POSTER SESSION 4
10:30–12:30, Thursday, September 17
Poster Session | 1 | 2 | 3 | 4 | Schedule at a Glance
ABSTRACT 1293 | POSTER 120
CAPTURING THE PULSE OF THE COAST: BIO-OPTICAL SIGNATURES AT THE TOKYO BAY–KUROSHIO INTERFACE FROM 250 M RESOLUTION GCOM-C/SGLI OBSERVATIONS
Monitoring the impact of climate change on dynamic coastal marine ecosystems remains extremely difficult due to complex geomorphological characteristics and hydrodynamic forcing features. This difficulty is compounded by latitudinally dependent temporal variability. Although multiple in situ and remote sensing monitoring methods exist, ocean color satellites remain the premier observational platform for assessing biogeochemical resilience of ecosystems. In 2017, the Japan Aerospace Exploration Agency (JAXA) launched the Global Change Observation Mission – Climate (GCOM-C) ocean color satellite equipped with the Second-generation GLobal Imager (SGLI) capable of multi-channel observations at 250 m resolution. Approaching its first decade in orbit, this satellite mission has provided an unprecedented view of potential climate change impacts occurring in the coastal marine ecosystems of Japan. The present study focuses on the temperate coastal-open waters of Sagami Bay, Japan. Sagami Bay is adjacent to a leaky, eutrophic Tokyo Bay but is open to the Western Boundary North Pacific and intermittent branching intrusions of the Kuroshio Current. Here, we present a unique coastal time series dataset of in situ bio-optical measurements coupled with high-resolution GCOM-C/SGLI observations towards providing a baseline for future climate change scenarios of these productive waters. Preliminary analysis reveals that the 250 m resolution SGLI significantly reduces near-shore adjacency effects, allowing for the precise tracking of eutrophic plumes from Tokyo Bay and oligotrophic Kuroshio branch intrusions. These high-resolution observations reveal a decade-long shift in the timing of phytoplankton blooms, suggesting that Sagami Bay is already responding to changing hydrodynamic forcing and regional warming.
Victor Kuwahara, Graduate School of Science and Engineering, Soka University, [email protected], https://orcid.org/0000-0003-4171-3894
Hiroshi Murakami, Japan Aerospace Exploration Agency (JAXA), Earth Observation Research Center (EORC), [email protected], https://orcid.org/0000-0002-2917-8721
Shinji Shimode, Manazuru Marine Center for Environmental Research and Education, Yokohama National University, [email protected]
Koichi Yano, Graduate School of Science and Engineering, Soka University, [email protected]
Robel M. Ashenafi, Graduate School of Science and Engineering, Soka University, [email protected]
Mia L. Castillo, Graduate School of Science and Engineering, Soka University, [email protected]
Poster Session | 1 | 2 | 3 | 4 | Schedule at a Glance
