Fig. 7: Composites of austral summer low-level (850-hPa) meridional winds and upper-level anomalies during Northern LLJ and ENSO-PDO phases.
From: Pacific decadal oscillation and ENSO forcings of northerly low-level jets in South America
The left column shows 850-hPa meridional wind (V850) anomalies (m s−1) during Northern LLJ and a El Niño plus Warm PDO, b El Niño plus Cold PDO, c La Niña plus Warm PDO and d La Niña plus Cold PDO phases. The right column shows 200-hPa geopotential height (m) (Z200) and 200-hPa zonal wind (U200) anomalies during the Northern LLJ type and e El Niño plus Warm PDO, f El Niño plus Cold PDO, g La Niña plus Warm PDO and h La Niña plus Cold PDO phases. Z200 anomalies are shown in colors. Positive (negative) U200 anomalies are shown in solid (dashed) contours (1 m s−1 interval), with zero contour omitted. Anomalies are statistically significant at a 95% confidence level.
