Berkeley Earth’s 2020 Global Temperature Report Reaches Over 380M Worldwide

Berkeley Earth released our annual Global Temperature Report for 2020, including findings that 2020 was the second warmest year on record. Thanks to our partners in the media, the independent research, data, and findings we presented in this report have reached an audience of nearly 400 million worldwide. One highlight of our impact: Berkeley Earth’s […]

Read More >

Press Release: Berkeley Earth 2020 Global Temperature Update

Berkeley Earth Global Temperature Update: 2020 Was Second Warmest Year Since 1850 Berkeley, Calif. — Berkeley Earth today released its Global Temperature Report for 2020, concluding that the year was nominally the second warmest on Earth since 1850 based on land and ocean data. Globally, 2020 was slightly cooler than and nearly tied with 2016. […]

Read More >

Berkeley Earth Publishes Detailed Methodology in New Paper

While our fully open-source surface temperature datasets have been publicly available for some time, this paper represents the first time our complete detailed methodology has been formally published. The paper specifically includes discussion of Berkeley Earth’s treatment of air temperature in the Arctic region, and provides visualization of the global warming trends suggested by Berkeley Earth’s dataset vs. other global temperature records.

Read More >

Nuclear Waste Needs to Be Part of the Conversation on Climate Change

Congratulations are in order for Berkeley Earth’s sister organization Deep Isolation, who announced today the closing of a $20m Series A funding round, led by nuclear industry leaders NAC International. Founded by Berkeley Earth Co-Founder and President Elizabeth Muller, Deep Isolation is developing a patented process to safely dispose of nuclear waste, a major issue […]

Read More >

The Role of Air Pollution Data in West Coast Firestorm

An earlier version of this article originally appeared on the Asthma Allergies Children website. By Liz Muller As I write this white ash is visible in the polluted San Francisco Bay Area air, wafting down from a smoky orange sky and into our lungs, a dangerous byproduct of wildfires burning more than 3 million acres […]

Read More >

Global Temperature Report for 2019

Berkeley Earth, a California-based non-profit research organization, has been preparing independent analyses of global mean temperature changes since 2013. The following is our report on global mean temperature during 2019. We conclude that 2019 was the second warmest year on Earth since 1850. The global mean temperature in 2019 was colder than 2016, but warmer […]

Read More >

Horrific air pollution in Europe

Horrific Air Pollution in Europe Reaches 7 cigarettes per day equivalent, a pack a day in India and China It’s winter, and that’s the worst air pollution period for Europe and China. The levels over much of the continent are in the unhealthy range. In the figure we show a map of the pollution of […]

Read More >

A second half dip, but 2016 hottest on record

2016 was the warmest year since humans began keeping records, by a wide margin. Global average temperatures were extremely hot in the first few months of the year, pushed up by a large El Nino event. Global surface temperatures dropped in the second half of 2016, yet still show a continuation of global warming. The […]

Read More >

Coal in China: Estimating Deaths per GW-year

by Zeke Hausfather Air pollution in China is a critical global health problem, responsible for somewhere between 700,000 and 2.2 million premature deaths annually. The largest single contributor to air pollution-related mortality is particulate matter below 2.5 microns in size, or PM2.5. Exposure to PM2.5 has been found to increase the risk of heart attacks, […]

Read More >

SimMod: A simple python based climate model

by: Zeke Hausfather, Berkeley Earth zeke@berkeleyearth.org The relationship between greenhouse gas (GHG) emissions and future warming is complex, depending on the atmospheric lifetime of gases, their radiative forcing, and the thermal inertia of the Earth, particularly our oceans. Many non-CO2 GHGs have shorter atmospheric lifetimes, and the global warming-equivalent values commonly used for analysis of emission […]

Read More >

Fort McMurray Fires

On May 1, 2016, a fire began southwest of Fort McMurray,  Canada. It swept through the community destroying over 2000 structures. You can read about the latest developments here. Since 2014 Berkeley Earth has been expanding its real time database of air pollution. Our original focus was on China, but we have continued to add other regions of […]

Read More >

Air Pollution and Cigarette Equivalence

by Richard A. Muller and Elizabeth A. Muller For many people, comparing air pollution to cigarette smoking is more vivid and meaningful than is citing the numbers of yearly deaths. When we published our scientific paper on air pollution in China in August 20151, we were surprised by the attention we got for a quick […]

Read More >

Nature Not NOAA Ended the Slowdown
in Temperatures

By Zeke Hausfather In recent weeks we’ve seen a political controversy over NOAA’s adjustments to temperature records, with accusations from some in congress that records are being changed to eliminate a recent slowdown in warming and to lend support to Obama administration climate policies. This makes it sound like the NOAA record is something of […]

Read More >

3 Packs a day: Killer Air in Shenyang

Earlier this month the Shenyang EPA reported the worse levels of air pollution since record keeping began: Estimates varied between 1000 and 1400 micrograms per cubic meter of PM2.5— the fine particulate matter that has deadly health consequences. The US embassy in Shenyang reported “off the chart” recordings. In our recent study in PLOS on […]

Read More >

Berkeley Earth Temperature Update

Over the past few days we have been publishing the first major update of our data since early 2015. The data can be found here on our data page. Given the time of year and the wide ranging discussion about whether or not 2014 was a record year, it seemed a good time to asses […]

Read More >

Killer Air: Comparing models and data

As the AP  reports  Lelieveld has published a paper in Nature  on the mortality associated with outdoor air pollution that  confirms what BerkeleyEarth found in its study of air pollution in China. By their estimate   ~1.357M deaths in China are caused by air pollution. By our estimate there are ~1.6 Million deaths per year in China […]

Read More >

PM2.5: A Tale of Two Days

In our study of air pollution in China, we stumbled upon two extraordinary days.  The first, which we initially thought was a fluke, turned out to be a single day when air pollution across China was more extensive than we had seen in a years worth of data.  It was a mystery until  lead scientist, […]

Read More >

Whither the pause? NOAA report shows no recent slowdown in warming

Mountains of ink have been spilled in recent years on whether or not global warming has paused or slowed down. We’ve discussed it extensively in the past, and numerous studies have examined whether the apparent pause might have been caused by additional ocean heat uptake, small volcanoes, a weak solar cycle, poor arctic coverage in existing datasets, and\or a […]

Read More >

Understanding Adjustments to
Temperature Data

There has been much discussion of temperature adjustment of late in both climate blogs and in the media, but not much background on what specific adjustments are being made, why they are being made, and what effects they have. Adjustments have a big effect on temperature trends in the U.S., and a modest effect on […]

Read More >

We have updated our Privacy Policy to reflect the use of personalized advertising cookies placed on our website. By continuing to use our site, you acknowledge that you accept our Privacy Policy.

I accept