Table 5. Volumetric calculations of deglacial oxygenation changes for four Eastern Pacific continental margins: Subarctic Pacific (SP), California Current (CC), Mexico Margin (MM), and the Humboldt Current and Equatorial Pacific (HC).
| Region | Ka (Calendar Age) | Depth of seafloor analyzed (m), corrected for sea level rise | Regional margin volume (km3), corrected for sea level rise | Oxic upper ocean, from surface to upper subsurface hypoxic boundary (km3) | Total Oxic (km3) | Percent of margin oxic (%) | Severe hypoxia (km3) | Percent of margin severely hypoxic (%) | Intermediate hypoxia (km3) | Percent of margin intermediately hypoxic (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| SP | 14 | 3,214 | 1,524,000 | 456,000 | 479,000 | 32% | 1,045,000 | 68% | 0 | 0% |
| 10 | 3,255 | 1,500,000 | N/A | 1,500,000 | 100% | 0 | 0% | 0 | 0% | |
| 4 | 3,299 | 1,480,000 | 144,000 | 1,397,000 | 94% | 83,000 | 6% | 0 | 0% | |
| CC | 18 | 2,280 | 316,000 | N/A | 316,000 | 100% | 0 | 0.00% | 0 | 0% |
| 14 | 2,314 | 302,000 | 75,000 | 119,000 | 39% | 86,000 | 28% | 98,000 | 32% | |
| 12 | 2,336 | 295,000 | N/A | 295,000 | 100% | 0 | 0% | 0 | 0% | |
| 10 | 2,355 | 288,000 | 83,000 | 118,000 | 41% | 18,000 | 6% | 152,000 | 53% | |
| 4 | 2,399 | 277,000 | 91,000 | 189,000 | 68% | 17,000 | 6% | 70,000 | 25% | |
| MM | 18 | 1,080 | 65,000 | 60,000 | 62,000 | 96% | 2,000 | 4% | 0 | 0% |
| 14 | 1,114 | 66,000 | 35,000 | 38,000 | 58% | 28,000 | 42% | 0 | 0% | |
| 10 | 1,155 | 69,000 | 41,000 | 43,000 | 62% | 26,000 | 38% | 0 | 0% | |
| 4 | 1,199 | 74,000 | 49,000 | 54,000 | 73% | 19,000 | 26% | 0 | 0% | |
| HC | 18 | 3,180 | 6,155,000 | 4,731,000 | 4,794,000 | 78% | 0 | 0% | 1,360,000 | 22% |
| 13 | 3,222 | 5,885,000 | 265,000 | 306,000 | 5% | 531,000 | 9% | 5,047,000 | 86% | |
| 10 | 3,255 | 5,651,000 | 731,000 | 740,000 | 13% | 225,000 | 4% | 4,686,000 | 83% | |
| 4 | 3,299 | 5,245,000 | 2,330,000 | 5,151,000 | 96% | 0 | 0% | 193,000 | 4% |