Current Science

Open Access Open Access  Restricted Access Subscription Access

The Coupling of Orbulina universa< Diameter with the Warming and Cooling Events in the Arabian Sea Over the Past 40,000 Years


Affiliations
1 Paleo-Environment Research Group, Department of Applied Geology, School of Earth and Atmospheric Sciences, University of Madras, Chennai 600 025, India
2 Institute for Ocean Management, Anna University, Chennai 600 025, India
3 Department of Geology, University of Madras, Chennai 600 025, India
4 Petroleum Engineering Department, Chandigarh University, Mohali 140 413, India
 

A 40 ky record of variations in the average diameter of Orbulina universa from a 5.4 m core (SK-322) in the Arabian Sea, off Goa, India has been analysed in this study. The chronology of the upper 1.00 m of the core was documented by AMS radiocarbon dates. Fifty specimens of O. universa were hand-picked from each of the 50 subsamples. In all, 2500 specimens were measured for their diameter. Downcore variations in the average diameter of O. universa were in excellent agreement with the curve representing the Iberian Margin temperature index, with the peak representing the Bølling–Allerød transition and the troughs reflecting Heinrich Event I and Younger Dryas. The lower part of the core examined in this study (between 58 and 100 cm), which is the equivalent of 30,000–40,000 years BP, is marked by closely spaced peaks and troughs that are interpreted as representing the Dansgaard– Oeschger cycles that were dominant in the Northern Hemisphere between 60,000 and 30,000 years BP.

Keywords

Average Diameter, Orbulina universa, Palaeoclimate, Planktic Foraminifera.
User
Notifications
Font Size

  • d’Orbigny, A., Foraminiferes. In Ramon de la Sagra. Hist. Phys. Pol. Natl. Cuba, 1839, 7, 119–146.

  • Haynes, J. R., Cardigan Bay recent foraminifera. Bull. British Mus. Natl. Hist., Zool., 1973, 245.

  • Bé, A. W. H., Harrison, S. M. and Lott, L., Orbulina universa, d’Orbigny in the Indian Ocean. Micropaleontology, 1973, 19, 150–192.

  • Bé, A. W. H. and Tolderlund, D. S., Distribution and ecology of living planktonic foraminifera in surface water of the Atlantic and Indian Oceans. In Micropaleontology of Oceans (eds Funnel, B. M. and Riedel, W. R.), Cambridge University Press, London, UK, 1971, pp. 105–149.

  • Fairbanks, R. G. and Wiebe, P. H., Foraminifera and chlorophyll maximum: vertical distribution, seasonal succession and paleoceanographic significance. Science, 1980, 209, 1524–1526.

  • Tolderlund, D. S. and Bé, A. W. H., Seasonal distribution of planktonic foraminifera in the western North Atlantic. Micropaleontology, 1971, 17, 297–329.

  • Hecht, A. D., Bé, A. W. H. and Lott, L., Ecologic and paleoclimatic implications of morphologic variation of Orbulina universa in the Indian Ocean. Science, 1976, 194, 422–424.

  • Nigam, R., Paleoclimatic implication of size variation in Orbulina universa in a core from the north Indian Ocean. Curr. Sci., 1990, 59, 46–47.

  • Malmgren, B. and Williams, N. H., Variation in test diameter of Orbulina universa in the paleoclimatology of the Late Quaternary of the Gulf of Mexico. Palaeogeogr. Palaeoclimatol. Palaeoecol., 1978, 25, 235–240.

  • Bé, A. W. H. and Duplessy, J.-C., Subtropical convergence fluctuations and quaternary climates in the middle latitudes of the Indian Ocean. Science, 1976, 194, 419–422.

  • Haenel, P., Paleoceanographic value of Orbulina universa d’orbigny (foraminifera). Oceanol. Acta, 1987, 10, 15–25.

  • Divakar Naidu, P. and Malmgren, B. A., Monsoon upwelling effects on test size of some planktonic foraminiferal species from the Oman Margin, Arabian Sea. Paleoceanogr. Paleoclimatol., 1995, 10, 117–122.

  • Neelavannan, K., Geochemical and environmental magnetic studies on Late Quaternary sediments from southeastern Arabian Sea and the paleoclimate implications. Ph D thesis, University of Madras, Chennai, 2018, p. 68.

  • Kessarkar, P., Purnachandra Rao, V., Naqvi, S., Chivas, A. R. and Saino, T., Fluctuations in productivity and denitrification in the southeastern Arabian Sea during the Late Quaternary. Curr. Sci., 2010, 99, 485–491.

  • Timmermann, A. and Menviel, L., What drives climate flip-flops? Science, 2009, 325, 273–274.

  • Tiwari, M., Ramesh, R., Somayajulu, B. L. K., Jull, A. J. T. and Burr, G. S., Early deglacial (~19–17 ka) strengthening of the northeast monsoon. Geophys. Res. Lett., 2005, 32, 1–4.

  • Bond, G., Broecker, W., Johnsen, S., McManus, J., Labeyrie, L., Jouzel, J. and Bonani, G., Correlations between climate records from North Atlantic sediments and Greenland ice. Nature, 1993, 365, 143–147.

  • Dansgaard, W. et al., Evidence for general instability of past climate from a 250-kyr ice-core record. Nature, 1993, 364, 218– 220.

  • Schulz, H., Emeis, K. C., Erlenkeuser, H., von Rad, U. and Rolf, C., The Toba volcanic event and interstadial/stadiaI climates at the marine isotopic stage 5 to 4 transition in the northern Indian Ocean. Quaternary Res., 2002, 5, 22–31.

  • Heinrich, H., Origin and consequences of cyclic ice rafting in the Northeast Atlantic Ocean during the past 130,000 years. Quaternary Res., 1988, 29, 142–152.

  • Hemming, S. R., Heinrich events: massive Late Pleistocene detritus layers of the North Atlantic and their global climate imprint. Rev. Geophys., 2004, 42, RG1005; doi:10.1029/2003RG000128.

  • Wang, Y. J. et al., Millennial- and orbital-scale changes in the East Asian monsoon over the past 224,000 years. Nature, 2008, 457, 1090–1093.

  • Banakar, V. K., Mahesh, B. S., Burr, G. and Chodankar, A. R., Climatology of the Eastern Arabian Sea during the last glacial cycle reconstructed from paired measurement of foraminiferal δ18O and Mg/Ca. Quaternary Res., 2010, 73, 535–540.

  • Johnsen, S. J. et al., Irregular glacial interstadials recorded in a new Greenland ice core. Nature, 1992, 359, 311–313.

  • Sirocko, F., Garbe-Schönberg, C.-D., McIntyre, A. and Molfino, B., Teleconnections between the subtropical monsoons and highlatitude climates during the last deglaciation. Nature, 1996, 272, 526–529.

  • Leuschner, D. C. and Sirocko, F., The low-latitude monsoon climate during Dansgaard–Oeschger cycles and Heinrich events. Quaternary Sci. Rev., 2000, 19, 243–254.

  • Anand, P., Kroon, D., Singh, A. D., Ganeshram, R. S., Ganssen, G. and Elderfield, H., Coupled sea surface temperature–seawater δ18O reconstructions in the Arabian Sea at the millennial scale for the last 35 ka. Paleoceanography, 2007, 23, PA4207; doi:10.1029/ 2007PA001564.


Abstract Views: 321

PDF Views: 114




  • The Coupling of Orbulina universa< Diameter with the Warming and Cooling Events in the Arabian Sea Over the Past 40,000 Years

Abstract Views: 321  |  PDF Views: 114

Authors

P. M. Nimmy
Paleo-Environment Research Group, Department of Applied Geology, School of Earth and Atmospheric Sciences, University of Madras, Chennai 600 025, India
N. Rajeshwara Rao
Paleo-Environment Research Group, Department of Applied Geology, School of Earth and Atmospheric Sciences, University of Madras, Chennai 600 025, India
K. Neelavannan
Institute for Ocean Management, Anna University, Chennai 600 025, India
S. M. Hussain
Department of Geology, University of Madras, Chennai 600 025, India
S. R. Mahapatra
Petroleum Engineering Department, Chandigarh University, Mohali 140 413, India

Abstract


A 40 ky record of variations in the average diameter of Orbulina universa from a 5.4 m core (SK-322) in the Arabian Sea, off Goa, India has been analysed in this study. The chronology of the upper 1.00 m of the core was documented by AMS radiocarbon dates. Fifty specimens of O. universa were hand-picked from each of the 50 subsamples. In all, 2500 specimens were measured for their diameter. Downcore variations in the average diameter of O. universa were in excellent agreement with the curve representing the Iberian Margin temperature index, with the peak representing the Bølling–Allerød transition and the troughs reflecting Heinrich Event I and Younger Dryas. The lower part of the core examined in this study (between 58 and 100 cm), which is the equivalent of 30,000–40,000 years BP, is marked by closely spaced peaks and troughs that are interpreted as representing the Dansgaard– Oeschger cycles that were dominant in the Northern Hemisphere between 60,000 and 30,000 years BP.

Keywords


Average Diameter, Orbulina universa, Palaeoclimate, Planktic Foraminifera.

References





DOI: https://doi.org/10.18520/cs%2Fv120%2Fi4%2F694-698