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Citation:

Influences of ENSO Events on Forest Fires in Heilongjiang Province

  • Received Date: 2008-10-27
  • The data of forest fires from 1980 to 1999 in Heilongjiang Province, NINO3.4 index and Southern Oscillation Index were analyzed by spectral analysis and correlation method, and the spectral periodicities were got individually. The periodicities of fire number and fire area were 10.00 years and 6.67 years respectively. The periodicities of both El Ni o and La Ni a were 5.00 years in these 20 years. The correlations between fire number or area and La Ni a or El Ni o were very significant. The fire area and fire number were negatively correlated with El Ni o, and the correlation coefficients were -0.523 1 and -0.659 4 respectively. The fire number and fire area were positively correlated with La Ni a, and the correlation coefficients were 0.525 4 and 0.536 3 respectively. The influence of La Ni a was less than that of El Ni o. The fire area and fire number increased abnormally after warm ENSO events year.
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Influences of ENSO Events on Forest Fires in Heilongjiang Province

  • 1. Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry,Key Laboratory of Forest Protection of State Forestry Administration, Beijing 100091, China

Abstract: The data of forest fires from 1980 to 1999 in Heilongjiang Province, NINO3.4 index and Southern Oscillation Index were analyzed by spectral analysis and correlation method, and the spectral periodicities were got individually. The periodicities of fire number and fire area were 10.00 years and 6.67 years respectively. The periodicities of both El Ni o and La Ni a were 5.00 years in these 20 years. The correlations between fire number or area and La Ni a or El Ni o were very significant. The fire area and fire number were negatively correlated with El Ni o, and the correlation coefficients were -0.523 1 and -0.659 4 respectively. The fire number and fire area were positively correlated with La Ni a, and the correlation coefficients were 0.525 4 and 0.536 3 respectively. The influence of La Ni a was less than that of El Ni o. The fire area and fire number increased abnormally after warm ENSO events year.

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