A5026812279- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Marine and fisheries research
- Water Quality Monitoring and Analysis
- Atmospheric and Environmental Gas Dynamics
- Ocean Acidification Effects and Responses
- Microbial Community Ecology and Physiology
- Water Quality Monitoring Technologies
- Climate variability and models
- Marine Bivalve and Aquaculture Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal and Marine Management
- Oil Spill Detection and Mitigation
- Methane Hydrates and Related Phenomena
- Air Quality Monitoring and Forecasting
- Marine and environmental studies
- Ocean Waves and Remote Sensing
- Meteorological Phenomena and Simulations
- Remote Sensing and Land Use
- Tropical and Extratropical Cyclones Research
- Coral and Marine Ecosystems Studies
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
Nagoya University
2016-2025
Earth and Space Research
2016-2025
Kyoto University of Advanced Science
2023
ORCID
2021
Nagasaki University
2001-2011
National Institute for Environmental Studies
1991-2000
Texas A&M University
1987-1990
University of Tsukuba
1983-1987
Abstract Eutrophication is an emerging global issue associated with increasing anthropogenic nutrient loading. The impacts and extent of eutrophication are often limited to regions dedicated monitoring programmes. Here we introduce the first Google Earth Engine-based interactive assessment tool coastal potential (CEP). evaluates trends in satellite-derived chlorophyll- a (CHL) devise map CEP. Our analyses suggest that, globally, waters (depth ≤200 m) covering ∼1.15 million km 2 eutrophic...
The performance of 36 models (22 ocean color and 14 biogeochemical circulation (BOGCMs)) that estimate depth‐integrated marine net primary productivity (NPP) was assessed by comparing their output to in situ C data at the Bermuda Atlantic Time series Study (BATS) Hawaii Ocean (HOT) over nearly two decades. Specifically, skill based on models' ability observed mean, variability, trends NPP. At both sites, more than 90% underestimated mean NPP, with average bias BOGCMs being twice models....
Abstract. Nearly half of the earth's photosynthetically fixed carbon derives from oceans. To determine global and region specific rates, we rely on models that estimate marine net primary productivity (NPP) thus it is essential these are evaluated to their accuracy. Here assessed skill 21 ocean color by comparing estimates depth-integrated NPP 1156 in situ 14C measurements encompassing ten regions including Sargasso Sea, pelagic North Atlantic, coastal Northeast Black Mediterranean Arabian...
The Global Change Observation Mission-Climate (GCOM-C) satellite, launched in December 2017, is equipped with the Second-generation Imager (SGLI) sensor, featuring a moderate spatial resolution of 250 m and 19 spectral bands, including unique 380 nm band. After six years orbit, comprehensive evaluation SGLI products their temporal consistency needed. Remote sensing reflectance (Rrs) primary product for monitoring water quality, forming basis deriving key oceanic constituents such as...
An investigation is made of the global relationship between seasonal variations surface mixed‐layer depths derived from monthly climatological hydrographic data and pigments satellite ocean color data. At middle high latitudes western North Pacific Atlantic, shallowing depth winter to spring largely explains basin‐scale features bloom phytoplankton in terms Sverdrup's critical theory. In these areas occurs along with increase insolation spring. eastern Southern Ocean absence a difficult...
The influence of phytoplankton on the upper ocean dynamics and thermodynamics in equatorial Pacific is investigated using an isopycnal general circulation model (OPYC) coupled with a mixed layer remotely sensed chlorophyll pigment concentration from Coastal Zone Color Scanner (CZCS). In heat accumulation due to higher abundance pigments leads decrease thickness. This generates anomalous westward geostrophic currents north south equator. western Pacific, these merge into strengthen...
Seven cruises were conducted in the Changjiang (Yangtze River) Estuary and adjacent western East China Sea (ECS) from 2010 to 2012 study seasonal variations of δ13C δ15N suspended organic matter. In addition, two northeastern ECS July 2011 Tsushima Strait evaluate distribution patterns these isotopes over entire transport pathway. summer, surface was lowest Channel, increasing land sea, reaching highest values central ECS, then decreasing remaining relatively constant. winter, showed lower...