Tag Archive for: Climate Change

Atmospheric Rivers-CW3E-Scripps-Rain

Landfalling Atmospheric Rivers Increase in First Quarter of Water Year 2021 Over 2020

/in , /by

A Scripps Center for Western Weather and Water Extremes report shows that more atmospheric rivers have made landfall over the U.S. West Coast in the first four months of Water Year 2021 compared to the previous period in 2020.

The four months of Water Year 2021 experienced a total of 35 landfalling ARs over the U.S. West Coast, six more than the first four months of Water Year 2020, according to the CW3E quarter year summary released February 11.

Key takeaways from the CW3E update on atmospheric rivers

• The first four months of Water Year 2021 experienced a total of 35 landfalling ARs over the U.S. West Coast, 6 more than the first four months of Water Year 2020.
• Water Year 2021 also experienced more than twice as many strong or greater ARs (14) compared to Water Year 2020 (6).
• While Water Year 2021 saw more ARs in its first 4 months compared to Water Year 2020, a large majority of those ARs were
strongest over the Pacific Northwest (Oregon and Washington).
• The average landfall latitude thus far in Water Year 2021 was 45.9°N compared to 43.9°N during the first half of Water Year 2020.
• The lack of landfalling ARs over Southern California and Baja California has resulted in much drier conditions over the southwestern U.S. compared to WY 2020.

CW3E-Atmospheric Rivers-Water Year 2021

The four months of Water Year 2021 experienced a total of 35 landfalling ARs over the U.S. West Coast, six more than the first four months of Water Year 2020. Graphic: Center for Western Weather and Water Extremes

Distribution of Landfalling Atmospheric Rivers over the U.S. West Coast During Water Year 2021: Quarter Year Summary

Atmospheric River-NOAA-WNN-CW3E

A partnership with the San Diego County Water Authority and the Scripps Institution of Oceanography at UC San Diego seeks to optimize water management to better predict atmospheric rivers before, during, and after those seasonal storms.

In August 2020, Scripps Center for Western Weather and Water Extremes (CW3E) launched the Water Affiliates Group, which brings together cutting-edge science and hands-on water industry experience to enhance reservoir operations in light of the changing climate. The Water Authority has a long-running alliance with Scripps and is among six founding water agencies statewide.

CW3E and its partners will share and support best practices in forecast-informed reservoir operations, increase research around atmospheric rivers and droughts, and develop strategies for mitigating flood risk and increasing water supply reliability.

Atmospheric Rivers-CW3E-water supply

The above image, from the EOS article, is a depiction of an atmospheric river, interacting with West Coast mountains and a midlatitude cyclone over the northeast Pacific on 5 February 2015. This image provides an example of approximate locations of associated tropical moisture exports and a warm conveyor belt (WCB). Graphic: Adapted from NOAA/ESRL Physical Sciences Division via CW3E

Local Ag Looks to Spotlight its Climate-Friendly Profile

/in , /by /Bakersfield.comby John Cox

The Kern County Farm Bureau issued a “call to action” this week asking local growers and ranchers to participate in a series of upcoming meetings that will influence the role California’s agricultural lands will be expected to play, or continue to play, in fighting climate change. Besides asking members to speak up at a series of online meetings the state is hosting this month, the bureau is collecting data it hopes will illustrate local ag producers’ “climate-conscious nature” with an eye toward ensuring private industry will continue managing its property “on a voluntary basis,” bureau President John C. Moore III said by email.

Full Story

Distribution of Landfalling Atmospheric Rivers Over the U.S. West Coast During Water Year 2021: Quarter Year Summary

/in /by /California for Western Water and Weather Extremes
Full Story

California’s Rainfall is at Historic Lows. That Spells Trouble for Wildfires and Farms

/in , /by /The Guardian by Katharine Gammon

There’s a race on in California, and each day matters: the precipitation during winter that fuels the snowpack in the Sierra Nevada and fills groundwater supplies has been slow to start, and faltering at best. Northern California remains stuck in one of the worst two-year rainfall deficits seen since the 1849 Gold Rush, increasing the risk of water restrictions and potentially setting up dangerous wildfire conditions next summer.

Full Story

Scripps Oceanography Gets Share of California Energy Commission Contract to Simulate Climate Change

/in , /by /Del MarTimesby Elisabeth Frausto

The California Energy Commission has awarded a $1.5 million contract to three University of California campuses, including UC San Diego, that will work in tandem to better simulate climate change scenarios that can be used by utilities and others to anticipate the effects.

Full Story

Joe Biden Wants 100% Clean Energy. Will California Show that it’s Possible?

/in , /by /Los Angeles Timesby Sammy Roth

The undersea power line would run south from San Luis Obispo County, hugging the California coast for 200 miles before making landfall in or near Los Angeles. It would be able to carry electricity from a fleet of offshore wind turbines, providing Southern California with clean power after sundown and helping to replace fossil-fueled generators.

Fewer planet-warming emissions, less risk of blackouts and no chance of igniting the wildfires sometimes sparked by traditional power lines: Those are the arguments for the $1.9-billion Pacific Transmission Expansion.

Full Story

Scripps Researcher Finds Ozone-Eating Chemical Level Falling

/in , /by /KPBS San Diegoby Erik Anderson

A San Diego scientist says a surge in outlawed ozone-depleting gasses appears to be easing. Scripps Institution of Oceanography researcher Ray Weiss says levels of chlorofluorocarbons (CFCs) in the atmosphere began rising a few years ago, even though they had been outlawed by the Montreal Protocol. The chemical was once used as a refrigerant and in the manufacture of foam, but CFCs were outlawed more than a decade ago.

Full Story

Colorado’s Water Plan has Made Progress Toward Ensuring Supply, but the Work’s Far From Done

/in , /by /The Colorado Sunby Sarah Kuta

In the five years since Colorado’s Water Plan took effect, the state has awarded nearly $500 million in loans and grants for water projects, cities have enacted strict drought plans, communities have written nearly two dozen locally based stream-restoration plans and crews have been hard at work on improving irrigation systems and wastewater treatment plants. But there are big challenges ahead — drought, population growth, accelerating climate change, budget cuts, wildfires and competing demands for water, among others.

Full Story

Marin Water Suppliers Consider Drought Restrictions

/in , , /by /Marin Independent Journalby Will Houston

Marin County water districts are weighing the need for mandatory conservation actions in the face of abnormally low rainfall and what could be another prolonged drought.

Marin’s two largest suppliers — the Marin Municipal Water District and the North Marin Water District — plan to begin with voluntary conservation measures before considering more restrictive options such as rationing and irrigation bans similar to those of the 2014 drought.

Full Story

The Colorado River Crisis is a National Crisis

/in , , /by /The New Republicby Nick Martin

The Colorado River supports over 40 million people spread across seven southwestern states, 29 tribal nations, and Mexico. It’s responsible for the irrigation of roughly 5.5 million acres of land marked for agricultural use. Local and regional headlines show the river is in crisis. The nation mostly isn’t listening.

Full Story