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Half world’s largest lakes and reservoirs drying up — study
More than half of the world's largest lakes and reservoirs are dwindling and placing humanity's future water security at risk, with climate change and unsustainable consumption the main culprits, a study said Thursday. "Lakes are in trouble globally, and it has implications far and wide," Balaji Rajagopalan, a professor at the University of Colorado Boulder and co-author of the paper, which appeared in Science, told AFP. "It really caught our attention that 25 percent of the world's population is living in a lake basin that is on a declining trend," he continued, meaning some two billion people are impacted by the findings. Unlike rivers, which have tended to hog scientific attention, lakes aren't well monitored, despite their critical importance for water security, said Rajagopalan. But high-profile environmental disasters in large water bodies like the Caspian Sea and the Aral Sea signaled to researchers a wider crisis. To study the question systematically, the team, which included scientists from the United States, France, and Saudi Arabia, looked at Earth's biggest 1,972 lakes and reservoirs, using observations from satellites from 1992-2020. They focused on larger freshwater bodies because of the better accuracy of satellites at a larger scale, as well as their importance for humans and wildlife. 17 Lake Meads lost Their dataset merged images from Landsat, the longest-running Earth observation program, with water surface height acquired by satellite altimeters, to determine how lake volume varied over nearly 30 years. The results: 53 percent of lakes and reservoirs saw a decline in water storage, at a rate of approximately 22 gigatonnes a year. Over the whole period studied, 603 cubic kilometers of water (145 cubic miles) was lost, 17 times the water in Lake Mead, the United States' largest reservoir. To find out what drove the trends, the team used statistical models incorporating climate and hydrologic trends to tease out natural and human-driven factors. For natural lakes, much of the net loss was attributed to climate warming as well as human water consumption. Increased temperatures from climate change drive evaporation, but can also decrease precipitation in some places. "The climate signal pervades all factors," said Rajagopalan. Lead author Fangfang Yao, a visiting fellow at CU Boulder, added in a statement: "Many of the human and climate change footprints on lake water losses were previously unknown, such as the desiccations of Lake Good-e-Zareh in Afghanistan and Lake Mar Chiquita in Argentina." Losses in humid regions, too One surprising aspect was that lakes in both wet and dry regions of the world are losing volume, suggesting the "dry gets drier, wet gets wetter" paradigm that is frequently used to summarize how climate change affects regions, doesn't always hold. Losses were found in humid tropical lakes in the Amazon as well as Arctic lakes, demonstrating a trend more widely spread than predicted. Accumulating sedimentation was blamed for storage loss in drying reservoirs. But although most global lakes were dwindling, nearly a quarter saw significant increases in their water storage. These included the Tibetan Plateau, "where glacier retreat and permafrost thawing partially drove alpine lake expansion," the paper said. Hilary Dugan, a scientist who studies freshwater systems at the University of Wisconsin-Madison and who wasn't involved in the study, told AFP the research advanced scientific understanding of lake volume variability, which is of "huge importance." It is "unique in that it focuses on specific lakes, and reports the amount of water as a volume," she said. But she added: "It's important to keep in mind that many water supplies are from small lakes and reservoirs," and future research should consider these too. Globally, freshwater lakes and reservoirs store 87 percent of the planet's liquid freshwater, underscoring the urgency of new strategies for sustainable consumption and climate mitigation. "If a good chunk of freshwater lakes are drying, then you're going to see the impact come to you one way or the other, if not now in the not-too-distant future," said Rajagopalan. "So it behooves all of us to be good stewards." The post Half world’s largest lakes and reservoirs drying up — study appeared first on Daily Tribune......»»
US retailer Bed Bath & Beyond files for bankruptcy
Bed Bath & Beyond filed for bankruptcy Sunday, cementing a years-long decline that saw losses surpass a billion dollars annually as the US retailer struggled to adapt to an uncertain economy and the dominance of online shopping. The home goods chain filed voluntary petitions for relief under Chapter 11 at the United States Bankruptcy Court for the District of New Jersey, a court filing showed. The New Jersey-based retailer, the seller of everything from shower curtains and soaps to vacuum cleaners and duvet covers, for years, was a fixture on the Fortune 500 list of biggest American companies. It said in a statement it had sought bankruptcy protection "to implement an orderly wind-down of its businesses while conducting a limited marketing process to solicit interest in one or more sales of some or all of its assets." Bed Bath & Beyond shares dove in January as it warned of "substantial doubt about the Company's ability to continue as a going concern," a sign that was widely interpreted to mean it could file for bankruptcy. The company said at the time that it expected a loss of $386 million in the just-finished quarter. Despite several efforts to restructure -- including the closure in 2022 of 150 of its underperforming stores -- Bed Bath & Beyond was unable to turn its slumping finances around. It says it has secured a commitment of $240 million in debtor-in-possession financing from a lender to support its operations during bankruptcy. The company has listed both its estimated assets and estimated liabilities at between $1 billion and $10 billion, according to a court filing. Closing sales at the stores will start on Wednesday. "Thank you to all of our loyal customers," a banner on the company's website read Sunday. "We have made the difficult decision to begin winding down our operations." Chief Executive Officer Sue Gove said the company "will continue working diligently to maximize value for the benefit of all stakeholders." "Millions of customers have trusted us through the most important milestones in their lives -- from going to college to getting married, settling into a new home to having a baby," she said in the company statement. "We deeply appreciate our associates, customers, partners, and the communities we serve, and we remain steadfastly determined to serve them throughout this process." The company said its "360 Bed Bath & Beyond and 120 Buy Buy Baby stores and websites will remain open and continue serving customers as the Company begins its efforts to effectuate the closure of its retail locations." Last September, its chief financial officer Gustavo Arnal fell to his death from a New York skyscraper in what was ruled a suicide. No date has been set for the company's first debtors' hearing, it said. Bed Bath & Beyond, founded in 1971, grew to operate stores in all 50 US states plus Puerto Rico, Canada, and Mexico. As sales plummeted last year, the company struggled to maintain supply in its stores, and share prices tumbled. While competitors like Amazon and Target invested heavily in improving the online shopping experience in recent years, Bed Bath & Beyond labored at "evolving" its business and adapting, Richard McMahon, a former executive at the company who departed in 2015, told the New York Times. "The internet started to become real and consumer behavior was changing through that process," he added. The post US retailer Bed Bath & Beyond files for bankruptcy appeared first on Daily Tribune......»»
Richest man leaves earth – for 11 minutes
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