California Feeling The Impact Of Urban Heat Island Effect

Increases in average temperatures are mostly caused by urbanization and not greenhouse warming argue authors of a recent study.

1 minute read

March 30, 2007, 12:00 PM PDT

By Christian Madera @http://www.twitter.com/cpmadera


"Average temperatures across California rose slightly from 1950 to 2000, with the greatest warming coming in the state's big cities and mostly caused by urbanization -- not greenhouse gases -- authors of a study released on Wednesday said.

The study found that average temperatures in California rose nearly 2 degrees Fahrenheit (nearly one degree Celsius) in the second half of the 20th century, led by large urban centers such as San Francisco and Southern California.

"Everybody's talking about the carbon coming out of the SUV exhaust or the coal plant, but in the past 50 years in California the bigger impact has been urbanization and suburbanization," said Bill Patzert of NASA's Jet Propulsion Laboratory, one of the study's authors."

Thursday, March 29, 2007 in Reuters

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Aerial view of single-family homes with swimming pools in San Diego, California.

San Diego to Rescind Multi-Unit ADU Rule

The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

March 9, 2025 - Axios

Canadian flag in foreground with blurred Canadian Parliament building in background in Ottawa, Ontario, Canada.

Has President Trump Met His Match?

Doug Ford, the no-nonsense premier of Canada's most populous province, Ontario, is taking on Trump where it hurts — making American energy more expensive.

March 11, 2025 - Toronto Star

Close-up of green ULEZ sign in London, UK.

Study: London ULEZ Rapidly Cleaning up Air Pollution

Expanding the city’s ultra low-emission zone has resulted in dramatic drops in particle emissions in inner and outer London.

March 10, 2025 - Smart Cities World

New York City city hall building.

Are Black Mayors Being Pushed Out of Office?

The mayors of New York, St. Louis, and Pittsburgh all stand to lose their seats in the coming weeks. They also all happen to be Black.

16 minutes ago - Governing

Bird's eye view of coastal erosion next to a roadway in Sunset Cliffs, California.

‘Innovative DOT’ Guide Offers Path to Resilience for State DOTs

A new resource offers concrete recommendations for thriving in a changing transportation landscape, prioritizing a ‘fix it first’ approach to infrastructure maintenance.

1 hour ago - Transportation for America

Close-up of smart phone with USDOT website open.

USDOT Eliminates Environmental, Equity Considerations

A new memo rescinds Biden-era regulations that prioritized renewable energy, accessibility, and equity for historically disadvantaged communities.

March 13 - Smart Cities Dive

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.