.png)
.png)
.png)
Email this article 
Postglacial relative sea level change at Fildes Peninsula, King George Island (West Antarctic)
https://doi.org/10.15356/2076-6734-2016-1-93-102
Abstract
Analysis and integration of data obtained in our field and laboratory investigations of 2008–2012 together with results of previous paleogeographic studies were conducted to reveal parameters and factors of the post-glacial changes in the relative sea-level on the Fildes Peninsula and the King George Island. Results of dating of organic material taken from cross-sections of Quaternary deposits, data on morphology of marine landforms as well as on bottom sediments in lakes were used to construct a curve of changes in the relative sea-level.
Our research has shown that the rapid rise of relative sea level in the area (since the beginning of the Holocene) decelerated about 8000 years BP, achieving its maximum about 7000 years BP. This was followed by the fall of relative sea-level (the land elevation) by 18–20 m in total, and it was characterized by relatively high rate of fall during periods of 6000– 5000 years BP, 4000–2500 years BP, and during the last 1500 years; the rate decreased in 5000–4000 years BP and 2500– 1600 years BP. The changes in relative sea level in this region were determined by the following factors: the eustatic component of the global changes in sea-level and, possibly, oscillations in the global sea level of another nature; local parameters of the Last glacial maximum; a course of the Peninsula deglaciation; regional physical characteristics of the Earth's crust and the mantle substances; local tectonic processes, including the isostatic rebound. Since the beginning of the Holocene up to about 7000 years BP, the main contribution to changes of the relative sea-level in this area was made by the global eustatic factor. The subsequent fall of the relative sea-level (elevation of the Peninsula surface) proceeded under condition of reduced role of the eustatic factor and predominance of other factors.
About the Authors
K. V. PolishchukRussian Federation
St. Petersburg
S. R. Verkulich
Russian Federation
St. Petersburg
I. S. Ezhikov
Russian Federation
St. Petersburg
Z. V. Pushina
Russian Federation
St. Petersburg
References
1. Anisimov M.A., Pushina Z.V., Ivanova V.V., Pavlova E.Yu., Pitulko V.V. Istoriya izmeneniy urovnya morya v raione Novosibirskikh ostrovov v golotsene. The history of sea level changes in the area of the New Siberian Islands in the Holocene. Paleontologiya, stratigrafiya, paleogeografiya mezozoya, kainozoya borealnykh rayonov. Materialy nauchnoy sessii. Paleontology, stratigraphy and paleogeography of the Mesozoic and Cenozoic era of boreal regions. Materials of science session. V. 2. Novosibirsk: INGG SB RAN, 2011: 10–14. [In Russian].
2. Verkulich S.R. Posledniy lednikovyi maksimum i deglyatsiatsiya v kraevoy zone Antarktidy. The last glacial maximum and the deglaciation in the Antarctic marginal zone. PhD Thesis. Moscow, Institute of Geography, RAS, 2011: 46 p. [In Russian].
3. Verkulich S.R., Pushina Z.V., Sokratova I.N., Melles M., Diekmann B. Holocene sea-level changes and the glacio-isostasy in the Antarctic margin. Materialy glyatsiologicheskikh issledovaniy. Data of Glaciological Studies. 2007, 102: 161–167. [In Russian].
4. Verkulich S.R., Pushina Z.V., Tatur A., Dorozhkina M.V., Sukhomlinov D.I., Kurbatova L.E., Mavludov B.R., Savatugin L.M. Holocene environmental changes on Fildes Peninsula, King George Island (West Antarctica). Problemy Arktiki i Antarktiki. Problems of Arctic and Antarctic. 2012, 3 (93):17–27. [In Russian].
5. Makarov A.S., Bolshiyanov D.Yu. The Holocene fluctuations of the Arctic seas of Russia. Materialy Vserossiyskoy nauchnoy konferentsii “Problemy paleogeografii i stratigrafii pleistotsena. Proc. of the Scientific Conference "Problems of paleogeography and stratigraphy of the Pleistocene." Moscow: Moscow State University, 2011: 315–320. [In Russian].
6. Poleshchuk K.V., Verkulich S.R. Holocene sea-level changes in Bunger Oasis (East Antarctica). Problemy Arktiki i Antarktiki. Problems of Arctic and Antarctic. 2014, 2 (100): 15–24. [In Russian].
7. Ahn I.Y. Ecology of the Antarctic bivalve Laternula elliptica (King and Broderip) in Collins Harbor, King George Island: benthic environment and an adaptive strategy. Berkman P.A., Yoshida Y. (eds.) Holocene environmental changes in Antarctic coastal areas (Memoirs of National Institute of Polar Research, Special issue, 50). Tokyo: NIPR, 1994: 1–10.
8. Bentley M.J. Volume of Antarctic ice at the Last Glacial Maximum, and its impact on global sea level change. Quaternary Science Reviews. 1999, 18: 1569–1595.
9. Björck S., Håkansson H., Zale R., Karlen W., Jonsson B.L. A late Holocene lake sediment sequence from Livingston Island, South Shetland Islands, with paleoclimatic implications. Antarctic Science. 1991, 3 (1): 61–72.
10. Gordon J.E., Harkness D.D. Magnitude and geographic variation of the radiocarbon content in Antarctic marine life: implications for reservoir corrections in radiocarbon dating. Quaternary Science Reviews. 1992, 11: 697–708.
11. Lambeck K., Rouby H., Purcell A., Sunc Y. Sea level and global ice volumes from the Last Glacial Maximum to the Holocene. Proceedings of the National Academy of Sciences (PNAS). 2014, 111: 15296–15303.
12. Mäusbacher R., Müller J., Schmidt R. Evolution of postglacial sedimentation in Antarctic lakes (King George Island). Zeitschrift für Geomorphologie. Neue Folge. 1989, 33 (2): 219–234.
13. Milliken K.T., Anderson J.B., Wellner J.S., Bohaty S.M., Manley P.L. High resolution climate record from Maxwell Bay, South Shetland Islands, Antarctica. Geological Society of America Bulletin. 2009, 121: 1711–1725.
14. Okuno J., Miura H. Last deglacial relative sea level variations in Antarctica derived from glacial isostatic adjustment modeling. Geoscience Frontiers. 2013, 4: 623–632.
15. Omoto K. The problem and significance of radiocarbon geochronology in Antarctica. Oliver R.L., James P.R., Jago J.B. (eds.) Antarctic Earth Science. Canberra: Australian Academy of Science. 1983: 450–452.
16. Peltier W.R. Global glacial isostasy and the surface of the ice-age Earth: the ICE-5G (VM2) model and grace. Annual Review of Earth Planetary Science. 2004, 32: 111–49.
17. Peltier W.R., Fairbanks R.G. Global glacial ice volume and Last Glacial Maximum duration from an extended Barbados sea level record. Quaternary Science Reviews. 2006, 25: 3322–3337.
18. Spada G., Stocchi P. SELEN: a Fortran 90 program for solving the "Sea Level Equation". Computers and Geosciences. 2007, 33 (4): 538–562.
19. Watcham E.P., Bentley M.J., Hodgson D., Roberts S.J., Fretwell P.T., Lloyd J.M., Larter R.D., Whitehouse P.L., Leng M.J., Monien P., Moreton S.G. A new Holocene relative sea level curve for the South Shetland Island, Antarctica. Quaternary Science Reviews. 2011, 30: 3152–3170.
Supplementary files
For citation: Polishchuk K.V., Verkulich S.R., Ezhikov I.S., Pushina Z.V. Postglacial relative sea level change at Fildes Peninsula, King George Island (West Antarctic). Ice and Snow. 2016;56(1):93-102. https://doi.org/10.15356/2076-6734-2016-1-93-102
Refbacks
- There are currently no refbacks.
ISSN 2076-6734 (Print)
ISSN 2412-3765 (Online)