地理漫步·世界地理英语30篇（4）
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The Kuroshio Extension: Western Boundary Current Instability and Mesoscale Eddy Fields
黑潮延伸体：西边界流不稳定性与中尺度涡旋场
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This energetic current separates from Japan’s east coast and meanders across the North Pacific Gyre.
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Instabilities generate warm-core and cold-core eddies that persist for months and travel hundreds of kilometers.
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Eddy kinetic energy peaks where the current narrows and accelerates over seafloor ridges near the Izu-Ogasawara Arc.
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Satellite altimetry reveals how eddy trains modulate heat exchange between ocean and atmosphere regionally.
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Zooplankton biomass concentrates along eddy edges where nutrient-rich waters upwell near convergence zones.
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Fish larvae use eddy circulation to disperse across otherwise hostile open-ocean environments.
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Thermohaline structure inside eddies differs sharply from surrounding water, altering acoustic propagation for marine surveys.
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Chlorophyll-a anomalies trace phytoplankton blooms triggered by eddy-induced vertical mixing mechanisms.
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Surface drifters deployed in the extension show path divergence reflecting underlying eddy vorticity fields.
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Model simulations confirm that eddy heat transport contributes significantly to interannual sea-surface temperature variability east of Japan.