Articles | Volume 18, issue 7
https://doi.org/10.5194/essd-18-5399-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-5399-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description article
| 
24 Jul 2026
Data description article |
| 24 Jul 2026
| 24 Jul 2026
A multi-method Antarctic atmospheric blocking dataset (1979–2024)
Deniz Bozkurt
CORRESPONDING AUTHOR
Department of Meteorology, University of Valparaíso, Valparaíso, Chile
Center for Climate and Resilience Research CR2, Santiago, Chile
Center for Oceanographic Research COPAS COASTAL, University of Concepción, Concepción, Chile
Charlie Opazo
Center for Climate and Resilience Research CR2, Santiago, Chile
Department of Geophysics, University of Chile, Santiago, Chile
Julio C. Marín
Department of Meteorology, University of Valparaíso, Valparaíso, Chile
Center for Atmospheric Studies and Climate Change (CEACC), University of Valparaíso, Valparaíso, Chile
Kyle R. Clem
School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand
Benjamin Pohl
Biogéosciences, CNRS/Université Bourgogne Europe, Dijon, France
Victoire Buffet
Biogéosciences, CNRS/Université Bourgogne Europe, Dijon, France
Institut des Géosciences de l'Environnement, CNRS/Université Grenoble Alpes, Saint Martin d'Hères, France
Vincent Favier
Institut des Géosciences de l'Environnement, CNRS/Université Grenoble Alpes, Saint Martin d'Hères, France
Tomás Carrasco-Escaff
Center for Climate and Resilience Research CR2, Santiago, Chile
Bradford S. Barrett
independent researcher: Raleigh, NC, USA
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Cited articles
AMS (American Meteorological Society): “Blocking high.” Glossary of Meteorology, https://glossary.ametsoc.org/wiki/blocking-high/ (last access: 21 June 2026), 2026.
Baiman, R., Winters, A. C., Pohl, B., Favier, V., Wille, J. D., and Clem, K. R.: Synoptic and planetary-scale dynamics modulate Antarctic atmospheric river precipitation intensity, Commun. Earth Environ., 5, 127, https://doi.org/10.1038/s43247-024-01307-9, 2024.
Barnes, E. A., Dunn-Sigouin, E., Masato, G., and Woollings, T.: Exploring recent trends in Northern Hemisphere blocking, Geophys. Res. Lett., 41, 638–644, 2014.
Barrett, B. S., Lafluer, D. M., and Henderson, G. R.: Madden–Julian Oscillation modulation of Antarctic sea ice, Glacies, 2, 16, https://doi.org/10.3390/glacies2040016, 2025.
Barriopedro, D., García-Herrera, R., Lupo, A. R., and Hernández, E.: A Climatology of Northern Hemisphere Blocking, J. Climate, 19, 1042–1063, https://doi.org/10.1175/JCLI3678.1, 2006.
Berrisford, P., Hoskins, B. J., and Tyrlis, E.: Blocking and Rossby wave breaking on the dynamical tropopause in the Southern Hemisphere, J. Atmos. Sci., 64, 2881–2898, https://doi.org/10.1175/JAS3984.1, 2007.
Bozkurt, D., Rondanelli, R., Marín, J., and Garreaud, R.: Foehn event triggered by an atmospheric river underlies record-setting temperature along continental Antarctica, J. Geophys. Res.-Atmos., 123, 3871–3892, https://doi.org/10.1002/2017JD027796, 2018.
Bozkurt, D., Marín, J., and Barrett, B.: Temperature and moisture transport during atmospheric blocking patterns around the Antarctic Peninsula, Weather Clim. Extrem., 38, 100506, https://doi.org/10.1016/j.wace.2022.100506, 2022.
Bozkurt, D., Marín, J., Verdugo, C., and Barrett, B.: Atmospheric blocking and temperatures in the Antarctic Peninsula, Sci. Total Environ., 931, 172852, https://doi.org/10.1016/j.scitotenv.2024.172852, 2024.
Bozkurt, D., Opazo, C., Marín, J. C., Clem, K. R., Pohl, B., Buffet, V., Favier, V., Carrasco-Escaff, T., and Barrett, B. S.: A multi-method Antarctic atmospheric blocking dataset based on ERA5 (1979–2024), Zenodo [data set], https://doi.org/10.5281/zenodo.18329806, 2026.
Carrera, M. L., Higgins, R. W., and Kousky, V. E.: Downstream weather impacts associated with atmospheric blocking over the Northeast Pacific, J. Climate, 17, 4823–4839, https://doi.org/10.1175/JCLI-3237.1, 2004.
Clem, K. R., MacFerrin, M., Kennett, D., Bozkurt, D., and Scambos, T.: Record warmth and surface melt on the Antarctic Peninsula in February 2020, B. Am. Meteorol. Soc., 102, S328–S329, https://doi.org/10.1175/BAMS-D-21-0081.1, 2021.
Clem, K. R., Bozkurt, D., Kennett, D., King, J. C., and Turner, J.: Central tropical Pacific convection drives extreme high temperatures and surface melt on the Larsen C Ice Shelf, Antarctic Peninsula, Nat. Commun., 13, 3906, https://doi.org/10.1038/s41467-022-31119-4, 2022.
Clem, K. R., Batzli, S., Bozkurt, D., Bromwich, D. H., Cassano, J., Dice, M., Elvidge, A. D., Fogt, R. L., Gorodetskaya, I., Goyal, R., Katurji, M., Keller, L., King, J., Lazzara, M., Mikolajczyk, D., Norton, T., Rowe, P., Wang, S.-H., Van den Broeke, M., and Zou, X.: Meteorology and Climate of Antarctica, in: Meteorology and Climate of the Southern Hemisphere, edited by: Taschetto, A. S., Ndarana, T., and Ambrizzi, T., Cambridge University Press, 241–283, https://doi.org/10.1017/9781009352680.009, 2025.
Davini, P., Cagnazzo, C., Neale, R., and Tríbbia, J.: Coupling between Greenland blocking and the North Atlantic Oscillation pattern, Geophys. Res. Lett., 39, L14801, https://doi.org/10.1029/2012GL052315, 2012.
Dole, R. M.: The life cycle of persistent anomalies and blocking over the North Pacific, Adv. Geophys., 29, 31–69, 1986.
Dole, R. M. and Gordon, N. D.: Persistent anomalies of the extratropical Northern Hemisphere wintertime circulation: Geographical distribution and regional persistence characteristics, Mon. Weather Rev., 111, 1567–1586, https://doi.org/10.1175/1520-0493(1983)111<1567:PAOTEN>2.0.CO;2, 1983.
Dong, L. and Colucci, S. J.: The role of deformation and potential vorticity in Southern Hemisphere blocking onsets, J. Atmos. Sci., 62, 4043–4056, https://doi.org/10.1175/JAS3576.1, 2005.
Fogt, R. L., Jones, J. M., and Renwick, J.: Seasonal zonal asymmetries in the Southern Annular Mode and their impact on regional temperature anomalies, J. Climate, 25, 6253–6270, https://doi.org/10.1175/JCLI-D-11-00474.1, 2012.
Francis, D., Fonseca, R., Nelli, N., Heil, P., Wille, J. D., Gorodetskaya, I. V., and Massom, R. A.: Drivers of observed winter–spring sea-ice and snow thickness at a coastal site in East Antarctica, The Cryosphere, 20, 1–28, https://doi.org/10.5194/tc-20-1-2026, 2026.
Gilbert, E., Pishniak, D., Torres, J. A., Orr, A., Maclennan, M., Wever, N., and Verro, K.: Extreme precipitation associated with atmospheric rivers over West Antarctic ice shelves: insights from kilometre-scale regional climate modelling, The Cryosphere, 19, 597–618, https://doi.org/10.5194/tc-19-597-2025, 2025.
Gorodetskaya, I. V., Tsukernik, M., Claes, K., Ralph, M. F., Neff, W. D., and van Lipzig, N. P. M.: The role of atmospheric rivers in anomalous snow accumulation in East Antarctica, Geophys. Res. Lett., 41, 6199–6206, https://doi.org/10.1002/2014GL060881, 2014.
Gorodetskaya, I. V., Durán-Alarcón, C., González-Herrero, S., Clem, K. R., Zou, X., Rowe, P., Rodriguez Imazio, P., Campos, D., Leroy-Dos Santos, C., Dutrievoz, N., Wille, J. D., Chyhareva, A., Favier, V., Blanchet, J., Pohl, B., Cordero, R. R., Park, S.-J., Colwell, S., Lazzara, M. A., Carrasco, J., Gulisano, A. M., Krakovska, S., Ralph, F. M., Dethinne, T., and Picard, G.: Record-high Antarctic Peninsula temperatures and surface melt in February 2022, npj Clim. Atmos. Sci., 6, 202, https://doi.org/10.1038/s41612-023-00529-6, 2023.
Grotjahn, R., Black, R., Leung, R., Wehner, M. F., Barlow, M., Bosilovich, M., Gershunov, A., Gutowski Jr., W. J., Gyakum, J. R., Katz, R. W., Lee, Y.-Y., Lim, Y.-K., and Prabhat: North American extreme temperature events and related large scale meteorological patterns: a review of statistical methods, dynamics, modeling, and trends, Clim. Dynam., 46, 1151–1184, https://doi.org/10.1007/s00382-015-2638-6, 2016.
Hanna, E., Francis, J., Wang, M., Overland, J. E., Cohen, J., Luo, D., Vihma, T., Fu, Q., Hall, R. J., Jaiser, R., Kim, S.-J., Köhler, R., Luu, L., Shen, X., Erner, I., Ukita, J., Yao, Y., Ye, K., Choi, H., and Skific, N.: Influence of high-latitude blocking and the northern stratospheric polar vortex on cold-air outbreaks under Arctic amplification of global warming, Environ. Res.: Clim., 3, 042004, https://doi.org/10.1088/2752-5295/ad93f3, 2024.
Hauser, S., Teubler, F., Riemer, M., Knippertz, P., and Grams, C. M.: Life cycle dynamics of Greenland blocking from a potential vorticity perspective, Weather Clim. Dynam., 5, 633–658, https://doi.org/10.5194/wcd-5-633-2024, 2024.
Hauser, S., Teubler, F., Riemer, M., and Grams, C. M.: A quasi-Lagrangian perspective on the role of dry and moist processes in the formation of blocked North Atlantic–European weather regimes, Weather Clim. Dynam., 7, 937–958, https://doi.org/10.5194/wcd-7-937-2026, 2026.
Henderson, G. R., Barrett, B. S., Lois, A., and Elsaawy, H.: Time-lagged response of the Antarctic atmosphere to tropical MJO convection, Mon. Weather Rev., 146, 1219–1231, https://doi.org/10.1175/MWR-D-17-0224.1, 2018.
Henderson, G. R., Barrett, B. S., Wachowicz, L. J., Mattingly, K. S., Preece, J. R., and Mote, T. L.: Local and remote atmospheric circulation drivers of Arctic change: A review, Front. Earth Sci., 9, 709896, https://doi.org/10.3389/feart.2021.709896, 2021.
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., De Chiara, G., Dahlgren, P., Dee, D., Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer, A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková, M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., de Rosnay, P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.-N.: The ERA5 global reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049, https://doi.org/10.1002/qj.3803, 2020.
Hoffmann, L. and Spang, R.: An assessment of tropopause characteristics of the ERA5 and ERA-Interim meteorological reanalyses, Atmos. Chem. Phys., 22, 4019–4046, https://doi.org/10.5194/acp-22-4019-2022, 2022.
Hoskins, B. and Woollings, T.: Persistent Extratropical Regimes and Climate Extremes, Current Climate Change Reports, 1, 115–124, 2015.
Hoskins, B. J., McIntyre, M. E., and Robertson, A. W.: On the use and significance of isentropic potential vorticity maps, Q. J. Roy. Meteor. Soc., 111, 877–946, https://doi.org/10.1002/qj.49711147002, 1985.
Liang, K., Wang, J., Luo, H., and Yang, Q.: The role of atmospheric rivers in Antarctic sea ice variations, Geophys. Res. Lett., 50, e2022GL102588, https://doi.org/10.1029/2022GL102588, 2023.
Lim, E.-P., Thompson, D. W. J., Butler, A. H., Wheeler, M. C., Nakamura, H., Jucker, M., Arblaster, J. M., Hendon, H. H., Newman, P. A., and Coy, L.: Characteristics of Antarctic stratospheric variability during winter: A case study of the 2024 sudden stratospheric warming and its surface impacts, J. Geophys. Res.-Atmos., 131, e2025JD045089, https://doi.org/10.1029/2025JD045089, 2026.
Liu, Z. and Wang, L.: Enhanced occurrence of atmospheric blocking in the Southern Hemisphere by baroclinic annular mode, Geophys. Res. Lett., 51, e2023GL107343, https://doi.org/10.1029/2023GL107343, 2024.
Maclennan, M. L., Lenaerts, J. T. M., Shields, C. A., Hoffman, A. O., Wever, N., Thompson-Munson, M., Winters, A. C., Pettit, E. C., Scambos, T. A., and Wille, J. D.: Climatology and surface impacts of atmospheric rivers on West Antarctica, The Cryosphere, 17, 865–881, https://doi.org/10.5194/tc-17-865-2023, 2023.
Marín, J., Bozkurt, D., and Barrett, B.: Atmospheric blocking trends and seasonality around the Antarctic Peninsula, J. Climate, 35, 3803–3818, https://doi.org/10.1175/JCLI-D-21-0323.1, 2022.
Marshall, G. J. and King, J. C.: Southern Hemisphere circulation anomalies associated with extreme Antarctic Peninsula winter temperatures, Geophys. Res. Lett., 25, 2437–2440, https://doi.org/10.1029/98GL01651, 1998.
Marshall, G. J., Orr, A., van Lipzig, N. P. M., and King, J. C.: The impact of a changing Southern Hemisphere annular mode on Antarctic Peninsula summer temperatures, J. Climate, 19, 5388–5404, https://doi.org/10.1175/JCLI3844.1, 2006.
Masato, G., Hoskins, B. J., and Woollings, T.: Wave-breaking characteristics of Northern Hemisphere winter blocking: a two-dimensional approach, J. Climate, 26, 4535–4549, https://doi.org/10.1175/JCLI-D-12-00240.1, 2013.
Nakamura, N. and Huang, C. S. Y.: Atmospheric blocking as a traffic jam in the jet stream, Science, 361, 42–47, https://doi.org/10.1126/science.aat0721, 2018.
Patterson, M., Bracegirdle, T., and Woollings, T.: Southern Hemisphere atmospheric blocking in CMIP5 and future changes in the Australia–New Zealand sector, Geophys. Res. Lett., 46, 9281–9290, https://doi.org/10.1029/2019GL083264, 2019.
Pepler, A.: Projections of synoptic anticyclones for the twenty-first century, Clim. Dynam., 61, 3271–3287, https://doi.org/10.1007/s00382-023-06728-4, 2023.
Pinheiro, M. C., Ullrich, P. A., and Grotjahn, R.: Atmospheric blocking and intercomparison of objective detection methods: flow field characteristics, Clim. Dynam., 53, 4189–4216, https://doi.org/10.1007/s00382-019-04782-5, 2019.
Ploeger, F., Diallo, M., Charlesworth, E., Konopka, P., Legras, B., Laube, J. C., Grooß, J.-U., Günther, G., Engel, A., and Riese, M.: The stratospheric Brewer–Dobson circulation inferred from age of air in the ERA5 reanalysis, Atmos. Chem. Phys., 21, 8393–8412, https://doi.org/10.5194/acp-21-8393-2021, 2021.
Pohl, B., Favier, V., Wille, J., Udy, D. G., Vance, T. R., Pergaud, J., Dutrievoz, N., Blanchet, J., Kittel, C., Amory, C., Krinner, G., and Codron, F.: Relationship between weather regimes and atmospheric rivers in East Antarctica, J. Geophys. Res.-Atmos., 126, e2021JD035294, https://doi.org/10.1029/2021JD035294, 2021.
Polster, C. and Wirth, V.: A new atmospheric background state to diagnose local waveguidability, Geophys. Res. Lett., 50, e2023GL106166, https://doi.org/10.1029/2023GL106166, 2023.
Renwick, J. A.: ENSO-related variability in the frequency of South Pacific blocking, Mon. Weather Rev., 126, 3117–3123, https://doi.org/10.1175/1520-0493(1998)126<3117:ERVITF>2.0.CO;2, 1998.
Renwick, J. A. and Revell, M. J.: Blocking over the South Pacific and Rossby wave propagation, Mon. Weather Rev., 127, 2233–2247, https://doi.org/10.1175/1520-0493(1999)127<2233:BOTSPA>2.0.CO;2, 1999.
Rex, D. F.: Blocking action in the middle troposphere and its effect upon regional climate, Tellus, 2, 196–211, https://doi.org/10.1111/j.2153-3490.1950.tb00331.x, 1950.
Rondanelli, R., Hatchett, B., Rutllant, J., Bozkurt, D., and Garreaud, R.: Strongest MJO on record triggers extreme Atacama rainfall and warmth in Antarctica, Geophys. Res. Lett., 46, 3482–3491, https://doi.org/10.1029/2018GL081475, 2019.
Scherrer, S. C., Croci-Maspoli, M., Schwierz, C., and Appenzeller, C.: Two-dimensional indices of atmospheric blocking and their statistical relationship with winter climate patterns in the Euro-Atlantic region, Int. J. Climatol., 26, 233–249, https://doi.org/10.1002/joc.1250, 2006.
Schwierz, C., Croci-Maspoli, M., and Davies, H. C.: Perspicacious indicators of atmospheric blocking, Geophys. Res. Lett., 31, L06125, https://doi.org/10.1029/2003GL019341, 2004.
Sousa, P. M., Barriopedro, D., García-Herrera, R., Woollings, T., and Trigo, R. M.: A new combined detection algorithm for blocking and subtropical ridges, J. Climate, 34, 7735–7758, https://doi.org/10.1175/JCLI-D-20-0658.1, 2021.
Tang, H., Li, S., Jones, J. M., González-Herrero, S., Orr, A., Otto, F. E. L., Screen, J. A., Clem, K. R., Bozkurt, D., Catto, J. L., Suitters, C. C., Maclennan, M. L., and Sun, Y.: Unprecedented 2024 East Antarctic winter heatwave driven by polar vortex weakening and amplified by anthropogenic warming, npj Clim. Atmos. Sci., 9, 122, https://doi.org/10.1038/s41612-026-01392-x, 2026.
Tibaldi, S. and Molteni, F.: On the operational predictability of blocking, Tellus, 42A, 343–365, https://doi.org/10.3402/tellusa.v42i3.11882, 1990.
Tibaldi, S., D'Andrea, F., Tosi, E., and Roeckner, E.: Climatology of the northern hemisphere blocking in the ECHAM model, Clim. Dynam., 13, 649–666, 1997.
Trenberth, K. E. and Mo, K. C.: Blocking in the Southern Hemisphere, Mon. Weather Rev., 113, 3–21, https://doi.org/10.1175/1520-0493(1985)113<0003:BITSH>2.0.CO;2, 1985.
Turner, J., Lu, H., King, J. C., Carpentier, S., Lazzara, M., Phillips, T., and Wille, J.: An extreme high temperature event in coastal East Antarctica associated with an atmospheric river and record summer downslope winds, Geophys. Res. Lett., 49, e2021GL097108, https://doi.org/10.1029/2021GL097108, 2022.
Ullrich, P. A., Zarzycki, C. M., McClenny, E. E., Pinheiro, M. C., Stansfield, A. M., and Reed, K. A.: TempestExtremes v2.1: a community framework for feature detection, tracking, and analysis in large datasets, Geosci. Model Dev., 14, 5023–5048, https://doi.org/10.5194/gmd-14-5023-2021, 2021.
Wachowicz, L., Preece, J., Mote, T., Barrett, B. S., and Henderson, G. R.: Historical trends of seasonal Greenland blocking under different blocking metrics, Int. J. Clim., 41, E3263–E3278, https://doi.org/10.1002/joc.6923, 2021.
Wang, G., Hendon, H. H., Arblaster, J. M., Lim, E.-P., Abhik, S., and van Rensch, P.: Compounding Tropical and Stratospheric Forcing of the Record Low Antarctic Sea-Ice in 2016, Nat. Commun., 10, 13, https://doi.org/10.1038/s41467-018-07689-7, 2019.
Wang, S., Ding, M., Liu, G., Li, G., and Chen, W.: Blocking events in East Antarctica: impact on precipitation and their association with large-scale atmospheric circulation modes, J. Climate, 37, 1333–1345, https://doi.org/10.1175/JCLI-D-23-0419.1, 2024.
Wille, J. D., Favier, V., Gorodetskaya, I. V., Agosta, C., Baiman, R., Barrett, J. E., Barthelemy, L., Boza, B., Bozkurt, D., Casado, M., Chyhareva, A., Clem, K. R., Codron, F., Datta, R. T., Durán-Alarcón, C., Francis, D., Hoffman, A. O., Kolbe, M., Krakovska, S., Linscott, G., Maclennan, M. L., Mattingly, K. S., Mu, Y., Pohl, B., Leroy-Dos Santos, C., Shields, C. A., Toker, E., Winters, A. C., Yin, Z., Zou, X., Zhang, C., and Zhang, Z.: Atmospheric rivers in Antarctica, Nat. Rev. Earth Environ., 6, 178–192, https://doi.org/10.1038/s43017-024-00638-7, 2025.
Wille, J. D., Favier, V., Jourdain, N. C., Kittel, C., Turton, J. V., Agosta, C., Gorodetskaya, I. V., Picard, G., Codron, F., Leroy-Dos Santos, C., Amory, C., Fettweis, X., Blanchet, J., Jomelli, V., and Berchet, A.: Intense atmospheric rivers can weaken ice shelf stability at the Antarctic Peninsula, Commun. Earth Environ., 3, 90, https://doi.org/10.1038/s43247-022-00422-9, 2022.
Wille, J. D., Alexander, S. P., Amory, C., Baiman, R., Barthélemy, L., Bergstrom, D. M., Berne, A., Binder, H., Blanchet, J., Bozkurt, D., Bracegirdle, T. J., Casado, M., Choi, T., Clem, K. R., Codron, F., Datta, R., Di Battista, S., Favier, V., Francis, D., Fraser, A. D., Fourré, E., Garreaud, R. D., Genthon, C., Gorodetskaya, I. V., González-Herrero, S., Heinrich, V. J., Hubert, G., Joos, H., Kim, S.-J., King, J. C., Kittel, C., Landais, A., Lazzara, M., Leonard, G. H., Lieser, J. L., Maclennan, M., Mikolajczyk, D., Neff, P., Ollivier, I., Picard, G., Pohl, B., Ralph, F. M., Rowe, P., Schlosser, E., Shields, C. A., Smith, I. J., Sprenger, M., Trusel, L., Udy, D., Vance, T., Vignon, É., Walker, C., Wever, N., and Zou, X.: The Extraordinary March 2022 East Antarctica “Heat” Wave. Part I: Observations and Meteorological Drivers, J. Climate, 37, 757–778, https://doi.org/10.1175/JCLI-D-23-0175.1, 2024a.
Wille, J. D., Pohl, B., Favier, V., Winters, A. C., Baiman, R., Cavallo, S. M., Leroy-Dos Santos, C., Clem, K., Udy, D. G., Vance, T. R., Gorodetskaya, I., Codron, F., and Berchet, A.: Examining atmospheric river life cycles in East Antarctica, J. Geophys. Res.-Atmos., 129, e2023JD039970, https://doi.org/10.1029/2023JD039970, 2024b.
Woollings, T., Barriopedro, D., Methven, J., Son, S.-W., Martius, O., Harvey, B., Sillmann, J., Lupo, A. R., and Seneviratne, S.: Blocking and its response to climate change, Curr. Clim. Change Rep., 4, 287–300, https://doi.org/10.1007/s40641-018-0108-z, 2018.
Xu, M., Yu, L., Liang, K., Vilma, T., Bozkurt, D., Hu, X., and Yang, Q.: Dominant role of vertical air flows in the unprecedented warming on the Antarctic Peninsula in February 2020, Commun. Earth Environ., 2, 133, https://doi.org/10.1038/s43247-021-00203-w, 2021.
Zhai, Z., Wang, Y., Wu, Q., and Hou, S.: Record-breaking warm late-winter over Antarctica in 2024: the role of Western Pacific Warm Pool and Pacific Decadal Oscillation, Geophys. Res. Lett., 52, e2024GL114528, https://doi.org/10.1029/2024GL114528, 2025.
Short summary
Atmospheric blocking near Antarctica drives long lasting circulation anomalies and extreme events, yet it remains poorly understood. We created a new public dataset for 1979 to 2024 using global reanalysis data and several detection methods applied in a consistent way. We found strong method dependent differences in how often, where, and how long blocking occurs, showing that no single approach captures all forms of Antarctic blocking.
Atmospheric blocking near Antarctica drives long lasting circulation anomalies and extreme...
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