The Ross Sea Dipole – temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years
-
Published:2018-02-21
Issue:2
Volume:14
Page:193-214
-
ISSN:1814-9332
-
Container-title:Climate of the Past
-
language:en
-
Short-container-title:Clim. Past
Author:
Bertler Nancy A. N.ORCID, Conway HowardORCID, Dahl-Jensen Dorthe, Emanuelsson Daniel B.ORCID, Winstrup MaiORCID, Vallelonga Paul T.ORCID, Lee James E.ORCID, Brook Ed J., Severinghaus Jeffrey P.ORCID, Fudge Taylor J., Keller Elizabeth D., Baisden W. TroyORCID, Hindmarsh Richard C. A.ORCID, Neff Peter D., Blunier ThomasORCID, Edwards RossORCID, Mayewski Paul A., Kipfstuhl Sepp, Buizert ChristoORCID, Canessa Silvia, Dadic Ruzica, Kjær Helle A.ORCID, Kurbatov AndreiORCID, Zhang Dongqi, Waddington Edwin D., Baccolo GiovanniORCID, Beers Thomas, Brightley Hannah J., Carter Lionel, Clemens-Sewall David, Ciobanu Viorela G., Delmonte Barbara, Eling Lukas, Ellis AjaORCID, Ganesh Shruthi, Golledge Nicholas R.ORCID, Haines Skylar, Handley Michael, Hawley Robert L., Hogan Chad M.ORCID, Johnson Katelyn M.ORCID, Korotkikh Elena, Lowry Daniel P.ORCID, Mandeno Darcy, McKay Robert M.ORCID, Menking James A., Naish Timothy R., Noerling Caroline, Ollive Agathe, Orsi AnaïsORCID, Proemse Bernadette C., Pyne Alexander R., Pyne Rebecca L., Renwick JamesORCID, Scherer Reed P., Semper Stefanie, Simonsen Marius, Sneed Sharon B., Steig Eric J.ORCID, Tuohy Andrea, Venugopal Abhijith Ulayottil, Valero-Delgado Fernando, Venkatesh Janani, Wang FeitangORCID, Wang Shimeng, Winski Dominic A., Winton V. Holly L.ORCID, Whiteford Arran, Xiao Cunde, Yang Jiao, Zhang Xin
Abstract
Abstract. 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.
Funder
British Antarctic Survey Antarctica New Zealand
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Global and Planetary Change
Reference134 articles.
1. Abraham, J. P., Baringer, M., Bindoff, N. L., Boyer, T., Cheng, L. J.,
Church, J. A., Conroy, J. L., Domingues, C. M., Fasullo, J. T., Gilson, J.,
Goni, G., Good, S. A., Gorman, J. M., Gouretski, V., Ishii, M., Johnson, G.
C., Kizu, S., Lyman, J. M., Macdonald, A. M., Minkowycz, W. J., Moffitt, S.
E., Palmer, M. D., Piola, A. R., Reseghetti, F., Schuckmann, K., Trenberth,
K. E., Velicogna, I., and Willis, J. K.: A review of global ocean temperature
observations: Implications for ocean heat content estimates and climate
change, Rev. Geophys., 51, 450–483, 10.1002/rog.20022, 2013. 2. Abram, N. J., Mulvaney, R., Vimeux, F., Phipps, S. J., Turner, J., and
England, M. H.: Evolution of the Southern Annular Mode during the past
millennium, Nat. Clim. Change, 4, 564–569, 2014. 3. Allan, R. J., Nicholls, N., Jones, P. D., and Butterworth, I. J.: A Further
Extension of the Tahiti-Darwin SOI, Early ENSO Events and Darwin Pressure,
J. Climate, 4, 743–749, 10.1175/1520-0442(1991)004<0743:afeott>2.0.co;2, 1991. 4. Anderson, R. F., Ali, S., Bradtmiller, L. I., Nielsen, S. H. H., Fleisher,
M. Q., Anderson, B. E., and Burckle, L. H.: Wind-Driven Upwelling in the
Southern Ocean and the Deglacial Rise in Atmospheric CO2, Science, 323,
1443–1448, https://doi.org/10.1126/science.1167441, 2009. 5. Arblaster, J., Meehl, G., and Karoly, D.: Future climate change in the
Southern Hemisphere: Competing effects of ozone and greenhouse gases,
Geophys. Res. Lett., 38, L02701, https://doi.org/10.1029/2010GL045384, 2011.
Cited by
44 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|