STUDY OF CLIMATE CHANGE HAZARDS USING THE CLIMATE HAZARD INDEX IN INDONESIA
Ismail Robbani, Joko Wiratmo, Armi Susandi

Faculty of Earth Science and Technology
Institut Teknologi Bandung

Abstract

Climate change is a serious problem that must be faced by the world. This impacts ecosystems and people in all parts of the world^s continents and oceans and poses grave risks to human health, global food security and economic development. One of the steps to reduce climate change disasters is climate risk management. Climate Risk Index (CRI) is a quantitative calculation of one or many climate risks with thresholds specific to extreme weather and climate events that cause disasters. One of the stages in preparing the CRI is to determine the hazard value index or Climate Hazard Index (CHI). Because the climatic conditions in Indonesia vary with rainfall, it is necessary to conduct a study to determine the CHI associated with this variable. In this study, climate hazards are defined as hazards that are directly related to the climate in Indonesia, namely rainfall. The hazard events studied are drought and extreme rain. Then the constituent components of the CHI studied are the drought index and the extreme rain index. Hazard studies in Indonesia show that there is an increasing trend in each of the CHI component indexes with a very high frequency of hazard events occurring frequently from 1995 to 2021. June is the month that has the highest average CHI among other months throughout the year 1962-2021. In terms of spatial patterns, CHI is extreme in the Indonesian region with local and equatorial rainfall patterns. Whereas in the monsoon pattern, CHI is in the medium-very low range. Furthermore, CHI can be influenced by several factors, one of which is forest land cover. The results show that when the loss of forest land cover increases, the CHI value and its component index will also increase in the short term.

Keywords: Hazard, Climate change, Climate Hazard Index, Indonesia

Topic: Ocean-Atmosphere Dynamics