8,680 research outputs found
Revised circulation scheme north of the Denmark Strait
No full textThe circulation and water mass transports north of the Denmark Strait are investigated using recently collected and historical in situ data along with an idealized numerical model and atmospheric reanalysis fields. Emphasis is placed on the pathways of dense water feeding the Denmark Strait Overflow Water plume as well as the upper-layer circulation of freshwater. It is found that the East Greenland Current (EGC) bifurcates at the northern end of the Blosseville Basin, some 450 km upstream of the Denmark Strait, advecting overflow water and surface freshwater away from the boundary. This “separated EGC” flows southward adjacent to the previously identified North Icelandic Jet, indicating that approximately 70% of the Denmark Strait Overflow Water approaches the sill along the Iceland continental slope. Roughly a quarter of the freshwater transport of the EGC is diverted offshore via the bifurcation. Two hypotheses are examined to explain the existence of the separated EGC. The atmospheric fields demonstrate that flow distortion due to the orography of Greenland imparts significant vorticity into the ocean in this region. The negative wind stress curl, together with the closed bathymetric contours of the Blosseville Basin, is conducive for spinning up an anti-cyclonic gyre whose offshore branch could represent the separated EGC. An idealized numerical simulation suggests instead that the current is primarily eddy-forced. In particular, baroclinic instability of the model EGC spawns large anti-cyclones that migrate offshore and coalesce upon reaching the Iceland continental slope, resulting in the separated EGC. Regardless of the formation mechanism, the recently obtained shipboard data and historical hydrography both indicate that the separated EGC is a permanent feature of the circulation north of the Denmark Strait.Highlights
•We investigate the circulation and water mass transports north of the Denmark Strait.
•We find that the East Greenland Current bifurcates some 450 km north of the strait.
• Most of the Denmark Strait Overflow Water approaches the sill along the Iceland slope.
•A quarter of the East Greenland Current's freshwater transport is diverted offshore.
•We propose two hypotheses to explain the bifurcation
The regional geopolitics of the strait of Gibraltar
No full textSecurity of passage of the Strait of Gibraltar is an imperative for the world community. To achieve this, there must be stability on the northern and southern shores of the Strait. Peace in the region is currently threatened by the "creeping jurisdiction" which both Spain and Morocco wish to exert over the waters of the Strait. Other factors which threaten stability are the historical rivalry which exists between Spain and the Islamic southern shore; the legacy of disputed sovereignty in the Crown Colony of Gibraltar and the Spanish Plazas in North Africa; the economic divide betwen the EC and Maghreb along the Strait axis; and the possible threat of militant Islam. Contentions also exist between Morocco and Algeria, eg the Western Saharan War. The re-establishment of a strong "power hierarchy" in the area must be supported by such international instruments as the UN Convention on the Law of the Sea (1982). The Crown Colony and the Spanish Plazas must be decolonized once Spain is firmly integrated into the EC and NATO, and once Morocco has reached a level of economic and political development that is condusive to closer ties with Western institutions
Miocene deep-water agglutinated foraminifera from the Lomonosov Ridge and the opening of the Fram Strait
No full textDeep-water agglutinated Foraminifera (DWAF) were recovered from Miocene to Pliocene sediments in 103 samples
from IODP Hole M0002A on the Lomonosov Ridge. The First Occurrence of DWAF in Hole M0002A is observed just above the color change corresponding to the boundary between Lithological Subunits 1/4 and 1/5 in Core section –44X-1. The foraminiferal record of Hole M0002A consists entirely of agglutinated benthic species, largely sparse assemblages containing Cyclammina pusilla and Alveolophragmium polarensis. The faunal succession in Hole M0002A is subdivided into three assemblages based on the stratigraphic
ranges of characteristic taxa: (1) a relatively diverse assemblage at the base of Lithological Subunit 1/4 (Cores 44X-1 to –38X), with abundant agglutinated foraminifera including Reticulophragmium pusillum and Ammolagena clavata, indicating connections with the
North Atlantic. This assemblage displays the best preservation, which is here attributed to higher concentrations of dissolved silica in pore waters (2) A less diverse assemblage characterized by Alveolophragmium polarensis with Adercotryma agterbergi, in the lower
part of Lithological Subunit 1/3 (Cores –38X to –35X); (3) a sparse residual assemblage within Lithological Subunit 1/3 with Rhabdammina spp., A. polarensis and R. pusillum indicating poor preservation of organically-cemented DWAF in Cores –34X to –10X.
A comparison of the DWAF assemblages from the Lomonosov Ridge with previously studied Miocene assemblages from ODP
Hole 909C in the Fram Strait, Norwegian-Greenland Sea (Kaminski et al. 2005), suggests that the inflow of Atlantic intermediate water into the Arctic Ocean began prior to 17.5 Ma
Michael Rodriguez interviews historian and author Keith Widder
No full textHistorian and author Keith Widder talks about his move to Michigan from Wisconsin, his career as Curator of History for the Mackinac Island State Park Commission, his research interests, his book "Michigan Agricultural College", and his current projects. Widder is interviewed by Michigan State University Librarian Michael Rodriguez for the MSU Libraries' Michigan Writers Series. Held in the MSU Main Library
Male reproductive health disorders among Aboriginal and Torres Strait Islander men: a hidden problem?
No full textFree to read on journal website (may need to create free account first)\ud
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OBJECTIVE: \ud
To better understand help-seeking behaviours and reproductive health disorders among Aboriginal and Torres Strait Islander men.\ud
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DESIGN, SETTING AND PARTICIPANTS: \ud
A cross-sectional mixed-methods study conducted from 1 May 2004 to 30 April 2005 of 293 Aboriginal and Torres Strait Islander men aged 18 years and over from urban, rural and remote communities in the Northern Territory and Queensland.\ud
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MAIN OUTCOME MEASURES: \ud
Subscale of the International Index of Erectile Function, self-reported help-seeking behaviours for erectile dysfunction (ED) and prostate disease, thematic analysis of semi-structured interviews and focus groups.\ud
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RESULTS: \ud
The prevalence of moderate-to-severe ED increased across age groups, from about 10% in younger men (under 35 years) to 28% in men aged 55-74 years. Moderate-to-severe ED was strongly associated with reporting a chronic condition (odds ratio [OR], 3.67) and residing in a remote area (OR, 2.94). Aboriginal and Torres Strait Islander men aged 40-59 years showed similar low levels of help-seeking behaviours compared with non-Indigenous men from a comparable population-based study. About half of the men with ED saw a doctor or received treatment for ED in each population. While prostate cancer rates were low in both studies, testing for prostate problems was less frequent in Aboriginal and Torres Strait Islander men (11.4%) than in non-Indigenous men (34.1%, P < 0.001), despite similar levels of concern about prostate cancer. Barriers to help-seeking included shame, culturally inappropriate services and lack of awareness.\ud
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CONCLUSION: \ud
This study, the first to investigate reproductive health of Aboriginal and Torres Strait Islander men, found low levels of help-seeking behaviours for reproductive health disorders, with implications for missing a predictor of chronic disease and late diagnosis of prostate disease
Late glacial ice advances in the Strait of Magellan, southern Chile
No full textDuring the last glacial cycle low gradient glaciers repeatedly drained north-eastward into the Strait of Magellan and dammed extensive proglacial lakes in the central section of the strait. This paper focuses on the two most recent glacial advances in the strait, culminating over 150 and 80 km from the present ice limits. The timing of the first of the two advances has up to now, been ambiguous and depended on the interpretation of anomously older dates of 16,590-15.,800 yr BP for deglaciation at Puerto del Hambre. Here, we show there is evidence from seismic data and truncated shorelines that the Puerto del Hambre basin has been tectonically displaced and that the dates do not represent minimums for deglaciation. Several other dates show that the advance occurred sometime before 14,260 yr BP. The timing of the second advance has been investigated using a refined tephrochronology for the region, which has also enabled a palaeoshoreline and glaciolacustrine sediments to be linked to a moraine limit. 14C dating of peat and a key tephra layer, above and below the glaciolacustrine deposits, respectively suggest that the advance culminated in the Strait of Magellan between 12,010 and 10,050 yr BP
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Aboriginal and Torres Strait Islander health
No full textThe chapter introduces Aboriginal and Torres Strait Islander health and discusses the important role that Indigenous and non-Indigenous peoples can play in ‘closing the gap’ in health disparities as experienced by Aboriginal and Torres Strait Islander peoples
Complete Data and Analysis for: Effects of seed traits and dormancy break treatments on germination of four aquatic plant species
No full textThere are two data files--one for germination and one for viability--each comprising a set of seeds (each row is a seed) with measured traits, the treatments to which they were subjected (germination only) and their germination date or viability assessment. Germination trial data from the chamber and seed photos referenced in the datasets are also included. The script included will read these files into R and conduct the analyses included in the companion manuscript.This repository contains the raw data and code necessary to conduct the analyses in the companion paper.This research was supported by: the Minnesota Environmental and Natural Resources Trust Fund as recommended by the Minnesota Aquatic Invasive Species Research Center and the Legislative-Citizen Commission on Minnesota Resources (M.V., D.L.); the Undergraduate Research Opportunities Program at the University of Minnesota (J.B.); the National Science Foundation (M.V., Graduate Research Fellowship Program [Grant No. CON-75851, project 00074041]); and the USDA National Institute of Food and Agriculture through the Minnesota Agricultural Experiment Station (D.L.). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.Verhoeven, Michael R; Bacon, Jonah A; Larkin, Daniel J. (2023). Complete Data and Analysis for: Effects of seed traits and dormancy break treatments on germination of four aquatic plant species. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/nv5v-6d63
Forecast of July 2015—New Jersey: prospects for the long term
No full textThe July 2015 R/ECON forecast shows more rapid growth for the state in 2015 than in 2014. Nonagricultural employment rose by 0.7 percent—or 27,700 jobs in 2014—after growth of 1.2 percent or 45,100 jobs in 2013. Growth will improve to 1.1 percent in 2015 and 2016 and then average 0.8 percent over the rest of the forecast period, which goes through 2045. At these rates the job base will return to the peak level reached in the first quarter of 2008 in mid-2017. By the end of the forecast period in 2045 the employment base will be nearly a million jobs, and 23 percent, greater than its level at the peak.1 These projections assume no specific recession/recovery cycle disrupts the state’s or nation’s growth. Although this seems rather far-fetched given that the average business cycle (peak to peak) in the U.S. since World War II has lasted about 24 quarters and the current cycle is now in its seventh year, a caveat to keep in mind is that this is a long term TREND forecast; it does not purport to indicate at what point(s) CYCLES may occur.Rutgers Economic Advisory Service (R/ECON) quarterly repor
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