Busybody scaremongers at work again! These are obviously pseudo scientists and they are working for the federal government, i.e. NOAA (National Oceanic and Atmospheric Administration)!
Any scientist who uses propaganda terms like "anthropogenic warming" is immediately suspect of demagoguery and prejudice!
Well, in 2024, we had plenty of rain in Phoenix, Arizona!
Two years of observations do not make climate! Any first year student knows that!
Many climate models are garbage! This study also relies heavily on climate modeling and simulations!
The Colorado River and tributaries with over 100 dams is certainly not a natural river!
"From 2020 to 2022, the western United States had two crises to deal with: COVID-19 and a once-in-a-millennium drought. In the past, such droughts have been driven by a lack of rain, but this one was different. It was primarily driven by heat instead—and that could be a glimpse of the future.
During those two years, water levels got lower in the Colorado River and other waterways than they had been since at least 800 C.E. , and the megadrought wreaked havoc in all sorts of ways—including “frequent power shortages from hydropower production, intense and widespread wildfires, low reservoir inflows, reduced agricultural productivity, and ecosystem degradation,” researchers write in a new paper. To understand how things got that bad, they turned to models that analyze the relative contributions of precipitation and “evaporative demand”—the potential for water loss based on atmospheric factors—for the recent megadrought and other droughts in the region since 1948.
Those models found that nearly two-thirds of the 2020-2022 drought’s severity could be attributed to evaporative demand, and that in general, this pattern was becoming the norm. “This is quite different from our grandma’s drought,” study co-author Rong Fu told The Washington Post. Rain that does fall simply evaporates before it can reach reservoirs, Fu said. “That has quite profound implications.”
In fact, projecting the trend forwards, the team concluded that droughts like these will become much more frequent. Instead of being a once-every-1000-years kind of event, megadroughts will be “equivalent to a 1-in-60-year event by the mid-21st century and a 1-in-6-year event by the late-21st century,” they write."
From the abstract:
"Historically, meteorological drought in the western United States (WUS) has been driven primarily by precipitation deficits. However, our observational analysis shows that, since around 2000, rising surface temperature and the resulting high evaporative demand have contributed more to drought severity (62%) and coverage (66%) over the WUS than precipitation deficit. This increase in evaporative demand during droughts, mostly attributable to anthropogenic warming according to analyses of both observations and climate model simulations, is the main cause of the increased drought severity and coverage. The unprecedented 2020–2022 WUS drought exemplifies this shift in drought drivers, with high evaporative demand accounting for 61% of its severity, compared to 39% from precipitation deficit. Climate model simulations corroborate this shift and project that, under the fossil-fueled development scenario (SSP5-8.5), droughts like the 2020–2022 event will transition from a one-in-more-than-a-thousand-year event in the pre-2022 period to a 1-in-60-year event by the mid-21st century and to a 1-in-6-year event by the late-21st century."
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