Articles | Volume 3, issue 2
https://doi.org/10.5194/wcd-3-575-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wcd-3-575-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 May 2022
Research article |
| 18 May 2022
| 18 May 2022
Characterising the interaction of tropical and extratropical air masses controlling East Asian summer monsoon progression using a novel frontal detection approach
Department of Meteorology, University of Reading, Reading, RG6 6ET, UK
National Centre for Atmospheric Science, University of Reading, Reading, RG6 6ET, UK
Andrew G. Turner
Department of Meteorology, University of Reading, Reading, RG6 6ET, UK
National Centre for Atmospheric Science, University of Reading, Reading, RG6 6ET, UK
Reinhard Schiemann
Department of Meteorology, University of Reading, Reading, RG6 6ET, UK
National Centre for Atmospheric Science, University of Reading, Reading, RG6 6ET, UK
Pier Luigi Vidale
Department of Meteorology, University of Reading, Reading, RG6 6ET, UK
National Centre for Atmospheric Science, University of Reading, Reading, RG6 6ET, UK
Nicholas P. Klingaman
Department of Meteorology, University of Reading, Reading, RG6 6ET, UK
National Centre for Atmospheric Science, University of Reading, Reading, RG6 6ET, UK
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Mark R. Muetzelfeldt, Reinhard Schiemann, Andrew G. Turner, Nicholas P. Klingaman, Pier Luigi Vidale, and Malcolm J. Roberts
Hydrol. Earth Syst. Sci., 25, 6381–6405, https://doi.org/10.5194/hess-25-6381-2021, https://doi.org/10.5194/hess-25-6381-2021, 2021
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Simulating East Asian Summer Monsoon (EASM) rainfall poses many challenges because of its multi-scale nature. We evaluate three setups of a 14 km global climate model against observations to see if they improve simulated rainfall. We do this over catchment basins of different sizes to estimate how model performance depends on spatial scale. Using explicit convection improves rainfall diurnal cycle, yet more model tuning is needed to improve mean and intensity biases in simulated summer rainfall.
Gabriel M. P. Perez, Pier Luigi Vidale, Nicholas P. Klingaman, and Thomas C. M. Martin
Weather Clim. Dynam., 2, 475–488, https://doi.org/10.5194/wcd-2-475-2021, https://doi.org/10.5194/wcd-2-475-2021, 2021
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Anna B. Harper, Karina E. Williams, Patrick C. McGuire, Maria Carolina Duran Rojas, Debbie Hemming, Anne Verhoef, Chris Huntingford, Lucy Rowland, Toby Marthews, Cleiton Breder Eller, Camilla Mathison, Rodolfo L. B. Nobrega, Nicola Gedney, Pier Luigi Vidale, Fred Otu-Larbi, Divya Pandey, Sebastien Garrigues, Azin Wright, Darren Slevin, Martin G. De Kauwe, Eleanor Blyth, Jonas Ardö, Andrew Black, Damien Bonal, Nina Buchmann, Benoit Burban, Kathrin Fuchs, Agnès de Grandcourt, Ivan Mammarella, Lutz Merbold, Leonardo Montagnani, Yann Nouvellon, Natalia Restrepo-Coupe, and Georg Wohlfahrt
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We evaluated 10 representations of soil moisture stress in the JULES land surface model against site observations of GPP and latent heat flux. Increasing the soil depth and plant access to deep soil moisture improved many aspects of the simulations, and we recommend these settings in future work using JULES. In addition, using soil matric potential presents the opportunity to include parameters specific to plant functional type to further improve modeled fluxes.
Sazzad Hossain, Hannah L. Cloke, Andrea Ficchì, Andrew G. Turner, and Elisabeth M. Stephens
Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2021-97, https://doi.org/10.5194/hess-2021-97, 2021
Manuscript not accepted for further review
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Hydrometeorological drivers are investigated to study three different flood types: long duration, rapid rise and high water level of the Brahmaputra river basin in Bangladesh. Our results reveal that long duration floods have been driven by basin-wide rainfall whereas rapid rate of rise due to more localized rainfall. We find that recent record high water levels are not coincident with extreme river flows. Understanding these drivers is key for flood forecasting and early warning.
Jonathan K. P. Shonk, Andrew G. Turner, Amulya Chevuturi, Laura J. Wilcox, Andrea J. Dittus, and Ed Hawkins
Atmos. Chem. Phys., 20, 14903–14915, https://doi.org/10.5194/acp-20-14903-2020, https://doi.org/10.5194/acp-20-14903-2020, 2020
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We use a set of model simulations of the 20th century to demonstrate that the uncertainty in the cooling effect of man-made aerosol emissions has a wide range of impacts on global monsoons. For the weakest cooling, the impact of aerosol is overpowered by greenhouse gas (GHG) warming and monsoon rainfall increases in the late 20th century. For the strongest cooling, aerosol impact dominates over GHG warming, leading to reduced monsoon rainfall, particularly from 1950 to 1980.
Liang Guo, Ruud J. van der Ent, Nicholas P. Klingaman, Marie-Estelle Demory, Pier Luigi Vidale, Andrew G. Turner, Claudia C. Stephan, and Amulya Chevuturi
Geosci. Model Dev., 13, 6011–6028, https://doi.org/10.5194/gmd-13-6011-2020, https://doi.org/10.5194/gmd-13-6011-2020, 2020
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Precipitation over East Asia simulated in the Met Office Unified Model is compared with observations. Moisture sources of EA precipitation are traced using a moisture tracking model. Biases in moisture sources are linked to biases in precipitation. Using the tracking model, changes in moisture sources can be attributed to changes in SST, circulation and associated evaporation. This proves that the method used in this study is useful to identify the causes of biases in regional precipitation.
Laura J. Wilcox, Zhen Liu, Bjørn H. Samset, Ed Hawkins, Marianne T. Lund, Kalle Nordling, Sabine Undorf, Massimo Bollasina, Annica M. L. Ekman, Srinath Krishnan, Joonas Merikanto, and Andrew G. Turner
Atmos. Chem. Phys., 20, 11955–11977, https://doi.org/10.5194/acp-20-11955-2020, https://doi.org/10.5194/acp-20-11955-2020, 2020
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Projected changes in man-made aerosol range from large reductions to moderate increases in emissions until 2050. Rapid reductions between the present and the 2050s lead to enhanced increases in global and Asian summer monsoon precipitation relative to scenarios with continued increases in aerosol. Relative magnitude and spatial distribution of aerosol changes are particularly important for South Asian summer monsoon precipitation changes, affecting the sign of the trend in the coming decades.
Giorgia Di Capua, Jakob Runge, Reik V. Donner, Bart van den Hurk, Andrew G. Turner, Ramesh Vellore, Raghavan Krishnan, and Dim Coumou
Weather Clim. Dynam., 1, 519–539, https://doi.org/10.5194/wcd-1-519-2020, https://doi.org/10.5194/wcd-1-519-2020, 2020
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We study the interactions between the tropical convective activity and the mid-latitude circulation in the Northern Hemisphere during boreal summer. We identify two circumglobal wave patterns with phase shifts corresponding to the South Asian and the western North Pacific monsoon systems at an intra-seasonal timescale. These patterns show two-way interactions in a causal framework at a weekly timescale and assess how El Niño affects these interactions.
Paul-Arthur Monerie, Amulya Chevuturi, Peter Cook, Nicholas P. Klingaman, and Christopher E. Holloway
Geosci. Model Dev., 13, 4749–4771, https://doi.org/10.5194/gmd-13-4749-2020, https://doi.org/10.5194/gmd-13-4749-2020, 2020
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In this study, we assess how increasing the horizontal resolution of HadGEM3-GC31 can allow simulating better tropical and subtropical South American precipitation. We compare simulations of HadGEM3-GC3.1, performed at three different horizontal resolutions. We show that increasing resolution allows decreasing precipitation biases over the Andes and northeast Brazil and improves the simulation of daily precipitation distribution.
Cited articles
Adler, R. F., Sapiano, M. R. P., Huffman, G. J., Wang, J.-J., Gu, G., Bolvin, D., Chiu, L., Schneider, U., Becker, A., Nelkin, E., Xie, P., Ferraro, R., and Shin, D.-B.: The Global Precipitation Climatology Project (GPCP) Monthly Analysis (New Version 2.3) and a Review of 2017 Global Precipitation, Atmosphere, 9, 138, https://doi.org/10.3390/atmos9040138, 2018. a
Berry, G., Jakob, C., and Reeder, M.: Recent global trends in atmospheric fronts, Geophys. Res. Lett., 38, L21812, https://doi.org/10.1029/2011GL049481, 2011a. a
Berry, G., Reeder, M. J., and Jakob, C.: A global climatology of atmospheric fronts, Geophys. Res. Lett., 38, L04809, https://doi.org/10.1029/2010GL046451, 2011b. a
Catto, J. L. and Raveh-Rubin, S.: Climatology and dynamics of the link between dry intrusions and cold fronts during winter. Part I: global climatology, Clim. Dynam., 53, 1873–1892, https://doi.org/10.1007/s00382-019-04745-w, 2019. a
Chen, G. T.-J., Wang, C.-C., and Liu, S. C.-S.: Potential Vorticity Diagnostics of a Mei-Yu Front Case, Mon. Weather Rev., 131, 2680–2696, https://doi.org/10.1175/1520-0493(2003)131<2680:PVDOAM>2.0.CO;2, 2003. a, b
Chen, J. and Bordoni, S.: Orographic Effects of the Tibetan Plateau on the East Asian Summer Monsoon: An Energetic Perspective, J. Climate, 27, 3052–3072, https://doi.org/10.1175/JCLI-D-13-00479.1, 2014. a, b
Chiang, J. C. H., Kong, W., Wu, C. H., and Battisti, D. S.: Origins of East Asian Summer Monsoon Seasonality, J. Climate, 33, 7945–7965, https://doi.org/10.1175/JCLI-D-19-0888.1, 2020. a, b, c
Dacre, H. F., Clark, P. A., Martinez-Alvarado, O., Stringer, M. A., and Lavers, D. A.: How Do Atmospheric Rivers Form?, B. Am. Meteorol. Soc., 96, 1243–1255, https://doi.org/10.1175/BAMS-D-14-00031.1, 2015. a
Dai, L., Cheng, T. F., and Lu, M.: Define East Asian Monsoon Annual Cycle via a Self-Organizing Map-Based Approach, Geophys. Res. Lett., 48, e2020GL089542, https://doi.org/10.1029/2020GL089542, 2021. a, b
Day, J. A., Fung, I., and Liu, W.: Changing character of rainfall in eastern China, 1951–2007, P. Natl. Acad. Sci. USA, 115, 2016–2021, https://doi.org/10.1073/pnas.1715386115, 2018. a, b
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A. P., Monge-Sanz, B. M., Morcrette, J.-J., Park, B.-K., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J.-N., and Vitart, F.: The ERA-Interim reanalysis: configuration and performance of the data assimilation system, Q. J. Roy. Meteor. Soc., 137, 553–597, https://doi.org/10.1002/qj.828, 2011. a
Hart, N. C. G., Gray, S. L., and Clark, P. A.: Sting-Jet Windstorms over the North Atlantic: Climatology and Contribution to Extreme Wind Risk, J. Climate, 30, 5455–5471, https://doi.org/10.1175/JCLI-D-16-0791.1, 2017. a
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. a
Hewson, T. D.: Objective fronts, Meteorol. Appl., 5, 37–65, https://doi.org/10.1017/S1350482798000553, 1998. a, b
Hong, X. and Lu, R.: The Meridional Displacement of the Summer Asian Jet, Silk Road Pattern, and Tropical SST Anomalies, J. Climate, 29, 3753–3766, https://doi.org/10.1175/JCLI-D-15-0541.1, 2016. a
Hong, X., Lu, R., and Li, S.: Asymmetric Relationship between the Meridional Displacement of the Asian Westerly Jet and the Silk Road Pattern, Adv. Atmos. Sci., 35, 389–396, https://doi.org/10.1007/s00376-017-6320-2, 2018. a
Hsu, H.-H. and Lin, S.-M.: Asymmetry of the Tripole Rainfall Pattern during the East Asian Summer, J. Climate, 20, 4443–4458, https://doi.org/10.1175/JCLI4246.1, 2007. a, b
Jiao, D., Xu, N., Yang, F., and Xu, K.: Evaluation of spatial-temporal variation performance of ERA5 precipitation data in China, Sci. Rep.-UK, 11, 17956, https://doi.org/10.1038/s41598-021-97432-y, 2021. a
Li, C. and Yanai, M.: The Onset and Interannual Variability of the Asian Summer Monsoon in Relation to Land–Sea Thermal Contrast, J. Climate, 9, 358–375, https://doi.org/10.1175/1520-0442(1996)009<0358:TOAIVO>2.0.CO;2, 1996. a
Li, Y., Deng, Y., Yang, S., and Zhang, H.: Multi-scale temporospatial variability of the East Asian Meiyu-Baiu fronts: characterization with a suite of new objective indices, Clim. Dynam., 51, 1659–1670, https://doi.org/10.1007/s00382-017-3975-4, 2018. a, b, c, d
Li, Y., Deng, Y., Yang, S., Zhang, H., Ming, Y., and Shen, Z.: Multi-scale temporal-spatial variability of the East Asian summer monsoon frontal system: observation versus its representation in the GFDL HiRAM, Clim. Dynam., 52, 6787–6798, https://doi.org/10.1007/s00382-018-4546-z, 2019. a, b, c, d
Liang, J. and Yong, Y.: Climatology of atmospheric rivers in the Asian monsoon region, Int. J. Climatol., 41, E801–E818, https://doi.org/10.1002/joc.6729, 2020. a
Lu, R.-Y., Oh, J.-H., and Kim, B.-J.: A teleconnection pattern in upper-level meridional wind over the North African and Eurasian continent in summer, Tellus A, 54, 44–55, https://doi.org/10.1034/j.1600-0870.2002.00248.x, 2002. a
Molnar, P., Boos, W. R., and Battisti, D. S.: Orographic Controls on Climate and Paleoclimate of Asia: Thermal and Mechanical Roles for the Tibetan Plateau, Annu. Rev. Earth Pl. Sc., 38, 77–102, https://doi.org/10.1146/annurev-earth-040809-152456, 2010. a
Nitta, T.: Long-Term Variations of Cloud Amount in the Western Pacific Region, J. Meteorol. Soc. Jpn. Ser. II, 64, 373–390, https://doi.org/10.2151/jmsj1965.64.3_373, 1986. a
Nogueira, M.: Inter-comparison of ERA-5, ERA-interim and GPCP rainfall over the last 40 years: Process-based analysis of systematic and random differences, J. Hydrol., 583, 124632, https://doi.org/10.1016/j.jhydrol.2020.124632, 2020. a
Parker, D. J., Willetts, P., Birch, C., Turner, A. G., Marsham, J. H., Taylor, C. M., Kolusu, S., and Martin, G. M.: The interaction of moist convection and mid-level dry air in the advance of the onset of the Indian monsoon, Q. J. Roy. Meteor. Soc., 142, 2256–2272, https://doi.org/10.1002/qj.2815, 2016. a, b, c, d, e
Rodwell, M. J. and Hoskins, B. J.: Subtropical Anticyclones and Summer Monsoons, J. Climate, 14, 3192–3211, https://doi.org/10.1175/1520-0442(2001)014<3192:SAASM>2.0.CO;2, 2001. a
Rutz, J. J., Steenburgh, W. J., and Ralph, F. M.: Climatological Characteristics of Atmospheric Rivers and Their Inland Penetration over the Western United States, Mon. Weather Rev., 142, 905–921, https://doi.org/10.1175/MWR-D-13-00168.1, 2014. a
Sampe, T. and Xie, S.-P.: Large-Scale Dynamics of the Meiyu-Baiu Rainband: Environmental Forcing by the Westerly Jet*, J. Climate, 23, 113–134, https://doi.org/10.1175/2009JCLI3128.1, 2010. a, b
Sanders, F. and Hoffman, E. G.: A Climatology of Surface Baroclinic Zones, Weather Forecast., 17, 774–782, https://doi.org/10.1175/1520-0434(2002)017<0774:ACOSBZ>2.0.CO;2, 2002. a
Schemm, S., Rudeva, I., and Simmonds, I.: Extratropical fronts in the lower troposphere–global perspectives obtained from two automated methods, Q. J. Roy. Meteor. Soc., 141, 1686–1698, https://doi.org/10.1002/qj.2471, 2015. a, b, c
Schemm, S., Sprenger, M., and Wernli, H.: When during Their Life Cycle Are Extratropical Cyclones Attended by Fronts?, B. Am. Meteorol. Soc., 99, 149–165, https://doi.org/10.1175/BAMS-D-16-0261.1, 2018. a, b
Schiemann, R., Lüthi, D., and Schär, C.: Seasonality and Interannual Variability of the Westerly Jet in the Tibetan Plateau Region, J. Climate, 22, 2940–2957, https://doi.org/10.1175/2008JCLI2625.1, 2009. a
Spensberger, C. and Sprenger, M.: Beyond cold and warm: an objective classification for maritime midlatitude fronts, Q. J. Roy. Meteor. Soc., 144, 261–277, https://doi.org/10.1002/qj.3199, 2018. a, b
Sprenger, M. and Wernli, H.: The LAGRANTO Lagrangian analysis tool – version 2.0, Geosci. Model Dev., 8, 2569–2586, https://doi.org/10.5194/gmd-8-2569-2015, 2015. a
Terpstra, A., Gorodetskaya, I. V., and Sodemann, H.: Linking sub-tropical evaporation and extreme precipitation over East Antarctica: an atmospheric river case study, J. Geophys. Res.-Atmos., 126, e2020JD033617. https://doi.org/10.1029/2020JD033617, 2021. a
Thomas, C. M. and Schultz, D. M.: What are the Best Thermodynamic Quantity and Function to Define a Front in Gridded Model Output?, B. Am. Meteorol. Soc., 100, 873–895, https://doi.org/10.1175/BAMS-D-18-0137.1, 2019b. a, b, c
Tomita, T., Yamaura, T., and Hashimoto, T.: Interannual Variability of the Baiu Season near Japan Evaluated from the Equivalent Potential Temperature, J. Meteorol. Soc. Jpn. Ser. II, 89, 517–537, https://doi.org/10.2151/jmsj.2011-507, 2011. a, b
Volonté, A., Turner, A., and Menon, A.: Airmass analysis of the processes driving the progression of the Indian summer monsoon, Q. J. Roy. Meteor. Soc., 146, 2949–2980, https://doi.org/10.1002/qj.3700, 2020. a, b, c
Wang, B. and LinHo: Rainy Season of the Asian–Pacific Summer Monsoon, J. Climate, 15, 386–398, https://doi.org/10.1175/1520-0442(2002)015<0386:RSOTAP>2.0.CO;2, 2002. a, b, c, d
Wang, C.-C., Chen, G. T.-J., and Ho, K.-H.: A Diagnostic Case Study of Mei-Yu Frontal Retreat and Associated Low Development near Taiwan, Mon. Weather Rev., 144, 2327–2349, https://doi.org/10.1175/MWR-D-15-0391.1, 2016.
a, b
Webster, P. J., Magaña, V. O., Palmer, T. N., Shukla, J., Tomas, R. A., Yanai, M., and Yasunari, T.: Monsoons: Processes, predictability, and the prospects for prediction, J. Geophys. Res.-Oceans, 103, 14451–14510, https://doi.org/10.1029/97JC02719, 1998. a
Wu, G., Liu, Y., Zhang, Q., Duan, A., Wang, T., Wan, R., Liu, X., Li, W., Wang, Z., and Liang, X.: The Influence of Mechanical and Thermal Forcing by the Tibetan Plateau on Asian Climate, J. Hydrometeorol., 8, 770–789, https://doi.org/10.1175/JHM609.1, 2007. a
Wu, G., Liu, Y., He, B., Bao, Q., Duan, A., and Jin, F.-F.: Thermal Controls on the Asian Summer Monsoon, Sci. Rep.-UK, 2, 404, https://doi.org/10.1038/srep00404, 2012. a
Yang, S., Gao, S., and Lu, C.: Investigation of the mei-yu front using a new deformation frontogenesis function, Adv. Atmos. Sci., 32, 635–647, https://doi.org/10.1007/s00376-014-4147-7, 2015. a, b
Yatagai, A., Arakawa, O., Kamiguchi, K., Kawamoto, H., Nodzu, M. I., and Hamada, A.: A 44-Year Daily Gridded Precipitation Dataset for Asia Based on a Dense Network of Rain Gauges, SOLA, 5, 137–140, https://doi.org/10.2151/sola.2009-035, 2009. a
Yihui, D.: Summer Monsoon Rainfalls in China, J. Meteorol. Soc. Jpn. Ser. II, 70, 373–396, https://doi.org/10.2151/jmsj1965.70.1B_373, 1992. a
Yihui, D.: Seasonal March of the East-Asian Summer Monsoon, World Scientific, 3–53, https://doi.org/10.1142/9789812701411_0001, 2004. a
Yihui, D. and Chan, J. C. L.: The East Asian summer monsoon: an overview, Meteorol. Atmos. Phys., 89, 117–142, https://doi.org/10.1007/s00703-005-0125-z, 2005. a, b, c, d
Short summary
In this study we analyse the complex seasonal evolution of the East Asian summer monsoon. Using reanalysis data, we show the importance of the interaction between tropical and extratropical air masses converging at the monsoon front, particularly during its northward progression. The upper-level flow pattern (e.g. the westerly jet) controls the balance between the airstreams and thus the associated rainfall. This framework provides a basis for studies of extreme events and climate variability.
In this study we analyse the complex seasonal evolution of the East Asian summer monsoon. Using...
