scholarly journals Tekanan Bawah Laut (Pressure) Untuk Web Database Fusi Oseanografi

2021 ◽  
Vol 7 (1) ◽  
pp. 1-10
Author(s):  
Abdul Wahid ◽  
Widodo S. Pranowo ◽  
Arta Adhi Surya ◽  
Nawanto Budi Sukoco ◽  
Dian Adrianto ◽  
...  
Keyword(s):  
World Ocean ◽  
Pressure Data ◽  
Web Database ◽  
World Ocean Atlas

Permasalahan kondisi laut sangatlah dinamis. Namun dinamika ini umumnya memiliki pola bulanan dan tahunan. Sehingga tugas akhir ini akan menghitung dan menampilkan karakteristik bulanan dan tahunan dari variabel Pressure. Data eksperimen yang digunakan bersumber dari World Ocean Atlas (WOA) 2013 parameter temperature, salinity dan kedalaman, yang kemudian digunakan untuk komputasi perhitungan menghasilkan variabel Pressure. Data WOA 2013 adalah data klimatologis dari 1955- 2012 (57 tahun), dengan asumsi mewakili kondisi laut normal tanpa dipengaruhi oleh ENSO dan IOD. Namun sangat dipengaruhi dengan waktu dan kedalaman dari perairan tertentu. Diharapkan penelitian ini dapat memberikan solusi untuk Pushidrosal akan keterbatasan tentang data oseanografi dengan variabel Pressure yang disajikan dalam Purwarupa Fusi Oseanografi untuk mendukung keperluan sektor maritim maupun sektor hankam.

scholarly journals Springtime Upwelling and Its Formation Mechanism in Coastal Waters of Manaung Island, Myanmar

2020 ◽  
Vol 12 (22) ◽  
pp. 3777
Author(s):  
Yuhui Li ◽  
Yun Qiu ◽  
Jianyu Hu ◽  
Cherry Aung ◽  
Xinyu Lin ◽  
...  
Keyword(s):  
Surface Layer ◽  
Satellite Remote Sensing ◽  
Subsurface Layer ◽  
World Ocean ◽  
Remote Sensing Data ◽  
Remote Forcing ◽  
Forcing Mechanisms ◽  
World Ocean Atlas ◽  
The Impact ◽  
Local Wind Forcing

Multisource satellite remote sensing data and the World Ocean Atlas 2018 (WOA18) temperature and salinity dataset have been used to analyze the spatial distribution, variability and possible forcing mechanisms of the upwelling off Manaung Island, Myanmar. Signals of upwelling exist off the coasts of Manaung Island, in western Myanmar during spring. It appears in February, reaches its peak in March and decays in May. Low-temperature (<28.3 °C) and high-salinity (>31.8 psu) water at the surface of this upwelling zone is caused by the upwelling of seawater from a depth below 100 m. The impact of the upwelling on temperature is more significant in the subsurface layer than that in the surface layer. In contrast, the impact of the upwelling on salinity in the surface layer is more significant. Further research reveals that the remote forcing from the equator predominantly induces the evolution of the upwelling, while the local wind forcing also contributes to strengthen the intensity of the upwelling during spring.

Monthly Water Exchange through the Ryukyu Islands Revealed by Salinity Structural Changes

2013 ◽  
Vol 864-867 ◽  
pp. 2335-2339
Author(s):  
Ya Pan Liu ◽  
Jian Cheng Kang ◽  
Jiong Zhu ◽  
Qin Chen Han
Keyword(s):  
Structural Changes ◽  
Water Exchange ◽  
High Salinity ◽  
World Ocean ◽  
Core Layer ◽  
Ryukyu Islands ◽  
High Salinity Water ◽  
The Ryukyu Islands ◽  
Salinity Water ◽  
World Ocean Atlas

Using salinity database of World Ocean Atlas 2009 (WOA09) issued by NOAA in 2010, refer the range of high-salinity tongue to indicate the strength about high-salinity water, from the perspective of structural changes of salinity; the water exchange through Ryukyu Islands upper 500 m have been analyzed, the results show that: due to Ryukyu Trough, currents on both sides of Ryukyu Islands occur exchange, for upper 500 m, high-salinity water in east of the Ryukyu Islands mainly invade the west waterthe Kuroshio in East China Sea; the intrusion strength is powerful from the depth of 100 m to 200 m, and the 150 m layer is the core layer of high-salinity water intrusion; the high-salinity water at the east of Ryukyu Islands invades the Kuroshio are stronger in March, May, June, September, October and November, are weaker in April and December.

scholarly journals A Comparison Between the World Ocean Atlas and Hydrobase Climatology

2000 ◽  
Vol 27 (8) ◽  
pp. 1191-1194 ◽  
Author(s):  
C. -W. June Chang ◽  
Yi Chao
Keyword(s):  
World Ocean ◽  
The World ◽  
World Ocean Atlas

scholarly journals MAREDAT: towards a World Ocean Atlas of MARine Ecosystem DATa

2012 ◽  
Vol 5 (2) ◽  
pp. 1077-1106 ◽  
Author(s):  
E. T. Buitenhuis ◽  
M. Vogt ◽  
R. Moriarty ◽  
N. Bednaršek ◽  
S. C. Doney ◽  
...  
Keyword(s):  
Marine Ecosystem ◽  
World Ocean ◽  
Zooplankton Biomass ◽  
Global Ocean ◽  
Special Issue ◽  
Biomass Distribution ◽  
Phytoplankton Pigment ◽  
Autotrophic Biomass ◽  
Ocean Ecosystem ◽  
World Ocean Atlas

Abstract. We present a summary of biomass data for 11 Plankton Functional Types (PFTs) plus phytoplankton pigment data, compiled as part of the MARine Ecosystem biomass DATa (MAREDAT) initiative. The goal of the MAREDAT initiative is to provide global gridded data products with coverage of all biological components of the global ocean ecosystem. This special issue is the first step towards achieving this. The PFTs presented here include picophytoplankton, diazotrophs, coccolithophores, Phaeocystis, diatoms, picoheterotrophs, microzooplankton, foraminifers, mesozooplankton, pteropods and macrozooplankton. All variables have been gridded onto a World Ocean Atlas (WOA) grid (1° × 1° × 33 vertical levels × monthly climatologies). The data show that (1) the global total heterotrophic biomass (2.0–6.4 Pg C) is at least as high as the total autotrophic biomass (0.5–2.6 Pg C excluding nanophytoplankton and autotrophic dinoflagellates), (2) the biomass of zooplankton calcifiers (0.9–2.3 Pg C) is substantially higher than that of coccolithophores (0.01–0.14 Pg C), (3) patchiness of biomass distribution increases with organism size, and (4) although zooplankton biomass measurements below 200 m are rare, the limited measurements available suggest that Bacteria and Archaea are not the only heterotrophs in the deep sea. More data will be needed to characterize ocean ecosystem functioning and associated biogeochemistry in the Southern Hemisphere and below 200 m. Microzooplankton database: doi:10.1594/PANGAEA.779970.

scholarly journals POTENSI PANAS LAUT SEBAGAI ENERGI BARU TERBARUKAN DI PERAIRAN PAPUA BARAT DENGAN METODE OCEAN THERMAL ENERGY CONVERSION (OTEC)

2019 ◽  
Vol 6 (2) ◽  
pp. 7-14
Author(s):  
Erlita Aprilia ◽  
Althaf Aini ◽  
Ayu Frakusya ◽  
Agus Safril
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
World Ocean ◽  
Ocean Thermal Energy Conversion ◽  
Thermal Energy Conversion ◽  
Papua Barat ◽  
World Ocean Atlas ◽  
Ocean Thermal Energy ◽  
Data View

Energi listrik merupakan suatu hal yang sangat dibutuhkan dalam keberlangsungan kehidupan manusia. Kebutuhan akan energi listrik yang semakin meningkat dari waktu ke waktu memerlukan inovasi baru untuk menghasilkan energi listrik yang ramah lingkungan. Ocean Thermal Energy Conversion (OTEC) adalah metode untuk menghasilkan energi listrik menggunakan prinsip perbedaan temperatur antara laut dalam dan permukaan dengan selisih temperatur minimal sebesar 20C untuk menjalankan mesin kalor. Papua Barat merupakan salah satu provinsi di Indonesia dengan elektrifikasi yang masih rendah. Letak Indonesia yang berada di wilayah tropis dengan perbedaan suhu air laut yang tinggi memiliki potensi untuk memanfaatkan metode OTEC dalam menghasilkan energi listrik. Penelitian ini bertujuan untuk mengetahui potensi pemanfaatan OTEC di perairan sekitar Papua Barat. Data yang digunakan adalah data suhu air laut dalam dan permukaan periode tahun 1955 – 2012 di dua belas titik di perairan sekitar Papua Barat. Data tersebut diperoleh dari World Ocean Atlas 2013 yang kemudian diolah menggunakan perangkat lunak olah data dan Ocean Data View (ODV). Hasil olah data didapatkan nilai efisiensi terbesar yaitu 7,67% dan terkecil yaitu 7,21%.

scholarly journals Baroclinic Modes over Rough Bathymetry and the Surface Deformation Radius

2020 ◽  
Vol 50 (10) ◽  
pp. 2835-2847 ◽  
Author(s):  
J. H. LaCasce ◽  
Sjoerd Groeskamp
Keyword(s):  
Wave Speed ◽  
Surface Deformation ◽  
World Ocean ◽  
Surface Mode ◽  
Ocean Bottom ◽  
Baroclinic Mode ◽  
Flat Bottom ◽  
Two Layer Model ◽  
World Ocean Atlas ◽  
Baroclinic Modes

AbstractThe deformation radius is widely used as an indication of the eddy length scale at different latitudes. The radius is usually calculated assuming a flat ocean bottom. However, bathymetry alters the baroclinic modes and hence their deformation radii. In a linear quasigeostrophic two-layer model with realistic parameters, the deep flow for a 100-km wave approaches zero with a bottom ridge roughly 10 m high, leaving a baroclinic mode that is mostly surface trapped. This is in line with published current meter studies showing a primary EOF that is surface intensified and has nearly zero flow at the bottom. The deformation radius associated with this “surface mode” is significantly larger than that of the flat bottom baroclinic mode. Using World Ocean Atlas data, the surface radius is found to be 20%–50% larger over much of the globe, and 100% larger in some regions. This in turn alters the long Rossby wave speed, which is shown to be 1.5–2 times faster than over a flat bottom. In addition, the larger deformation radius is easier to resolve in ocean models.

СРАВНЕНИЕ РЕЗУЛЬТАТОВ НАБЛЮДЕНИЙ, ВЫПОЛНЕННЫХ В БАРЕНЦЕВОМ МОРЕ, С ДАННЫМИ ИЗ ГЛОБАЛЬНЫХ ОКЕАНОЛОГИЧЕСКИХ БАЗ, "Фундаментальная и прикладная гидрофизика"

2020 ◽  
pp. 66-77
Author(s):  
А.В. Зимин ◽  
О.А. Атаджанова ◽  
А. А. Коник ◽  
С.М. Гордеева
Keyword(s):  
World Ocean ◽  
World Ocean Atlas

Приведены результаты количественного сравнения полей температуры и солености, полученные по результатам океанографических судовых измерений, с данными из глобальных океанологических баз. Измерения выполнялись на полигоне с регулярным расположением океанографических станций в юго-западной части Баренцева моря с 29.10.2018 по 02.11.2018 г. в рамках 74-го рейса на НИС «Академик Мстислав Келдыш». Для сравнения привлекались продукты MERCATOR PSY4QV3R1, CMEMS GLORYS12v1, World Ocean Atlas 2013, GHRSST OSTIA и данные Suomi NNP VIIRS на горизонтах от 0 до 100 метров. Проводились сравнения по средним и дисперсиям; относительно данных наблюдений оценивались: аномалия, пространственная корреляция и функция расхождения; для выбранных изолиний рассчитывалось модифицированное расстояние Хаусдорфа. Сравнения результатов судовых наблюдений и продуктов показали, что в последних отсутствуют наборы данных, достоверно описывающие термохалинные характеристики всей водной толщи на акватории Баренцева моря в осенний период времени. Основные различия проявляются в описании распределения температуры, а поля солености воспроизводятся в целом лучше. Наилучшее соответствие результатам измерений отмечено у продукта GHRSST OSTIA, описывающего только поверхностную температуру океана. Проведенный анализ свидетельствует о том, что при описании изменчивости гидрологических условий в арктических морях еще рано полностью опираться на данные глобальных продуктов, несмотря на их пространственный охват и регулярность обновления.

scholarly journals Distributions of mixed layer properties in North Pacific water mass formation areas: comparison of Argo floats and World Ocean Atlas 2001

Ocean Science ◽  
2006 ◽  
Vol 2 (1) ◽  
pp. 61-70 ◽  
Author(s):  
F. M. Bingham ◽  
T. Suga
Keyword(s):  
Mixed Layer ◽  
North Pacific ◽  
World Ocean ◽  
Water Masses ◽  
Mode Water ◽  
The North ◽  
Central Mode Water ◽  
Central Mode ◽  
World Ocean Atlas ◽  
The North Pacific

Abstract. Winter mixed layer characteristics in the North Pacific Ocean are examined and compared between Argo floats in 2006 and the World Ocean Atlas 2001 (WOA01) climatology for a series of named water masses, North Pacific Tropical Water (NPTW), Eastern Subtropical Mode Water (ESTMW), North Pacific Subtropical Mode Water (NPSTMW), Light Central Mode Water (LCMW) and Dense Central Mode Water (DCMW). The WOA01 is found to be in good agreement with the Argo data in terms of water mass volumes, average temperature-salinity (T-S) properties, and outcrop areas. The exception to this conclusion is for the central mode waters, DCMW and LCMW, whose outcropping is shown to be much more intermittent than is apparent in the WOA01 and whose T-S properties vary from what is shown in the WOA01. Distributions of mixed layer T-S properties measured by floats are examined within the outcropping areas defined by the WOA01 and show some shifting of T-S characteristics within the confines of the named water masses. In 2006, all the water masses were warmer than climatology on average, with a magnitude of about 0.5°C. The NPTW, NPSTMW and LCMW were saltier than climatology and the ESTMW and DCMW fresher, with magnitudes of about 0.05. In order to put these results into context, differences between Argo and WOA01 were examined over the North Pacific between 20 and 45° N. A large-scsale warming and freshening is seen throughout this area, except for the western North Pacific, where results were more mixed.

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