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Les Variations Climatiques Des Derniers 30 000 Ans Et Leur Influence Sur Levolution Des Systemes Cotiers Du Nord De Portugal
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Book Synopsis Les variations climatiques des derniers 30 000 ans et leur influence sur l'évolution des systèmes côtiers du nord de Portugal by : Filipa Naughton
Download or read book Les variations climatiques des derniers 30 000 ans et leur influence sur l'évolution des systèmes côtiers du nord de Portugal written by Filipa Naughton and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Le principal objectif ce cette thèse est de caractériser la variabilité climatique des moyennes latitudes de l'Atlantique Nord oriental qui a eu lieu durant les derniers 30 000 ans. Cette thèse traite aussi de l'impact de la variabilité climatique sur l'évolution des systèmes côtiers au cours de l'Holocène. Pour cela une étude multiproxy (pollen, assemblages de foraminifères planctoniques b18O, alcénones) à été réalisée à partir de deux carottes marines profondes du nord-ouest de la marge ibérique, deux carottes de l'estuaire du Douro, et d'une carotte marine de la plateforme continentale nord(ouest française. Cette thèse discute des mécanismes à l'origine de la réponse complexe observée dans ces latitudes moyennes au cours des événements d'Heinrich 4,3, 2 et 1 et durant le dernier Maximun Glaciaire ainsi que de la déglaciation et l'Holocène. Finalement, elle propose un modèle conceptuel pour expliquer les variations géomorphologues de l'estuaire du Douro qui a lieu au cours de l'Holocène.
Book Synopsis Oceans and the Atmospheric Carbon Content by : Pedro Duarte
Download or read book Oceans and the Atmospheric Carbon Content written by Pedro Duarte and published by Springer Science & Business Media. This book was released on 2010-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oceans and the Atmospheric Carbon Content, presents an interdisciplinary overview of the role of the oceans as a carbon sink and its relation with pH increasing trends and climate change. This volume discusses topics such as: climate variability during the last deglaciation, based on a high-resolution pollen analysis; the potential impact of CO2 from large metropolitan areas over the adjacent coastal zones and the importance of having high resolution atmospheric CO2 data to estimate accurately air-sea CO2 exchanges; present- day CO2 fluxes in the coastal ocean and their potential feedbacks under global climate change; phytoplankton community responses to climate change with emphasis on decreasing pH trends in sea water and its ecological effects; pH decrease and its effects on sea-water chemistry from a ten year time-series; the effect of acidification on metal bioaccumulation; the effects of increasing temperatures and acidification on contaminant dynamics and availability to biota; the prevention of potential environmental impacts related to the geological sequestration of CO2. The book provides an updated synthesis of current concerns related to global change trends in the oceans with a strong emphasis on acidification. The content draws attention to the importance of dealing with observed global change trends and their effects upon the oceans using an interdisciplinary approach due to their complexity and interlinks between different areas of knowledge.
Book Synopsis Des climats et des hommes by : Jean-François Berger
Download or read book Des climats et des hommes written by Jean-François Berger and published by La Découverte. This book was released on 2020-02-27 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climatologues, glaciologues, archéologues et historiens confrontent leurs travaux pour ébaucher une histoire du climat sur plusieurs millions d'années et appréhender les effets des variations climatiques sur les sociétés humaines. Les changements climatiques ont-ils favorisé le peuplement de la planète ? À quelle époque le Sahara s'est-il désertifié ? Comment les civilisations de l'Antiquité se sont-elles adaptées aux crises climatiques ? Pourquoi l'agriculture a-t-elle été possible au Groenland pendant le haut Moyen Âge ? Que nous apprennent les dates des vendanges, la récession des glaciers ou la variation des cernes de croissance des arbres à travers les siècles ? Comment les hommes se sont-ils adaptés aux fluctuations incessantes du climat ? Dans cet ouvrage, climatologues, glaciologues, archéologues et historiens confrontent leurs travaux pour ébaucher une histoire du climat sur plusieurs millions d'années et appréhender les effets, parfois favorables et souvent dramatiques, des variations climatiques sur les sociétés humaines. Alors qu'aujourd'hui l'action de l'homme modifie radicalement l'environnement, la connaissance des climats du passé éclaire l'analyse des rapides changements en cours et nous aide à aborder avec lucidité les conséquences des bouleversements climatiques à venir.
Book Synopsis As variações climáticas dos últimos 30 000 anos e sua influência na evolução dos sistemas costeiros do norte de Portugal by : Filipa Naughton
Download or read book As variações climáticas dos últimos 30 000 anos e sua influência na evolução dos sistemas costeiros do norte de Portugal written by Filipa Naughton and published by . This book was released on 2007 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le principal objectif ce cette thèse est de caractériser la variabilité climatique des moyennes latitudes de l'Atlantique Nord oriental qui a eu lieu durant les derniers 30 000 ans. Cette thèse traite aussi de l'impact de la variabilité climatique sur l'évolution des systèmes côtiers au cours de l'Holocène. Pour cela une étude multiproxy (pollen, assemblages de foraminifères planctoniques b18O, alcénones) à été réalisée à partir de deux carottes marines profondes du nord-ouest de la marge ibérique, deux carottes de l'estuaire du Douro, et d'une carotte marine de la plateforme continentale nord(ouest française. Cette thèse discute des mécanismes à 'origine de la réponse complexe observée dans ces latitudes moyennes au cours des événements d'Heinrich 4,3, 2 et 1 et durant le dernier Maximun Glaciaire ainsi que de la déglaciation et l'Holocène. Finalement, elle propose un modèle conceptuel pour expliquer les variations géomorphologues de l'estuaire du Douro qui a lieu au cours de l'Holocène.
Book Synopsis Paléoclimats by : Jean-François Deconinck
Download or read book Paléoclimats written by Jean-François Deconinck and published by Vuibert. This book was released on 2015-04-01 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce livre traite de la reconstitution des climats anciens aux échelles de temps utilisées en géosciences : de la centaine de millions d'années à l'échelle des générations humaines. Après une présentation des principaux acteurs du système climatique et des supports de l'enregistrement géologique des variations climatiques, l'auteur présente les principales étapes de l'évolution du climat de la Terre. Ce nouveau manuel, outre la présence d'exercices intégralement corrigés, intègre les résultats les plus récents en matière de recherches sur les paléoclimats et porte notamment sur les récents développements de la théorie de la terre « Boule de neige », les premiers résultats du programme EPICA (European Project for Ice Coring in Antarctica) et le développement de la cyclostratigraphie (enregistrement astroclimatique). Sommaire 1. Les acteurs du climat et le système climatique - 2. Climats actuels et méthodes d'étude des paléoclimats - 3. Les périodes glaciaires - 4. Les périodes chaudes de type « greenhouse » - 5. Variations climatiques à haute fréquence - 6. Corrigés des exercices - Conclusion - Glossaire - Références bibliographiques - Index
Book Synopsis Changement climatique by : Jacques Merle
Download or read book Changement climatique written by Jacques Merle and published by Editions L'Harmattan. This book was released on 2016 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les océanographes retracent l'histoire du climat et de la climatologie, notamment en évoquant les précurseurs de cette sciences et le développement des divers outils au fil des siècles. Ils présentent le système climatique et les disciplines inhérentes au sujet et signalent les différents enjeux qu'impliquent les changements climatiques. Electre 2018
Book Synopsis CHANGEMENTS CLIMATIQUES AU COURS DES DERNIERS 30000 ANS EN AFRIQUE SUD EQUATORIALE (TANZANIE) PAR L'ETUDE DES PIGMENTS ET PHENOLS LACUSTRES by : OUASSILA. MERDACI
Download or read book CHANGEMENTS CLIMATIQUES AU COURS DES DERNIERS 30000 ANS EN AFRIQUE SUD EQUATORIALE (TANZANIE) PAR L'ETUDE DES PIGMENTS ET PHENOLS LACUSTRES written by OUASSILA. MERDACI and published by . This book was released on 1998 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA PHASE ORGANIQUE SEDIMENTAIRE DU LAC DE CRATERE MASSOKO (9\2000 S, 33\4520 E, TANZANIE DU SUD) A ETE ETUDIEE POUR RECONSTRUIRE LES PALEOENVIRONNEMENTS DEPUIS 40000 ANS BP. OUTRE LA DISTRIBUTION DU CARBONE ORGANIQUE DE L'AZOTE TOTAL ET DE LA SILICE BIOGENIQUE ONT ETE EXTRAITES ET MESUREES DEUX FRACTIONS ORGANIQUES : LES PIGMENTS, MARQUEURS DE LA PRODUCTIVITE PHYTOPLANTONIQUE ET LES PHENOLS DES LIGNINES, TRACEURS DES APPORTS PAR RUISSELLEMENT. L'EVOLUTION DE CES PARAMETRES CONDUIT AUX VARIATIONS CLIMATIQUES SUIVANTES : DE 40000 A 30000 ANS BP, LA COUVERTURE ARBOREE DICOTYLEDONE DU BASSIN VERSANT ET LA FORTE PRODUCTION LACUSTRE REVELENT UNE PERIODE DE PRECIPITATIONS IMPORTANTES. DE 30000 A 14500 ANS BP, L'ETAT TROPHIQUE SE DETERIORE ET LES PRODUITS ORGANIQUES ALLOCHTONES REFLETENT UNE COUVERTURE ARBOREE TRES OUVERTE MARQUANT UN CLIMAT PLUS SEC. A PARTIR DE 13500 ANS BP ET PENDANT TOUTE LA PERIODE QUI SEMBLE SYNCHRONE AU BLLING-ALLERD, LES CONDITIONS DE PLUVIOSITE SE RETABLISSENT, LA COUVERTURE ARBOREE SE DEVELOPPE DE NOUVEAU ET LA PRODUCTIVITE DU LAC S'AMELIORE. LA TRANSITION PLEISTOCENE SUPERIEUR-HOLOCENE EST IMMEDIATEMENT SUIVIE PAR UNE COURTE PERIODE DE SECHERESSE RELATIVE ENTRE 11500 ET 10500 ANS BP, OU L'OLIGOTROPHIE EST ACCOMPAGNEE PAR UN DEVELOPPEMENT D'UN TAPIS GRAMINNEEN. PENDANT L'HOLOCENE INFERIEUR, JUSQU'A 5500 ANS BP, LES ARBRES SE REINSTALLENT ET LA PRODUCTIVITE LACUSTRE S'ACCROIT DE NOUVEAU, SIGNE DE CONDITIONS PLUS HUMIDES. DURANT LES DERNIERS 4000 ANS BP, LA CHUTE PROGRESSIVE DE PRODUCTIVITE ET L'ECLAIRCISSEMENT DE LA VEGETATION TEMOIGNENT D'UN FAIBLE RUISSELLEMENT LIE A UNE DIMINUTION DES PRECIPITATIONS. LE CHANGEMENT MAJEUR DE L'HOLOCENE SUPERIEUR, A 1500 ANS BP EST D'ORIGINE CLIMATIQUE MAIS SERAIT AUSSI LIE A L'ACTIVITE HUMAINE : LA PRODUCTIVITE ET LA VEGETATION SONT AFFECTEES ET LES CONDITIONS ACTUELLES PLUS SECHES S'ETABLISSENT A PARTIR DE CET EVENEMENT.
Book Synopsis Changements climatiques au cours des 30 derniers mille ans en Afrique sud équatoriale (Tanzanie) par l'étude des pigments et phénols sédimentaires lacustres by : Ouassila Merdaci
Download or read book Changements climatiques au cours des 30 derniers mille ans en Afrique sud équatoriale (Tanzanie) par l'étude des pigments et phénols sédimentaires lacustres written by Ouassila Merdaci and published by . This book was released on 1998 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA PHASE ORGANIQUE SEDIMENTAIRE DU LAC DE CRATERE MASSOKO (9\2000 S, 33\4520 E, TANZANIE DU SUD) A ETE ETUDIEE POUR RECONSTRUIRE LES PALEOENVIRONNEMENTS DEPUIS 40000 ANS BP. OUTRE LA DISTRIBUTION DU CARBONE ORGANIQUE DE L'AZOTE TOTAL ET DE LA SILICE BIOGENIQUE ONT ETE EXTRAITES ET MESUREES DEUX FRACTIONS ORGANIQUES : LES PIGMENTS, MARQUEURS DE LA PRODUCTIVITE PHYTOPLANTONIQUE ET LES PHENOLS DES LIGNINES, TRACEURS DES APPORTS PAR RUISSELLEMENT. L'EVOLUTION DE CES PARAMETRES CONDUIT AUX VARIATIONS CLIMATIQUES SUIVANTES : DE 40000 A 30000 ANS BP, LA COUVERTURE ARBOREE DICOTYLEDONE DU BASSIN VERSANT ET LA FORTE PRODUCTION LACUSTRE REVELENT UNE PERIODE DE PRECIPITATIONS IMPORTANTES. DE 30000 A 14500 ANS BP, L'ETAT TROPHIQUE SE DETERIORE ET LES PRODUITS ORGANIQUES ALLOCHTONES REFLETENT UNE COUVERTURE ARBOREE TRES OUVERTE MARQUANT UN CLIMAT PLUS SEC. A PARTIR DE 13500 ANS BP ET PENDANT TOUTE LA PERIODE QUI SEMBLE SYNCHRONE AU BLLING-ALLERD, LES CONDITIONS DE PLUVIOSITE SE RETABLISSENT, LA COUVERTURE ARBOREE SE DEVELOPPE DE NOUVEAU ET LA PRODUCTIVITE DU LAC S'AMELIORE. LA TRANSITION PLEISTOCENE SUPERIEUR-HOLOCENE EST IMMEDIATEMENT SUIVIE PAR UNE COURTE PERIODE DE SECHERESSE RELATIVE ENTRE 11500 ET 10500 ANS BP, OU L'OLIGOTROPHIE EST ACCOMPAGNEE PAR UN DEVELOPPEMENT D'UN TAPIS GRAMINNEEN. PENDANT L'HOLOCENE INFERIEUR, JUSQU'A 5500 ANS BP, LES ARBRES SE REINSTALLENT ET LA PRODUCTIVITE LACUSTRE S'ACCROIT DE NOUVEAU, SIGNE DE CONDITIONS PLUS HUMIDES. DURANT LES DERNIERS 4000 ANS BP, LA CHUTE PROGRESSIVE DE PRODUCTIVITE ET L'ECLAIRCISSEMENT DE LA VEGETATION TEMOIGNENT D'UN FAIBLE RUISSELLEMENT LIE A UNE DIMINUTION DES PRECIPITATIONS. LE CHANGEMENT MAJEUR DE L'HOLOCENE SUPERIEUR, A 1500 ANS BP EST D'ORIGINE CLIMATIQUE MAIS SERAIT AUSSI LIE A L'ACTIVITE HUMAINE : LA PRODUCTIVITE ET LA VEGETATION SONT AFFECTEES ET LES CONDITIONS ACTUELLES PLUS SECHES S'ETABLISSENT A PARTIR DE CET EVENEMENT.
Book Synopsis The Mediterranean region under climate change by : Collectif
Download or read book The Mediterranean region under climate change written by Collectif and published by IRD Éditions. This book was released on 2018-11-19 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.
Book Synopsis On Behalf of My Delegation-- by : Joyeeta Gupta
Download or read book On Behalf of My Delegation-- written by Joyeeta Gupta and published by . This book was released on 2000 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Past Climate Variability through Europe and Africa by : Richard W. Battarbee
Download or read book Past Climate Variability through Europe and Africa written by Richard W. Battarbee and published by Springer Science & Business Media. This book was released on 2004-12-03 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on two complementary time-scales, the Holocene (approximately the last 11,500 years) and the last glacial-interglacial cycle (approximately the last 130,000 years) to synthesize evidence of climate variability at the regional and continental scale across Europe and Africa. This is the first examination of historical climate variations at such a scale, and thus sets a benchmark for future research.
Download or read book MEGA-CRISES written by Ira Helsloot and published by Charles C Thomas Publisher. This book was released on 2012-08-01 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live in turbulent times with continents and nations facing ever-heightening risks such as natural disasters, intense and protracted conflicts, terrorism, corporate crises, cyber threats to infrastructures and mega-events. We are witnessing the rise of mega-crises and a new class of adversity with many unknowns. The prospect of mega-crises presents professionals and students in the field of crisis management with four major tasks. First, they should engage in “deep thinking” about the causes of the increasing occurrence of mega-crises. Second, they should identify and work through the dominant trends which complicate contemporary crisis management. Third, they should upgrade institutional crisis management capacity. Fourth, they should improve societal resilience since no institutional complex can mitigate or manage these mega-crisis on its own. This book is divided into four primary parts, each of which looks at one facet of mega-crises. Part I focuses on the concept of a mega-crisis and mega-crisis management; Part II examines crisis management of mega-natural disasters; Part III evaluates crisis management of man-made mega-crises; and Part IV identifies mega-threats and vulnerabilities. Additional major topics include Hurricane Katrina; Hurricane Gustav; the London Bombings; the Mumbai Terrorist Attacks of July 7, 2005; corporate meltdowns; the subprime crisis; the Olympic Games; electricity grids; global climate change; the Dutch Delta; risks to food security; and mega-crises and the Internet. This comprehensive text will provide practitioners and academics with the results of an across-the-board research effort in the prospects, nature, characteristics, and the effects of mega-crises.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251305536 Total Pages :435 pages Book Rating :4.2/5 (513 download)
Book Synopsis Regional Conference on building a future for sustainable small-scale fisheries in the Mediterranean and the Black Sea by : Food and Agriculture Organization of the United Nations
Download or read book Regional Conference on building a future for sustainable small-scale fisheries in the Mediterranean and the Black Sea written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-10-31 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the report, the conference focused on the main challenges for the sustainable development of small-scale fisheries, including promoting political commitment and tailored strategies, raising awareness, and sharing knowledge.
Book Synopsis Africa from the Sixteenth to the Eighteenth Century by : Bethwell A. Ogot
Download or read book Africa from the Sixteenth to the Eighteenth Century written by Bethwell A. Ogot and published by Univ of California Press. This book was released on 1992 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: The result of years of work by scholars from all over the world, The UNESCO General History of Africa reflects how the different peoples of Africa view their civilizations and shows the historical relationships between the various parts of the continent. Historical connections with other continents demonstrate Africa's contribution to the development of human civilization. Each volume is lavishly illustrated and contains a comprehensive bibliography. This fifth volume of the acclaimed series covers the history of the continent from the beginning of the sixteenth century to the close of the eighteenth century in which two themes emerge: first, the continuing internal evolution of the states and cultures of Africa during this period second, the increasing involvement of Africa in external trade--with major but unforeseen consequences for the whole world. In North Africa, we see the Ottomans conquer Egypt. South of the Sahara, some of the larger, older states collapse, and new power bases emerge. Traditional religions continue to coexist with both Christianity (suffering setbacks) and Islam (in the ascendancy). Along the coast, particularly of West Africa, Europeans establish a trading network which, with the development of New World plantation agriculture, becomes the focus of the international slave trade. The immediate consequences of this trade for Africa are explored, and it is argued that the long-term global consequences include the foundation of the present world-economy with all its built-in inequalities.
Book Synopsis Biological Invasions in Europe and the Mediterranean Basin by : F. di Castri
Download or read book Biological Invasions in Europe and the Mediterranean Basin written by F. di Castri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: In view of the massive change in the area of distribution of many world biota across classical biogeographical realms, and of the drastic restructuring of the biotic components of numerous ecosystems, the Scientific Committee on Problems of the Environment (SCOPE) decided at its general Assembly in Ottawa, Canada, in 1982 to launch a project on the 'Ecology of Biological Invasions'. Several regional meetings were subsequently organized within the framework of SCOPE, in order to single out the peculiarities of the invasions that took place in each region, the behaviour of their invasive species and the invasibility of their ecosystems. Most noteworthy among such workshops were one in Australia in August 1984, one concerning North America and Hawaii in October 1984, and one dealing with southern Africa in November 1985. A leitmotiv of these workshops was that most of the invasive species to those regions were emanating from Europe and the Mediterranean Basin, inadvertently or intentionally introduced by man. It was therefore considered as a timely endeavour to organize the next regional meeting in relation to this region. The workshop on 'Biological Invasions in Europe and the Mediterranean Basin' was held in Montpellier, France, 21 to 23 May 1986, thanks to the financial support of SCOPE and of the A.W. Mellon Foundation, and the logistic facilities of the Centre National de la Recherche Scientifique (C.N .R.S.).
Download or read book Nature Conservation written by Dan Gafta and published by Springer Science & Business Media. This book was released on 2007-02-15 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a multi-disciplinary coverage of the broad fields of species, community and landscape conservation. The panel of contributors consider a range of topics in vegetation and biodiversity assessment, planning and management of conservation zones and protected areas, together with historical and social/legal issues of the environment and nature conservation. The book celebrates the life’s work of Professor Franco Pedrotti.
Author :Unesco. International Scientific Committee for the Drafting of a General History of Africa Publisher :Univ of California Press ISBN 13 :9780520067035 Total Pages :1076 pages Book Rating :4.0/5 (67 download)
Book Synopsis Africa Since 1935 by : Unesco. International Scientific Committee for the Drafting of a General History of Africa
Download or read book Africa Since 1935 written by Unesco. International Scientific Committee for the Drafting of a General History of Africa and published by Univ of California Press. This book was released on 1999 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hardcover edition of volume 8 was published in 1994. This paperback edition is the eighth and final volume to be published in the UNESCO General History of Africa. Volume 8 examines the period from 1935 to the present, and details the role of African states in the Second World War and the rise of postwar Africa. This is one of the most important books in the entire series, and as such, it is an unabridged paperback.
