Results of Oceanographic Observations taken by CTD in North Pacific Areas under National Jurisdiction of the United States of America from the R/V Keifu Maru, Cruise No. KS25-01, from 2025-01-25 to 2025-01-26 (NCEI Accession 0311482)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 05:16 AM | Dataset Last Updated: January 20, 2026 at 12:00 AM

KS25-01 cruise was conducted by the Japan Meteorological Agency's research vessel "Keifu Maru" from January to February, 2025. This dataset reports the results of marine observations conducted within the exclusive economic zone (EEZ) of the United States (Wake Atoll National Wildlife Refuge) during this voyage. The major objectives of the cruise are to monitor ocean conditions in the western North Pacific on a seasonal basis. During the cruise, vertical profiles of seawater temperature, salinity, dissolved oxygen, nutrients were observed. As a method of Hydrographic observation, vertical distributions of seawater temperature and salinity were measured using a CTD (Conductivity-Temperature-Depth profiler), and chemical analysis was performed on seawater samples collected by the CTD's multi-bottle sampler. This dataset is the U.S. State Department MSR RATS U2024-016. Data are in TXT and CSV formats.

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accessLevel	non-public
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description	KS25-01 cruise was conducted by the Japan Meteorological Agency's research vessel "Keifu Maru" from January to February, 2025. This dataset reports the results of marine observations conducted within the exclusive economic zone (EEZ) of the United States (Wake Atoll National Wildlife Refuge) during this voyage. The major objectives of the cruise are to monitor ocean conditions in the western North Pacific on a seasonal basis. During the cruise, vertical profiles of seawater temperature, salinity, dissolved oxygen, nutrients were observed. As a method of Hydrographic observation, vertical distributions of seawater temperature and salinity were measured using a CTD (Conductivity-Temperature-Depth profiler), and chemical analysis was performed on seawater samples collected by the CTD's multi-bottle sampler. This dataset is the U.S. State Department MSR RATS U2024-016. Data are in TXT and CSV formats.
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identifier	https://data.noaa.gov/waf/NOAA/NESDIS/ncei/accessions/iso/xml/0311482.xml
issued	2026-01-12T00:00:00.000+00:00
keyword	[ "0311482", "DISSOLVED OXYGEN", "nitrate + nitrite content (concentration)", "NITROGEN", "SALINITY", "silicate", "WATER TEMPERATURE", "CTD", "laboratory analysis", "Niskin bottle", "chemical", "in situ", "physical", "profile", "KEIFU MARU", "Japan Meteorological Agency", "Japan Meteorological Agency", "U. S. Department of State Marine Scientific Research (MSR)", "North Pacific Ocean", "Pacific Remote Islands Marine National Monument", "oceanography", "JP/JMA > Japan Meteorological Agency, Japan", "MSR > U.S. Department of State Marine Scientific Research", "KS25-01 Cruise", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITROGEN", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN", "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE", "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE", "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY", "(Nitrate+nitrite)-nitrogen", "CTD depth of STD. in meters", "CTD depth of sampling in meters", "CTD salinity STD. in PSS-78", "CTD salinity in PSS-78", "CTD temperature STD. in ITS-90", "CTD temperature in ITS-90", "Dissolved oxygen STD.", "Geopotential anomaly", "Hydrogen-ion", "Inorganic phosphate-phosphorus", "Nitrite-nitrogen", "Thermosteric anomaly", "CTD > Conductivity, Temperature, Depth", "NISKIN BOTTLES", "CTD,Multi-Niskin bottle sampler", "Ships", "KEIFU MARU (call sign: JPBN, ICES code: 49UF, 2000-)", "R/V Keifu Maru", "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN", "Northwest Pacific Ocean,Wake Atoll N.W.R", "MFML3U" ]
landingPage	https://www.ncei.noaa.gov/contact
language	[]
license	https://creativecommons.org/publicdomain/zero/1.0/
modified	2026-01-20T00:00:00.000+00:00
publisher	{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" }
references	[ "https://www.jma.go.jp/jma/en/Activities/cc.html" ]
rights	otherRestrictions
spatial	165.0,16.98333,164.98333,22.0
temporal	2025-01-25T00:00:00+00:00/2025-01-26T00:00:00+00:00
theme	[ "geospatial" ]
title	Results of Oceanographic Observations taken by CTD in North Pacific Areas under National Jurisdiction of the United States of America from the R/V Keifu Maru, Cruise No. KS25-01, from 2025-01-25 to 2025-01-26 (NCEI Accession 0311482)

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