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Marine Research in Indonesia

MRI
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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : 02162873 EISSN : 24432008 DOI : -

Core Subject : Science,

Earth & Planetary Sciences

MARINE RESEARCH IN INDONESIA (MRI) has been published since 1956 by Indonesia's oldest marine research institute, the Research Center for Oceanography of LIPI (Indonesian Institute of Sciences). MRI focuses on physical, chemical, biological, geological oceanographic as well as coastal management studies in the Indonesian seas and the adjacent Indo-Pacific region.

Arjuna Subject : -

Articles 567 Documents

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SUBMARINE GROUNDWATER DISCHARGE MEASUREMENT ON THE SANDY UNCONFINED AQUIFER AT THE CARNAVAL BEACH, ANCOL (JAKARTA BAY) Bakti, Hendra; Lubis, Rachmat Fajar; Delinom, Robert M.; Taniguchi, Makoto
Marine Research in Indonesia Vol 41 No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Submarine groundwater discharge (SGD) is defined as all direct discharge of subsurface fluids into coastal zone. Components of SGD consist of fresh submarine groundwater discharge and the recirculated saline seawater discharge. SGD could act as a pathway for the transport of anthropogenic contaminants and nutrients to coastal waters. Measurement SGD at Carnaval Beach, Ancol, Jakarta was focussed on unconfined groundwater system. The method of quantified used automatic seepage meter for measured of SGD and installed conductivity temperature depth. The average SGD rate was 0.21 mm/min on March 20-31, 2009 consist of 19.05% fresh water, 80.95% recirculated seawater. April 1-23, 2009, the average SGD rate was 0.81 ml/min which consisted of 16.04% fresh water, 83.96% recirculated seawater. SGD fluctuation was opposite with the tide. As a result, submarine groundwater discharge at Jakarta coastal area was defined and can be measured to quantify.

SPECTROPHOTOMETRY ANALYSIS OF DEEP-SEA SEDIMENTS ALONG THE MAIN PATHYWAY OF THE INDONESIAN THROUGHFLOW: SPATIAL VIEW Nurhati, Intan Suci
Marine Research in Indonesia Vol 41 No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Deep-sea sediment is the primary marine archive for reconstructing climate of the past millennia. With an array of geochemical analyses and more techniques to be developed, conservative sample usage is necessary. This study presents spectrophotometry analysis as a non-intrusive approach on deep-sea sediment samples retrieved along the main pathway of the Indonesian Throughflow in the Makassar Strait. Sediments from 25 sites including: Eastern Kalimantan, western Sulawesi, south Makassar Strait, southern Sulawesi and northern Bali are scanned as wet and dried samples over the visible spectra (400-700nm). After taking first derivatives of the raw data to accentuate the signals, R-mode factor analysis is applied to reveal three factors that explain 96.99% variance. Factor 1, which explains 53.94% variance, is characterized as halite. Factor 2 (30.89%) is carbonate and Factor 3 (12.18%) is kaolinite or clay mineral. XRD analysis reveals the presence of calcite, quartz, halite, plagioclase and aragonite, with the first three being the most prevalent minerals. Spatial distribution map of Factor 1 (halite) shows higher values in eastern Kalimantan, south Makassar Strait and western Sulawesi. Factor 2 (carbonate) is relatively high in eastern Kalimantan, southern Sulawesi and northern Bali; with similar observation at the first two sites from accompanying carbonate content analysis. Relatively high Factor 3 (kaolinite) in eastern Kalimantan is consistent with its proximity to the Mahakam River delta. Characteristics of each region are further discussed herein. Taken together, this information lays a foundation for applying the non-intrusive spectrophotometry downcore to study past climate change in the Makassar Strait.

ASSESSING CONTAMINATION LEVEL OF JAKARTA BAY NEARSHORE SEDIMENTS USING GREEN MUSSEL (PERNA VIRIDIS) LARVAE Cordova, Muhammad Reza; Purbonegoro, Triyoni; Puspitasari, Rachma; Hindarti, Dwi
Marine Research in Indonesia Vol 41 No 2 (2016)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Indication of accumulation of heavy metal in sediments will lead to problem for shore and sea ecosystems, biota living in that area and human?s health. The research is aiming to analyse the toxicity of sediment from thirty one locations in Jakarta Bay using Perna Viridis. High amount in larval abnormality found in sediments from the area near mainland and estuary are an indication of high influence of waste from anthropogenic activities from Jakarta mainland. These areas are down stream of Cengkareng Drain, Kamal River, Grogol River and Cakung River, area around sea transportation and North Jakarta Integrated Industrial Area. Sediment of Jakarta Bay, especially coming from estuary area and near to the land area causes an increase in green mussel larval abnormality. This indicates the high of waste influence from anthropogenic activity from Jakarta land area.

SEASONAL FLUCTUATIONS IN THE SURFACE SALINITY OFF THE NORTH COAST OF JAVA Soeriaatmadja, Raden E.
Marine Research in Indonesia Vol 1 (1956)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The division of the region investigated according to P. CH. VEEN is redescribed. The micro salinity titration by means of the method described by G. H. ARNOLD with an accuracy of 0.1 ? was used for this investigation. This technique was adopted because of the large number of observations, and was sufficiently accurate since salinity in these waters varies widely. The annual range in salinity is large, caused by a considerable discharge of fresh water from the many big and small rivers, especially in the rainy-season as well as by the inequality of salinity of the oceanwaters coming from the East, and the South China Sea water coming from the West, during the dry and wet-sason respectively. In the east-monsoon, the eastern section is covered with ocean water over 34.0 ? and the western section with mixed waters ranging between 31.5 ? and 34.0 ?, while in the west-monsoon, the area is covered with mixed water less than 32.5 ?.

THE SUBTROPICAL LOWER WATER BETWEEN THE PHILIPPINES AND IRIAN (NEW GUINEA) Wyrtki, Klaus
Marine Research in Indonesia Vol 1 (1956)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Oceanographic observations are published, taken by the research vessel Siboela in 1949 at 57 stations in the Celebes Sea and around Halmahera. Basing on these observations, an analysis is made of the Subtropical Lower Water (salinity-Maximum) in this region and is compared with the observations of the Snellius and the Dana in 1929. The distribution of the oxygen content allows a distinction of the Lower Water into a northern and a southern water type, which regions of origion are situated in 23°N between 165°E and 165°W and in 15°S between 120° and 150°W respectively. It is shown that the temperature of the salinity maximum in 1949 is 1.4° higher and the salinity 0.11? lower than in 1929. The topography of the salinity maximum, which lies in about 100 to 200 m, is closely correlated with the surface currents.

THE COMPUTATION OF OCEANIC AND METEOROLOGICAL FIELDS OF MOTION WITH FRICTION PROPORTIONAL TO THE VELOCITY Wyrtki, Klaus
Marine Research in Indonesia Vol 2 (1956)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The friction in the hydrodynamical differential equations is taken proportional to the velocity. With it simple relations result, permitting the calculation of the mass transport, without the need to solve differential equations, if the wind and pressure distributions are known. The solution can cross the equator freely. Simultaneously the equations give the vertical components of motion at the lower boundary of the layer under consideration. Numerical values of the friction coefficient are given, and oceanographical and meteorological models are discussed, as for instance the monsoon winds over Southeast Asia, the monsoon currents in the Java and China Seas and the equatorial currents of the Pacific Ocean.

SURFACE SALINITIES IN THE STRAIT OF MALACCA Soeriaatmadja, Raden E.
Marine Research in Indonesia Vol 2 (1956)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

A continuous northwest-going current prevails in the Strait of Malacca throughout the year, except June and August, when the currents are very weak and sometimes reversed in the .southern part. The southern part of the Strait of Malacca is influenced by the currents. These currents transport low saline water into the Strait during the southwest monsoon and high saline water from the South China Sea during the northeast monsoon. In the northern part, the rainfall is of greater importance for the variations of the surface salinity and a strong correlation between rainfall and surface salinities is found in this region. It is unlikely that Indian Ocean water penetrates the South China Sea.

BATHYMETRICAL FEATURES OF THE BALI-LOMBOK STRAIT Bruun, Anton F.; Kiilerich, A.
Marine Research in Indonesia Vol 3 (1957)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The full understanding of the distributio of the surface temperature and salinity requires the knowledge of the heat and water balance at the surface of the ocean as well as of the circulation. For southeast Asian waters the monthly averages of the climatological factors determining the heat and water balance are calculated and presented in the following for 15 regions.

PRECIPITATION, EVAPORATION AND ENERGY EXCHANGE AT THE SURFACE OF THE SOUTHEAST ASIAN WATERS Wyrtki, Klaus
Marine Research in Indonesia Vol 3 (1957)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

None provided.

THE COASTAL CURRENT SOUTH OF JAVA Soeriaatmadja, Raden E.
Marine Research in Indonesia Vol 3 (1957)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

This paper concerns investigations of the hydrography of the waters south of Java, especially of the Java Coastal Current, which have been carried out by the Institute of Marine Research at Djakarta. It is based on (1) oceanographic observations made by the research vessel "SAMUDERA" in February 1957, (2) the surface salinity data of the years 1949?1955, consisting of about 700 observations which were collected by the Institute of Marine Research at Djakarta, and (3) the surface current data obtained from the Atlas of Oceanographic and Meteorological data of the Koninklijk Nederlands Meteorologisch Instituut.

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Aan J. Wahyudi

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Kota adm. jakarta selatan,

Dki jakarta

INDONESIA