aris suwondo | Institut Teknologi Bandung (original) (raw)
Papers by aris suwondo
Historical climate data is fundamental for understanding local climate trends and extremes, and e... more Historical climate data is fundamental for understanding local climate trends and extremes, and evaluating the impact of climate change on agriculture, food security and water resources. The data can be used for implementing adaptation measures for protecting lives and adapting socio-economic sectors to the changing climate conditions. While global climate trends can already be assessed with available data, regional data disparities result in blind-spots for climate change assessments and services—particularly for areas which are the most vulnerable. Coordination between countries is vital, since weather and climate phenomena often span country borders. To contribute to filling this gap, International Climate Assessment & Dataset (ICA&D), with support from the EU-funded ClimSA Programme, is being extended to the climate-vulnerable areas of the Caribbean, the Pacific and in 5 sub-regions in Africa. ICA&D will be managed in each ClimSA sub-region by a WMO Regional Climate Centre (RCC)...
<p>Historical climate data is fundamental for understanding local climate trends an... more <p>Historical climate data is fundamental for understanding local climate trends and extremes and evaluating the impact of climate change on agriculture, food security and water resources. In addition, the data is &#160;used for implementing adaptation measures for protecting lives and adapting socio-economic sectors to the changing climate conditions. While global climate trends can already be assessed with available data, regional data disparities result in blind-spots for climate change assessments&#8212;particularly for areas which are the most vulnerable.</p> <p>To contribute to filling this gap, the International Climate Assessment & Dataset (ICA&D) has been extended to the climate-vulnerable areas of the Caribbean, the Pacific and in 5 sub-regions in Africa. ICA&D provides an accessible, web-based system to collect, prepare, quality control, and analyze basic climatological data with daily resolution. The system was developed over 25 years ago by the Meteorological Service of the Netherlands (KNMI) as the backbone of the European WMO data-node of the Regional Climate Centre (https://www.ecad.eu/) and implemented in Southeast Asia by meteorological service of Indonesia (BMKG). Now, with support from the EU-funded ClimSA project, under which WMO is implementing a &#8364;5.5 million grant, ICA&D will be further extended and run by Regional Climate Centers assigned and supported by WMO.</p> <p>WMO and KNMI collaborated in 2022 through CLIMSA project to expand ICA&D to two pilot regions, the Caribbean and West-Africa on https://caribbean.icad-wmo.org/ and http://west-africa.icad-wmo.org/. The collaboration has led to setting up new websites which are designed to be user friendly and highly cyber secure. The websites, one for each region, consist of information platforms, including a geographical map with the locations of the stations&#8217; datasets, and a feature to quickly plot timeseries from derived data and an e-learning module on the website&#8217;s functions. The data sharing policy ensures that access to raw observational data from National Meteorological and Hydrological Services (NMHS) remain restricted while allowing derived indices to be accessed by the public. Indices alone can monitor critical areas and impacts of climate change, such as the temperature of the warmest night of the year, the subsequent impact on health and &#160;induced excess of mortality.</p>
Bulletin of the American Meteorological Society, 2015
ABSTRACT
Indonesian Journal on Geoscience
Most of the destructive earthquakes in Sumatra are dominated by thrust mechanisms that occur due ... more Most of the destructive earthquakes in Sumatra are dominated by thrust mechanisms that occur due to the process of subduction and some earthquakes with strike-slip fault sources such as the Sumatra fault and northwestern Sumatra. Subduction zones along western Sumatra and Sumatran fault zones are active seismic sources of earthquake events. The seismotectonics of South Sumatra can be affected by earthquakes triggered by these seismic sources. In this study, an estimation and analysis of the potential for earthquake hazard curves were carried out in Palembang City due to the influence of subduction zone sources, strike-slip faults, and intermediate to deep earthquake sources. The algorithm of the seismicity smoothing was applied to estimate the seismicity rate for megathrust sources, active faults, and intermediate to deep earthquake sources. The smoothing algorithm is applied to estimate the seismicity rate for megathrust sources, active faults, and intermediate to deep earthquake sources. The earthquake hazard potential curve results showed that the estimated Peak Ground Acceleration (PGA) in the subduction earthquake sources bedrock was greater than the estimated ground shaking due to strike slip fault sources and intermediate to deep earthquake source. To understand better the potential ground shaking, the evaluation of PGA at the surface was then estimated by including the amplification factor. The amplification factor is calculated using the Horizontal-Vertical Spectral Ratio (HVSR) method. Based on the PGA estimated at the surface of 10% probability exceedance level during 50 years, the Palembang City has a potential shaking of around 35 gal, which is likely to be caused by a megathrust earthquake source.
18th Annual Meeting of the Asia Oceania Geosciences Society
The implementation of the Seismic Quiescence Index (SQI) into seismic hazard study and analysis ... more The implementation of the Seismic Quiescence Index (SQI) into seismic hazard study and analysis mapped around the off southern coast of Sumatra - West Java. The 15 years of Region Time Length (RTL) were used in this study. To construct the SQI, first of all, we divided the period of the declustered shallow earthquake catalog of observation into two parts, i.e., a period of 1978 to 1992 and 1993 to June 2006. Two rate models were then developed to estimate the probability of a given magnitude and a specified time window. The result was then used to determine the probability difference between the two periods of observation and SQI estimation. The SQI then used better to understand the pattern of seismicity changes for PSHA. To construct the model for SHA is done by developing the seismicity rate model of the period 1978 to June 2006 and then weighted by the SQI index. Furthermore, the median Peak Ground Acceleration (PGA) of 10% probability exceedance level for 50 years is estimated...
Geoscience Letters, 2020
Significant earthquakes on the island of Sumatra, Indonesia, have predominantly been earthquakes ... more Significant earthquakes on the island of Sumatra, Indonesia, have predominantly been earthquakes with a thrust mechanism that occurred due to the subduction process and seismotectonics near coastal cities of West and South Sumatra, which could be affected by earthquakes triggered by these seismic sources. We compared the Seismic Hazard Function (SHF) of two coastal cities of Sumatra: Bengkulu and Padang. The results showed that the SHF of Bengkulu is higher than that of Padang. Estimated earthquake hazards are presented in the form of seismic hazard maps expressed as the PGA of 10% rate of exceedance probability in 50 years. In estimating the seismic potential in Sumatra, the seismic moment rate was jointly estimated from the smoothed mean seismicity rate and the pre-seismic subduction surface strain rate model. In this study, the island of Sumatra was chosen as a master model for Seismic Hazard Analysis (SHA). The motivation for choosing Sumatra for the SHA was because of the large...
Historical climate data is fundamental for understanding local climate trends and extremes, and e... more Historical climate data is fundamental for understanding local climate trends and extremes, and evaluating the impact of climate change on agriculture, food security and water resources. The data can be used for implementing adaptation measures for protecting lives and adapting socio-economic sectors to the changing climate conditions. While global climate trends can already be assessed with available data, regional data disparities result in blind-spots for climate change assessments and services—particularly for areas which are the most vulnerable. Coordination between countries is vital, since weather and climate phenomena often span country borders. To contribute to filling this gap, International Climate Assessment & Dataset (ICA&D), with support from the EU-funded ClimSA Programme, is being extended to the climate-vulnerable areas of the Caribbean, the Pacific and in 5 sub-regions in Africa. ICA&D will be managed in each ClimSA sub-region by a WMO Regional Climate Centre (RCC)...
<p>Historical climate data is fundamental for understanding local climate trends an... more <p>Historical climate data is fundamental for understanding local climate trends and extremes and evaluating the impact of climate change on agriculture, food security and water resources. In addition, the data is &#160;used for implementing adaptation measures for protecting lives and adapting socio-economic sectors to the changing climate conditions. While global climate trends can already be assessed with available data, regional data disparities result in blind-spots for climate change assessments&#8212;particularly for areas which are the most vulnerable.</p> <p>To contribute to filling this gap, the International Climate Assessment & Dataset (ICA&D) has been extended to the climate-vulnerable areas of the Caribbean, the Pacific and in 5 sub-regions in Africa. ICA&D provides an accessible, web-based system to collect, prepare, quality control, and analyze basic climatological data with daily resolution. The system was developed over 25 years ago by the Meteorological Service of the Netherlands (KNMI) as the backbone of the European WMO data-node of the Regional Climate Centre (https://www.ecad.eu/) and implemented in Southeast Asia by meteorological service of Indonesia (BMKG). Now, with support from the EU-funded ClimSA project, under which WMO is implementing a &#8364;5.5 million grant, ICA&D will be further extended and run by Regional Climate Centers assigned and supported by WMO.</p> <p>WMO and KNMI collaborated in 2022 through CLIMSA project to expand ICA&D to two pilot regions, the Caribbean and West-Africa on https://caribbean.icad-wmo.org/ and http://west-africa.icad-wmo.org/. The collaboration has led to setting up new websites which are designed to be user friendly and highly cyber secure. The websites, one for each region, consist of information platforms, including a geographical map with the locations of the stations&#8217; datasets, and a feature to quickly plot timeseries from derived data and an e-learning module on the website&#8217;s functions. The data sharing policy ensures that access to raw observational data from National Meteorological and Hydrological Services (NMHS) remain restricted while allowing derived indices to be accessed by the public. Indices alone can monitor critical areas and impacts of climate change, such as the temperature of the warmest night of the year, the subsequent impact on health and &#160;induced excess of mortality.</p>
Bulletin of the American Meteorological Society, 2015
ABSTRACT
Indonesian Journal on Geoscience
Most of the destructive earthquakes in Sumatra are dominated by thrust mechanisms that occur due ... more Most of the destructive earthquakes in Sumatra are dominated by thrust mechanisms that occur due to the process of subduction and some earthquakes with strike-slip fault sources such as the Sumatra fault and northwestern Sumatra. Subduction zones along western Sumatra and Sumatran fault zones are active seismic sources of earthquake events. The seismotectonics of South Sumatra can be affected by earthquakes triggered by these seismic sources. In this study, an estimation and analysis of the potential for earthquake hazard curves were carried out in Palembang City due to the influence of subduction zone sources, strike-slip faults, and intermediate to deep earthquake sources. The algorithm of the seismicity smoothing was applied to estimate the seismicity rate for megathrust sources, active faults, and intermediate to deep earthquake sources. The smoothing algorithm is applied to estimate the seismicity rate for megathrust sources, active faults, and intermediate to deep earthquake sources. The earthquake hazard potential curve results showed that the estimated Peak Ground Acceleration (PGA) in the subduction earthquake sources bedrock was greater than the estimated ground shaking due to strike slip fault sources and intermediate to deep earthquake source. To understand better the potential ground shaking, the evaluation of PGA at the surface was then estimated by including the amplification factor. The amplification factor is calculated using the Horizontal-Vertical Spectral Ratio (HVSR) method. Based on the PGA estimated at the surface of 10% probability exceedance level during 50 years, the Palembang City has a potential shaking of around 35 gal, which is likely to be caused by a megathrust earthquake source.
18th Annual Meeting of the Asia Oceania Geosciences Society
The implementation of the Seismic Quiescence Index (SQI) into seismic hazard study and analysis ... more The implementation of the Seismic Quiescence Index (SQI) into seismic hazard study and analysis mapped around the off southern coast of Sumatra - West Java. The 15 years of Region Time Length (RTL) were used in this study. To construct the SQI, first of all, we divided the period of the declustered shallow earthquake catalog of observation into two parts, i.e., a period of 1978 to 1992 and 1993 to June 2006. Two rate models were then developed to estimate the probability of a given magnitude and a specified time window. The result was then used to determine the probability difference between the two periods of observation and SQI estimation. The SQI then used better to understand the pattern of seismicity changes for PSHA. To construct the model for SHA is done by developing the seismicity rate model of the period 1978 to June 2006 and then weighted by the SQI index. Furthermore, the median Peak Ground Acceleration (PGA) of 10% probability exceedance level for 50 years is estimated...
Geoscience Letters, 2020
Significant earthquakes on the island of Sumatra, Indonesia, have predominantly been earthquakes ... more Significant earthquakes on the island of Sumatra, Indonesia, have predominantly been earthquakes with a thrust mechanism that occurred due to the subduction process and seismotectonics near coastal cities of West and South Sumatra, which could be affected by earthquakes triggered by these seismic sources. We compared the Seismic Hazard Function (SHF) of two coastal cities of Sumatra: Bengkulu and Padang. The results showed that the SHF of Bengkulu is higher than that of Padang. Estimated earthquake hazards are presented in the form of seismic hazard maps expressed as the PGA of 10% rate of exceedance probability in 50 years. In estimating the seismic potential in Sumatra, the seismic moment rate was jointly estimated from the smoothed mean seismicity rate and the pre-seismic subduction surface strain rate model. In this study, the island of Sumatra was chosen as a master model for Seismic Hazard Analysis (SHA). The motivation for choosing Sumatra for the SHA was because of the large...