Journal articles: 'Climat quaternaire'

1

Vimeux, Françoise. "Les glaciers andins : une mémoire du climat tropical." Quaternaire, no. 28/2 (May 29, 2017): 247–52. http://dx.doi.org/10.4000/quaternaire.8096.

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Touzeau, Alexandra, Christophe Lécuyer, and Romain Amiot. "Evolution du climat et du régime alimentaire pendant l’Egypte ancienne." Quaternaire, no. 28/2 (May 29, 2017): 285–93. http://dx.doi.org/10.4000/quaternaire.8201.

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Orain, Ronan, Vincent Lebreton, Elda Russo Ermolli, Pietro Aucelli, and Vincenzo Amato. "Végétation et climat au pléistocène moyen en Italie méridionale (bassin de Boiano, Molise)." Quaternaire, no. 23/1 (March 1, 2012): 37–48. http://dx.doi.org/10.4000/quaternaire.6154.

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Jouzel, Jean, Claude Lorius, and Dominique Raynaud. "Climat et atmosphère au Quaternaire : de nouveaux carottages glaciaires." Comptes Rendus Palevol 5, no. 1-2 (2006): 45–55. http://dx.doi.org/10.1016/j.crpv.2005.09.013.

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5

Desprat, Stéphanie, Dulce Oliveira, Filipa Naughton, and Maria Fernanda Sánchez Goñi. "L’étude du pollen des séquences sédimentaires marines pour la compréhension du climat : l’exemple des périodes chaudes passées." Quaternaire, no. 28/2 (May 29, 2017): 259–69. http://dx.doi.org/10.4000/quaternaire.8102.

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6

Berger, André. "Les causes astronomiques des grandes variations du climat au Quaternaire." Comptes Rendus Palevol 5, no. 1-2 (2006): 21–26. http://dx.doi.org/10.1016/j.crpv.2005.09.009.

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Sánchez Goňi, María Fernanda. "Interactions végétation-climat au cours des derniers 425.000 ans en Europe occidentale. Le message du pollen des archives marines." Quaternaire, no. 17/1 (March 1, 2006): 3–25. http://dx.doi.org/10.4000/quaternaire.585.

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8

Landais, Amaëlle. "Reconstruction du climat et de l’environnement des derniers 800 000 ans à partir des carottes de glace – variabilité orbitale et millénaire." Quaternaire, Vol. 27/3 (September 1, 2016): 197–212. http://dx.doi.org/10.4000/quaternaire.7664.

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Parrenin, Frédéric, and Amaëlle Landais. "La datation des archives glaciaires." La Météorologie, no. 110 (2020): 018. http://dx.doi.org/10.37053/lameteorologie-2020-0070.

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Les glaces en Antarctique et au Groenland sont une archive de premier plan pour reconstruire le climat du Quaternaire. Une datation précise est nécessaire pour exploiter cette archive. Les méthodes de datation peuvent être tirées de l'analyse de la glace, des bulles d'air piégées, de la comparaison à d'autres archives ou aux variations des paramètres orbitaux de la Terre, ou de la modélisation du processus de sédimentation glaciaire. Ces méthodes étant complémentaires, un modèle probabiliste a été développé pour les combiner de manière optimale. Ice samplings from Antarctica or Greenland form an exceptional archive to reconstruct the Quaternary climate. An accurate chronology is necessary to exploit this archive. Dating methods can be derived from the analysis of ice, or enclosed air bubbles, from the comparison to other archives or to variations of orbital parameters of the Earth, or from the modelling of the glacial sedimentation process. These methods being complementary, a probabilistic model has been developed to combine them in an optimal manner.

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10

Hanquet, Constance, Patricia Valensi, Salvador Bailon, et al. "Caractérisation du climat et de la biodiversité au Pléistocène moyen final,d’après les faunes de vertébrés de la grotte du Lazaret (Nice, France)." Quaternaire, no. 21/3 (September 1, 2010): 203–14. http://dx.doi.org/10.4000/quaternaire.5579.

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11

Böse, Margot. "De la morphostratigraphie à la chronostratigraphie. La géomorphologie quaternaire moderne comme fondement aux recherches sur le climat." Géomorphologie : relief, processus, environnement 20, no. 4 (2014): 304–6. http://dx.doi.org/10.4000/geomorphologie.10752.

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12

Holtzapffel, T., and H. Chamley. "Les smectites latées du domaine Atlantique depuis le Jurassique superieur: gisement et signification." Clay Minerals 21, no. 2 (1986): 133–48. http://dx.doi.org/10.1180/claymin.1986.021.2.03.

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ResumeL'étude concerne 225 échantillons d'âge Jurassique à actuel de l'Océan Atlantique. La comparaison de l'abondance des smectites lattées, estimée sur micrographies électroniques, et de divers paramètres des sédiments, apporte des informations nouvelles sur la genèse et la signification de ces minéraux dans des sédiments non volcanoclastiques et non remainés. L'élaboration des smectites lattées par recristallisation diagénétique de smectites détritiques est favorisée lorsque la microperméabilité du sédiment est réduite (argiles fibreuses et particules calcaires, surtout les foraminifères, peu abondantes); lorsque les échanges chimiques à bilan constant avec le milieu interstitiel sont facilités (smectites abondantes) et lorsque la vitesse de dépôt est faible à moyenne. Dans les autres cas, la recristallisation de smectites lattées est très réduite ou absente. L'identification de ces minéraux dans les sédiments permet de préciser les conditions paléogéographiques de dépôt. La rareté des smectites lattées au Plio—Quaternaire pourrait être liée à l'extension des grands refroidissements mondiaux du climat.

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Clet, Martine, and Serge Occhietti. "La sous-séquence des sédiments de Saint-Pierre — rythmites du Saint-Maurice — Sables des Vieilles-Forges, Pléistocène supérieur, vallée du Saint-Laurent, Québec." Géographie physique et Quaternaire 50, no. 3 (2007): 287–310. http://dx.doi.org/10.7202/033101ar.

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RÉSUMÉLe Quaternaire de la vallée et de l'estuaire moyen du Saint-Laurent est caractérisé par des séquences sédimentaires emboîtées. La séquence supérieure est la mieux représentée. Elle comprend des dépôts non glaciaires inférieurs, associés notamment à l'Interstade des Becquets, le Till wisconsinien de Gentilly et les sédiments des mers de Champlain et de Goldthwait. La base de cette séquence est emboîtée dans l'Argile de La Pérade (Mer de Cartier, Sangamonien supérieur) dont le contenu pollinique témoigne de la recolonisation végétale des surfaces déglacées et d'un bref épisode de réchauffement avant l'implantation de la forêt boréale. Au-dessus de la surface d'emboîtement, les Sédiments fluviatiles de Saint-Pierre ont un contenu pollinique qui indique le maintien d'une forêt boréale. Les Rythmites du Saint-Maurice, sus-jacentes, représentent au moins 1000 ans de sédimentation dans le Lac de La Vérendrye. Le contenu pollinique et les macrorestes de la zone inférieure de ces rythmites indiquent l'inondation, dans les basses terres, d'une sapinière associée à des essences thermophiles plus abondantes que dans les sédiments fluviatiles antérieurs. La zone supérieure évoque le retour à une pessière avec diminution des espèces thermophiles. Au-dessus, les Sables des Vieilles-Forges comprennent trois lithozones : sable fin lacustre, sable deltaïque et dépôts proglaciaires. Leur contenu pollinique témoigne de la détérioration du climat : la forêt boréale à Picea évolue progressivement vers une toundra forestière. Les zones supérieures sont stériles. Cette palynostratigraphie permet d'établir des corrélations entre les différents sites répartis sur plus de 400 km dans la vallée du Saint-Laurent et de différencier des unités et des séquences qui semblaient similaires.

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14

Pirrung, Michael, and Bernd Zolitschka. "Quaternary climate evolution." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 156, no. 4 (2005): 497–500. http://dx.doi.org/10.1127/1860-1804/2005/0156-0497.

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15

Carré, Matthieu, and Rachid Cheddadi. "Seasonality in long-term climate change." Quaternaire, no. 28/2 (May 29, 2017): 173–77. http://dx.doi.org/10.4000/quaternaire.8018.

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16

AMERI, ISMAEL DAWOOD SULAIMAN AL. "Climate Fluctuation in Mesopotamia During the Quaternary Period." Journal of Research on the Lepidoptera 50, no. 4 (2019): 262–78. http://dx.doi.org/10.36872/lepi/v50i4/201090.

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17

Lefèvre, David. "Avant-propos : Colloque Q6 Biodiversité au Quaternaire. Climats, environnements et peuplements. Première partie." Quaternaire, no. 21/1 (March 1, 2010): 3–4. http://dx.doi.org/10.4000/quaternaire.5399.

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18

Garnett, E. R., J. E. Andrews, Richard C. Preece, and P. F. Dennis. "Late-glacial and Early Holocene climate and environment from stable isotopes in Welsh tufa." Quaternaire, no. 17/2 (June 1, 2006): 31–42. http://dx.doi.org/10.4000/quaternaire.742.

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19

Capron, Émilie, Aline Govin, and Emma J. Stone. "Recent advances on the dynamical representation and our understanding of the warmer‑than‑present last interglacial climate." Quaternaire, no. 28/2 (May 29, 2017): 185–93. http://dx.doi.org/10.4000/quaternaire.8029.

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20

Panin, Andrei, Grzegorz Adamiec, and Vladimir Filippov. "Fluvial response to proglacial effects and climate in the upper Dnieper valley (Western Russia) during the late Weichselian and the Holocene." Quaternaire, no. 26/1 (March 1, 2015): 27–48. http://dx.doi.org/10.4000/quaternaire.7141.

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21

Nichol, Janet E. "Quaternary climate and landscape development in West Africa: evidence from satellite images." Zeitschrift für Geomorphologie 42, no. 3 (1998): 329–47. http://dx.doi.org/10.1127/zfg/42/1998/329.

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22

Clet-Pellerin, Martine. "V. Lebreton, Paysages et Climats contemporains des Premiers Hominidés en Italie. Analyse pollinique des sites du Pléistocène inférieur et moyen de Ca’Belvedere di Monte Poggiolo (Forli, Emilie-Romagne) et de la Pineta (Isernia, Molise)." Quaternaire, no. 17/1 (March 1, 2006): 93. http://dx.doi.org/10.4000/quaternaire.709.

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23

Morel, Alain. "The disappearance of hot and humid climates in the southern Sahara on the Pliocene-Quaternary boundary." Zeitschrift für Geomorphologie 36, no. 2 (1992): 191–205. http://dx.doi.org/10.1127/zfg/36/1992/191.

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24

Claussen, M. "Late Quaternary vegetation – climate feedbacks*." Climate of the Past Discussions 5, no. 1 (2009): 635–70. http://dx.doi.org/10.5194/cpd-5-635-2009.

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Abstract. Feedbacks between vegetation and other components of the climate system are discussed with respect to their influence on climate dynamics during the late Quaternary, i.e., the last glacial – interglacial cycles. When weighting current understanding based on interpretation of palaeobotanic and palaeoclimatic evidence by numerical climate system models, a number of arguments speak in favour of vegetation dynamics being an amplifier of orbital forcing. (a) The vegetation – snow albedo feedback in synergy with the sea ice – albedo feedback tends to amplify Northern Hemisphere and global mean temperature changes. (b) Variations in the extent of the largest desert on Earth, the Sahara, appear to be amplified by biogeophysical feedback. (c) Biogeochemical feedbacks in the climate system in relation to vegetation migration are supposed to be negative on time scales of glacial cycles. However, with respect to changes in global mean temperature, they are presumably weaker than the positive biogeophysical feedbacks.

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25

Gauthier, John H. "Unified structure in Quaternary climate." Geophysical Research Letters 26, no. 6 (1999): 763–66. http://dx.doi.org/10.1029/1999gl900086.

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26

Claussen*, M. "Late Quaternary vegetation-climate feedbacks." Climate of the Past 5, no. 2 (2009): 203–16. http://dx.doi.org/10.5194/cp-5-203-2009.

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Abstract. Feedbacks between vegetation and other components of the climate system are discussed with respect to their influence on climate dynamics during the late Quaternary, i.e., the last glacial-interglacial cycles. When weighting current understanding based on interpretation of palaeobotanic and palaeoclimatic evidence by numerical climate system models, a number of arguments speak in favour of vegetation dynamics being an amplifier of orbital forcing. (a) The vegetation-snow albedo feedback in synergy with the sea-ice albedo feedback tends to amplify Northern Hemisphere and global mean temperature changes. (b) Variations in the extent of the largest desert on Earth, the Sahara, appear to be amplified by biogeophysical feedback. (c) Biogeochemical feedbacks in the climate system in relation to vegetation migration are supposed to be negative on time scales of glacial cycles. However, with respect to changes in global mean temperature, they are presumably weaker than the positive biogeophysical feedbacks.

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27

Mein, P. "Histoire de l'homme et des climats au quaternaire." Geobios 19, no. 4 (1986): 526. http://dx.doi.org/10.1016/s0016-6995(86)80012-2.

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28

Schneider, Werner. "Climate-controlled diagenesis of late Quaternary sediments and soils of the El- Kharga oasis / Upper Egypt." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 198, no. 3 (1995): 389–407. http://dx.doi.org/10.1127/njgpa/198/1995/389.

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29

Prasad, Sushma, and S. K. Gupta. "Role of eustasy, climate and tectonics in late Quaternary evolution of Nal-Cambay region, NW India." Zeitschrift für Geomorphologie 43, no. 4 (1999): 483–504. http://dx.doi.org/10.1127/zfg/43/1999/483.

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30

Adams, Jonathan, Mark Maslin, and Ellen Thomas. "Sudden climate transitions during the Quaternary." Progress in Physical Geography: Earth and Environment 23, no. 1 (1999): 1–36. http://dx.doi.org/10.1177/030913339902300101.

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The time span of the past few million years has been punctuated by many rapid climate transitions, most of them on timescales of centuries to decades. The most detailed information is available for the Younger Dryas-to-Holocene stepwise change around 11 500 years ago, which seems to have occurred over a few decades. The speed of this change is probably representative of similar but less well studied climate transitions during the last few hundred thousand years. These include sudden cold events (Heinrich events/stadials), warm events (interstadials) and the beginning and ending of long warm phases, such as the Eemian interglacial. Detailed analysis of terrestrial and marine records of climate change will, however, be necessary before we can say confidently on what timescale these events occurred; they almost certainly did not take longer than a few centuries. Various mechanisms, involving changes in ocean circulation and biotic productivity, changes in atmospheric concentrations of greenhouse gases and haze particles, and changes in snow and ice cover, have been invoked to explain sudden regional and global transitions. We do not know whether such changes could occur in the near future as a result of human effects on climate. Phenomena such as the Younger Dryas and Heinrich events might only occur in a ‘glacial’ world with much larger ice sheets and more extensive sea-ice cover. A major sudden cold event, however, did probably occur under global climate conditions similar to those of the present, during the Eemian interglacial around 122 000 years ago. Less intensive, but significant rapid climate changes also occurred during the present (Holocene) interglacial, with cold and dry phases occurring on a 1500-year cycle, and with climate transitions on a decade-to-century timescale. In the past few centuries, smaller transitions (such as the ending of the Little Ice Age at about AD 1650) probably occurred over only a few decades at most. All evidence indicates that long-term climate change occurs in sudden jumps rather than incremental changes.

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Adams, J., M. Maslin, and E. Thomas. "Sudden climate transitions during the Quaternary." Progress in Physical Geography 23, no. 1 (1999): 1–36. http://dx.doi.org/10.1191/030913399670425018.

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32

Simpson, G. G. "World climate during the quaternary period." Quarterly Journal of the Royal Meteorological Society 60, no. 257 (2007): 425–78. http://dx.doi.org/10.1002/qj.49706025706.

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33

Ao, Hong, Mark J. Dekkers, Andrew P. Roberts, et al. "Mineral magnetic record of the Miocene-Pliocene climate transition on the Chinese Loess Plateau, North China." Quaternary Research 89, no. 3 (2017): 619–28. http://dx.doi.org/10.1017/qua.2017.77.

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AbstractPre-Quaternary terrestrial climate variability is less well understood than that during the Quaternary. The continuous eolian Red Clay sequence underlying the well-known Quaternary loess-paleosol sequence on the Chinese Loess Plateau (CLP) provides an opportunity to study pre-Quaternary terrestrial climate variability in East Asia. Here, we present new mineral magnetic records for a recently found Red Clay succession from Shilou area on the eastern CLP, and demonstrate a marked East Asian climate shift across the Miocene-Pliocene boundary (MPB). Pedogenic fine-grained magnetite populations, ranging from superparamagnetic (SP)/single domain (SD) up to small pseudo-single domain (PSD) sizes (i.e., from <30 nm up to ~1000 nm), dominate the magnetic properties. Importantly, our mineral magnetic results indicate that both pedogenic formation of SP grains and transformation of SP grains to SD and small PSD grains accelerated across the MPB in the Shilou Red Clay, which are indicative of enhanced pedogenesis. We relate this enhanced pedogenesis to increased soil moisture availability on the CLP, associated with stronger Asian Summer Monsoon precipitation during an overall period of global cooling. Our study thus provides new insights into the Miocene-Pliocene climate transition in East Asia.

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34

Hodell, David A., and James E. T. Channell. "Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate." Climate of the Past 12, no. 9 (2016): 1805–28. http://dx.doi.org/10.5194/cp-12-1805-2016.

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Abstract. We present a 3.2 Myr record of stable isotopes and physical properties at IODP Site U1308 (reoccupation of DSDP Site 609) located within the ice-rafted detritus (IRD) belt of the North Atlantic. We compare the isotope and lithological proxies at Site U1308 with other North Atlantic records (e.g., sites 982, 607/U1313, and U1304) to reconstruct the history of orbital and millennial-scale climate variability during the Quaternary. The Site U1308 record documents a progressive increase in the intensity of Northern Hemisphere glacial–interglacial cycles during the late Pliocene and Quaternary, with mode transitions at ∼ 2.7, 1.5, 0.9, and 0.65 Ma. These transitions mark times of change in the growth and stability of Northern Hemisphere ice sheets. They also coincide with increases in vertical carbon isotope gradients between the intermediate and deep ocean, suggesting changes in deep carbon storage and atmospheric CO2. Orbital and millennial climate variability co-evolved during the Quaternary such that the trend towards larger and thicker ice sheets was accompanied by changes in the style, frequency, and intensity of millennial-scale variability. This co-evolution may be important for explaining the observed patterns of Quaternary climate change.

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Preusser, Frank, and Dirk Radies. "Quaternary climate change in south-eastern Arabia." PAGES news 14, no. 1 (2006): 38–39. http://dx.doi.org/10.22498/pages.14.1.38.

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36

Ogola, Christine A. "Eastern African Quaternary Climate change and variability." Past Global Changes Magazine 22, no. 1 (2014): 53. http://dx.doi.org/10.22498/pages.22.1.53.

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37

Olson, Carolyn. "The Soil Record of Quaternary Climate Change." Quaternary International 162-163 (March 2007): 1–2. http://dx.doi.org/10.1016/j.quaint.2006.11.010.

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38

Weigelt, Patrick, Manuel Jonas Steinbauer, Juliano Sarmento Cabral, and Holger Kreft. "Late Quaternary climate change shapes island biodiversity." Nature 532, no. 7597 (2016): 99–102. http://dx.doi.org/10.1038/nature17443.

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39

Webb III, Thompson, F. Alayne Street-Perrott, and John E. Kutzbach. "Late-Quaternary Paleoclimatic Data and Climate Models." Episodes 10, no. 1 (1987): 4–6. http://dx.doi.org/10.18814/epiiugs/1987/v10i1/003.

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40

Sheldon, Nathan D. "Quaternary Glacial‐Interglacial Climate Cycles in Hawaii." Journal of Geology 114, no. 3 (2006): 367–76. http://dx.doi.org/10.1086/500993.

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41

Darling, W. G. "The isotope hydrology of quaternary climate change☆." Journal of Human Evolution 60, no. 4 (2011): 417–27. http://dx.doi.org/10.1016/j.jhevol.2010.05.006.

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42

Su, Tao, Yu-Sheng (Christopher) Liu, Frédéric M. B. Jacques, Yong-Jiang Huang, Yao-Wu Xing, and Zhe-Kun Zhou. "The intensification of the East Asian winter monsoon contributed to the disappearance of Cedrus (Pinaceae) in southwestern China." Quaternary Research 80, no. 2 (2013): 316–25. http://dx.doi.org/10.1016/j.yqres.2013.07.001.

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Climate change during the Quaternary played an important role in the distribution of extant plants. Herein, cone scales of Cedrus (Pinaceae) were uncovered from the Upper Pliocene Sanying Formation, Longmen Village, Yongping County of Yunnan Province in southwestern China. Detailed comparisons show that these fossils all belong to the genus Cedrus (Pinaceae), and a new species is proposed, Cedrus angusta sp. nov. This find expands the known distribution of Cedrus during the Late Pliocene to Yunnan, where the genus no longer exists in natural forests. Based on the analysis of reconstructed Neogene climate data, we suggest that the intensification of the East Asian winter monsoon during the Quaternary may have dramatically increased seasonality and given rise to a much drier winter in Yunnan. Combined with information on Cedrus fossil records and its seed physiology, we conclude that the intensification of a drier climate after the Late Pliocene may have prevented the survival of Cedrus seedlings, leading to the eventual disappearance of Cedrus in western Yunnan. This study indicates that the topography in southwestern China acted as a vital refuge for many plants during the Quaternary, but that other species gradually disappeared due to the intensification of the monsoonal climate.

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Rother, H., and J. Shulmeister. "Synoptic climate change as a driver of late Quaternary glaciations in the mid-latitudes of the Southern Hemisphere." Climate of the Past 2, no. 1 (2006): 11–19. http://dx.doi.org/10.5194/cp-2-11-2006.

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Abstract. The relative timing of late Quaternary glacial advances in mid-latitude (40-55° S) mountain belts of the Southern Hemisphere (SH) has become a critical focus in the debate on global climate teleconnections. On the basis of glacial data from New Zealand (NZ) and southern South America it has been argued that interhemispheric synchrony or asynchrony of Quaternary glacial events is due to Northern Hemisphere (NH) forcing of SH climate through either the ocean or atmosphere systems. Here we present a glacial snow-mass balance model that demonstrates that large scale glaciation in the temperate and hyperhumid Southern Alps of New Zealand can be generated with moderate cooling. This is because the rapid conversion of precipitation from rainfall to snowfall drives massive ice accumulation at small thermal changes (1-4°C). Our model is consistent with recent paleo-environmental reconstructions showing that glacial advances in New Zealand during the Last Glacial Maximum (LGM) and the Last Glacial Interglacial Transition (LGIT) occurred under very moderate cooling. We suggest that such moderate cooling could be generated by changes in synoptic climatology, specifically through enhanced regional flow of moist westerly air masses. Our results imply that NH climate forcing may not have been the exclusive driver of Quaternary glaciations in New Zealand and that synoptic style climate variations are a better explanation for at least some late Quaternary glacial events, in particular during the LGIT (e.g. Younger Dryas and/or Antarctic Cold Reversal).

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Rother, H., and J. Shulmeister. "Synoptic climate change as a driver of late Quaternary glaciations in the mid-latitudes of the Southern Hemisphere." Climate of the Past Discussions 1, no. 3 (2005): 231–53. http://dx.doi.org/10.5194/cpd-1-231-2005.

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Abstract. The relative timing of late Quaternary glacial advances in mid-latitude (40–55° S) mountain belts of the Southern Hemisphere (SH) has become a critical focus in the debate on global climate teleconnections. On the basis of glacial data from New Zealand and southern South America it has been argued that interhemispheric synchrony or asynchrony of Quaternary glacial events is due to Northern Hemisphere (NH) forcing of SH climate through either the ocean or atmosphere systems. Here we present a glacial snow-mass balance model that demonstrates that large scale glacial advances in the temperate and hyperhumid Southern Alps of New Zealand can be generated with very little thermal forcing. This is because the rapid conversion of precipitation from rainfall to snowfall drives massive ice accumulation at small thermal changes (1–4°C). Our model is consistent with recent paleo-environmental reconstructions showing that glacial advances in New Zealand during the Last Glacial Maximum (LGM) and the Last Glacial Interglacial Transition (LGIT) occurred under very moderate cooling. We suggest that such moderate cooling could be generated by changes in synoptic climatology, specifically through enhanced regional flow of moist westerly air masses. Our results imply that NH climate forcing may not have been the exclusive driver of Quaternary glaciations in New Zealand and that synoptic style climate variations are a better explanation for at least some Late Quaternary glacial events, in particular during the LGIT (e.g. Younger Dryas and/or Antarctic Cold Reversal).

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45

Harris, Stuart A. "Areal Distribution of the Various Combinations of Quaternary Climates." Cahiers de géographie du Québec 11, no. 22 (2005): 55–62. http://dx.doi.org/10.7202/020681ar.

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On reconnaît maintenant que les paléoclimats ont laissé leur trace dans le sol, sur la végétation et les paysages de diverses régions du monde. De nombreuses méthodes d'analyse, discutées et discutables, permettent de découvrir quels étaient les climats du Tertiaire et du Quaternaire, leur forme, leur influence et leur extension et ainsi de connaître l'évolution et les changements des paysages.

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Willeit, M., A. Ganopolski, R. Calov, and V. Brovkin. "Mid-Pleistocene transition in glacial cycles explained by declining CO2and regolith removal." Science Advances 5, no. 4 (2019): eaav7337. http://dx.doi.org/10.1126/sciadv.aav7337.

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Variations in Earth’s orbit pace the glacial-interglacial cycles of the Quaternary, but the mechanisms that transform regional and seasonal variations in solar insolation into glacial-interglacial cycles are still elusive. Here, we present transient simulations of coevolution of climate, ice sheets, and carbon cycle over the past 3 million years. We show that a gradual lowering of atmospheric CO2and regolith removal are essential to reproduce the evolution of climate variability over the Quaternary. The long-term CO2decrease leads to the initiation of Northern Hemisphere glaciation and an increase in the amplitude of glacial-interglacial variations, while the combined effect of CO2decline and regolith removal controls the timing of the transition from a 41,000- to 100,000-year world. Our results suggest that the current CO2concentration is unprecedented over the past 3 million years and that global temperature never exceeded the preindustrial value by more than 2°C during the Quaternary.

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McLean, Bryan S., and Steven D. Emslie. "Stable isotopes reflect the ecological stability of two high-elevation mammals from the late Quaternary of Colorado." Quaternary Research 77, no. 3 (2012): 408–17. http://dx.doi.org/10.1016/j.yqres.2012.02.001.

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The vertebrate fossil record of Cement Creek Cave, Colorado, spans from ≫ 45,000 yr ago to the present and represents the richest stratified series of high-elevation (≫ 2900 m) mammal remains known from the late Quaternary of North America. Stable carbon and oxygen isotope analyses of tooth enamel were used to assess potential ecological responses of two species found commonly throughout the cave, Yellow-bellied marmots (Marmota flaviventris) and Bushy-tailed woodrats (Neotoma cinerea), to late Quaternary climate and environmental changes of the Southern Rocky Mountains. Results indicate that despite such perturbations, the dietary ecologies of both species were maintained across this period. Neither taxon shifted to consuming C4 taxa or different C3 functional groups; similarly, no significant shifts in surface water use were detected. Variations in enamel δ13C were observed, however, that represent the physiological responses of high-elevation plants to changing levels of late Quaternary atmospheric CO2. While our findings extend both the geographic and elevational record of this plant CO2 response, they simultaneously highlight the ecological stability of high-elevation M. flaviventris and N. cinerea during climate changes of late Quaternary magnitude.

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Graham, Russell W. "Quaternary Mammal Communities: Relevance of the Individualistic Response and Non-Analogue Faunas." Paleontological Society Papers 11 (October 2005): 141–58. http://dx.doi.org/10.1017/s1089332600001297.

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Frequent and repeated climate fluctuations of the late Quaternary serve as a “natural experiment” for the response of species to environmental change. Analysis of the FAUNMAP database documents individualistic shifts in the geographic distributions for late Quaternary mammals. However, because the individualistic response is not necessarily random and because many species share similar niche parameters, it is possible that some species appear to form coherent groups of core species. In reality their dispersals are individualistic with regard to rate and timing. The individualistic response of mammals, as well as that of other organisms, has created late Quaternary communities without modern analogues. This concept has profound implications for the design of biological reserves and for land use management with respect to future global climate change. However, the relevance of non-analogue mammal communities has been challenged by Alroy (1999), who claims that non-analogue associations were not common in the Quaternary and that they appeared to occur in both the Pleistocene and Holocene. Reexamination of his analysis shows that he employed a different definition for non-analogue faunas and that his methods of analyses created artificially low counts of non-analogue communities and consequently an underestimate of their importance.

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Han, Yongming, Zhisheng An, Jennifer R. Marlon, et al. "Asian inland wildfires driven by glacial–interglacial climate change." Proceedings of the National Academy of Sciences 117, no. 10 (2020): 5184–89. http://dx.doi.org/10.1073/pnas.1822035117.

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Wildfire can influence climate directly and indirectly, but little is known about the relationships between wildfire and climate during the Quaternary, especially how wildfire patterns varied over glacial–interglacial cycles. Here, we present a high-resolution soot record from the Chinese Loess Plateau; this is a record of large-scale, high-intensity fires over the past 2.6 My. We observed a unique and distinct glacial–interglacial cyclicity of soot over the entire Quaternary Period synchronous with marine δ18O and dust records, which suggests that ice-volume-modulated aridity controlled wildfire occurrences, soot production, and dust fluxes in central Asia. The high-intensity fires were also found to be anticorrelated with global atmospheric CO2 records over the past eight glacial–interglacial cycles, implying a possible connection between the fires, dust, and climate mediated through the iron cycle. The significance of this hypothetical connection remains to be determined, but the relationships revealed in this study hint at the potential importance of wildfire for the global climate system.

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Roberts, Neil, and Alastair G. Dawson. "Ice Age Earth: Late Quaternary Geology and Climate." Geographical Journal 160, no. 2 (1994): 212. http://dx.doi.org/10.2307/3060102.

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Journal articles on the topic 'Climat quaternaire'

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