No 16 (2017): Ukrainian Antarctic Journal
Articles

LATE QUATERNARY CLIMATE VARIATIONS IN WEST ANTARCTICA AND THEIR IMPACT ON THE MARINE SILICEOUS MICROALGAE

А. P. Olshtynska
Institute of Geological Sciences, National Academy of Sciences of Ukraine, 55-b O. Honchar Str., Kyiv, 01054, Ukraine
O. S. Ogienko
Institute of Geology, Taras Shevchenko National University of Kyiv, 90 Vasylkivska Str., Kyiv, 03022, Ukraine
Published June 5, 2018
Keywords
  • paleoclimate,
  • South ocean,
  • diatoms,
  • Antarctic Peninsula

Abstract

Main objective is the reconstruction of late Quaternary climatic events in the northern and north-western parts of the Antarctic Peninsula shelf based on species variation, abundance and ecological structure of diatom complex in bottom sediments. Methods: siliceous microalgae were used as biomarkers of geologycal, paleogeographycal and facial events. Results: the reasons for changing of the diatom composition in bottom sediments were determined; paleogeographic reconstraction and chronology of the Late Quarter paleoclimatic trends in the region were investigated. Conclusions of the main paleoclimatic events of the Late Quarter within the northwestern shelf and in the southern part of the Skotia Sea are made. Two climatic phases are identified: «Little Ice Age» (900-500 years ago) with moderate icy conditions and the next phase of rapid modern warming.

References

  1. Armand, L. K., Crosta, X., Romero, O., Pichon, J.-J. 2005. The biogeography of major diatom taxa in Southern Ocean sediments: 1. Sea ice related species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223, 93-126. https://doi.org/10.1016/j.palaeo.2005.02.015.
  2. Bak, Y.-S., Yoo, K.-C., Yoon, H., Yun, H. 2007. Diatom evidence for Holocene paleoclimatic change in the South Scotia Sea, West Antarctica. Geosciences Journal, 11, 11-22. https://doi.org/10.1007/BF02910377.
  3. Bockheim J., Vieira G., Ramos M., López-Martínez J., Serrano E., Guglielmin M., Wilhelm K., Nieuwendam A. 2013. Climate warming and permafrost dynamics in the Antarctic Peninsula region. Global and Planetary Change, 100, 215-223. https://doi.org/10.1016/j.gloplacha.2012.10.018.
  4. Bockheim, J. et al. 2013. Climate warming and permafrost dynamics in the Antarctic Peninsula region. Global and Planetary Change, 100, 215-223. https://doi.org/10.1016/j.gloplacha.2012.10.018.
  5. Crosta, X., Romero, O., Armand, L.K., Pichon, J.-J. 2005. The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species. Palaeogeography, Palaeoclimatology, Palaeoecology, 223, 66-92. https://doi.org/10.1016/j.palaeo.2005.03.028.
  6. Etourneau, J., Collins, L. G., Willmott, V., Kim, J.-H., Barbara, L., Leventer, A., Schouten, S., Sinninghe Damsté, J. S., Bianchini, A., Klein, V., Crosta, X., Massé, G. 2013. Holocene climate variations in the western Antarctic Peninsula: evidence for sea ice extent predominantly controlled by changes in insolation and ENSO variability. Climate of the Past, 9, 1431-1446. https://doi.org/10.5194/cp-9-1431-2013.
  7. Lee, J., Yoon, H., Yoo, K.-C., Lim, H. S., Lee, Y., Kim, D., Bak, Y.-S., Itaki, T. 2012. Late Quaternary glacial-interglacial variations in sediment supply in the southern Drake Passage. Quaternary Research, 78, 119-129. https://doi.org/10.1016/j.yqres.2012.03.010.
  8. Lisitsyn, A. P. 1994. Ledovaya sedimentatsiya v Mirovom okeane [Sea-ice sedimentation in the World Ocean]. Moscow: Nauka.
  9. Mulvaney R., Abram N. J., Hindmarsh R. C. A., Arrowsmith C., Fleet L., Triest J., Sime L. C., Alemany O., Foord S. 2012. Recent Antarctic Peninsula warming relative to Holocene climate and ice-shelf history. Nature, 489, 141-144. https://doi.org/10.1038/nature11391
  10. Nielsen, S., Koc, N, Crosta, X. 2004. Holocene climate in the Atlantic sector of the Southern Ocean: Controlled by insolation or oceanic circulation. Geological Society of America, 32(4), P. 317-320. https://doi.org/10.1130/G20334.1.
  11. Ogienko, O., Tymchenko, Yu. 2015. The Late Holocene climate change effect on sedimentation environments near the Antarctic Peninsula. Visnyk Kyivskoho Universytety. Geologiya [Visnyk of Taras Shevchenko National University of Kyiv: Geology], 2(69),11-16. https://doi.org/10.17721/1728-2713.69.02.11-16.
  12. Ogienko, O. S. 2015. Biofacial characteristic as inferred from diatomic water plants of botton deposits of the Antarctic Peninsula shelf. Heolohiia i Poleznye Iskopaemye Mirovoho Okeana [Geology and Mineral Resources of the World Ocean], 3(41), 82-90.
  13. Samyshev, E. Z. 2009. The Features of Structure and Functioning of the Ecosystem in Region of the Ukrainian Antarctic Station (UAS) Academician Vernadsky. Ukrainskij Antarktychnij Zhurnal [Ukrainian Antarctic Journal], 8, 237-266.
  14. Stenni, B., Curran, M. A. J., Abram N. J., Orsi, A., Goursaud, S., Masson-Delmotte, V., Neukom, R., Goosse, H., Divine, D., Ommen, T., Steig, E. J., Dixon, D. A., Thomas, E. R., Bertler, N. A.N., Isaksson, E., Ekaykin, A., Werner, M., Frezzotti, M. 2017. Antarctic climate variability on regional and continental scales over the last 2000 years. Climate of the Past, 13, 1609-1634. https://doi.org/10.5194/cp-13-1609-2017.