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Pemetaan Sumber Daya Laut Pulau Nias dengan Teknologi Penginderaan Jauh Satelit Pasca-Tsunami 2004 Gaol, Jonson Lumban; Arhatin, Risti Endriani; Manurung, Djisman; Kawaru, Mujizat
Jurnal Ilmu Pertanian Indonesia Vol 12, No 3 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Accurate and up-to-date information of marine resources is needed for optimum resource utilization. If the required information cannot be obtained with traditional field surveys, remote sensing as a tool for providing fast, efficient, and accurate information is used to detect the changes. The study aims to use remote sensing data for assessing distribustion and condition of marine resources in Nias waters before and after tsunami. Marine resources pararameter derived remote sensing data are sea surface temperature (SST), suspended solid matter, chlorphyll-a concentration, coral reef and mangrove distributions. Mapping and differences in coral reef and mangrove distribution were evaluated using two scans of Landsat image in 1989 and 2005. Sea surface temperature was derived from NOAA-AVHRR data, and chlorophyll-a concentration was derived from SeaWiFS data. The study showed that there were no significant changes of coral reef and mangrove distribution, SST, chlorophyll-a concentration after and before tsunami. Spectral analysis of SST and chlorophyll-a showed that the variability of the parameters was affected by monsoon system and global climate change, namely El Nino Southern Oscillation and Indian Ocean Dipole.Keywords: remote sensing, satellite, Nias, tsunami, chorophyll-a, coral reef, mangrove
CHLOROPHYLL-A CONCENTRATIONS ESTIMATION FROM AQUA-MODIS AND VIIRS-NPP SATELLITE SENSORS IN SOUTH JAVA SEA WATERS Nuris, Rayhan; Gaol, Jonson Lumban; Prayogo, Teguh
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 12, No 1 (2015)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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Abstract

This study aimed to estimate the concentration of chlorophyll-a from satellite imagery of National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP) in the south Java Sea waters and compare it to the concentrations of chlorophyll-a estimation result from the MODIS-Aqua satellite. NPP satellite had Visible/Infrared Imager Radiometer Suite (VIIRS) sensors which performance was same as Moderate Resolution Imaging Spectroradiometer (MODIS) sensor with a better spatial resolution. This study used daily satellite imagery of VIIRS-NPP for the period of September 2012 to August 2013. The algorithm that was used to estimate the concentration of chlorophyll-a was Ocean Color 3-band ratio (OC-3). The results showed that the spatial distribution pattern of chlorophyll-a concentration between VIIRS - NPP sensor and MODIS had the same pattern, but the estimation of chlorophyll-a concentration from the MODIS sensor was higher than VIIRS -NPP sensor. The concentration of chlorophyll-a showed that there were spatial and temporal variation in the south Java Sea waters. Generally, concentrations of chlorophyll-a was higher in East monsoon than West monsoon.
VARIABILITY OF CHLOROPHYLL-a CONCENTRATION OF THE NORTHERN SUMBAWA WATERS BASED ON Sea WiFS SATELLITE DATA Nababan, Bisman; Zulkarnaen, Diki; Gaol, Jonson Lumban
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 1, No 2 (2009): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Variability of chlorophyll-a concentrations of the northern Sumbawa waters was investigated based on SeaWiFS satellite data for the period of January 1998-December 2007. Chlorophyll-aconcentration was estimated employing OC4v4 algorithm. Chlorophyll-a concentrations of,SeaWiFS satellite data were obtained from the Goddard Space Flight Center, NASA archieve data. In general, fluctuations of chlorophyll-a concentration of the northern Sumbawa waters had three patterns i.e., the maximum with a range of 0,21-0,74 mg/m3 occurred during the West Season (November-February), the minimum with a range of 0.12-0.15 mg/m3 occurred during Transition Season I (March-April), and relatively high (second peak) with a range of 0.21-0.36 mg/m3 occurred during the mid-East Season until the beginning of Transition Season II (July-September).High chlorophyll-a concentration occurred during the West Season was closely related to the high rainfall, the possibility of vertical water mass mixing,and upwelling process in the northern coastal waters of Sumbawa. Meanwhile, the relatively high (second peak) of chlorophyll-aconcentration occurred in July-September was caused by the movement of water masses from the South of Makassar Strait containing relatively high chlorophyll-a concentrations and relatively low temperatures since upwelling processes occurred at this location in the same period. Keywords:Chlorophyll-a,northern Sumbawa waters, SeaWiFS, OC4v4, upwelling  
POTENSIAL FISHING GROUND MAPPING OF SKIPJACK AND FRIGATE TUNA IN NORTH NANGGROE ACEH DARUSSALAM WATERS Muklis, Muklis; Gaol, Jonson Lumban; Simbolon, Domu
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 1, No 1 (2009): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

Potential fishing ground mapping of skipjack and frigate tuna was determined based on sea surface temperature (SST) and chlorophyll-a concentration. The objectives of study were to analyze the temporal and spatial variability of SST and chlorophyll-a and it’s relationship on potential fishing ground. Chlorophyll-a concentration and SST were derived from Moderate Imaging Spectroradiometer (MODIS) sensors using SeaDAS image processing software. Catch data of skipjack and frigate tuna collected from Lampulo fishing base, Banda Aceh from January 2006 until November 2007. Linier regression was used to analysis relationship between catch perunit effort (CPUE) of fish and oceanographic parameters. The analysis of SST and chlorophyll-a concentration showed the temporal and spatial variations in northern part of Aceh seawaters. Both of Chlorophyll-a concentration and SST have positive relationship on CPUE of skipjack and frigate tuna.Keywords: Mapping, potential fishing ground, skipjack and frigate tuna, North Nanggroe Aceh Darussalam Waters, chlorophyll-a, SST.
RELATIONSHIP CHLOROPHYLL-A CONCENTRATION AND SEA SURFACE TEMPERATURE WITH PRIMARY PELAGIC FISH CATHES IN JAVA SEA FROM MODIS SATELLITE IMAGES Putra, Ega; Gaol, Jonson Lumban; P. Siregar, Vincentius
JURNAL TEKNOLOGI PERIKANAN DAN KELAUTAN Vol 3, No 1 (2012): November 2012
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Abstract

This research aims to study spatial and temporal variation of chlorophyll-a concentration and sea surface temperature as well as his relationship with pelagic fish catches in Java Sea. The results showed in 2006th-2010th sea surface temperaturerice occurs by 1°C which monthly average range between 27,9°C – 31,4°C. Sea surface temperature are relatively higher in transitional seasons compared to west season and east season. Chlorophyll-a concentration in area of research ranging from 0,22 mg/m³- 1,15 mg/m³. Chlorophyll-a concentration value each month fluctuates follow wind of progress. Maximum value of chlorophyll-a concentration happening in wesh season and minimum value occurs in transitional season 2. Layang scad, banyar fish and eastern little tuna has a negative response to sea surface temperature especially in east season. As for sardine fish and fringescalle sardine show absence of a direct relationshop between sea surface temperature with CPUE value catches. Sardine fish and fringescalle sardine show any positive response to rising chlorophyll-a concentration, while for layang scad, banyar fish and eastern little tuna an increase value of chlorophyll-a concentration does not have a direct impact on rising CPUE value of third type of this fish.
ALGORITHMS TO DETECTED SPILL FROM USING MODIS IMAGE Sudibjo, Muhammad; Siregar, Vincentius P.; Gaol, Jonson Lumban
JURNAL TEKNOLOGI PERIKANAN DAN KELAUTAN Vol 4, No 1 (2013): Mei 2013
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Abstract

The Oil spill in Timor Sea in 2009 has spread the oil to the area of 10.842.81 km2. It was successfully detected by MODIS. The main purposes of this research were to compare the detection result of spill from several algorithms with image by using MODIS image and see the visual difference generated. There were four algorithm used in this research, namely: Oil Spill Index, Fluorescence Index, Principal Component Analysis (PCA), and Normalized Difference Vegetation Index (NDVI). These five algorithms resulted in the following comparisons: the appearance of visualization of oil spill seen on MODIS image with oil spill index and fluorescence index algorithm was brighter than the surrounding water bodies and they had higher pixel value. Mean while, oil visualization using PCA and NDVI algorithm was darker than the surrounding of water bodies and they had lower pixel value. The result of the test accuracy of oil spill index, fluorescence index, PCA, NDVI algorithm were 41%, 46%, 41%, and 60% respectivety.
COASTAL UPWELLING UNDER THE INFLUENCE OF WESTERLY WIND BURST IN THE NORTH OF PAPUA CONTINENT, WESTERN PACIFIC Waas, Harold J.D.; Siregar, Vincentius P; Jaya, Indra; Gaol, Jonson Lumban
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 9, No 2 (2012)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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Abstract

Coastal upwelling play an important role in biological productivity and the carbon cycle in the ocean. This research aimed to examine the phenomenon of coastal upwelling that occur in the coastal waters north of Papua continent under the influence of Westerly Wind Burst(WWB) prior to the development of El Nino in the Pacific. Data consisted of sea surface temperature, vertical oceanic temperature, ocean color satellite image, wind stress and vector wind speed image, sea surface high, and Nino 3.4 index. Coastal upwelling events in the northern coastal waters of Papua continent occurred in response to westerly winds and westerly wind burst (WWBs) during December to March characterizing by low sea surface temperature (SST) (25 - 28C), negative sea surface high deviation and phytoplankton blooming, except during pre-development of the El Nino 2006/2007 where weak upwelling followed by positive sea surface high deviation. Strong coastal upwelling occurred during two WWBs in December and March1996/1997 with maximum wind speed in March produced a strong El Nino 1997/1998. Upwelling generally occurred along coastal waters of Jayapura to Papua New Guinea with more intensive in coastal waters north of Papua New Guinea indicated by Ekman transport and Ekman layer depth maximum.
Pemetaan Sumber Daya Laut Pulau Nias dengan Teknologi Penginderaan Jauh Satelit Pasca-Tsunami 2004 Gaol, Jonson Lumban; Arhatin, Risti Endriani; Manurung, Djisman; Kawaru, Mujizat
Jurnal Ilmu Pertanian Indonesia Vol 12, No 3 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Original Source | Check in Google Scholar | Full PDF (424.632 KB)

Abstract

Accurate and up-to-date information of marine resources is needed for optimum resource utilization. If the required information cannot be obtained with traditional field surveys, remote sensing as a tool for providing fast, efficient, and accurate information is used to detect the changes. The study aims to use remote sensing data for assessing distribustion and condition of marine resources in Nias water's before and after tsunami. Marine resources pararameter derived remote sensing data are sea surface temperature (SST), suspended solid matter, chlorphyll-a concentration, coral reef and mangrove distributions. Mapping and differences in coral reef and mangrove distribution were evaluated using two scans of Landsat image in 1989 and 2005. Sea surface temperature was derived from NOAA-AVHRR data, and chlorophyll-a concentration was derived from SeaWiFS data. The study showed that there were no significant changes of coral reef and mangrove distribution, SST, chlorophyll-a concentration after and before tsunami. Spectral analysis of SST and chlorophyll-a showed that the variability of the parameters was affected by monsoon system and global climate change, namely El Nino Southern Oscillation and Indian Ocean Dipole.Keywords: remote sensing, satellite, Nias, tsunami, chorophyll-a, coral reef, mangrove
GROWTH RATE AND PRODUCTIVITY DYNAMICS OF ENHALUS ACOROIDES LEAVES AT THE SEAGRASS ECOSYSTEM IN PARI ISLANDS BASED ON IN SITU AND ALOS SATELLITE DATA Rustam, Agustin; Bengen, Dietriech Geoffrey; Arifin, Zainal; Gaol, Jonson Lumban; Arhatin, Risti Endriani
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 10, No 1 (2013)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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Abstract

Enhalus acoroides is the largest population of seagrasses in Indonesia. However, growth rate  and  productivity  analyses  of Enhalus  acoroides and  the use  of  satellite data to estimate its the productivity are still rare. The goal of the research was to analyze the growth rate, productivity rate,seasonal productivity of Enhalus acoroides in Pari island and its surroundings. The study was divided into two phases i.e., in situ measurments and satellite image processing. The field study was conducted to obtain the coverage percentage, density, growth rate, and productivity rate, while the satellite image processing was used to estimate the extent of seagrass. The study was conducted in August 2011 toJuly  2012  to  accommodate  all  four  seasons. Results  showed  that  the highest  growth  rate  andproductivity occurred during the transitional season from west Monsoon to the east Monsoon of 5.6cm/day  and  15.75  mgC/day, respectively.   While, the  lowest growth rate  and productivity occurred during  the  transition  from east  Monsoon  to  the  west  Monsoon of 3.93  cm/day  and  11.4  mgC/day, respectively. Enhalus  acoroides productivity reached its maximum during  the  west  Monsoon  at 1081.71 mgC/day/m2 and minimum during east Monsoon with 774.85 mgC/day/m2 . Based on ALOS data in 2008 and 2009, total production of Enhalus acoroides in the proximity of Pari islands reached its maximum occur during the west Monsoon (48.73 – 49.59 Ton C) and minimum during transitional season (16.4-16.69 Ton C). Potential atmospheric CO2 absorption by Enhalus acoroides in Pari island was estimated at the number 60.14 – 181.82 Ton C.
VARIATION AND TREND OF SEA LEVEL DERIVED FROM ALTIMETRY SATELLITE AND TIDE GAUGE IN CILACAP AND BENOA COASTAL AREAS Mansawan, Amelius Andi; Gaol, Jonson Lumban; Panjaitan, James P.
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 13, No 1 (2016)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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Abstract

Observation of sea levels continuously is very important in order to adapt the disasters in the coastal areas. Conventionally observations of sea level using tide gauge, but the number of tide gauge installed along the coast of Indonesia is still limited. Altimetry satellite data is one solution; therefore it is necessary to assess the potential and accuracy of altimetry satellite data to complement the sea level data from tide gauges. The study was conducted in the coastal waters of Cilacap and Bali by analysis data Envisat satellite altimetry for period 2003 to 2010 and data compiled from a variety of satellite altimetry from 2006 to 2014. Data tidal was used as a comparison of altimetry satellite data. The altimetry satellite data in Cilacap and Benoa waters more than 90% could be used to assess the variation and the sea level rise during the period 2003-2010. The rate of sea level rise both the data of tidal and satellite altimetry data indicates the same rate was 3.5 mm/year in Cilacap. in Benoa are 4.7 mm/year and 5.60 mm/year respectively.