HR: 09:45h
AN: U41B-08    [Abstracts]
TI: Climate Reconstruction and Historical Fire Regime in Cerro El Mohinora, Chihuahua, Mexico
AU: * Cerano-Paredes, J
EM: cerano_dendroc@yahoo.com.mx
AF: INIFAP CENID-RASPA, Km 6.5 Margen Derecha del Canal Sacramento, Gomez Palacio, Dgo 35140, Mexico
AU: Villanueva-Diaz, J
EM: villanueva.jose@inifap.gob.mx
AF: INIFAP CENID-RASPA, Km 6.5 Margen Derecha del Canal Sacramento, Gomez Palacio, Dgo 35140, Mexico
AU: Arreola-Avila, J G
AF: Universidad Autonoma Chapingo, Carr. Gomez Palacio-Cd. Juarez, Bermejillo, Dgo 35230, Mexico
AU: Sanchez-Cohen, I
EM: sanchez.ignacio@inifap.gob.mx
AF: INIFAP CENID-RASPA, Km 6.5 Margen Derecha del Canal Sacramento, Gomez Palacio, Dgo 35140, Mexico
AU: Valdez-Cepeda, R D
EM: vacrida@gmail.com
AF: UACH, Centro Regional Centro-Norte, Km 35 Carr. Zac.-Guadalajara, Orito, Zac , Mexico
AU: Garcia, G
AF: Universidad Autonoma Chapingo, Carr. Gomez Palacio-Cd. Juarez, Bermejillo, Dgo 35230, Mexico
AB: Tree rings constitute one of the most important sources of low and high frequency resolution for climate reconstruction for the last millennium. Chronologies of total ring width, earlywood, and latewood were developed from a Douglas-fir in a mixed conifer stand in Cerro El Mohinora, Chihuahua, Mexico. The tree-ring chronology extended back in time for 349 years (1657 - 2005) showing a high sensibility to climate variability. Therefore, total ring width indices were used as a proxy of the climate variability in the area. Intensive droughts were observed in the periods 1695-1715, 1753-1760, 1786-1792, 1798-1806, 1819-1830, 1841-1870, 1890-1899, 1906-1912, 1924-1941, 1971-1977, and 1994- 2005. The most prolonged droughts took place in the periods 1695-1715, 1841-1870, 1924-1941, and 1994-2005. Pluvials were less frequent in this reconstruction and were observed for the 1680s, 1900s, and 1970s. Pine species were sampled for fire frequency studies at the upper and lower watershed of Cerro El Mohinora. The fire frequency reconstruction extended from 1800 to 2005 for the upper watershed, and fire years were detected in 1999, 1988, 1971, 1967, 1964, 1950, 1945, 1923, 1904, 1889, 1882, 1873, 1862, 1853, and 1837. At the lower watershed fire frequency was reconstructed from 1900 to 2005. Fires were present for the years 1995, 1988, 1985, 1971, 1945, 1943, 1933, 1923, and 1900. Common fire years for upper and lower elevations were observed in 1988, 1971, 1945, and 1923. The fire year of 1971 affected the whole watershed and could be related to the severe drought prevailing in that decade. Preliminary results show a good correspondence between prolonged dry conditions and presence of fires, but further analysis remain to be done.
DE: 1833 Hydroclimatology
DE: 3309 Climatology (1616, 1620, 3305, 4215, 8408)
DE: 4920 Dendrochronology
DE: 4922 El Nino (4522)
DE: 4950 Paleoecology
SC: Union [U]
MN: 2007 Joint Assembly