Mercator Fellowships
Dr. Matthew Shupe (University of Colorado Boulder, USA)
Phase II – Phase III
Matthew Shupe has closely been engaged since the beginning of (AC)³. At first he served as a member of the Scientific Advisory Board (SAB) of (AC)³, later he was elected as an Associated Member (AM). He contributes to (AC)³ with his expertise in Arctic cloud, atmosphere, and surface energy budget processes, via his long-term research with Arctic observations at many locations, and via his role as co-coordinator of the MOSAiC expedition. Dr. Shupe served as a Mercator Fellow during phase II of (AC)³, visiting Leipzig for three extended stays totaling about 6 months’ time, in addition to teaching at the (AC)³ winter school in 2023, and visiting Germany multiple other times for MOSAiC-specific activities. During the visits, he spent time at Uni Leipzig, TROPOS, Uni Cologne and AWI. Four (AC)³ PhDs have also visited him in Boulder to gain valuable international exposure and collaboration. The frequent visits in both directions have allowed for extended interactions with PhDs and researchers linked to many of the (AC)³ research projects, and have supported numerous collaborations especially on topics related to clouds, radiation, and MOSAiC. These collaborations have resulted in several publications coauthored by Shupe and other (AC)³ members on topics including: multiple programmatic overviews, mixed-phase cloud properties, aerosol-cloud interactions, cloud-radiation interactions, balloon-based observations of radiation and aerosols, air mass transformation processes, assessment of satellite cloud products, warm air intrusions, and the lapse rate feedback. During phase III, Dr. Shupe will continue making 1-2 visits per year to Germany to nurture and expand ongoing collaborative activities with (AC)³ researchers, primarily based in Leipzig but also visiting other institutions and participating in key (AC)³ meetings. These visits will typically span 3-8 weeks each to enable meaningful, long-term interactions. While Dr. Shupe will engage with many (AC)³ projects, he will work most closely with researchers on projects: A01, A02, A03, B01, C01, E01, E03, E04, E05. Moreover, he will continue to develop strong connections with many (AC)³ PhDs, as he has done during phase II.
Maahn, M., Moisseev, D., Steinke, I., Maherndl, N., and Shupe, M. D., 2024: Introducing the Video In Situ Snowfall Sensor (VISSS), Atmos. Meas. Tech., 17, 899–919, https://doi.org/10.5194/amt-17-899-2024.
Wendisch, M., Stapf, J., Becker, S., Ehrlich, A., Jäkel, E., Klingebiel, M., Lüpkes, C., Schäfer, M., and Shupe, M. D., 2023: Effects of variable ice–ocean surface properties and air mass transformation on the Arctic radiative energy budget, Atmos. Chem. Phys., 23, 9647–9667, https://doi.org/10.5194/acp-23-9647-2023.
Pilz, C.; Lonardi, M.; Egerer, U.; Siebert, H.; Ehrlich, A.; Heymsfield, A.; Schmitt, C.; Shupe, M. D.; Wehner, B. & Wendisch, M., 2023: Profile observations of the Arctic atmospheric boundary layer with the BELUGA tethered balloon during MOSAiC. Sci Data 10, 534 (2023). https://doi.org/10.1038/s41597-023-02423-5
Vinjamuri, K. S., Vountas, M., Lelli, L., Stengel, M., Shupe, M. D., Ebell, K., and Burrows, J. P., 2023: Validation of the Cloud_CCI (Cloud Climate Change Initiative) cloud products in the Arctic, Atmos. Meas. Tech., 16, 2903–2918, https://doi.org/10.5194/amt-16-2903-2023.
Kirbus, B.; Tiedeck, S.; Camplani, A.; Chylik, J.; Crewell, S.; Dahlke, S.; Ebell, K.; Gorodetskaya, I.; Griesche, H.; Handorf, D.; Höschel, I.; Lauer, M.; Neggers, R.; Rückert, J.; Shupe, M. D.; Spreen, G.; Walbröl, A.; Wendisch, M. & Rinke, A., 2023: Surface impacts and associated mechanisms of a moisture intrusion into the Arctic observed in mid-April 2020 during MOSAiC, Front. Earth Sci., 11, https://doi.org/10.3389/feart.2023.1147848
Wendisch, M.; Brückner, M.; Crewell, S.; Ehrlich, A.; Notholt, J.; Lüpkes, C.; Macke, A.; Burrows, J. P.; Rinke, A.; Quaas, J.; Maturilli, M.; Schemann, V.; Shupe, M. D.; Akansu, E. F.; Barrientos-Velasco, C.; Bärfuss, K.; Blechschmidt, A.-M.; Block, K.; Bougoudis, I.; Bozem, H.; Böckmann, C.; Bracher, A.; Bresson, H.; Bretschneider, L.; Buschmann, M.; Chechin, D. G.; Chylik, J.; Dahlke, S.; Deneke, H.; Dethloff, K.; Donth, T.; Dorn, W.; Dupuy, R.; Ebell, K.; Egerer, U.; Engelmann, R.; Eppers, O.; Gerdes, R.; Gierens, R.; Gorodetskaya, I. V.; Gottschalk, M.; Griesche, H.; Gryanik, V. M.; Handorf, D.; Harm-Altstädter, B.; Hartmann, J.; Hartmann, M.; Heinold, B.; Herber, A.; Herrmann, H.; Heygster, G.; Höschel, I.; Hofmann, Z.; Hölemann, J.; Hünerbein, A.; Jafariserajehlou, S.; Jäkel, E.; Jacobi, C.; Janout, M.; Jansen, F.; Jourdan, O.; Jurányi, Z.; Kalesse-Los, H.; Kanzow, T.; Käthner, R.; Kliesch, L. L.; Klingebiel, M.; Knudsen, E. M.; Kovács, T.; Körtke, W.; Krampe, D.; Kretzschmar, J.; Kreyling, D.; Kulla, B.; Kunkel, D.; Lampert, A.; Lauer, M.; Lelli, L.; von Lerber, A.; Linke, O.; Löhnert, U.; Lonardi, M.; Losa, S. N.; Losch, M.; Maahn, M.; Mech, M.; Mei, L.; Mertes, S.; Metzner, E.; Mewes, D.; Michaelis, J.; Mioche, G.; Moser, M.; Nakoudi, K.; Neggers, R.; Neuber, R.; Nomokonova, T.; Oelker, J.; Papakonstantinou-Presvelou, I.; Pätzold, F.; Pefanis, V.; Pohl, C.; van Pinxteren, M.; Radovan, A.; Rhein, M.; Rex, M.; Richter, A.; Risse, N.; Ritter, C.; Rostosky, P.; Rozanov, V. V.; Donoso, E. R.; Saavedra-Garfias, P.; Salzmann, M.; Schacht, J.; Schäfer, M.; Schneider, J.; Schnierstein, N.; Seifert, P.; Seo, S.; Siebert, H.; Soppa, M. A.; Spreen, G.; Stachlewska, I. S.; Stapf, J.; Stratmann, F.; Tegen, I.; Viceto, C.; Voigt, C.; Vountas, M.; Walbröl, A.; Walter, M.; Wehner, B.; Wex, H.; Willmes, S.; Zanatta, M. & Zeppenfeld, S., 2023: Atmospheric and Surface Processes, and Feedback Mechanisms Determining Arctic Amplification: A Review of First Results and Prospects of the (AC)³ Project, Bull. Am. Meteorol. Soc., American Meteorological Society, 104, E208–E242, https://doi.org/10.1175/bams-d-21-0218.1
Linke, O., Quaas, J., Baumer, F., Becker, S., Chylik, J., Dahlke, S., Ehrlich, A., Handorf, D., Jacobi, C., Kalesse-Los, H., Lelli, L., Mehrdad, S., Neggers, R. A. J., Riebold, J., Saavedra Garfias, P., Schnierstein, N., Shupe, M. D., Smith, C., Spreen, G., Verneuil, B., Vinjamuri, K. S., Vountas, M., and Wendisch, M., 2023: Constraints on simulated past Arctic amplification and lapse rate feedback from observations, Atmos. Chem. Phys., 23, 9963–9992, https://doi.org/10.5194/acp-23-9963-2023.
M. Lonardi, C. Pilz, E. F. Akansu, S. Dahlke, U. Egerer, A. Ehrlich, H. Griesche, A. J. Heymsfield, B. Kirbus, C. G. Schmitt, M. D. Shupe, H. Siebert, B. Wehner, M. Wendisch, 2022; Tethered balloon-borne profile measurements of atmospheric properties in the cloudy atmospheric boundary layer over the Arctic sea ice during MOSAiC: Overview and first results. Elementa: Science of the Anthropocene; 10 (1): 000120. doi: https://doi.org/10.1525/elementa.2021.000120
Shupe, M.D., M. Rex, B. Blomquist, P.O.G. Persson, J. Schmale, T. Uttal, D. Althausen, H. Angot, S. Archer, L. Bariteau, I. Beck, J. Bilberry, S. Bussi, C. Buck, M. Boyer, Z. Brasseur, I.M. Brooks, R. Calmer, J. Cassano, V. Castro, D. Chu, D. Costa, C.J. Cox, J. Creamean, S. Crewell, S. Dahlke, E. Damm, G. de Boer, H. Deckelmann, K. Dethloff, M. Dütsch, K. Ebell, A. Ehrlich, J. Ellis, R. Engelmann, A.A. Fong, M.M. Frey, M.R. Gallagher, L. Ganzeveld, R. Gradinger, J. Graeser, V. Greenamyer, H. Griesche, S. Griffiths, J. Hamilton, G. Heinemann, D. Helmig, A. Herber, C. Heuzé, J. Hofer, T. Houchens, D. Howard, J. Inoue, H.-W. Jacobi, R. Jaiser, T. Jokinen, O. Jourdan, G. Jozef, W. King, A. Kirchgaessner, M. Klingebiel, M. Krassovski, T. Krumpen, A. Lampert, W. Landing, T. Laurila, D. Lawrence, B. Loose, M. Lonardi, C. Lüpkes, M. Maahn, A. Macke, W. Maslowski, C. Marsay, M. Maturilli, M. Mech, S. Morris, M. Moser, M. Nicolaus, P. Ortega, J. Osborn, F. Pätzold, D.K. Perovich, T. Petäjä, C. Pilz, R. Pirazzini, K. Posman, H. Powers, K.A. Pratt, A. Preußer, L. Quéléver, M. Radenz, B. Rabe, A. Rinke, T. Sachs, A. Schulz, H. Siebert, T. Silva, A. Solomon, A. Sommerfeld, G. Spreen, M. Stephens, A. Stohl, G. Svensson, J. Uin, J. Viegas, C. Voigt, P. von der Gathen, B. Wehner, J.M. Welker, M. Wendisch, M. Werner, Z. Xie, F. Yue, 2022: Overview of the MOSAiC expedition – Atmosphere. Elementa: Science of the Anthropocene, 10 (1): 00060, https://doi.org/10.1525/elementa.2021.00060.
Rabe, B., Heuzé, C.,Regnery, J., Aksenov, Y., Allerholt, J., Athanase, M., Bai, Y., Bauch, D., Basque, C., Baumann, T. M. Chen, D., Cole, S. T., Craw, L., Davies, A., Damm, E., Dethloff, K., Divine, D. V. Doglioni, F., Ebert, F., Fang, Y.-C., Fer, I., Fong, A. A., Gradinger, R., Granskog, M. A., Graupner, R., Haas, C., He, H., He, Y., Hoppmann, M., Janout, M., Kadko, D., Kanzow, T., Karam, S., Kawaguchi, Y., Koenig, Z., Kong, B., Krishfield, R. A., Krumpen, T., Kuhlmey, D., Kuznetsov, I., Lan, M., Lei, R., Li, T., Torres-Valdés, S., Lin, L., Lin, L., Liu, H., Liu, N., Loose, B., Ma, X., MacKay, R., Mallet, M., Mallett, R. D. C., Maslowski, W., Mertens, C., Mohrholz, V., Muilwijk, M., Nicolaus, M., O’Brien, J. K., Perovich, D., Ren, J., Rex, M., Ribeiro, N., Rinke, A., Schaffer, J., Schuffenhauer, I., Schulz, K., Shupe, M. D., Shaw, W., Sokolov, V., Sommerfeld, A., Spreen, G., Stanton, T., Stephens, M., Su, J., Sukhikh, N., Sundfjord, A., Thomisch, K., Tippenhauer, S., Toole, J. M., Vredenborg, M., Walter, M., Wang, H., Wang, L., Wang, Y., Wendisch, M., Zhao, J., Zhou, M., Zhu, J., 2022: Overview of the MOSAiC expedition – Physical oceanography. Elementa: Science of the Anthropocene, 10 (1): 00062, https://doi.org/10.1525/elementa.2021.00062.
Nixdorf, Uwe, Dethloff, Klaus, Rex, Markus, Shupe, Matthew, Sommerfeld, Anja, Perovich, Donald K., Nicolaus, Marcel, Heuzé, Céline, Rabe, Benjamin, Loose, Brice, Damm, Ellen, Gradinger, Rolf, Fong, Allison, Maslowski, Wieslaw, Rinke, Annette, Kwok, Ronald, Spreen, Gunnar, Wendisch, Manfred, Herber, Andreas, Boetius, Antje. (2021). MOSAiC Extended Acknowledgement. Zenodo. https://doi.org/10.5281/zenodo.5541624
Nicolaus, M, Perovich, DK, Spreen, G, Granskog, MA, Albedyll, LV, Angelopoulos, M, Anhaus, P, Arndt, S, Belter, HJ, Bessonov, V, Birnbaum, G, Brauchle, J, Calmer, R, Cardellach, E, Cheng, B, Clemens-Sewall, D, Dadic, R, Damm, E, de Boer, G, Demir, O, Dethloff, K, Divine, DV, Fong, AA, Fons, S, Frey, MM, Fuchs, N, Gabarro´, C, Gerland, S, Goessling, HF, Gradinger, R, Haapala, J, Haas, C, Hamilton, J, Hannula, H-R, Hendricks, S, Herber, A, Heuze´ , C, Hoppmann, M, Høyland, KV, Huntemann, M, Hutchings, JK, Hwang, B, Itkin, P, Jacobi, H-W, Jaggi, M, Jutila, A, Kaleschke, L, Katlein, C, Kolabutin, N, Krampe, D, Kristensen, SS, Krumpen, T, Kurtz, N, Lampert, A, Lange, BA, Lei, R, Light, B, Linhardt, F, Liston, GE, Loose, B, Macfarlane, AR, Mahmud, M, Matero, IO, Maus, S, Morgenstern, A, Naderpour, R, Nandan,V, Niubom, A, Oggier, M, Oppelt, N, Pätzold, F, Perron, C, Petrovsky,T, Pirazzini, R, Polashenski, C, Rabe, B, Raphael, IA, Regnery, J, Rex, M, Ricker, R, Riemann-Campe, K, Rinke, A, Rohde, J, Salganik, E, Scharien, RK, Schiller, M, Schneebeli, M, Semmling, M, Shimanchuk, E, Shupe, MD, Smith, MM, Smolyanitsky,V, Sokolov,V, Stanton, T, Stroeve, J,Thielke, L,Timofeeva, A,Tonboe, RT,Tavri, A,Tsamados, M,Wagner, DN,Watkins, D,Webster, M,Wendisch, M. 2021. Overview of the MOSAiC expedition: Snow and sea ice. Elementa: Science of the Anthropocene 9(1). DOI: https://doi.org/10.1525/elementa.2021.000046
Maahn, M., Goren, T., Shupe, M. D., and de Boer, G., 2021. Liquid containing clouds at the North Slope of Alaska demonstrate sensitivity to local industrial aerosol emissions. Geophys. Res. Lett., 48, e2021GL094307. https://doi.org/10.1029/2021GL094307
Gierens, R., S. Kneifel, M.D. Shupe, K. Ebell, M. Maturilli, and U. Löhnert, 2020: Low-level mixed-phase clouds in a complex Arctic environment, Atmos. Chem. Phys., 20, 3459-3481, doi:10.5194/acp-20-3459-2020
Wendisch, M., A. Macke, A. Ehrlich, C. Lüpkes, M. Mech, D. Chechin, K. Dethloff, C. Barrientos, H. Bozem, M. Brückner, H.-C. Clemen, S. Crewell, T. Donth, R. Dupuy, C. Dusny, K. Ebell, U. Egerer, R. Engelmann, C. Engler, O. Eppers, M. Gehrmann, X. Gong, M. Gottschalk, C. Gourbeyre, H. Griesche, J. Hartmann, M. Hartmann, B. Heinold, A. Herber, H. Herrmann, G. Heygster, P. Hoor, S. Jafariserajehlou, E. Jäkel, E. Järvinen, O. Jourdan, U. Kästner, S. Kecorius, E.M. Knudsen, F. Köllner, J. Kretzschmar, L. Lelli, D. Leroy, M. Maturilli, L. Mei, S. Mertes, G. Mioche, R. Neuber, M. Nicolaus, T. Nomokonova, J. Notholt, M. Palm, M. van Pinxteren, J. Quaas, P. Richter, E. Ruiz-Donoso, M. Schäfer, K. Schmieder, M. Schnaiter, J. Schneider, A. Schwarzenböck, P. Seifert, M.D. Shupe, H. Siebert, G. Spreen, J. Stapf, F. Stratmann, T. Vogl, A. Welti, H. Wex, A. Wiedensohler, M. Zanatta, S. Zeppenfeld, 2019: The Arctic Cloud Puzzle: Using ACLOUD/PASCAL Multi-Platform Observations to Unravel the Role of Clouds and Aerosol Particles in Arctic Amplification, Bull. Amer. Meteor. Soc., 100 (5), 841–871, doi:10.1175/BAMS-D-18-0072.1
Pithan, F., G. Svensson, R. Caballero, D. Chechin, T.W. Cronin, A.M.L. Ekman, R. Neggers, M.D. Shupe, A. Solomon, M. Tjernström, and M. Wendisch, 2018: Role of air-mass transformations in exchange between the Arctic and mid-latitudes, Nature Geoscience, doi:10.1038/s41561-018-0234-1
Prof. Dr. Harald Sodemann (University of Bergen, Norway)
Phase III
Harald Sodemann contributes to (AC)³ with his expertise in Arctic air mass transport and transformation using stable water isotope. During HALO–(AC)³, he was involved in coordinating several research flights between the ISLAS 2022 aircraft campaign led by Harald Sodemann, the ACAO aircraft campaign, and HALO–(AC)³. As part of the Mercator Fellowship, Harald Sodemann will contribute to exploit the unique synergy between the five research aircraft deployed in the European Arctic during Spring 2022. As lead of the ERC CoG project ISLAS, Harald Sodemann will contribute with insight on different stages of the water cycle within high-latitude weather systems. Specific projects Harald Sodemann will closely collaborate with are: A02, B03, B05, D01, D02, E05, E06, and activities in the Cluster E. Harald Sodemann will spend at least six months in Germany. In 2024, Harald Sodemann will stay for a sabbatical at University of Mainz. During this time, he will also perform extended visits to (AC)³ partner institutes in Bremen, Köln, and Leipzig, and attend relevant (AC)³ meetings and activities.
Wendisch, M., Crewell, S., Ehrlich, A., Herber, A., Kirbus, B., Lüpkes, C., Mech, M., Abel, S. J., Akansu, E. F., Ament, F., Aubry, C., Becker, S., Borrmann, S., Bozem, H., Brückner, M., Clemen, H.-C., Dahlke, S., Dekoutsidis, G., Delanoë, J., De La Torre Castro, E., Dorff, H., Dupuy, R., Eppers, O., Ewald, F., George, G., Gorodetskaya, I. V., Grawe, S., Groß, S., Hartmann, J., Henning, S., Hirsch, L., Jäkel, E., Joppe, P., Jourdan, O., Jurányi, Z., Karalis, M., Kellermann, M., Klingebiel, M., Lonardi, M., Lucke, J., Luebke, A. E., Maahn, M., Maherndl, N., Maturilli, M., Mayer, B., Mayer, J., Mertes, S., Michaelis, J., Michalkov, M., Mioche, G., Moser, M., Müller, H., Neggers, R., Ori, D., Paul, D., Paulus, F. M., Pilz, C., Pithan, F., Pöhlker, M., Pörtge, V., Ringel, M., Risse, N., Roberts, G. C., Rosenburg, S., Röttenbacher, J., Rückert, J., Schäfer, M., Schaefer, J., Schemann, V., Schirmacher, I., Schmidt, J., Schmidt, S., Schneider, J., Schnitt, S., Schwarz, A., Siebert, H., Sodemann, H., Sperzel, T., Spreen, G., Stevens, B., Stratmann, F., Svensson, G., Tatzelt, C., Tuch, T., Vihma, T., Voigt, C., Volkmer, L., Walbröl, A., Weber, A., Wehner, B., Wetzel, B., Wirth, M., and Zinner, T., 2024: Overview: quasi-Lagrangian observations of Arctic air mass transformations – introduction and initial results of the HALO-(AC)³ aircraft campaign, Atmos. Chem. Phys., 24, 8865–8892, https://doi.org/10.5194/acp-24-8865-2024.
Dr. Judah Cohen (Atmospheric and Environmental Research (AER), Massachusetts Institute of Technology (MIT), USA):
Phase III
Judah Cohen contributes to (AC)³ with his worldwide recognized expertise on Arctic-midlatitude linkages, large-scale atmospheric dynamics, and troposphere-stratosphere coupling. He has a long-standing track record in this field, having authored numerous highly cited papers, including review papers for Nature Geoscience and Nature Climate Change on Arctic Amplification and its impacts on midlatitude weather, with several (AC)³ members as co-authors and helped organize a Nature collection on the subject. Dr. Cohen’s expertise and extensive research network are evidenced by his various international collaborations, including several research stays at AWI in Germany, as an invited speaker during the (AC)³ General Assembly in May 2022, and as co-chair of the CLIVAR working group on Arctic-midlatitude linkages. During phase III of (AC)³ he will serve as a Mercator Fellow and collaborate closely with D01 and D06. He will support the research to identify relevant recent trends in temperatures from the surface through the upper stratosphere and in the Northern Hemispheric atmospheric circulation in both the observations and the models with an emphasis on the Arctic sector. In addition, Cohen will contribute to identify model biases in simulating Arctic-midlatitude interactions, with a focus on the role of Arctic sea ice loss in modulating the onset, timing, and persistence of highlatitude blocking and its related impacts on midlatitude weather extremes. Furthermore, Dr. Cohen will assist in analyzing the tropospheric response to stratospheric variability and how Arctic amplification may be modulating the tropospheric response and the impact on hemispheric weather with an emphasis on Europe to polar vortex disruptions across the Northern Hemisphere in both observations and in the models. This will particularly include work on different forms of troposphere-stratosphere-troposphere coupling such as wave reflection and wave absorption. Dr. Cohen will also collaborate and exchange knowledge with other (AC)³ projects such as D03, D04, and E04. Additionally, Cohen will teach at the (AC)³ winter school in 2025 and report and advise on his experience with outreach activities through his research blog and engagement on Twitter. He will host (AC)³ PhDs at AER and/or MIT (both in Massachusetts) as part of his efforts to promote international collaboration and knowledge exchange.
J. Cohen, X. Zhang, J. Francis, T. Jung, R. Kwok, J. Overland, T. Ballinger, U.S. Bhatt, H. W. Chen, D. Coumou, S. Feldstein, D. Handorf, G. Henderson, M. Ionita, M. Kretschmer, F. Laliberte, S. Lee, H. W. Linderholm, W. Maslowski, Y. Peings, K. Pfeiffer, I. Rigor, T. Semmler, J. Stroeve, P.C. Taylor, S. Vavrus, T. Vihma, S. Wang, M. Wendisch, Y. Wu, J. Yoon, 2020: Divergent consensuses on Arctic amplification influence on midlatitude severe winter weather. Nat. Clim. Chang. 10, 20–29, doi:10.1038/s41558-019-0662-y. https://www.nature.com/articles/s41558-019-0662-y
Romanowsky, E., D. Handorf, M. Rex, R. Jaiser, I. Wohltmann, W. Dorn, J. Ukita, J. Cohen, and K. Dethloff, 2019: The role of stratospheric ozone for Arctic-midlatitude linkages, Nature Scientific Reports, 9, Article 7962, doi:10.1038/s41598-019-43823-1
Prof. Dr. Claire Pettersen (University of Michigan, USA):
Phase III
Claire Pettersen contributes to (AC)³ with her expertise in ground-based, airborne, and space-borne observations of clouds and precipitation, high-latitude cloud and precipitation processes, snowfall characteristics as well as in field deployments of instruments and retrieval development. For example, she is a science PI on the NSF supported ICECAPS-MELT project and has been involved with the ICECAPS project and the observations at Summit Station, Greenland, since 2012. As part of the Mercator Fellowship, Claire Pettersen will contribute to understand the role of large-scale circulation patterns, e.g., blocking situations, on Arctic precipitation and cloud characteristics. A particular focus will also be the role of water vapor transport, e.g., atmospheric rivers, and air mass transformation processes during CAOs and WAIs. By exploiting satellite, ground-based remote sensing, in-situ and modeling data, Claire Pettersen is closely connected to several (AC)³ projects, both in terms of methods and in terms of the common scientific topics mentioned above. She will particularly collaborate with B03, B05, E02, E04, E05, E06 and also contribute to CCA4 “Air Mass Transport and Transformation”. Claire Pettersen will spend at least two times two months in Germany: she will stay at the UNI–K in early summer 2025 and 2026, respectively. During this time, an extensive collaboration with the goal of common publications is foreseen. To this end, she will also visit the (AC)³ partner institutes in Potsdam and Leipzig, and will also participate in relevant (AC)³ meetings and activities.
King, F., Duffy, G., Milani, L., Fletcher, C. G., Pettersen, C., and Ebell, K., 2022: DeepPrecip: a deep neural network for precipitation retrievals, Atmos. Meas. Tech., 15, 6035–6050, https://doi.org/10.5194/amt-15-6035-2022.
Dr. Irina Gorodedskaya (Universidade de Aveiro, Portugal)
Phase II
The major science objective of Irina Gorodetskaya in the framework of the Mercator Fellowship is to study the role of atmospheric rivers in the Arctic surface energy budget. Furthermore, she will investigate atmospheric and hydrological components (moisture, clouds, precipitation) in the context of the present and future Arctic amplification. Irina Gorodetskaya intends to participate in the HALO–(AC)³ aircraft campaign. Specific science themes for this fellowship with direct links to (AC)³ projects include:
- Mechanisms of the poleward moisture transport: extratropical cyclones, warm/moist air intrusions and atmospheric rivers (D01, B05, D03, E01, E02, E04)
- Lagrangian study of the atmospheric rivers linking subtropical moisture sources and Arctic precipitation (D01, E01, E03, E04)
- Cloud and precipitation microphysical processes associated with the atmospheric rivers, including the role of the long-distance transport of aerosol compared to the local sources (D02, E04, E01, E03)
- Representation of anomalous moisture transport events and associated precipitation in high–resolution models (D02, E01, E02, E04, B05)
- Changes in the sea ice (concentration, thickness, albedo) related to the atmospheric river events and warm/moist air intrusions and associated feedbacks (e.g., enhanced local evaporation) (D03, E04)
Walbröl, A., Michaelis, J., Becker, S., Dorff, H., Gorodetskaya, I., Kirbus, B., Lauer, M., Maherndl, N., Maturilli, M., Mayer, J., Müller, H., Neggers, R. A. J., Paulus, F. M., Röttenbacher, J., Rückert, J. E., Schirmacher, I., Slättberg, N., Ehrlich, A., Wendisch, M., and Crewell, S., 2024: Contrasting extremely warm and long-lasting cold air anomalies in the North Atlantic sector of the Arctic during the HALO–(AC)³ campaign, Atm. Chem. Phys., https://doi.org/10.5194/acp-24-8007-2024.
Viceto, C., 2024: Assessing the role of atmospheric rivers in Arctic precipitation and temperature in present and future climate, Dissertation, Universidade de Aveiro, hdl.handle.net/10773/42316
Lauer, M., Rinke, A., Gorodetskaya, I., Sprenger, M., Mech, M., and Crewell, S., 2023: Influence of atmospheric rivers and associated weather systems on precipitation in the Arctic, Atmos. Chem. Phys., 23, 8705–8726, https://doi.org/10.5194/acp-23-8705-2023.
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