Articles | Volume 20, issue 22
https://doi.org/10.5194/acp-20-13857-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-13857-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Nov 2020
Research article |
| 18 Nov 2020
| 18 Nov 2020
Characterizing quasi-biweekly variability of the Asian monsoon anticyclone using potential vorticity and large-scale geopotential height field
RIKEN Center for Computational Science, Kobe, Japan
Kaoru Sato
Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Tokyo, Japan
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Cited articles
Annamalai, H. and Slingo, J.: Active/break cycles: diagnosis of the
intraseasonal variability of the Asian summer monsoon, Clim. Dynam.,
18, 85–102, 2001. a
Bian, J., Pan, L. L., Paulik, L., Vømel, H., Chen, H., and Lu, D.: In situ
water vapor and ozone measurements in Lhasa and Kunming during the
Asian summer monsoon, Geophys. Res. Lett., 39, L19808, https://doi.org/10.1029/2012GL052996, 2012. a
Branstator, G. and Teng, H.: Tropospheric Waveguide Teleconnections and Their
Seasonality, J. Atmos. Sci., 74, 1513–1532, 2017. a
Chen, B., Xu, X. D., Yang, S., and Zhao, T. L.: Climatological perspectives of air transport from atmospheric boundary layer to tropopause layer over Asian monsoon regions during boreal summer inferred from Lagrangian approach, Atmos. Chem. Phys., 12, 5827–5839, https://doi.org/10.5194/acp-12-5827-2012, 2012. a
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 (data available at: http://apps.ecmwf.int/datasets/, last access: 26 April 2020). a, b
Dethof, A., O'Neill, A., Slingo, J., and Smit, H.: A mechanism for moistening
the lower stratosphere involving the Asian summer monsoon, Q.
J. Roy. Meteor. Soc., 125, 1079–1106, 1999. a
Ding, Q. and Wang, B.: Circumglobal teleconnection in the Northern Hemisphere
summer, J. Climate, 18, 3483–3505, 2005. a
Ding, Q. and Wang, B.: Predicting extreme phases of the Indian summer
monsoon, J. Climate, 22, 346–363, 2009. a
Dunkerton, T. J.: Evidence of meridional motion in the summer lower
stratosphere adjacent to monsoon regions, J. Geophys. Res.-Atmos., 100, 16675–16688, 1995. a
Fadnavis, S., Roy, C., Chattopadhyay, R., Sioris, C. E., Rap, A., Müller, R., Kumar, K. R., and Krishnan, R.: Transport of trace gases via eddy shedding from the Asian summer monsoon anticyclone and associated impacts on ozone heating rates, Atmos. Chem. Phys., 18, 11493–11506, https://doi.org/10.5194/acp-18-11493-2018, 2018. a, b
Fujinami, H. and Yasunari, T.: Submonthly variability of convection and
circulation over and around the Tibetan Plateau during the boreal summer,
J. Meteorol. Soc. Jpn. Ser. II, 82, 1545–1564,
2004. a
Garny, H. and Randel, W. J.: Transport pathways from the Asian monsoon anticyclone to the stratosphere, Atmos. Chem. Phys., 16, 2703–2718, https://doi.org/10.5194/acp-16-2703-2016, 2016. a, b, c
Gettelman, A., Kinnison, D. E., Dunkerton, T. J., and Brasseur, G. P.: Impact
of monsoon circulations on the upper troposphere and lower stratosphere,
J. Geophys. Res.-Atmos., 109, D22101, https://doi.org/10.1029/2004JD004878, 2004. a
Gottschaldt, K.-D., Schlager, H., Baumann, R., Cai, D. S., Eyring, V., Graf, P., Grewe, V., Jöckel, P., Jurkat-Witschas, T., Voigt, C., Zahn, A., and Ziereis, H.: Dynamics and composition of the Asian summer monsoon anticyclone, Atmos. Chem. Phys., 18, 5655–5675, https://doi.org/10.5194/acp-18-5655-2018, 2018. a, b, c
Hoskins, B. J., McIntyre, M., and Robertson, A. W.: On the use and significance
of isentropic potential vorticity maps, Q. J. Roy.
Meteor. Soc., 111, 877–946, 1985. a
Krishnamurti, T., Daggupaty, S., Fein, J., Kanamitsu, M., and Lee, J. D.:
Tibetan high and upper tropospheric tropical circulations during northern
summer, B. Am. Meteorol. Soc., 54, 1234–1250,
1973. a
Lee, J.-Y., Wang, B., Wheeler, M. C., Fu, X., Waliser, D. E., and Kang, I.-S.:
Real-time multivariate indices for the boreal summer intraseasonal
oscillation over the Asian summer monsoon region, Clim. Dynam., 40,
493–509, 2013. a
Liu, Y., Hoskins, B., and Blackburn, M.: Impact of Tibetan orography and
heating on the summer flow over Asia, J. Meteorol. Soc.
Jpn. Ser. II, 85, 1–19, 2007. a
Luo, J., Pan, L. L., Honomichl, S. B., Bergman, J. W., Randel, W. J., Francis, G., Clerbaux, C., George, M., Liu, X., and Tian, W.: Space–time variability in UTLS chemical distribution in the Asian summer monsoon viewed by limb and nadir satellite sensors, Atmos. Chem. Phys., 18, 12511–12530, https://doi.org/10.5194/acp-18-12511-2018, 2018. a
Nakamura, N.: Modified Lagrangian-mean diagnostics of the stratospheric polar
vortices. Part I. Formulation and analysis of GFDL SKYHI GCM, J.
Atmos. Sci., 52, 2096–2108, 1995. a
Nash, E. R., Newman, P. A., Rosenfield, J. E., and Schoeberl, M. R.: An
objective determination of the polar vortex using Ertel's potential
vorticity, J. Geophys. Res.-Atmos., 101, 9471–9478,
1996. a
North, G. R., Bell, T. L., Cahalan, R. F., and Moeng, F. J.: Sampling errors in
the estimation of empirical orthogonal functions, Mon. Weather Rev.,
110, 699–706, 1982. a
Norton, W. A.: Breaking Rossby waves in a model stratosphere diagnosed by a
vortex-following coordinate system and a technique for advecting material
contours, J. Atmos. Sci., 51, 654–673, 1994. a
Nützel, M., Dameris, M., and Garny, H.: Movement, drivers and bimodality of the South Asian High, Atmos. Chem. Phys., 16, 14755–14774, https://doi.org/10.5194/acp-16-14755-2016, 2016. a, b, c, d
Ortega, S., Webster, P. J., Toma, V., and Chang, H.-R.: Quasi-biweekly
oscillations of the South Asian monsoon and its co-evolution in the upper
and lower troposphere, Clim. Dynam., 49, 1–16, https://doi.org/10.1007/s00382-016-3503-y, 2017. a, b
Ortega, S., Webster, P. J., Toma, V., and Chang, H. R.: The effect of
potential vorticity fluxes on the circulation of the tropical upper
troposphere, Q. J. Roy. Meteor. Soc., 144,
848–860, https://doi.org/10.1002/qj.3261, 2018. a
Pan, L. L., Kunz, A., Homeyer, C. R., Munchak, L. A., Kinnison, D. E., and Tilmes, S.: Commentary on using equivalent latitude in the upper troposphere and lower stratosphere, Atmos. Chem. Phys., 12, 9187–9199, https://doi.org/10.5194/acp-12-9187-2012, 2012. a, b
Pan, L. L., Honomichl, S. B., Kinnison, D. E., Abalos, M., Randel, W. J.,
Bergman, J. W., and Bian, J.: Transport of chemical tracers from the boundary
layer to stratosphere associated with the dynamics of the Asian summer
monsoon, J. Geophys. Res.-Atmos., 121, 14159–14174, https://doi.org/10.1002/2016JD025616, 2016. a, b, c
Park, M., Randel, W. J., Gettelman, A., Massie, S. T., and Jiang, J. H.:
Transport above the Asian summer monsoon anticyclone inferred from Aura
Microwave Limb Sounder tracers, J. Geophys. Res.-Atmos., 112, D16309, https://doi.org/10.1029/2006JD008294, 2007. a
Park, M., Randel, W. J., Emmons, L. K., Bernath, P. F., Walker, K. A., and Boone, C. D.: Chemical isolation in the Asian monsoon anticyclone observed in Atmospheric Chemistry Experiment (ACE-FTS) data, Atmos. Chem. Phys., 8, 757–764, https://doi.org/10.5194/acp-8-757-2008, 2008. a
Park, M., Randel, W. J., Emmons, L. K., and Livesey, N. J.: Transport pathways
of carbon monoxide in the Asian summer monsoon diagnosed from Model of
Ozone and Related Tracers (MOZART), J. Geophys. Res.-Atmos., 114, D08303, https://doi.org/10.1029/2008JD010621, 2009. a
Ploeger, F., Gottschling, C., Griessbach, S., Grooß, J.-U., Guenther, G., Konopka, P., Müller, R., Riese, M., Stroh, F., Tao, M., Ungermann, J., Vogel, B., and von Hobe, M.: A potential vorticity-based determination of the transport barrier in the Asian summer monsoon anticyclone, Atmos. Chem. Phys., 15, 13145–13159, https://doi.org/10.5194/acp-15-13145-2015, 2015. a, b, c, d, e, f, g, h
Randel, W. J., Park, M., Emmons, L., Kinnison, D., Bernath, P., Walker, K. A.,
Boone, C., and Pumphrey, H.: Asian monsoon transport of pollution to the
stratosphere, Science, 328, 611–613, 2010. a
Santee, M., Manney, G., Livesey, N., Schwartz, M., Neu, J., and Read, W.: A
comprehensive overview of the climatological composition of the Asian
summer monsoon anticyclone based on 10 years of Aura Microwave Limb
Sounder measurements, J. Geophys. Res.-Atmos., 122,
5491–5514, 2017. a
Terao, T.: Barotropic disturbances on intraseasonal time scales observed in the
midlatitudes over the Eurasian continent during the northern summer,
J. Meteorol. Soc. Jpn. Ser. II, 76, 419–436, 1998. a
Vogel, B., Günther, G., Müller, R., Grooß, J.-U., Hoor, P., Krämer, M., Müller, S., Zahn, A., and Riese, M.: Fast transport from Southeast Asia boundary layer sources to northern Europe: rapid uplift in typhoons and eastward eddy shedding of the Asian monsoon anticyclone, Atmos. Chem. Phys., 14, 12745–12762, https://doi.org/10.5194/acp-14-12745-2014, 2014. a
Vogel, B., Günther, G., Müller, R., Grooß, J.-U., Afchine, A., Bozem, H., Hoor, P., Krämer, M., Müller, S., Riese, M., Rolf, C., Spelten, N., Stiller, G. P., Ungermann, J., and Zahn, A.: Long-range transport pathways of tropospheric source gases originating in Asia into the northern lower stratosphere during the Asian monsoon season 2012, Atmos. Chem. Phys., 16, 15301–15325, https://doi.org/10.5194/acp-16-15301-2016, 2016. a, b, c, d
Vogel, B., Müller, R., Günther, G., Spang, R., Hanumanthu, S., Li, D., Riese, M., and Stiller, G. P.: Lagrangian simulations of the transport of young air masses to the top of the Asian monsoon anticyclone and into the tropical pipe, Atmos. Chem. Phys., 19, 6007–6034, https://doi.org/10.5194/acp-19-6007-2019, 2019.
a, b
Wei, W., Zhang, R., Yang, S., Li, W., and Wen, M.: Quasi-Biweekly Oscillation
of the South Asian High and Its Role in Connecting the Indian and East Asian
Summer Rainfalls, Geophys. Res. Lett., 46, 14742–14750,
https://doi.org/10.1029/2019GL086180, 2019. a
Zhang, Q., Guoxiong, W., and Yongfu, Q.: The bimodality of the 100 hPa
South Asia High and its relationship to the climate anomaly over East
Asia in summer, J. Meteorol. Soc. Jpn. Ser. II,
80, 733–744, 2002. a
Short summary
The spatial pattern of subseasonal variability of the Asian monsoon anticyclone (AMA) is analyzed using long-term reanalysis data, integrating two different views using potential vorticity and the geopotential height anomaly. This study provides a link between two existing description of the Asian monsoon anticyclone, which is important for the understanding of the whole life cycle of its characteristic subseasonal variability pattern.
The spatial pattern of subseasonal variability of the Asian monsoon anticyclone (AMA) is...
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