Winter Targeted Observing Periods during the Year of Polar Prediction in the Southern Hemisphere (YOPP-SH)

• Published in: Bulletin of the American Meteorological Society
• Main Authors: Bromwich, David, H, Gorodetskaya, Irina, V, Carpentier, Scott, Alexander, Simon, Bazile, Eric, Heinrich, Victoria, J, Massonnet, Francois, Powers, Jordan, G, Carrasco, Jorge, F, Cayette, Arthur, Choi, Taejin, Chyhareva, Anastasia, Colwell, Steven, R, Cordeira, Jason, M, Cordero, Raul, R, Doerenbecher, Alexis, Durán-Alarcón, Claudio, French, W. John R., Gonzalez-Herrero, Sergi, Guyot, Adrien, Haiden, Thomas, Hirasawa, Naohika, Imazio, Paola Rodriguez, Kawzenuk, Brian, Krakovska, Svitlana, Lazzara, Matthew, A, Litell, Mariana Fontolan, Manning, Kevin, W, Norris, Kimberley, Park, Sang-Jong, Ralph, F. Martin, Rowe, Penny, M, Sun, Qizhen, Vitale, Vito, Wille, Jonathan, D, Zhang, Zhenhai, Zou, Xun
• Other Authors: Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), ANR-20-CE01-0013,ARCA,Climatologie des rivières atmosphériques en Antarctique(2020)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2024
• Subjects: [SDE]Environmental Sciences; Antarctic; Southern Ocean; The Antarctic; Austral; Antarc*; Antarctica; Sea ice
• Online Access: https://hal.science/hal-04679643; https://hal.science/hal-04679643v1/document; https://hal.science/hal-04679643v1/file/bams-BAMS-D-22-0249.1.pdf; https://doi.org/10.1175/BAMS-D-22-0249.1

International audience Abstract The Year of Polar Prediction in the Southern Hemisphere (YOPP-SH) held seven Targeted Observing Periods (TOPs) during the 2022 austral winter to enhance atmospheric predictability over the Southern Ocean and Antarctica. The TOPs of 5-10 days duration each featured the release of additional radiosonde balloons, more than doubling the routine sounding program at the 24 participating stations run by 14 nations, together with process-oriented observations at selected sites. These extra sounding data are evaluated for their impact on forecast skill via data denial experiments with the goal of refining the observing system to improve numerical weather prediction for winter conditions. Extensive observations focusing on clouds and precipitation primarily during atmospheric river (AR) events are being applied to refine model microphysical parameterizations for the ubiquitous mixed phase clouds that frequently impact coastal Antarctica. Process studies are being facilitated by high time resolution series of observations and forecast model output via the YOPP Model Intercomparison and Improvement Project (YOPPsiteMIIP). Parallel investigations are broadening the scope and impact of the YOPP-SH winter TOPs. Studies of the Antarctic tourist industry’s use of weather services show the scope for much greater awareness of the availability of forecast products and the skill they exhibit. The SIPN South analysis of predictions of the sea ice growth period reveals that the forecast skill is superior to the sea ice retreat phase.