Understanding the wet season variations over Florida
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The wet season of Florida is well defined and is invariably centered in the boreal summer season of June–July–August. In this observational study we objectively define the Length of the Wet Season (LOWS) for Florida and examine its variations with respect to El Niño and the Southern Oscillation (ENSO) and the Atlantic Warm Pool (AWP). Our study reveals that ENSO variability has a profound influence on the LOWS especially over south Florida and parts of panhandle Florida prior to 1976. In the post-1976 era the influence of ENSO has significantly diminished. Our results show that in this pre-1976 era, warm (cold) ENSO events in the boreal winter are followed by long (short) LOWS over the region. This variation is consistent with warm (cold) ENSO events influencing early (late) onset of the wet season in the region. There is significant relationship of the LOWS in south and northeast Florida with the variation of the AWP. Unlike the teleconnection with ENSO the relationship of the demise of the wet season with AWP is stronger in the post-1976 period compared to the pre-1976 period. Furthermore the variability of the LOWS has increased in the post-1976 period.
KeywordsENSO Wet season AMO PDO Climate change
This work was supported by NOAA grant NA07OAR4310221, USGS grant 06HQGR0125, USDA, and CDC grant 5U01EH000421. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the acknowledged funding agencies.
- Efron B, Tibshirani RJ (1993) An introduction to the bootstrap. Chapman and HallGoogle Scholar
- Harrison M, Meindl CF (2001) A statistical relationship between El Niño-Southern Oscillation and Florida wildfire occurrence. Phys Geogr 22:187–203Google Scholar
- Higgins RW, Shi W, Yarosh E, Joyce R (2000) Improved United States precipitation quality control system and analysis. NCEP/CPC ATLAS No. 7. Also available at: http://www.cpc.ncep.noaa.gov/research_papers/ncep_cpc_atlas/7/index.html
- Kerr RA (1997) A new driver for the Atlantic’s moods and Europe’s weather? Science 275:754–755Google Scholar
- McClave JT and Dietric II FH (1994) Statistics. MacMillan College Publishing CoGoogle Scholar
- Misra V, Moeller L, Stefanova S, Chan S, O’Brien JJ, SmithIII TJ, Plant N (2011) The influence of the Atlantic warm pool on the panhandle Florida Sea Breeze. J Geophys Res (Atmospheres). doi: 10.1029/2010JD01,1-x
- Philander SG (1990) El Niño, La Niña, and the Southern Oscillation. Academic PressGoogle Scholar
- Stefanova L, Misra V, O’Brien JJ, Chassignet E, Hameed S (2011) Multimodel seasonal climate hindcast skill and predictability for the southeast United States. Clim Dyn. doi: 10.1007/s00382-,1-x (in press)
- Stroman A (2011) The rendition of the Atlantic warm pool in reanalyses. Master thesis, Florida State University. Available from etd.lib.fsu.edu/theses/available/etd-08042011-175240/Google Scholar
- Wang C, Lee S-K (2007) Atlantic warm pool, Caribbean low-level jet, and their potential impact on Atlantic hurricanes. Geophys Res Lett 34. doi: 10.1029/2006GL028579