Abstract:
Seasonal variability arising from Pacific ocean surface temperature anomalies known as El Niño and La Niña
phenomena. El Nino and La Nina have an impact on the agriculture, forestry, health and transport sectors in the
Indonesian province of South Kalimantan. The mapping of season variability associated with El Niño and La
Niña was based on rainfall data from 1997-2016 using the season index method. In the year of the El Niño
incidence the majority of ZOM experienced early onset dry season, longer season duration, rainy season onset
retreat and less than normal rainfall. In the year of La Niña the majority of ZOM experienced earlier rainy season
onset, longer rainfall duration and normal rainfall.