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Transparency (secchi depth) time series at monitoring site TEPAST in the Southeastern Indian Ocean, Indonesia (2021-2024)

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Bibliographic Details
Title: Transparency (secchi depth) time series at monitoring site TEPAST in the Southeastern Indian Ocean, Indonesia (2021-2024)
Authors: Purba, Noir Primadona, Faizal, Ibnu, Dewanti, Lantun Paradhita
Publisher Information: PANGAEA
Publication Year: 2025
Collection: PANGAEA - Data Publisher for Earth & Environmental Science (AWI Bremerhaven / MARUM Bremen)
Subject Terms: A global study of coastal Deoxygenation, Ocean Acidification and Productivity at selected sites, Coastal, data, DATE/TIME, Depth of Secchi Disk, Event label, Indian Ocean, Indonesian Seas, Institution, LATITUDE, LONGITUDE, Method comment, MULT, Multiple investigations, NANO-DOAP, NF-POGO, off Java, ORDINAL NUMBER, Project, Sea surface temperature, Secchi disc, Station label, TEPAST_2109_1, TEPAST_2110_1, TEPAST_2111_1, TEPAST_2112_1, TEPAST_2201_1, TEPAST_2202_1, TEPAST_2203_1
Subject Geographic: MEDIAN LATITUDE: -7.716436 * MEDIAN LONGITUDE: 108.511656 * SOUTH-BOUND LATITUDE: -7.718404 * WEST-BOUND LONGITUDE: 108.508380 * NORTH-BOUND LATITUDE: -7.715501 * EAST-BOUND LONGITUDE: 108.514869 * DATE/TIME START: 2021-09-19T10:20:00 * DATE/TIME END: 2024-08-20T10:47:00 * MINIMUM ORDINAL NUMBER: 1 * MAXIMUM ORDINAL NUMBER: 152
Description: In 2021, the TEPAST monitoring site was established to monitor the coastal conditions on the southeastern coast of Java, Indonesia. Six key variables - pH, temperature, chlorophyll-a, salinity, dissolved oxygen, and water transparency - are measured monthly using advanced scientific instruments. Over 36 months of measurements, 1488 samples were collected. The measured parameters were validated through monthly calibrations and statistical checks, with the distribution of each parameter assessed using histograms of the sampling data. Sampling at the TEPAST study site is conducted monthly, typically between the 15th and 20th of each month, from 7:00 to 10:00 local time (UTC+7). Morning hours are chosen to take advantage of generally calm water conditions, minimizing the influence of wind and waves on the data collection process. The TEPAST COD dataset includes two types of observations: (1) in-situ measurements obtained from three fixed locations over 36 months (September 2021 to August 2024) with measurements continuing, and (2) laboratory analysis of water samples to determine salinity and chlorophyll-a concentrations. In-situ measurements are performed at three depth layers: surface (0 m), 10 m, and 20 m. All instruments adhere to standard measurement protocols and are regularly recalibrated before use. The same individual conducted all measurements throughout the study to ensure consistency and minimize uncertainties. Seawater samples (1.5 L) were collected from each station and specific depth layer using a 3 L Nansen bottle for Chlorophyll-a analysis. The samples were immediately placed in cold storage on the boat and transferred to a dark -20°C freezer at the laboratory within one hour of collection.
Document Type: dataset
File Description: text/tab-separated-values, 760 data points
Language: English
Relation: Purba, Noir Primadona; Faid, Ghelby Muhammad; Zheng, Wang; Faizal, Ibnu; Akhir, Mohd. Fadzil; Yu, Weidong; Mulya, Rangga Adithya; Syamsudin, Fadli; Pasaribu, Buntora; Agustiadi, Teguh; Priyono, Bayu; Fadli, Muhammad; Santoso, Priyadi Dwi; Pandoe, Wahyu Widodo; Wang, Huiwu; Li, Shujiang; Wei, Zexun; Susanto, R Dwi; Nugroho, Dwiyoga; Purwandana, Adi (preprint): Two Centuries of Oceanographic Data in the Indonesian Seas and Surroundings: Historical Trends, Gaps, and Future Challenges. https://doi.org/10.5194/essd-2025-196; https://doi.pangaea.de/10.1594/PANGAEA.977628
DOI: 10.1594/PANGAEA.977628
Availability: https://doi.pangaea.de/10.1594/PANGAEA.977628
Rights: CC-BY-4.0: Creative Commons Attribution 4.0 International ; Access constraints: unrestricted ; info:eu-repo/semantics/openAccess
Accession Number: edsbas.9FC43299
Database: BASE
Description
Abstract:In 2021, the TEPAST monitoring site was established to monitor the coastal conditions on the southeastern coast of Java, Indonesia. Six key variables - pH, temperature, chlorophyll-a, salinity, dissolved oxygen, and water transparency - are measured monthly using advanced scientific instruments. Over 36 months of measurements, 1488 samples were collected. The measured parameters were validated through monthly calibrations and statistical checks, with the distribution of each parameter assessed using histograms of the sampling data. Sampling at the TEPAST study site is conducted monthly, typically between the 15th and 20th of each month, from 7:00 to 10:00 local time (UTC+7). Morning hours are chosen to take advantage of generally calm water conditions, minimizing the influence of wind and waves on the data collection process. The TEPAST COD dataset includes two types of observations: (1) in-situ measurements obtained from three fixed locations over 36 months (September 2021 to August 2024) with measurements continuing, and (2) laboratory analysis of water samples to determine salinity and chlorophyll-a concentrations. In-situ measurements are performed at three depth layers: surface (0 m), 10 m, and 20 m. All instruments adhere to standard measurement protocols and are regularly recalibrated before use. The same individual conducted all measurements throughout the study to ensure consistency and minimize uncertainties. Seawater samples (1.5 L) were collected from each station and specific depth layer using a 3 L Nansen bottle for Chlorophyll-a analysis. The samples were immediately placed in cold storage on the boat and transferred to a dark -20°C freezer at the laboratory within one hour of collection.
DOI:10.1594/PANGAEA.977628