4,093 research outputs found
in the Atlantic Ocean
Get PDFThe anthropogenic CO2 in the Atlantic Ocean is separated from the large natural variability of dissolved inorganic carbon using the method developed by Gruber et al. [1996]. Surface concentrations of anthropogenic CO2 are found to be highest in the tropical to subtropical regions and to decrease toward the high latitudes. They are very close to what is expected from thermodynamic considerations assuming that the surface ocean followed the atmospheric CO2 perturbation. Highest specific inventories (inventory per square meter) of anthropogenic CO2 occur in the subtropical convergence zones. Large differences exist between the North and South Atlantic high latitudes: In the North Atlantic, anthropogenic CO2 has already invaded deeply into the interior; north of 50°N it has even reached the bottom. By contrast, waters south of 50°S contain relatively little anthropogenic CO2, and hence specific inventories are very low. An anthropogenic CO2 inventory of about 22 ± 5 Gt C is estimated for the Atlantic north of the equator for 1982, and 18 ± 4 Gt C is estimated for the Atlantic south of the equator for 1989. The Princeton ocean biogeochemistry model predicts anthropogenic CO2 inventories of 20.0 Gt C (North Atlantic, 1982) and 17.7 Gt C (South Atlantic, 1989) for the same regions in good agreement with the observed inventories. Important differences exist on a more regional scale, associated with known deficiencies of the model
The North is another country. by Nicolas Rothwell
No full texttag=1 data=The North is another country. by Nicolas Rothwell
tag=2 data=Rothwell, Nicolas
tag=3 data=Australian Magazine,
tag=6 data=16/17 November 1996
tag=7 data=20-33.
tag=8 data=NT%TOURISM
tag=10 data=Worse, better, stranger, wilder, but above all different from the rest of the country. Continuing his journey of discovery across Australia's Top half the author stops over in Darwin to hear all the truths and whispers about the North.
tag=11 data=1996/2/8
tag=12 data=96/0316
tag=13 data=CABWorse, better, stranger, wilder, but above all different from the rest of the country. Continuing his journey of discovery across Australia's Top half the author stops over in Darwin to hear all the truths and whispers about the North
Aspects of the marine carbon and nitrogen cycles and their perturbation by mankind: Combining observations and models
No full textInterannual Variability in the North Atlantic Ocean Carbon Sink
No full textThe North Atlantic is believed to represent the largest ocean sink for atmospheric carbon dioxide in the Northern Hemisphere, yet little is known about its temporal variability. We report an 18-year time series of upper-ocean inorganic carbon observations from the northwestern subtropical North Atlantic near Bermuda that indicates substantial variability in this sink. We deduce that the carbon variability at this site is largely driven by variations in winter mixed-layer depths and by sea surface temperature anomalies. Because these variations tend to occur in a basinwide coordinated pattern associated with the North Atlantic Oscillation, it is plausible that the entire North Atlantic Ocean may vary in concert, resulting in a variability of the strength of the North Atlantic carbon sink of about ±0.3 petagrams of carbon per year (1 petagram = 1015grams) or nearly ±50%. This extrapolation is supported by basin-wide estimates from atmospheric carbon dioxide inversions
On the relationships between primary, net community, and export production in subtropical gyres
Get PDFIt has been proposed that net primary production (NPP), net community production (NCP), particulate organic carbon export (?POC) and the relationships among them are governed by local environmental conditions that favor either a microbially dominated assemblage leading to a regeneration loop (low ratio of ?POC to NPP) or a system dominated by large plankton with export pathway characteristics (high ratio of ?POC to NPP). We analyze more than 10 years of data from two subtropical time-series stations (Hawaii Ocean Times-series (HOT) in the North Pacific, and Bermuda Atlantic Time-Series (BATS) in the North Atlantic) in order to investigate this regeneration loop versus export pathway hypothesis and in particular to test the idea that the switch between the two is controlled by enhanced input of nutrients. In the decadal long-term mean, the relationships between NPP, ?POC and NCP, which we take here as a proxy for export production, reveal export pathway characteristics at BATS, while HOT is dominated by the regeneration loop. This difference is consistent with the stronger seasonal forcing at BATS and the resulting higher new nutrient input. However, these characteristics are only valid for parts of the year. Especially at BATS, the export pathway exists only in spring and the system reverts to a regeneration loop in summer and fall. This is consistent with our hypothesis given the strong summer-time stratification and the resulting low levels of new nutrient input. On interannual time-scales, we find little evidence for statistically significant alterations of the long-term mean characteristics, a finding we ascribe to a combination of limited magnitude of forcing, length of the data records, and possibly an inherent lack of predictability. A comparison of our results for the ratio between NCP and NPP (e-ratio) and the ratio between ?POC and NPP (pe-ratio) with those predicted by the models of Laws et al. [Temperature effects on export production in the open ocean. Global Biogeochemical Cycles 14(4), 1231–1246] and Dunne et al. [Empirical and mechanistic models for particle export ratio. Global Biogeochemical Cycles 19, GB4026] respectively, show reasonable agreement for the long-term mean, but these models fail to capture the observed interannual variability in these ratios
Grace S. Fong, Herself an Author : Gender, Agency, and Writing in Late Imperial China, 2008
No full textZufferey Nicolas. Grace S. Fong, Herself an Author : Gender, Agency, and Writing in Late Imperial China, 2008. In: Études chinoises, n°28, 2009. Numéro spécial sur le droit chinois. pp. 243-247
New Necklaces: 400 Designs in Contemporary Jewellery
No full textAfter the successful New Rings and New Earrings, New Necklaces is the third book curated by jeweller and author Nicolas Estrada, from classic forms and materials to the most daring, experimental and surprising ideas, each of the 500 necklaces included in this book has something that makes it unique and relates strongly to today's social, cultural and artistic reality. With prefaces by German jeweller Julia Wild and Leo Caballero, owner of the Barcelona gallery Klimt 02, specialised in contemporary jewellers
Du lieu de production à la production des lieux : histoire socio-matérielle de la brasserie Gruber dans son contexte territorial
No full textCan a metabolic perspective provide new narratives about modern urban development? In this article, we propose to retrace the joint history of the Gruber brewery and its territorial context. By bringing together different territorial scales, the factory asserted itself as one of the most important industrial breweries at the turn of the 20th century in Alsace. This occurred alongside changes in the materializations and uses of the suburb in which it was established. Through a socio-material study of its metabolism, the aim is to understand how the Gruber factory characterizes a double transformation process of its environment, both in terms of consumption (raw materials, labor force) and production (uses, sociabilities and spatialities)
How Did I Get to Princess Margaret? (And How Did I Get Her to the World Wide Web?)
No full textThe paper explores the growing use of
tools from the arts and humanities for investigation
and dissemination of social science research.
Emerging spaces for knowledge transfer, such as
the World Wide Web, are explored as outlets for
"performative social science". Questions of ethnics
and questions of evaluation which emerge from
performative social science and the use of new
technologies are discussed. Contemporary thinking
in aesthetics is explored to answer questions
of evaluation. The use of the Internet for productions
is proposed as supporting the collective
elaboration of meaning supported by Relational
Aesthetics.
One solution to the ethical problem of performing
the narrations of others is the use of the writer's
own story as autoethnography. The author queries
autoethnography's tendency to tell "sad" stories and
proposes an amusing story, exemplified by "The
One about Princess Margaret" (see Appendix).
The conclusion is reached that the free and open
environment of the Internet sidelines the usual
tediousness of academic publishing and begins to
explore new answers to questions posed about
the evaluation and ethics of performative social
science
Will marine productivity wane?
No full textA model study points to slow but extensive nutrient removal from the surface ocean under long-term climate change</jats:p
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