PWC Across Cenozoic (IMAGE) Science China Press Caption (a) The width of the PWC (degrees longitude). (b) The location of the western edge of the PWC (blue dots; ºE). Orange triangles and purple squares are the SST (ºC) and relative SST (ºC) averaged over the western equatorial Pacific (5ºS-5ºN; 120º-180ºE), respectively. (c) The locations of the eastern edge of the PWC (ºW), the eastern edge of the "cold tongue" (defined as the position of ?0.5 ºC isotherm in relative SST; orange triangles; ºW), and the center of descending motion over the eastern tropical Pacific (defined as the location of maximum vertical potential at 200 hPa; purple squares; ºW). (d) The intensity of the PWC (1010 kg s?1). (e) The intensity of the ascending branch of the PWC (1010 kg s?1). Orange triangles and purple squares are the SST gradient across the equatorial Pacific (defined as the SST difference between 130º-160ºE and 150º-120ºW; ºC) and across the Indian and Pacific oceans (defined as the SST difference between 60º-90ºE and 130º-160ºE; ºC), respectively. Credit ©Science China Press Usage Restrictions Use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.