Search Results - "Kjær, Helle A."

A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica by Winstrup, Mai, Vallelonga, Paul, Kjaer, Helle A, Fudge, Tyler J, Lee, James E, Riis, Marie H, Edwards, Ross, Bertler, Nancy A. N, Blunier, Thomas, Brook, Ed J, Buizert, Christo, Ciobanu, Gabriela, Conway, Howard, Dahl-Jensen, Dorthe, Ellis, Aja, Emanuelsson, B. Daniel, Hindmarsh, Richard C. A, Keller, Elizabeth D, Kurbatov, Andrei V, Mayewski, Paul A, Neff, Peter D, Pyne, Rebecca L, Simonsen, Marius F, Svensson, Anders, Tuohy, Andrea, Waddington, Edwin D, Wheatley, Sarah

“…We present a 2700-year annually resolved chronology and snow accumulation history for the Roosevelt Island Climate Evolution (RICE) ice core, Ross Ice Shelf,…”
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El Niño–Southern Oscillation signal in a new East Antarctic ice core, Mount Brown South by Crockart, Camilla K, Vance, Tessa R, Fraser, Alexander D, Abram, Nerilie J, Criscitiello, Alison S, Curran, Mark A. J, Favier, Vincent, Gallant, Ailie J. E, Kittel, Christoph, Kjær, Helle A, Klekociuk, Andrew R, Jong, Lenneke M, Moy, Andrew D, Plummer, Christopher T, Vallelonga, Paul T, Wille, Jonathon, Zhang, Lingwei

“…Paleoclimate archives, such as high-resolution ice core records, provide a means to investigate past climate variability. Until recently, the Law Dome (Dome…”
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A novel approach to process brittle ice for continuous flow analysis of stable water isotopes by PYNE, REBECCA L., KELLER, ELIZABETH D., CANESSA, SILVIA, BERTLER, NANCY A. N., PYNE, ALEX R., MANDENO, DARCY, VALLELONGA, PAUL, SEMPER, STEFANIE, KJÆR, HELLE A., HUTCHINSON, ED, BAISDEN, W. TROY

“…Brittle ice, which occurs in all intermediate-depth and deep ice cores retrieved from high-latitude regions, presents a challenge for high-resolution…”
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High-resolution aerosol concentration data from the Greenland NorthGRIP and NEEM deep ice cores by Erhardt, Tobias, Bigler, Matthias, Federer, Urs, Gfeller, Gideon, Leuenberger, Daiana, Stowasser, Olivia, Röthlisberger, Regine, Schüpbach, Simon, Ruth, Urs, Twarloh, Birthe, Wegner, Anna, Goto-Azuma, Kumiko, Kuramoto, Takayuki, Kjær, Helle A, Vallelonga, Paul T, Siggaard-Andersen, Marie-Louise, Hansson, Margareta E, Benton, Ailsa K, Fleet, Louise G, Mulvaney, Rob, Thomas, Elizabeth R, Abram, Nerilie, Stocker, Thomas F, Fischer, Hubertus

“…Records of chemical impurities from ice cores enable us to reconstruct the past deposition of aerosols onto polar ice sheets and alpine glaciers. Through this…”
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Past perspectives on the present era of abrupt Arctic climate change by Jansen, Eystein, Christensen, Jens Hesselbjerg, Dokken, Trond, Nisancioglu, Kerim H., Vinther, Bo M., Capron, Emilie, Guo, Chuncheng, Jensen, Mari F., Langen, Peter L., Pedersen, Rasmus A., Yang, Shuting, Bentsen, Mats, Kjær, Helle A., Sadatzki, Henrik, Sessford, Evangeline, Stendel, Martin

“…Abrupt climate change is a striking feature of many climate records, particularly the warming events in Greenland ice cores. These abrupt and high-amplitude…”
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Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century by Cuevas, Carlos A., Maffezzoli, Niccolò, Corella, Juan Pablo, Spolaor, Andrea, Vallelonga, Paul, Kjær, Helle A., Simonsen, Marius, Winstrup, Mai, Vinther, Bo, Horvat, Christopher, Fernandez, Rafael P., Kinnison, Douglas, Lamarque, Jean-François, Barbante, Carlo, Saiz-Lopez, Alfonso

“…Atmospheric iodine causes tropospheric ozone depletion and aerosol formation, both of which have significant climate impacts, and is an essential dietary…”
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Role of mineral dust in the nitrate preservation during the glacial period: Insights from the RICE ice core by Venugopal, Abhijith U., Bertler, Nancy A.N., Pyne, Rebecca L., Kjær, Helle A., Winton, V. Holly L., Mayewski, Paul A., Cortese, Giuseppe

“…Nitrate (NO3−), an abundant aerosol in polar snow, is a complex environmental proxy to interpret owing to its diverse sources and susceptibility to…”
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Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes by Sadatzki, Henrik, Maffezzoli, Niccolò, Dokken, Trond M., Simon, Margit H., Berben, Sarah M. P., Fahl, Kirsten, Kjær, Helle A., Spolaor, Andrea, Stein, Ruediger, Vallelonga, Paul, Vinther, Bo M., Jansen, Eystein

“…Constraining the past sea ice variability in the Nordic Seas is critical for a comprehensive understanding of the abrupt Dansgaard-Oeschger (D-O) climate…”
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Climate changes modulated the history of Arctic iodine during the Last Glacial Cycle by Corella, Juan Pablo, Maffezzoli, Niccolo, Spolaor, Andrea, Vallelonga, Paul, Cuevas, Carlos A., Scoto, Federico, Müller, Juliane, Vinther, Bo, Kjær, Helle A., Cozzi, Giulio, Edwards, Ross, Barbante, Carlo, Saiz-Lopez, Alfonso

“…Iodine has a significant impact on promoting the formation of new ultrafine aerosol particles and accelerating tropospheric ozone loss, thereby affecting…”
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Greenland 2012 melt event effects on CryoSat-2 radar altimetry by Nilsson, Johan, Vallelonga, Paul, Simonsen, Sebastian B., Sørensen, Louise Sandberg, Forsberg, René, Dahl-Jensen, Dorthe, Hirabayashi, Motohiro, Goto-Azuma, Kumiko, Hvidberg, Christine S., Kjær, Helle A., Satow, Kazuhide

“…CryoSat‐2 data are used to study elevation changes over an area in the interior part of the Greenland Ice Sheet during the extreme melt event in July 2012. The…”
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Antarctic evidence for an abrupt northward shift of the Southern Hemisphere westerlies at 32 ka BP by Venugopal, Abhijith U., Bertler, Nancy A. N., Severinghaus, Jeffrey P., Brook, Edward J., Cortese, Giuseppe, Lee, James E., Blunier, Thomas, Mayewski, Paul A., Kjær, Helle A., Carter, Lionel, Weber, Michael E., Levy, Richard H., Pyne, Rebecca L., Vandergoes, Marcus J.

“…High-resolution ice core records from coastal Antarctica are particularly useful to inform our understanding of environmental changes and their drivers. Here,…”
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Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica by Philippe, Morgane, Tison, Jean-Louis, Fjøsne, Karen, Hubbard, Bryn, Kjær, Helle A, Lenaerts, Jan T. M, Drews, Reinhard, Sheldon, Simon G, De Bondt, Kevin, Claeys, Philippe, Pattyn, Frank

“…Ice cores provide temporal records of surface mass balance (SMB). Coastal areas of Antarctica have relatively high and variable SMB, but are under-represented…”
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An annually resolved chronology for the Mount Brown South ice cores, East Antarctica by Vance, Tessa R, Abram, Nerilie J, Criscitiello, Alison S, Crockart, Camilla K, DeCampo, Aylin, Favier, Vincent, Gkinis, Vasileios, Harlan, Margaret, Jackson, Sarah L, Kjær, Helle A, Long, Chelsea A, Nation, Meredith K, Plummer, Christopher T, Segato, Delia, Spolaor, Andrea, Vallelonga, Paul T

“…Climate reconstructions of the last millennium rely on networks of high-resolution and well-dated proxy records. This study presents age-at-depth data and…”
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The Greenland spatial fingerprint of Dansgaard-Oeschger events in observations and models by Buizert, Christo, Sowers, Todd A, Niezgoda, Kyle, Blunier, Thomas, Gkinis, Vasileios, Harlan, Margaret, He, Chengfei, Jones, Tyler R, Kjaer, Helle A, Liisberg, Jesper B, Menking, James A, Morris, Valerie, Noone, David, Rasmussen, Sune Olander, Sime, Louise C, Steffensen, Jørgen P, Svensson, Anders, Vaughn, Bruce H, Vinther, Bo M, White, James W C

“…Pleistocene Ice Ages display abrupt Dansgaard-Oeschger (DO) climate oscillations that provide prime examples of Earth System tipping points-abrupt transition…”
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The Ross Sea Dipole – temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years by Bertler, Nancy A. N., Conway, Howard, Dahl-Jensen, Dorthe, Emanuelsson, Daniel B., Winstrup, Mai, Vallelonga, Paul T., Lee, James E., Brook, Ed J., Severinghaus, Jeffrey P., Fudge, Taylor J., Keller, Elizabeth D., Baisden, W. Troy, Hindmarsh, Richard C. A., Neff, Peter D., Blunier, Thomas, Edwards, Ross, Mayewski, Paul A., Kipfstuhl, Sepp, Buizert, Christo, Canessa, Silvia, Dadic, Ruzica, Kjær, Helle A., Kurbatov, Andrei, Zhang, Dongqi, Waddington, Edwin D., Baccolo, Giovanni, Beers, Thomas, Brightley, Hannah J., Carter, Lionel, Clemens-Sewall, David, Ciobanu, Viorela G., Delmonte, Barbara, Eling, Lukas, Ellis, Aja, Ganesh, Shruthi, Golledge, Nicholas R., Haines, Skylar, Handley, Michael, Hawley, Robert L., Hogan, Chad M., Johnson, Katelyn M., Korotkikh, Elena, Lowry, Daniel P., Mandeno, Darcy, McKay, Robert M., Menking, James A., Naish, Timothy R., Noerling, Caroline, Ollive, Agathe, Orsi, Anaïs, Proemse, Bernadette C., Pyne, Alexander R., Pyne, Rebecca L., Renwick, James, Scherer, Reed P., Semper, Stefanie, Simonsen, Marius, Sneed, Sharon B., Steig, Eric J., Tuohy, Andrea, Venugopal, Abhijith Ulayottil, Valero-Delgado, Fernando, Venkatesh, Janani, Wang, Feitang, Wang, Shimeng, Winski, Dominic A., Winton, V. Holly L., Whiteford, Arran, Xiao, Cunde, Yang, Jiao, Zhang, Xin

“…High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future…”
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