DoomsdaysCW<p>The world’s largest <a href="https://kolektiva.social/tags/lakes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>lakes</span></a> are shrinking dramatically and scientists say they have figured out why</p><p>These significant bodies of water include the Colorado River’s <a href="https://kolektiva.social/tags/LakeMead" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LakeMead</span></a>, which has receded sharply amid a <a href="https://kolektiva.social/tags/megadrought" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>megadrought</span></a> and decades of <a href="https://kolektiva.social/tags/overuse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>overuse</span></a>.</p><p>By Laura Paddison, CNN </p><p>Published May 18, 2023 4:29 PM EDT </p><p>The shrinking of many lakes has been well documented, but the extent of change – and the reasons behind it – have been less thoroughly examined, said Fangfang Yao, the study’s lead author and a visiting scholar at the Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder.</p><p>The researchers used satellite measurements of nearly 2,000 of the world’s largest lakes and reservoirs, which together represent 95% of Earth’s total lake water storage.</p><p>Examining more than 250,000 satellite images spanning from 1992 to 2020, along with climate models, they were able to reconstruct the history of the lakes going back decades.</p><p>The results were “staggering,” the report authors said.</p><p>They found that 53% of the lakes and reservoirs had lost significant amounts of water, with a net decline of around 22 billion metric tons a year – an amount the report authors compared to the volume of 17 Lake Meads.</p><p>More than half of the net loss of water volume in natural lakes can be attributed to human activities and climate change, the report found. <br>The report found losses in lake water storage everywhere, including in the humid <a href="https://kolektiva.social/tags/tropics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tropics</span></a> and the cold Arctic. This suggests “drying trends worldwide are more extensive than previously thought,” Yao said.</p><p>Different lakes were affected by different drivers.</p><p><a href="https://kolektiva.social/tags/Unsustainable" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Unsustainable</span></a> water consumption is the predominant reason behind the shriveling of the <a href="https://kolektiva.social/tags/AralSea" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AralSea</span></a> in Uzbekistan and California’s <a href="https://kolektiva.social/tags/SaltonSea" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SaltonSea</span></a>, while changes in rainfall and runoff have driven the decline of the <a href="https://kolektiva.social/tags/GreatSaltLake" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GreatSaltLake</span></a>, the report found.</p><p>In the <a href="https://kolektiva.social/tags/Arctic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Arctic</span></a>, lakes have been shrinking due to a combination of changes in temperature, precipitation, evaporation and runoff.</p><p>“Many of the human and climate change footprints on lake water losses were previously unknown,” Yao said, “such as the desiccations of <a href="https://kolektiva.social/tags/LakeGoodEZareh" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LakeGoodEZareh</span></a> in Afghanistan and <a href="https://kolektiva.social/tags/LakeMarChiquita" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LakeMarChiquita</span></a> in Argentina."</p><p><a href="https://kolektiva.social/tags/WaterIsLife" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WaterIsLife</span></a> <a href="https://kolektiva.social/tags/WaterWars" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WaterWars</span></a> <a href="https://kolektiva.social/tags/Consumption" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Consumption</span></a> <a href="https://kolektiva.social/tags/ClimateCrisis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ClimateCrisis</span></a></p><p>Read more:<br><a href="https://www.accuweather.com/en/climate/worlds-largest-lakes-see-sharp-declines/1528645" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">accuweather.com/en/climate/wor</span><span class="invisible">lds-largest-lakes-see-sharp-declines/1528645</span></a></p>