Fig. 5: Correlation maps between the surface chlorophyll-a concentration in the Tsugaru Gyre development season and the divergence of the surface velocity. | Nature Communications

Fig. 5: Correlation maps between the surface chlorophyll-a concentration in the Tsugaru Gyre development season and the divergence of the surface velocity.

From: Topographically driven vigorous vertical mixing supports mesoscale biological production in the Tsugaru Gyre

Fig. 5

The area for divergence estimation is delineated by the cyan rectangle, which is situated on the eastern (western) flank of the Shiriya Spur, ranging from 41.65°N–41.70°N, 141.60°E–141.65°E (41.65°N–41.70°N, 141.50°E–141.55°E) in (a) and (b) (c and d). a, c Cases with a 1-day lag, whereas b and d represent estimations with a 7-day lag. The grey dots indicate the grids in which the p value is greater than 0.05. The grey contours denote bathymetry. The black contours and vectors are the standardized mean relative vorticity by the inertial frequency at 41°N and the velocity at the surface estimated from OSCAR data between August and September for the years 2014–2021, respectively. Source data are provided as a Source Data file.

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