The Use of MTM-SVD Technique to Explore the Joint Spatiotemporal Modes of Wind and Sea Surface Variability in the North Indian Ocean during 1993–2005
Figure 4
Spatial variations at annual ( cycle ) cycle of (a) WSX on joint WSX-SSH; (b) SSH on joint WSX-SSH; (c) WSY on joint WSY-SSH; (d) SSH on joint WSY-SSH. Vector lengths in (a) and (b) correspond to the magnitude of each variable relative to size of WSX at a reference location (grid 529th at 7.25°N, 76.75°E). Phase of the vectors correspond to temporal difference (time lead/lag) relative to the reference vector (at 3 o’clock). In the spatial pattern, clockwise vector rotation represents negative relative lag (or “lead”), and counterclockwise rotation represents positive lag (or “lag”). A complete rotation represents a periodicity of the mode; for example, 1 year for cycle , and a grid point vector at 12 o’clock (90°) experiences peaks at 4 months lag relative to the reference grid point. The same analogous is applied for patterns in (c) and (d), where all vectors are related to vector at grid 529th of WSY.
