Relating global precipitation to atmospheric fronts

Geophysical Research Letters - Tập 39 Số 10 - 2012
Jennifer L. Catto1, Christian Jakob2, Gareth J. Berry2, Neville Nicholls1
1School of Geography and Environmental Science Monash University Melbourne Victoria Australia
2School of Mathematical Sciences, Monash University, Melbourne, Victoria, Australia

Tóm tắt

Atmospheric fronts are important for the day‐to‐day variability of weather in the midlatitudes, particularly during winter when extratropical storm‐tracks are at their maximum intensity. Fronts are often associated with heavy rain, and strongly affect the local space‐time distribution of rainfall. A recently developed objective front identification method that distinguishes between cold, warm and quasi‐stationary fronts, is applied to reanalysis data and combined with a daily global gridded data set to investigate how precipitation around the globe is associated with atmospheric fronts. A large proportion (up to 90%) of rainfall in the major storm‐track regions is associated with fronts, particularly cold and warm fronts. Precipitation over the oceanic storm‐tracks is mostly associated with cold fronts, while over the Northern Hemisphere continents precipitation is mainly associated with warm fronts. There are seasonal and regional variations in the proportion of precipitation associated with fronts.

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Tài liệu tham khảo

10.1029/2010GL046451

10.1029/2011GL049481

10.1175/2008JCLI2678.1

Bjerknes J., 1922, Life cycle of cyclones and the polar front theory of atmospheric circulation, Geophys. Publ., 3, 1

Browning K. A., 1994, The structure of a frontal cyclone, Q. J. R. Meteorol. Soc., 120, 1535

10.1175/2009JCLI3318.1

10.1175/2011JCLI4181.1

10.1175/1520-0442(2002)015<02163:STD>2.0.CO;2

Dee D. P., 2001, The ERA‐Interim reanalysis: Configuration and performance of the data assimilation system, Q. J. R. Meteorol. Soc., 137, 553, 10.1002/qj.828

10.1175/JCLI3998.1

10.1175/JCLI4257.1

10.1017/S1350482798000553

Hoskins B. J., 2002, New perspectives on the Northern Hemisphere winter storm tracks, J. Clim., 59, 1041

10.1175/JCLI3570.1

10.1175/1525-7541(2001)002<0036:GPAODD>2.0.CO;2

10.1175/2008JCLI2217.1

10.1029/2011GL049783

Pitt M.(2008) The Pitt Review—Lessons learned from the 2007 summer floods final report Environ.Agency London.

10.1175/JAM2394.1

10.1175/JCLI-D-11-00100.1

10.1111/j.1600-0870.2006.00147.x

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Geophysical Research Letters

Tập 39 Số 10

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