XPost: alt.global-warming

*Widespread deoxygenation of temperate lakes

Nature

Dissolved oxygen have decreased between 2.8 and 9.3 times faster in
lakes than in oceans between 1941 and 2017, according to a new
study. The paper analyses over 45,000 dissolved oxygen measurements
and temperature profiles for 393 temperate lakes. It finds that the
drop in dissolved oxygen levels in lakes is mainly driven by higher temperatures - as warmer water can hold less dissolved oxygen. The
authors note that the drop in oxygen levels is "widespread in surface
and deep-water habitats" and suggest that "climate change and
declining water clarity have altered the physical and chemical
environment of lakes".


*Climate crisis is suffocating the world's lakes, study finds

Damian Carrington, The Guardian

Rising temperatures are causing a drop in oxygen levels in the world's
lakes, according to new research covered by the Guardian, which says
the shift is "suffocating wildlife and threatening drinking water
supplies". The paper reports: "Falling levels of oxygen in oceans had
already been identified, but new research shows that the decline in
lakes has been between 3 and 9 times faster in the past 40
years. Scientists found oxygen levels had fallen by 19% in deep waters
and 5% at the surface." The Times runs under the headline: "Wildlife
at risk as climate change starves lakes of oxygen." It says the
research looked at records from 1941-2017 and found that oxygen levels
in temperate lakes are falling between 3 and 9 times faster
than in the ocean. The Sydney Morning Herald covers the research,
which it says was based on findings from 393 temperate lakes mostly in
Europe and North America. MailOnline also has the story.

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