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National Committee on Marine Sciences (NCMS)

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    Structure of potential upwelling areas in the Philippines
    Udarbe-Walker, Maria Jayvee B.; Villanoy, Cesar L. (Elsevier BV, 2001-06)
    The three-dimensional structure of two potential mesoscale upwelling areas that are located in the external waters of the Philippine archipelago (i.e. northwest of Luzon and east of Mindanao) were constructed by analysis of historical data. A unique characteristic of both upwelling sites is that they can be identified by their anomalously cold subsurface temperatures rather than sea surface temperature distributions. As such, they cannot be observed in sea surface temperature fields derived by satellite imagery. The data used in the analysis were obtained from the National Oceanographic Data Center hydrographic database. Objective analysis was performed to produce monthly temperature fields at several standard depths within the upper 500 m of the region 0–30°N and 100–140°E with a horizontal grid resolution of 0.5°. The extent and timing of these upwelling areas are described. A review of existing hypothesis on the mechanisms for their evolution and seasonal modulation are presented. The change in heat content during the upwelling season is greater than 300 W m−2 in both areas. Based on the excursion of isotherms, vertical velocities of 83 cm day−1 and 26 cm day−1 were obtained for upwelling northwest of Luzon and east of Mindanao, respectively.
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    New horizons for naval oceanography
    Dacanay, Rafael V.; Reyes, Rolando (Philippine Council for Aquatic and Marine Research and Development, 2002)
    Naval oceanography is a crucial field that extends beyond the traditional study of the sea, focusing on the investigation of all physical phenomena that influence naval operations. It encompasses the collection, processing, application, and dissemination of information across oceanography, hydrography, and meteorology. This discipline plays an essential role in daily naval operations and is increasingly vital for the effective performance of modern naval weapon systems. Oceanographic factors, including bioluminescence, internal waves, and shadow zones, have significant impacts on naval activities. Historical events, such as the bombing of Pearl Harbor and the Normandy invasion, underscore the critical influence of oceanographic knowledge in naval history. The Philippine Navy has established the Naval Oceanographic and Meteorological Unit (NOMU) to manage oceanographic, hydrographic, and meteorological activities, supporting fleet operations and contributing to the development of marine science in the country.
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    Ocean mapping and other marine activities of the National Mapping and Resource Information Authority (NAMRIA)
    Carandang, Efren P. (Philippine Council for Aquatic and Marine Research and Development, 2002)
    This paper describes the various marine activities being undertaken by the National Mapping and Resource Information Authority (NAMRIA) pursuant to its mandate as the central surveying, mapping and resource information agency of the government. NAMRIA gathers marine data through periodic hydrographic and oceanographic surveys and remote sensing techniques, and publishes the results in the form of nautical charts, bathymetric maps and other thematic maps. It also creates marine geographic information systems and databases. As steward of the National Oceanographic Data Center (NODC), the agency participates in international oceanographic data exchange programs, and also serves the marine data and information needs of the local marine science community. NAMRIA's data collection capability got a big boost with the acquisition this year of two multi-disciplinary survey vessels with state-of-the-art systems. With these vessels as platforms, NAMRIA will embark on the comprehensive charting of the Exclusive Economic Zone, and collaborate with the different marine science agencies in the conduct of multi-disciplinary oceanographic cruises.