Complex sentence: The dissolution/production ratio is much higher in the Atlantic upwelling than in the Pacific upwelling, most probably because the coastal upwelling source waters are much richer in DSi off Peru than off NW Africa Cortese, G., Gersonde, R. (2004).
Split into simpler sentences: The dissolution/production ratio is much higher in the Atlantic upwelling than in the Pacific upwelling. This is due to the fact that coastal upwelling source waters are much richer in DSi off Peru, than off NW Africa Cortese, G., Gersonde, R. (2004).