The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (R...

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Main Authors:	Bertler, N., Conway, H., Dahl-Jensen, D., Emanuelsson, D., Winstrup, M., Vallelonga, P., Lee, J., Brook, E., Severinghaus, J., Fudge, T., Keller, E., Troy Baisden, W., Hindmarsh, R., Neff, P., Blunier, T., Edwards, Peter, Mayewski, P., Kipfstuhl, S., Buizert, C., Canessa, S., Dadic, R., Kjær, H., Kurbatov, A., Zhang, D., Waddington, E., Baccolo, G., Beers, T., Brightley, H., Carter, L., Clemens-Sewall, D., Ciobanu, V., Delmonte, B., Eling, L., Ellis, A., Ganesh, S., Golledge, N., Haines, S., Handley, M., Hawley, R., Hogan, C., Johnson, K., Korotkikh, E., Lowry, D., Mandeno, D., McKay, R., Menking, J., Naish, T., Noerling, C., Ollive, A., Orsi, A., Proemse, B., Pyne, A., Pyne, R., Renwick, J., Scherer, R., Semper, S., Simonsen, M., Sneed, S., Steig, E., Tuohy, A., Ulayottil Venugopal, A., Valero-Delgado, F., Venkatesh, J., Wang, F., Wang, S., Winski, D., Holly, W., Whiteford, A., Xiao, C., Yang, J., Zhang, X.
Format:	Journal Article
Published:	Copernicus GmbH 2018
Online Access:	http://hdl.handle.net/20.500.11937/67681

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author	Bertler, N. Conway, H. Dahl-Jensen, D. Emanuelsson, D. Winstrup, M. Vallelonga, P. Lee, J. Brook, E. Severinghaus, J. Fudge, T. Keller, E. Troy Baisden, W. Hindmarsh, R. Neff, P. Blunier, T. Edwards, Peter Mayewski, P. Kipfstuhl, S. Buizert, C. Canessa, S. Dadic, R. Kjær, H. Kurbatov, A. Zhang, D. Waddington, E. Baccolo, G. Beers, T. Brightley, H. Carter, L. Clemens-Sewall, D. Ciobanu, V. Delmonte, B. Eling, L. Ellis, A. Ganesh, S. Golledge, N. Haines, S. Handley, M. Hawley, R. Hogan, C. Johnson, K. Korotkikh, E. Lowry, D. Mandeno, D. McKay, R. Menking, J. Naish, T. Noerling, C. Ollive, A. Orsi, A. Proemse, B. Pyne, A. Pyne, R. Renwick, J. Scherer, R. Semper, S. Simonsen, M. Sneed, S. Steig, E. Tuohy, A. Ulayottil Venugopal, A. Valero-Delgado, F. Venkatesh, J. Wang, F. Wang, S. Winski, D. Holly, W. Whiteford, A. Xiao, C. Yang, J. Zhang, X.
author_facet	Bertler, N. Conway, H. Dahl-Jensen, D. Emanuelsson, D. Winstrup, M. Vallelonga, P. Lee, J. Brook, E. Severinghaus, J. Fudge, T. Keller, E. Troy Baisden, W. Hindmarsh, R. Neff, P. Blunier, T. Edwards, Peter Mayewski, P. Kipfstuhl, S. Buizert, C. Canessa, S. Dadic, R. Kjær, H. Kurbatov, A. Zhang, D. Waddington, E. Baccolo, G. Beers, T. Brightley, H. Carter, L. Clemens-Sewall, D. Ciobanu, V. Delmonte, B. Eling, L. Ellis, A. Ganesh, S. Golledge, N. Haines, S. Handley, M. Hawley, R. Hogan, C. Johnson, K. Korotkikh, E. Lowry, D. Mandeno, D. McKay, R. Menking, J. Naish, T. Noerling, C. Ollive, A. Orsi, A. Proemse, B. Pyne, A. Pyne, R. Renwick, J. Scherer, R. Semper, S. Simonsen, M. Sneed, S. Steig, E. Tuohy, A. Ulayottil Venugopal, A. Valero-Delgado, F. Venkatesh, J. Wang, F. Wang, S. Winski, D. Holly, W. Whiteford, A. Xiao, C. Yang, J. Zhang, X.
author_sort	Bertler, N.
building	Curtin Institutional Repository
collection	Online Access
description	High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979-2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE.
first_indexed	2025-11-14T10:34:43Z
format	Journal Article
id	curtin-20.500.11937-67681
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T10:34:43Z
publishDate	2018
publisher	Copernicus GmbH
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-676812018-07-17T02:01:34Z The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years Bertler, N. Conway, H. Dahl-Jensen, D. Emanuelsson, D. Winstrup, M. Vallelonga, P. Lee, J. Brook, E. Severinghaus, J. Fudge, T. Keller, E. Troy Baisden, W. Hindmarsh, R. Neff, P. Blunier, T. Edwards, Peter Mayewski, P. Kipfstuhl, S. Buizert, C. Canessa, S. Dadic, R. Kjær, H. Kurbatov, A. Zhang, D. Waddington, E. Baccolo, G. Beers, T. Brightley, H. Carter, L. Clemens-Sewall, D. Ciobanu, V. Delmonte, B. Eling, L. Ellis, A. Ganesh, S. Golledge, N. Haines, S. Handley, M. Hawley, R. Hogan, C. Johnson, K. Korotkikh, E. Lowry, D. Mandeno, D. McKay, R. Menking, J. Naish, T. Noerling, C. Ollive, A. Orsi, A. Proemse, B. Pyne, A. Pyne, R. Renwick, J. Scherer, R. Semper, S. Simonsen, M. Sneed, S. Steig, E. Tuohy, A. Ulayottil Venugopal, A. Valero-Delgado, F. Venkatesh, J. Wang, F. Wang, S. Winski, D. Holly, W. Whiteford, A. Xiao, C. Yang, J. Zhang, X. High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the eastern Ross Sea, named the Roosevelt Island Climate Evolution (RICE) ice core. Comparison of this record with climate reanalysis data for the 1979-2012 interval shows that RICE reliably captures temperature and snow precipitation variability in the region. Trends over the past 2700 years in RICE are shown to be distinct from those in West Antarctica and the western Ross Sea captured by other ice cores. For most of this interval, the eastern Ross Sea was warming (or showing isotopic enrichment for other reasons), with increased snow accumulation and perhaps decreased sea ice concentration. However, West Antarctica cooled and the western Ross Sea showed no significant isotope temperature trend. This pattern here is referred to as the Ross Sea Dipole. Notably, during the Little Ice Age, West Antarctica and the western Ross Sea experienced colder than average temperatures, while the eastern Ross Sea underwent a period of warming or increased isotopic enrichment. From the 17th century onwards, this dipole relationship changed. All three regions show current warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea but increasing in the western Ross Sea. We interpret this pattern as reflecting an increase in sea ice in the eastern Ross Sea with perhaps the establishment of a modern Roosevelt Island polynya as a local moisture source for RICE. 2018 Journal Article http://hdl.handle.net/20.500.11937/67681 10.5194/cp-14-193-2018 http://creativecommons.org/licenses/by/4.0/ Copernicus GmbH fulltext
spellingShingle	Bertler, N. Conway, H. Dahl-Jensen, D. Emanuelsson, D. Winstrup, M. Vallelonga, P. Lee, J. Brook, E. Severinghaus, J. Fudge, T. Keller, E. Troy Baisden, W. Hindmarsh, R. Neff, P. Blunier, T. Edwards, Peter Mayewski, P. Kipfstuhl, S. Buizert, C. Canessa, S. Dadic, R. Kjær, H. Kurbatov, A. Zhang, D. Waddington, E. Baccolo, G. Beers, T. Brightley, H. Carter, L. Clemens-Sewall, D. Ciobanu, V. Delmonte, B. Eling, L. Ellis, A. Ganesh, S. Golledge, N. Haines, S. Handley, M. Hawley, R. Hogan, C. Johnson, K. Korotkikh, E. Lowry, D. Mandeno, D. McKay, R. Menking, J. Naish, T. Noerling, C. Ollive, A. Orsi, A. Proemse, B. Pyne, A. Pyne, R. Renwick, J. Scherer, R. Semper, S. Simonsen, M. Sneed, S. Steig, E. Tuohy, A. Ulayottil Venugopal, A. Valero-Delgado, F. Venkatesh, J. Wang, F. Wang, S. Winski, D. Holly, W. Whiteford, A. Xiao, C. Yang, J. Zhang, X. The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
title	The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
title_full	The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
title_fullStr	The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
title_full_unstemmed	The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
title_short	The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
title_sort	ross sea dipole-temperature, snow accumulation and sea ice variability in the ross sea region, antarctica, over the past 2700 years
url	http://hdl.handle.net/20.500.11937/67681

The Ross Sea Dipole-temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years

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