В океанах значительно уменьшается необходимый уровень концентрации кислорода. Ученый объясняют возникновение так называемых "мертвых зон" явным признаком всемирного изменения климата.
Такие зоны довольно длительное время располагались в глубинах, но за последнее время все чаще стали увеличиваться и возникать вблизи поверхности. К примеру, у восточного побережья Калифорнии концентрация кислорода за четверть века снизилась на двадцать процентов. Ученые предостерегают, что устоявшиеся океанические экосистемы и различные пищевые цепочки могут подвергнуться разрушению из-за возрастания размеров и количества "мертвых зон".
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