Wednesday 12 July 2023

The Deep Blue Sea?

A National Oceanography Centre of Southampton University study examined 20 years of ocean images, taken by NASA's Modis-Aqua satellite. The most striking finding was that the 'deep blue sea' is becoming markedly greener (https://www.theguardian.com/environment/2023/jul/12/worlds-oceans-changing-colour-due-to-climate-breakdown-study-suggests). More than half of the globe's ocean surface waters are becoming greener. Latitudes, near the equator, show the most profound changes. This colour change seems to be generated by increased phytoplankton populations. These unicellular plants form the base of marine ecosystem food chains. This finding is yet another powerful confirmation of the impact of anthropogenic (human-mediated) 'greenhouse gas' emissions and the consequent climate change. What they mean for the health of the oceans is uncertain but it's unlikely to be good.

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