Daily Archives: January 7, 2013

Mexican coast tropical cyclones coincide with solar cycles…

Marni Pazos, Blanca Mendoza. Landfalling Tropical Cyclones Along the Eastern Pacific Coast between the 16th and 20th Centuries. Journal of Climate, 2013 doi: http://dx.doi.org/10.1175/JCLI-D-11-00411.1

Numerous studies have been conducted to document long term trends in tropical cyclone (TC) activity. However, the eastern Pacific has not received as much attention as other basins. Here we attempt the identification of TC formation in the Mexican eastern Pacific ocean before 1950. Using bibliographical and historical file consultation, we constructed a catalog of events related to intense storms and possible TCs that made landfall in the Mexican Pacific coasts. Between 1536 and 1948 we found a total of 119 events related to TCs. Then, using the Saffir-Simpson scale and the climatology of the region as the criteria to evaluate each event, we found 85 TCs. Furthermore, we constructed a historical time series of TCs between 1701 and 2010. The spectral analysis showed periodicities of ~2.6, 4, 5, 12, 16, 39 and 105 years, that coincide with some large-scale climatic phenomena and also with solar activity. In particular, the ~12-year cycle is the most persistent periodicity in our study.

Click here for full paper (fee).