Search results for "Ocean"

Of whales and men: Caitríona O’Reilly’s septentrional voyage in “The Sea Cabinet” (2006)

2021

International audience; The title-poem of Caitríona O’Reilly’s second collection – The Sea Cabinet – is a sequence of five ekphrastic pieces paying tribute to the city of Hull’s past as a major whaling port. As she perambulates through the galleries of the Maritime Museum, the Irish poetess is inspired by all the paraphernalia on display: skeletons of various species of whales, whaler’s tools but also journals, logbooks, paintings, illustrations and hundreds of examples of the folk art and mythemes of the whaler. From one poem to the next, O’Reilly depicts the northernness of the Arctic Ocean as eery but bewitching otherness, focusing on illustrations of Captain Graville’s whaling ship ice-…

A simple method for estimating downward longwave radiation from surface and satellite data by clear sky

1990

Abstract An attempt to derive downward longwave radiation at the surface in clear sky conditions is presented. A method that integrates satellite-measured infrared radiation temperatures with ground measurements of water vapour pressure is applied to Meteosat data. Satellite-derived fluxes are compared with corresponding ground-measured fluxes at three different sites in France and during various seasons. Comparison of the daily averaged fluxes shows a correlation coefficient of 0–88 and an r.m.s. difference between satellite estimates and ground measurements of 12 Wm-2.

Distribution and sources of bulk organic matter (OM) on a tropical intertidal mud bank in French Guiana from elemental and isotopic proxies

2014

International audience; The mobile French Guiana coast is a shoreface region downdrift of the Amazon River, where enormous quantities of inorganic and organic materials are exchanged with the Atlantic Ocean. The rapid accumulation of these materials forms highly unstable shore-attached mud banks, which can be temporally emerged and then rapidly colonized and stabilized by microphytobenthos and opportunistic mangroves (i.e. Avicennia germinans). Mud banks are preferential sites for the accumulation and significant remineralization of organic matter (OM) due to intense erosion/deposition cycles and potential biological colonization. The distribution and sources of bulk sedimentary OM were cha…

Could the acid-base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification?

2015

13 pages; International audience; Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Calcifying organisms are expected to be highly impacted by the decrease in the oceans' pH and carbonate ions concentration. In particular, sea urchins, members of the phylum Echinodermata, are hypothesized to be at risk due to their high-magnesium calcite skeleton. However, tolerance to ocean acidification in metazoans is first linked to acid–base regulation capacities of the extracellular fluids. No infor…

Using natural analogues to investigate the effects of climate change and ocean acidification on Northern ecosystems

2018

AbstractNorthern oceans are in a state of rapid transition. Still, our knowledge of the likely effects of climate change and ocean acidification on key species in the food web, functionally important habitats and the structure of Arctic and sub-Arctic ecosystems is limited and based mainly on short-term laboratory studies on single species. This review discusses how tropical and temperate natural analogues of carbonate chemistry drivers, such as CO2 vents, have been used to further our knowledge of the sensitivity of biological systems to predicted climate change, and thus assess the capacity of different species to show long-term acclimation and adaptation to elevated levels of pCO2. Natur…

l'Italia degli "ancora no": la ricerca delle origini e l'adozione aperta

2017

L’apertura e il diritto dei bambini a sapere sulla loro provenienza genetica sono diventate questioni chiave nei dibattiti circa l'adozione e un significativo cambiamento verso la trasparenza ha preso luogo nel contesto politico italiano. Ma l'ipotesi sulla possibilità di adozione aperta trova ancora vincoli e limitazioni evidenti nella legge di adozione italiana, che tutela il diritto della madre all'anonimato, anziché il diritto di origine e l'identità dei bambini. Tuttavia, recenti ricerche hanno dimostrato l'importanza di parlare attraverso l'apertura in caso di adozione, vale a dire l'atteggiamento della vita familiare a comunicare con onestà e sincerità riguardo la biologia e biografi…

Effects of the air density value on a wind generator electricity production capability

2016

The paper main issue is the evaluation of the influence of the air density value on the electricity production capability of a wind generator. Two different density air mathematical models, where the density has not a constant value, are here taken into account and compared in terms of reliability, accuracy and computational burden. Evaluations are carried out thanks to a horizontal axis wind generator full model built by the Authors in Matlab/Simulink environment. Simulation results are compared with real data.

CAROLS: A New Airborne L-Band Radiometer for Ocean Surface and Land Observations

2011

The "Cooperative Airborne Radiometer for Ocean and Land Studies" (CAROLS) L-Band radiometer was designed and built as a copy of the EMIRAD II radiometer constructed by the Technical University of Denmark team. It is a fully polarimetric and direct sampling correlation radiometer. It is installed on board a dedicated French ATR42 research aircraft, in conjunction with other airborne instruments (C-Band scatterometer--STORM, the GOLD-RTR GPS system, the infrared CIMEL radiometer and a visible wavelength camera). Following initial laboratory qualifications, three airborne campaigns involving 21 flights were carried out over South West France, the Valencia site and the Bay of Biscay (Atlantic O…

ANTIMICROBIAL AND ANTIBIOFILM ACTIVITY OF A PEPTIDE IDENTIFIED IN THE SEAGRASS POSIDONIA OCEANICA

2022

The bending triad of the quasi-spherical top molecule SO2F2 in the 550 cm(-1) region

2006

International audience; The analysis of the v(3)/v(7)/v(9) bending triad of SO2F2 has been recently performed with the Watson's Hamiltonian up to octic terms employing 79 rovibrational parameters but including only the first order Coriolis interaction terms, fixed to ab initio values [H. Burger, J. Demaison, F. Hegelund, L. Margules, I. Merke, J. Mol. Struct. 612 (2002) 133-141]. Since SO2F2 is a quasi-spherical top, it can also be considered as derived from the SO42- sulfate ion. We have thus developed a new tensorial formalism in the O(3) > Td > C2v group chain [M. Rotger, V. Boudon, M. Loete, J. Mol. Spectrosc. 216 (2002) 297-307]. This approach allows a systematic development of rovibra…