Editorial Type:
Article
Article Type:
Research Article

Southeast Asian Pressure Surges and Significant Events of Atmospheric Mass Loss from the Northern Hemisphere, and a Case Study Analysis

Marco L. Carrera Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, Quebec, Canada

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John R. Gyakum Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, Quebec, Canada

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Print Publication:
15 Sep 2007
DOI:
https://doi.org/10.1175/JCLI4266.1
Page(s):
4678–4701
Restricted access

Abstract

A recent study of significant events of atmospheric mass depletion from the Northern Hemisphere (NH) during the extended boreal winter indicated that Southeast Asian pressure surges were an important physical mechanism that acted to channel the atmospheric mass equatorward out of the NH on a rapid time scale. This study builds upon this finding and examines both the direct and indirect roles of Southeast Asian pressure surges for a particular event of dry atmospheric mass depletion from the NH. The focus of this study is on the enhanced interhemispheric interactions and associated Southern Hemisphere (SH) tropical and extratropical responses resulting from the pressure surges.

First, this study examines the conservation of dry atmospheric mass (i.e., the relationship between the dry meridional winds and the area-integrated dry air surface pressure) in the NCEP reanalysis for the 25 significant events of dry atmospheric mass depletion from the NH. Results indicate that the NCEP dry meridional winds are able to qualitatively capture the dry atmospheric mass evacuation from the NH. In a quantitative sense there is very good agreement between the wind and pressure data in the extratropics of both hemispheres. A distinct negative or southward bias in the NCEP vertically and zonally integrated dry meridional winds is apparent between 5° and 17.5°N. This southward bias was not present in the ECMWF Re-Analysis. The source of the southward bias in NCEP appears to result from a weaker analyzed ITCZ.

The particular case of dry atmospheric mass depletion from the NH examined in detail is associated with an intense pressure surge over Southeast Asia. A significant enhancement of convection in the monsoon trough region of northern Australia occurs roughly 4 days after the peak intensity of the Siberian high. A low-level westerly wind burst develops in response to this enhanced zonal pressure gradient caused by the pressure surge as part of the onset of an active phase of the Australian summer monsoon. This study shows that three prominent anticyclonic circulations intensify in the SH extratropics, stretching from the south Indian Ocean to the South Pacific, beneath regions of upper-tropospheric dry atmospheric mass convergence, originating partly from the monsoon convection outflow. These anticyclonic circulations are regional manifestations of the dry atmospheric mass increase in the SH.

Corresponding author address: Dr. Marco L. Carrera, Environment Canada, 2121 Trans-Canada Highway, 5th Floor, Dorval, PQ H9P1J3, Canada. Email: marco.carrera@ec.gc.ca

Abstract

A recent study of significant events of atmospheric mass depletion from the Northern Hemisphere (NH) during the extended boreal winter indicated that Southeast Asian pressure surges were an important physical mechanism that acted to channel the atmospheric mass equatorward out of the NH on a rapid time scale. This study builds upon this finding and examines both the direct and indirect roles of Southeast Asian pressure surges for a particular event of dry atmospheric mass depletion from the NH. The focus of this study is on the enhanced interhemispheric interactions and associated Southern Hemisphere (SH) tropical and extratropical responses resulting from the pressure surges.

First, this study examines the conservation of dry atmospheric mass (i.e., the relationship between the dry meridional winds and the area-integrated dry air surface pressure) in the NCEP reanalysis for the 25 significant events of dry atmospheric mass depletion from the NH. Results indicate that the NCEP dry meridional winds are able to qualitatively capture the dry atmospheric mass evacuation from the NH. In a quantitative sense there is very good agreement between the wind and pressure data in the extratropics of both hemispheres. A distinct negative or southward bias in the NCEP vertically and zonally integrated dry meridional winds is apparent between 5° and 17.5°N. This southward bias was not present in the ECMWF Re-Analysis. The source of the southward bias in NCEP appears to result from a weaker analyzed ITCZ.

The particular case of dry atmospheric mass depletion from the NH examined in detail is associated with an intense pressure surge over Southeast Asia. A significant enhancement of convection in the monsoon trough region of northern Australia occurs roughly 4 days after the peak intensity of the Siberian high. A low-level westerly wind burst develops in response to this enhanced zonal pressure gradient caused by the pressure surge as part of the onset of an active phase of the Australian summer monsoon. This study shows that three prominent anticyclonic circulations intensify in the SH extratropics, stretching from the south Indian Ocean to the South Pacific, beneath regions of upper-tropospheric dry atmospheric mass convergence, originating partly from the monsoon convection outflow. These anticyclonic circulations are regional manifestations of the dry atmospheric mass increase in the SH.

Corresponding author address: Dr. Marco L. Carrera, Environment Canada, 2121 Trans-Canada Highway, 5th Floor, Dorval, PQ H9P1J3, Canada. Email: marco.carrera@ec.gc.ca

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  • Annamalai, H., J. M. Slingo, K. R. Sperber, and K. Hodges, 1999: The mean evolution and variability of the Asian summer monsoon: Comparison of ECMWF and NCEP–NCAR reanalyses. Mon. Wea. Rev., 127 , 1157–1186.

    • Search Google Scholar
    • Export Citation

  • Arkin, P. A., and P. E. Ardanuy, 1989: Estimating climatic-scale precipitation from space: A review. J. Climate, 2 , 1229–1238.

  • Berbery, E. H., and J. Nogués-Peagle, 1993: Intraseasonal interactions between the Tropics and extratropics in the Southern Hemisphere. J. Atmos. Sci., 50 , 1950–1965.

    • Search Google Scholar
    • Export Citation

  • Bosart, L. F., and G. M. Lackmann, 1995: Postlandfall tropical cyclone reintensification in a weakly baroclinic environment: A case study of Hurricane David (September 1979). Mon. Wea. Rev., 123 , 3268–3291.

    • Search Google Scholar
    • Export Citation

  • Carrera, M. L., and J. R. Gyakum, 2003: Significant events of interhemispheric atmospheric mass exchange: Composite structure and evolution. J. Climate, 16 , 4061–4078.

    • Search Google Scholar
    • Export Citation

  • Chang, C-P., and K. M. Lau, 1980: Northeasterly cold surges and near-equatorial disturbances over the winter MONEX area during December 1974. Part II: Planetary-scale aspects. Mon. Wea. Rev., 108 , 298–312.

    • Search Google Scholar
    • Export Citation

  • Chang, C-P., and K. G. Lum, 1985: Tropical–midlatitude interactions over Asia and the western Pacific Ocean during the 1983/84 northern winter. Mon. Wea. Rev., 113 , 1345–1358.

    • Search Google Scholar
    • Export Citation

  • Chen, T-C., 1985: Global water vapor flux and maintenance during FGGE. Mon. Wea. Rev., 113 , 1801–1819.

  • Chen, T-C., M-C. Yen, and H. van Loon, 1989: The effect of the divergent circulation on some aspects of the 1978/79 Southern Hemisphere monsoon. J. Climate, 2 , 1270–1288.

    • Search Google Scholar
    • Export Citation

  • Chen, T-C., J-M. Chen, S. Schubert, and L. L. Takacs, 1997: Seasonal variation of global surface pressure and water vapor. Tellus, 49A , 613–621.

    • Search Google Scholar
    • Export Citation

  • Chu, P-S., and S-U. Park, 1984: Regional circulation characteristics associated with a cold surge event over East Asia during winter MONEX. Mon. Wea. Rev., 112 , 955–965.

    • Search Google Scholar
    • Export Citation

  • Colle, B. A., and C. F. Mass, 1995: The structure and evolution of cold surges east of the Rocky Mountains. Mon. Wea. Rev., 123 , 2577–2610.

    • Search Google Scholar
    • Export Citation

  • Colucci, S. J., and J. C. Davenport, 1987: Rapid surface anticyclogenesis: Synoptic climatology and attendant large-scale circulation changes. Mon. Wea. Rev., 115 , 822–836.

    • Search Google Scholar
    • Export Citation

  • Colucci, S. J., A. Z. Loesch, and L. F. Bosart, 1981: Spectral evolution of a blocking episode and comparison with wave interaction theory. J. Atmos. Sci., 38 , 2092–2111.

    • Search Google Scholar
    • Export Citation

  • Compo, G. P., G. N. Kiladis, and P. J. Webster, 1999: The horizontal and vertical structure of East Asian winter monsoon pressure surges. Quart. J. Roy. Meteor. Soc., 125 , 29–54.

    • Search Google Scholar
    • Export Citation

  • Dallavalle, J. P., and L. F. Bosart, 1975: A synoptic investigation of anticyclogenesis accompanying North American polar air outbreaks. Mon. Wea. Rev., 103 , 941–957.

    • Search Google Scholar
    • Export Citation

  • Davidson, N. E., J. L. Mcbride, and B. J. McAvaney, 1984: Divergent circulations during the onset of the 1978–79 Australian monsoon. Mon. Wea. Rev., 112 , 1684–1696.

    • Search Google Scholar
    • Export Citation

  • Drosdowsky, W., 1996: Variability of the Australian summer monsoon at Darwin: 1957–1992. J. Climate, 9 , 85–96.

  • Garreaud, R. D., 2001: Subtropical cold surges: Regional aspects and global distribution. J. Climatol., 21 , 1181–1197.

  • Gibson, J. K., P. Kållberg, S. Uppala, A. Hernandez, A. Nomura, and E. Serrano, 1997: ECMWF Re-Analysis Project Report Series 1, 72 pp. [Available from European Centre for Medium-Range Weather Forecasts, Shinfield Park, Reading RG29AX, United Kingdom.].

  • Holton, J. R., 1992: An Introduction to Dynamic Meteorology. 3d ed. Academic Press, 511 pp.

  • Hoskins, B. J., M. E. McIntyre, and A. W. Robertson, 1985: On the use and significance of isentropic potential vorticity maps. Quart. J. Roy. Meteor. Soc., 111 , 877–946.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., and D. G. Vincent, 1990: Relationship between tropical heating and subtropical westerly maxima in the Southern Hemisphere during SOP-1, FGGE. J. Climate, 3 , 751–768.

    • Search Google Scholar
    • Export Citation

  • Johnson, D. R., M. Yanai, and T. L. Schaack, 1987: Global and regional distributions of atmospheric heat sources and sinks during GWE. Monsoon Meteorology, C.-P. Chang and T. N. Krishnamurti, Eds., Oxford University Press, 271–297.

  • Kalnay, E., and Coauthors, 1996: The NCEP/NCAR 40-Year Reanalysis Project. Bull. Amer. Meteor. Soc., 77 , 437–471.

  • Keith, R. P., W. Bate, B. K. Cheang, and P. Sankaran, 1991: The tropical circulation in the Australian/Asian region November 1988 to April 1989. Aust. Meteor. Mag., 39 , 37–46.

    • Search Google Scholar
    • Export Citation

  • Kiladis, G. N., 1998: Observations of Rossby waves linked to convection over the eastern tropical Pacific. J. Atmos. Sci., 55 , 321–339.

    • Search Google Scholar
    • Export Citation

  • Kiladis, G. N., and K. M. Weickmann, 1992: Circulation anomalies associated with tropical convection during northern winter. Mon. Wea. Rev., 120 , 1900–1923.

    • Search Google Scholar
    • Export Citation

  • Kiladis, G. N., G. A. Meehl, and K. M. Weickmann, 1994: Large-scale circulation associated with westerly wind bursts and deep convection over the western equatorial Pacific. J. Geophys. Res., 99 , 18527–18544.

    • Search Google Scholar
    • Export Citation

  • Knutson, T. R., and K. M. Weickmann, 1987: 30–60 day atmospheric oscillations: Composite life cycles of convection and circulation anomalies. Mon. Wea. Rev., 115 , 1407–1436.

    • Search Google Scholar
    • Export Citation

  • Lau, K-M., C-P. Chang, and P. H. Chan, 1983: Short-term planetary-scale interactions over the Tropics and midlatitudes. Part II: Winter-MONEX period. Mon. Wea. Rev., 111 , 1372–1388.

    • Search Google Scholar
    • Export Citation

  • Liebmann, B., and C. A. Smith, 1996: Description of a complete (interpolated) outgoing longwave radiation dataset. Bull. Amer. Meteor. Soc., 77 , 1275–1277.

    • Search Google Scholar
    • Export Citation

  • Lim, H-S., and C-H. Ho, 2000: Comparison of tropical rainfall between the observed GPCP data and the assimilation products of ECMWF, NCEP/NCAR, and NASA-GEOS-1. J. Meteor. Soc. Japan, 78 , 662–672.

    • Search Google Scholar
    • Export Citation

  • Love, G., 1985a: Cross-equatorial influence of winter hemisphere cold surges. Mon. Wea. Rev., 113 , 1487–1498.

  • Love, G., 1985b: Cross-equatorial interactions during tropical cyclogenesis. Mon. Wea. Rev., 113 , 1499–1509.

  • Matthews, A. J., B. J. Hoskins, J. M. Slingo, and M. Blackburn, 1996: Development of convection along the SPCZ with a Madden–Julian oscillation. Quart. J. Roy. Meteor. Soc., 122 , 669–688.

    • Search Google Scholar
    • Export Citation

  • Meehl, G. A., G. N. Kiladis, K. M. Weickmann, M. Wheeler, D. S. Gutzler, and G. P. Compo, 1996: Modulation of equatorial subseasonal convective episodes by tropical–extratropical interaction in the Indian and Pacific Ocean regions. J. Geophys. Res., 101 , 15033–15049.

    • Search Google Scholar
    • Export Citation

  • Mills, G. A., and S. Zhao, 1991: A study of a monsoon depression bringing record rainfall over Australia. Part I: Numerical predictability experiments. Mon. Wea. Rev., 119 , 2053–2073.

    • Search Google Scholar
    • Export Citation

  • Morgan, M. C., and J. W. Nielsen-Gammon, 1998: Using tropopause maps to diagnose midlatitude weather systems. Mon. Wea. Rev., 126 , 2555–2579.

    • Search Google Scholar
    • Export Citation

  • Murakami, T., and A. Sumi, 1982: Southern Hemisphere summer monsoon circulation during 1978–79 WMONEX Part I: Monthly mean wind fields. J. Meteor. Soc. Japan, 60 , 638–648.

    • Search Google Scholar
    • Export Citation

  • Newell, R. E., Y. Zhu, E. V. Browell, W. G. Read, and J. W. Waters, 1996: Walker circulation and tropical upper tropospheric water vapor. J. Geophys. Res., 101 , 1961–1974.

    • Search Google Scholar
    • Export Citation

  • Newman, M., P. D. Sardeshmukh, and J. W. Bergman, 2000: An assessment of the NCEP, NASA, and ECMWF reanalyses over the tropical west Pacific warm pool. Bull. Amer. Meteor. Soc., 81 , 41–48.

    • Search Google Scholar
    • Export Citation

  • Renwick, J. A., and M. J. Revell, 1999: Blocking over the South Pacific and Rossby wave propagation. Mon. Wea. Rev., 127 , 2233–2247.

  • Schultz, D. M., W. E. Bracken, and L. F. Bosart, 1998: Planetary- and synoptic-scale signatures associated with Central American cold surges. Mon. Wea. Rev., 126 , 5–27.

    • Search Google Scholar
    • Export Citation

  • Slingo, J. M., 1998: Extratropical forcing of tropical convection in a northern winter simulation with the UGAMP GCM. Quart. J. Roy. Meteor. Soc., 124 , 27–51.

    • Search Google Scholar
    • Export Citation

  • Suppiah, R., and X. Wu, 1998: Surges, cross-equatorial flows and their links with the Australian summer monsoon circulation and rainfall. Aust. Meteor. Mag., 47 , 113–130.

    • Search Google Scholar
    • Export Citation

  • Swartztrauber, P. N., and R. A. Sweet, 1975: Efficient FORTRAN subprograms for the solution of elliptic partial differential equations. Tech. Note TN/IA-109, 30 pp.

  • Trenberth, K. E., 1981: Seasonal variations in global sea level pressure and total mass of the atmosphere. J. Geophys. Res., 86 , 5236–5246.

    • Search Google Scholar
    • Export Citation

  • Trenberth, K. E., 1991: Climate diagnostics from global analyses: Conservation of mass in ECMWF analyses. J. Climate, 4 , 707–722.

  • Trenberth, K. E., and C. J. Guillemot, 1995: Evaluation of the global atmospheric moisture budget as seen from analyses. J. Climate, 8 , 2255–2272.

    • Search Google Scholar
    • Export Citation

  • Trenberth, K. E., and C. J. Guillemot, 1998: Evaluation of the atmospheric moisture and hydrological cycle in the NCEP/NCAR reanalyses. Climate Dyn., 14 , 213–231.

    • Search Google Scholar
    • Export Citation

  • Trenberth, K. E., and L. Smith, 2005: The mass of the atmosphere: A constraint on global analyses. J. Climate, 18 , 864–875.

  • Trenberth, K. E., J. R. Christy, and J. G. Olson, 1987: Global atmospheric mass, surface pressure, and water vapor variations. J. Geophys. Res., 92 , 14815–14826.

    • Search Google Scholar
    • Export Citation

  • Trenberth, K. E., D. P. Stepaniak, and J. M. Caron, 2000: The global monsoon as seen through the divergent atmospheric circulation. J. Climate, 13 , 3969–3993.

    • Search Google Scholar
    • Export Citation

  • Tyrrell, G. C., D. J. Karoly, and J. L. McBride, 1996: Links between tropical convection and variations of the extratropical circulation during TOGA COARE. J. Atmos. Sci., 53 , 2735–2748.

    • Search Google Scholar
    • Export Citation

  • Van den Dool, H., and S. Saha, 1993: Seasonal redistribution and conservation of atmospheric mass in a general circulation model. J. Climate, 6 , 22–30.

    • Search Google Scholar
    • Export Citation

  • Weickmann, K. M., and S. J. S. Khalsa, 1990: The shift of convection from the Indian Ocean to the western Pacific Ocean during a 30–60 day oscillation. Mon. Wea. Rev., 118 , 964–978.

    • Search Google Scholar
    • Export Citation

  • Wheeler, M., G. N. Kiladis, and P. J. Webster, 2000: Large-scale dynamical fields associated with convectively coupled equatorial waves. J. Atmos. Sci., 57 , 613–640.

    • Search Google Scholar
    • Export Citation

  • Williams, M., 1981: Interhemispheric interaction during Winter MONEX. Proc. Int. Conf. on Early Results of FGGE and Large-Scale Aspects of its Monsoon Experiment, Tallahassee, FL, World Meteorological Organization, 12–16.

  • Zhao, S., and G. A. Mills, 1991: A study of a monsoon depression bringing record rainfall over Australia. Part II: Synoptic–diagnostic description. Mon. Wea. Rev., 119 , 2074–2094.

    • Search Google Scholar
    • Export Citation
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