial and temporal scales of currently documented knowledge on the arctic fox (Vulpes lagopus) and the greater snow goose (Chen caerulescens atlantica), two important tundra species. Using...
Tipo: Peer-Reviewed Reports Palavras-chave: Arctic; Inuit; Protected area; Scale; Chen caerulescens atlantica; Traditional ecological knowledge; Vulpes lagopus; Alopex lagopus; Local ecological knowledge; Scientific knowledge.
Ano: 2009
Imagem não selecionada

Imprime registro no formato completo
Iron isotope systematics in Arctic rivers ArchiMer
Escoube, Raphaelle; Rouxel, Olivier; Pokrovsky, Oleg S.; Schroth, Andrew; Holmes, Robert Max; Donard, Olivier F. X..
The input of iron to the Arctic Ocean plays a critical role in the productivity of aquatic ecosystems and is potentially impacted by climate change. We examine Fe isotope systematics of dissolved and colloidal Fe from several Arctic and sub-Arctic rivers in northern Eurasia and Alaska. We demonstrate that the Fe isotopic (δ56Fe) composition of large rivers, such as the Ob’ and Lena, has a restricted range of δ56Fe values ca.–0.11 ± 0.13‰, with minimal seasonal variability, in stark contrast to smaller organic-rich rivers with an overall δ56Fe range from–1.7 to + 1.6‰. The preferential enrichment with heavy Fe isotopes observed in low molecular weight colloidal fraction and during the high-flow period is consistent with the role of organic complexation of...
Tipo: Text Palavras-chave: Iron isotope; Colloids; River; Weathering; Arctic; Iron speciation.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00273/38402/36865.pdf
Imagem não selecionada

Imprime registro no formato completo
Leaking methane reservoirs offshore Svalbard ArchiMer
Minshull, T. A.; Westbrook, Graham; Weitemeyer, K. A.; Sinha, M. C.; Goswami, B. K.; Marsset, Bruno.
Methane hydrate—a solid substance in which methane is trapped within ice‐like crystals—is stable at low temperatures and high pressures and may be destabilized by ocean warming on both geological and human time scales. Methane is a powerful greenhouse gas, and methane released from hydrate provides a potential positive feedback mechanism in global climate change [e.g., Archer and Buffett, 2005]—in theory, the more methane is released by the hydrates, the warmer the climate gets, causing the ocean to warm and release more methane. However, methane escaping from the seabed is oxidized and dissolved in the ocean, and insufficient methane may reach the atmosphere to affect the climate significantly. Its importance for climate change therefore depends on...
Tipo: Text Palavras-chave: Methane hydrate; Svalbard; Sea floor; Seismic; Electromagnetic; Arctic.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00451/56262/57832.pdf
Imagem não selecionada

Imprime registro no formato completo
Measuring perceptions of climate change in northern Alaska: pairing ethnography with cultural consensus analysis Ecology and Society
Carothers, Courtney; School of Fisheries and Ocean Sciences, University of Alaska Fairbanks; clcarothers@alaska.edu; Brown, Caroline; Division of Subsistence, Alaska Department of Fish and Game; caroline.brown@alaska.gov; Moerlein, Katie J; School of Fisheries and Ocean Sciences, University of Alaska Fairbanks; katie.moerlein@gmail.com; Andersen, David B.; Research North; resnorth@eagle.ptialaska.net; Retherford, Brittany; Division of Subsistence, Alaska Department of Fish and Game; brittany.retherford@alaska.gov.
Tipo: Peer-Reviewed Reports Palavras-chave: Arctic; Climate change; Cultural consensus analysis; Fishing; Indigenous peoples; Local and traditional ecological knowledge; Subsistence.
Ano: 2014
Imagem não selecionada

Imprime registro no formato completo
Mollusques et Brachiopodes recueillis en 1908 par la mission Bénard dans les mers du Nord (Nouvelle-Zemble, Mer de Barents, Mer Blanche, Océan Glacial, Norvège, Mer du Nord) OMA
Dautzenberg, Ph.; Fischer, H..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiopoda [Lamp shells] Molluscs PN; Arctic.
Ano: 1911 URL: http://www.vliz.be/imisdocs/publications/241918.pdf
Imagem não selecionada

Imprime registro no formato completo
Observed atlantification of the Barents Sea causes the Polar Front to limit the expansion of winter sea ice ArchiMer
Barton, Benjamin I.; Lenn, Yueng-djern; Lique, Camille.
Barents Sea Water (BSW) is formed from Atlantic Water that is cooled through atmospheric heat loss and freshened through seasonal sea ice melt. In the eastern Barents Sea, the BSW and fresher, colder Arctic Water meet at the surface along the Polar Front (PF). Despite its importance in setting the northern limit of BSW ventilation, the PF has been poorly-documented, mostly eluding detection by observational surveys that avoid seasonal sea ice. In this study, satellite sea surface temperature (SST) observations are used in addition to a temperature and salinity climatology to examine the location and structure of the PF, and characterise its variability over the period 1985 – 2016. It is shown that the PF is independent of the position of the sea ice edge...
Tipo: Text Palavras-chave: Arctic; Sea ice; Fronts; Sea surface temperature; Satellite observations.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00448/56003/57509.pdf
Imagem não selecionada

Imprime registro no formato completo
On Using Expert-Based Science to “Test” Local Ecological Knowledge Ecology and Society
Brook, Ryan K; University of Manitoba; ryan_brook@umanitoba.ca.
Tipo: Peer-Reviewed Response Palavras-chave: Arctic; Empowerment; Expert-based science; Local ecological knowledge; Wildlife management.
Ano: 2005
Imagem não selecionada

Imprime registro no formato completo
Overview of the Arctic Sea State and Boundary Layer Physics Program ArchiMer
Thomson, Jim; Ackley, Stephen; Girard-ardhuin, Fanny; Ardhuin, Fabrice; Babanin, Alex; Boutin, Guillaume; Brozena, John; Cheng, Sukun; Collins, Clarence; Doble, Martin; Fairall, Chris; Guest, Peter; Gebhardt, Claus; Gemmrich, Johannes; Graber, Hans C.; Holt, Benjamin; Lehner, Susanne; Lund, Bjorn; Meylan, Michael H.; Maksym, Ted; Montiel, Fabien; Perrie, Will; Persson, Ola; Rainville, Luc; Rogers, W. Erick; Shen, Hui; Shen, Hayley; Squire, Vernon; Stammerjohn, Sharon; Stopa, Justin; Smith, Madison M.; Sutherland, Peter; Wadhams, Peter.
A large collaborative program has studied the coupled air‐ice‐ocean‐wave processes occurring in the Arctic during the autumn ice advance. The program included a field campaign in the western Arctic during the autumn of 2015, with in situ data collection and both aerial and satellite remote sensing. Many of the analyses have focused on using and improving forecast models. Summarizing and synthesizing the results from a series of separate papers, the overall view is of an Arctic shifting to a more seasonal system. The dramatic increase in open water extent and duration in the autumn means that large surface waves and significant surface heat fluxes are now common. When refreezing finally does occur, it is a highly variable process in space and time. Wind and...
Tipo: Text Palavras-chave: Arctic; Waves; Autumn; Sea ice; Beaufort; Flux.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00437/54837/56313.pdf
Imagem não selecionada

Imprime registro no formato completo
Polar Lows Over the Eastern Part of the Eurasian Arctic: The Sea-Ice Retreat Consequence ArchiMer
Zabolotskikh, Elizaveta V.; Gurvich, Irina A.; Chapron, Bertrand.
With the sea-ice decline over the eastern part of the Eurasian Arctic (EEA), polar mesocyclones (MCs) and their most intensive representatives-polar lows (PLs)-can occur over more open-water areas. Visible and infrared MODIS images, active and passive microwave spaceborne instruments, and ERA Interim reanalysis data are combined and used to analyze the synoptic situations and to infer the factors influencingMC appearance and evolution over the Kara Sea, the Laptev Sea, the East Siberian Sea, and the Chukchi Sea. In recent years, the Arctic more often loses its summer sea-ice cover, and PLs may more commonly emerge within open-water Eastern Arctic regions during fall and summer months. This conclusion is derived basing on the analysis of more than 150 MCs...
Tipo: Text Palavras-chave: Arctic; Geoscience; Mesoscale cyclones.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00358/46870/48388.pdf
Imagem não selecionada

Imprime registro no formato completo
Postglacial paleoceanography of the western Barents Sea: Implications for alkenone-based sea surface temperatures and primary productivity ArchiMer
Łącka, Magdalena; Cao, Min; Rosell-melé, Antoni; Pawłowska, Joanna; Kucharska, Małgorzata; Forwick, Matthias; Zajączkowski, Marek.
The increasing influence of Atlantic Water (AW) in the Barents Sea, a process known as “Atlantification”, is gradually decreasing sea ice cover in the region. Ongoing global climate warming is likely to be one of its drivers, but to further understand the role of natural variability and the biogeochemical impacts of the inflow of AW into the western Barents Sea, we reconstructed sea surface temperatures (SSTs) and primary productivity in Storfjordrenna, a climatically sensitive area south of Spitsbergen, between approximately 13,950 cal yr BP and 1300 cal yr BP. The alkenone proxy has been applied to reconstruct SSTs, and the alkenone accumulation rate in marine sediments has been used to infer changes in primary productivity. Our data show that the SST...
Tipo: Text Palavras-chave: Alkenones; Stratification; Holocene; Sea ice decrease; Global warming; North Atlantic Current; Arctic.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00585/69740/67629.pdf
Registros recuperados: 38
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional