Zeke Hausfather @hausfath Twitter profile | Pikagi

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Zeke Hausfather

@hausfath

89,879

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"A tireless chronicler and commentator on all things climate" -NYTimes. Climate lead @stripe , writer @CarbonBrief , scientist @BerkeleyEarth , IPCC/NCA5 author.

San Francisco

https://t.co/gsLvo5Zt4e

Joined July 2008

Don't wanna be here? Send us removal request.

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@hausfath

Zeke Hausfather

6 months

After three years of work by a team of over 750 scientists, we are releasing the US 5th National Climate Assessment today! We see greater impacts of climate change on the US since the 2018 NCA4 report, but also some encouraging signs of progress.

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Fifth National Climate Assessment

The Fifth National Climate Assessment is the US Government’s preeminent report on climate change impacts, risks, and responses. It is a congressionally mandated interagency effort that provides the...

nca2023.globalchange.gov

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@hausfath

Zeke Hausfather

2 years

It's a bit eye opening how many time I, a climate scientist, have been called a denier in the last 24 hours for having the temerity to say our children are not necessarily consigned to an apocalyptic hellscape of a future. Doomism is a disease, and a self-fulfilling prophesy.

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Zeke Hausfather

7 months

The first global temperature data is in for the full month of September. This month was, in my professional opinion as a climate scientist – absolutely gobsmackingly bananas. JRA-55 beat the prior monthly record by over 0.5C, and was around 1.8C warmer than preindutrial levels.

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Zeke Hausfather

1 year

I object to this chart, because it turns out that the reconstruction of a single location based on an ice core drilled 40 years ago in Greenland that ends in 1885 is not a good representation of global temperatures. If we use hundreds of sites and proxy records worldwide we get:

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@jordanbpeterson

Dr Jordan B Peterson

@jordanbpeterson

1 year

Anyone object to this chart?

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@hausfath

Zeke Hausfather

1 year

Case in point of why the media needs to be careful when publishing sensational stories about material demand for clean energy. The @guardian runs a story that US vehicles require 300 million tons of lithium. Than realizes they messed up the units and corrects it to be 300k tons!

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@hausfath

Zeke Hausfather

4 years

Spending $300 billion to combat desertification won't "buy up to 20 years of time to fix global warming" if we continue to increase our emissions of CO2 and other greenhouse gases. This article is quite confused and misleading.

@business

Bloomberg

4 years

$300 billion. That’s the amount of money needed to stop the rise in greenhouse gases and buy up to 20 years of time to fix global warming, according to UN climate scientists

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@hausfath

Zeke Hausfather

4 years

Our best estimate is that 100% of the warming the world has experienced is due to human activities. Natural factors – changes in solar output and volcanoes – would have led to slight cooling over the past 50 years:

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@hausfath

Zeke Hausfather

3 years

California is planning to shut down its last nuclear plant soon. From a carbon-free electricity standpoint, this is the equivalent of tearing down every wind turbine in the state, or half of our solar panels. From a new article by my colleague @_A_Stein_ :

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Zeke Hausfather

8 months

Its hard to overstate just how exceptionally high global temperatures are at the moment. They have blown past anything we've previously experienced by a huge margin. Over at The Climate Brink, we try and visualize this summer of extremes in seven charts.

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@hausfath

Zeke Hausfather

3 years

The new IPCC 6th Assessment Report (AR6) provides an unprecedented degree of clarity about the future of our planet, and the need to reduce – and ultimately eliminate – our emissions of greenhouse gases. In this thread I take a look at some key findings from the report: 1/27

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@hausfath

Zeke Hausfather

10 months

BREAKING: June 2023 has blown away all prior records for the month of June, coming in at a staggering 0.16C above the prior record set in 2019. It was around 1.46C above the typical temperatures we saw in June in the preindustrial era (1850-1899).

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Zeke Hausfather

5 years

There really is an xkcd for everything:

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Zeke Hausfather

2 years

The Tonga eruption yesterday appears to be one of the largest volcanic events we have seen in decades. We do not know how much cooling SO2 it has put in the stratosphere (data will come in later today), but this is the effect a Pinatubo-sized volcano would have on temps today:

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Zeke Hausfather

2 years

For every degree (Celsius) of climate change, the amount of water vapor in the atmosphere increases by around 7%. This results in more intense extreme rainfall events almost everywhere as the world warms:

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Zeke Hausfather

1 year

Climate change is due to our cumulative emissions, not just our emissions today. While rich countries have started decreasing emissions in recent decades, rich country emissions are still responsible for a substantial majority of the 1.2C warming to-date

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@hausfath

Zeke Hausfather

3 years

Big news: recent CO2 emissions have been revised notably downward in the just-released @gcarbonproject dataset. The revisions – due to a major reassessment of land-use – suggest emissions have likely been flat rather than increasing over past decade: 1/19

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Zeke Hausfather

1 year

Always be skeptical when you see stuff like this. It turns out that: 1) all those scary sounding chemicals are not particularly scary 2) wind turbines actually do get recycled and 3) the amount of waste is tiny compared to coal ash and impacts are tiny vs burning fossil fuels

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@JohnLeePettim13

John Lee Pettimore

@JohnLeePettim13

1 year

The legacy of wind turbines. Millions of worn-out wind turbine blades, containing poly- and perfluoroalkyl substances, perfluorooctanoic acid and perfluorooctane sulfonates. They cant be recycled so they are left to rot. #GreenEnergy

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Zeke Hausfather

2 years

I have some big career news: I'll be joining the team over at @stripe as their climate research lead, helping to scale permanent carbon removal to meet the challenges of dealing with hard-to-decarbonize sectors of the economy and drawing down atmospheric CO2 later in the century.

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@hausfath

Zeke Hausfather

2 years

We need to do much more to tackle climate change, but there is some good news for once. In @Nature this week, @ClimateFran and I point out that falling costs of clean energy and strengthening climate policies move us away from the darkest climate futures:

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@hausfath

Zeke Hausfather

6 months

Nope, a new Icelandic volcano would put an equivalent of a few hours of current global CO2 emissions over its lifetime. Volcanoes emit megatons, humans emit gigatons.

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What do volcanoes have to do with climate change? - NASA Science

Volcanic eruptions are often discussed in the context of climate change because they release CO2 and other gases into our atmosphere. However, the impact of human activities on the carbon cycle far...

science.nasa.gov

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@hausfath

Zeke Hausfather

4 years

After a year of work our paper on evaluating performance of historical climate models is finally out! We found that 14 of 17 the climate projections released between 1970 and 2001 effectively matched observations after they were published. 1/19

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Zeke Hausfather

1 year

Every time I discuss climate science folks inevitably ask "what about the sun". Over the long term the sun has a big impact. But over the past 50 years when the Earth has warmed rapidly, the amount of energy reaching us from the sun has slightly declined:

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Zeke Hausfather

4 years

Ocean heat content in 2019 was the warmest on record by a sizable margin. Between 2018 and 2019 the oceans absorbed an amount of heat around four times larger than all the energy used by humans in the world.

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Zeke Hausfather

2 years

This is legitimately nuts. Mail delivery is quite possibly the perfect use case for electric trucks (most routes <70 miles, constant stop-and-go, etc.), but instead we are locking in two more decades of gas guzzlers.

USPS Seals Gasoline-Trucks Deal, Shunning Biden EV Plea

www.bloomberg.com

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@hausfath

Zeke Hausfather

4 years

Here is a longer look at what meeting various climate targets (without negative emissions) would entail compared to our historical emissions:

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@hausfath

Zeke Hausfather

1 year

"While volcanic eruptions do cause an increase in atmospheric CO2, human activities emit a Mount St. Helens-sized eruption of CO2 every 2.5 hours and a Mount Pinatubo-sized eruption of CO2 twice daily." -NASA Humans emit 100x more annually than volcanoes:

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What do volcanoes have to do with climate change? - NASA Science

Volcanic eruptions are often discussed in the context of climate change because they release CO2 and other gases into our atmosphere. However, the impact of human activities on the carbon cycle far...

science.nasa.gov

@Omnicentrist

Omnicentrist 💉 MicroChip🆔️1984

1 year

Did you say CO2. Well here is that last centuries worth in 10 minutes. Ban volcanoes. Can we make them go solar or wind 🤔

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@hausfath

Zeke Hausfather

1 month

The rate of warming has increased notably over the past 15 years. This is not just natural variability – there is increasing evidence that the world is now warming faster than it has since 1970. However, this should not come as a surprise; acceleration is exactly what our models…

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@hausfath

Zeke Hausfather

2 years

“I unequivocally reject, scientifically and personally, the notion that children are somehow doomed to an unhappy life”. The great @DrKateMarvel in @ezraklein 's new column (also feat. @leahstokes , @dwallacewells , and me):

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Opinion | Your Kids Are Not Doomed (Published 2022)

The green future has to be a welcoming one, even a thrilling one.

www.nytimes.com

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@hausfath

Zeke Hausfather

3 years

In a new analysis, we find there are now 32 countries that have absolutely decoupled economic growth from CO2 since 2005. In these places both territorial emissions and consumption emissions (which include CO2 imported in goods) are falling. A thread: 1/21

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@hausfath

Zeke Hausfather

2 years

This is probably the most important figure in the new IPCC WG3 report. We need to accelerate the deployment of mature clean energy technologies and behavioral shifts this decade even as we work to develop the technologies we will need for the next few:

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@hausfath

Zeke Hausfather

8 months

This is mind boggling silly. We’ve put 2.5 trillion tons of CO2 in the atmosphere. The amount of CO2 in the atmosphere has increased by 1.1 trillion tons after being relatively stable for millennia before we started emitting. It’s hard to get more clear-cut causality.

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@curryja

Judith Curry

8 months

A provocative and controversial article by Koutsoyiannis et al. challenges how we think about causality and climate

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@hausfath

Zeke Hausfather

29 days

The fact that Texas has more than 3x the solar capacity coming online this year than California should make us reassess what we consider effective policy here. Yes, targets and subsidies are important, but so are interconnections and regulatory reform.

@AlecStapp

Alec Stapp

29 days

Blue states talk a big game on clean energy goals while Texas just goes and builds it.

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Zeke Hausfather

1 year

A sad example of how a lie will fly around the whole world while the truth is getting its boots on. What this graph really shows is a single day's temperatures from a weather model, compared to the 1979-2000 average. Here is what the daily data actually looks like over time:

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@hausfath

Zeke Hausfather

10 months

July is certainly shaping up to be a scorcher globally; we’ve now seen the four warmest days on record over the last four days:

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@hausfath

Zeke Hausfather

2 years

The argument that nothing the US does on climate will matter without China is a lot less compelling when you realize that China already spends well over twice as much as we do annually on building clean energy technologies:

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@max_gagliardi

max gagliardi

2 years

FYI nothing the West does to reduce emissions matters if China is not on board It is a literal lost cause

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@hausfath

Zeke Hausfather

5 years

Hi, climate scientist here. We keep putting out massive synthesis reports on the causes and impacts of climate change let by thousands of scientists worldwide. In fact, one just came out yesterday. It’s not our fault that you ignore them.

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@hausfath

Zeke Hausfather

7 months

The world has made real progress in bending down the curve of future emissions. While we remain far from on track to meet our climate goals, the positive steps we’ve made should reinforce that progress is possible and despair is counterproductive.

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Zeke Hausfather

4 months

Some great visuals of the 2023's gobsmackingly hot temperatures from @BBCNews :

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Zeke Hausfather

6 months

If we had started reducing emissions in 2000 the world would have had a gentle slope downward to limit warming to well-below 2C. 23 years later we face a steep decent to limit warming to 2C, and a near-cliff to achieve 1.5C without substantial net-negative global emissions

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Zeke Hausfather

2 years

Your regular reminder that, no, we are not all doomed, and climate meltdown can be stopped. But it’s up to us, and depends on how fast we can take action to cut emissions. We’ve made some progress in recent years, but still have a long way to go:

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@bryworthington

Bryony Worthington

@bryworthington

2 years

‘Soon it will be unrecognisable’: total climate meltdown cannot be stopped, says expert | Climate crisis | The Guardian

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Zeke Hausfather

3 years

Today Syukuro Manabe won the @NobelPrize for physics for his foundational work on climate modeling. Back in 1970, Manabe made the first specific projection of future warming, arguing the global temps would increase by 0.57C between 1970 and 2000. He was spot-on: it warmed 0.54C.

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Zeke Hausfather

1 year

The first climate model that estimated how the world might warm in the future was published in 1970. That model, as well as ones published in the 1970s, 80s, 90s, and 2000s, have done a remarkably good job predicting what actually occurred in the years after they were published

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Zeke Hausfather

1 year

Hi internet, the fake paper we published on April 1st about whale-based carbon removal was a joke. That day is April fools, where we say things that are so obviously silly that everyone sees them as a joke. But it looks like someone missed the date…

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Turning whales into carbon-based assets won’t be easy

We have allowed the natural capital on which we all depend to be depreciated off the books

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Zeke Hausfather

1 year

It’s just sad that @elonmusk , who started the world biggest EV company and one of the largest solar companies in an effort to fight climate change, is now spending his time amplifying voices that attack clean energy and dismiss climate science.

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Zeke Hausfather

5 months

It is now official: November was the warmest November on record by a wide margin in the JRA-55 dataset, beating the prior record set in 2020 by 0.3C. November 2023 was 1.6C above preindustrial levels, and the year-to-date temperatures are 1.4C above preindustrial.

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Zeke Hausfather

9 months

The world is on track to experience its warmest August on record, beating the prior record set in 2016 by a fairly large margin. This further increases the likelihood that 2023 will be the warmest year since global records began in the mid-1800s.

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Zeke Hausfather

7 months

Here are monthly absolute temperatures (compared to anomalies). This September would not have been out of place as a typical July this decade in terms of global temperatures.

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@hausfath

Zeke Hausfather

3 years

Planting trees is easy. Turning them into durable forests that result in long-term carbon sequestration is much harder. A cautionary tale from India:

@ForrestFleisch1

Forrest Fleischman

@ForrestFleisch1

3 years

India has attempted large scale forest restoration for decades. We have just published one of the first systematic evaluations of these efforts. We find that decades of tree planting have had almost no impact on forest canopy cover or rural livelihoods. A Thread.

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Zeke Hausfather

7 months

How do recent extreme global temperatures compare to climate models? Lets first look at the last generation of models (CMIP5), which have generally performed well at reproducing observations. Here we see observations well above the 95th percentile of models in September.

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@hausfath

Zeke Hausfather

3 years

If emissions had peaked back in 2000 we would be skiing down a bunny slope toward 1.5C. Today we face a double black diamond, and in a few years it will be a cliff. We are almost certainly going to overshoot 1.5C and need large-scale permanent carbon removal to get back down.

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@hausfath

Zeke Hausfather

9 months

Its now official: July was the warmest July on record by a huge margin in @CopernicusECMWF 's ERA5 dataset, beating the prior record (set in 2019) by 0.33C. It was between 1.5C and 1.6C above preindustrial levels (depending on the dataset used to estimate pre-1950 temperatures).

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Zeke Hausfather

2 years

For what its worth, we have been projecting future warming since the first climate models in the late 1960s/early 1970s. We can look back to see how well they have performed. It turns out our models generally did a good job:

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Zeke Hausfather

1 year

One of our most stark findings in the recent IPCC report is that humans are the cause of pretty much all observed warming. Natural forcings alone would have led to flat or slightly cooling temps, and multidecadal variability is unlikely to play a major role in modern warming.

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Zeke Hausfather

5 years

This is an amazing visualizations by @alxrdk showing global temperatures from 1850 to today, and different pathways we might take in the future. This definitely wins the award for best warming stripes in my book!

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Zeke Hausfather

3 years

Areas in both Canada and Oregon just hit 117F. To put that in perspective, that would break the all-time highest temperature record in Las Vegas, which is in the middle of the Mojave desert.

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@hausfath

Zeke Hausfather

2 years

Global CO2 emissions from fossil fuels hit a record high in 2022. This is up 1% from 2021, and beats the pre-pandemic highs of 2019, according to the new @gcarbonproject report. @PFriedling and I break down details over at @CarbonBrief : A thread: 1/x

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Zeke Hausfather

2 years

If the world had started reducing emissions back in 2000, limiting warming to well-below 2C this century would have us skiing down a bunny slope. Today we are facing a black diamond, and waiting another decade means going down a cliff.

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@hausfath

Zeke Hausfather

1 year

People often tell me that the planet is too big for humans to change the climate. But they don't grasp just how massive our CO2 emissions have been. Since the late 1700s we've emitted 1.7 trillion tons, more than the total biomass on earth or everything ever built by humans.

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@hausfath

Zeke Hausfather

3 years

Based on the latest ERA5 data, 2020 was the warmest on record over land by a fair margin, tied for the warmest for the global as a whole, but only the 3rd warmest over the oceans. The world's land (where we all live) was 1.94C (3.5F) warmer than the preindustrial period in 2020.

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Zeke Hausfather

1 year

CO2 traps heat, and human emissions have increased the amount of CO2 in the atmosphere by 50% since the industrial revolution. But most folks don't know that we are not relying on models for this; we can directly measure the trapping of heat by CO2:

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Observational determination of surface radiative forcing by CO2 from 2000 to 2010

Nature - Model studies have been used to quantify the effects of increasing concentrations of atmospheric CO2 on infrared energy balance and thus climate over the past 200 years, but observational...

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@hausfath

Zeke Hausfather

4 months

The scale of climate change can be a bit mind-boggling at times. For example, the Greenland ice sheet has lost over 6 trillion metric tons of ice since 1970 – or more than 700 tonnes lost per person for every person on the planet today:

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Zeke Hausfather

2 years

Trees are a great way to suck up carbon from the atmosphere and support ecosystems. But as I discuss in today's @nytimes , we quickly run into problems when we pretend that they can effectively undo our emissions: 1/

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Opinion | Let’s Not Pretend Planting Trees Is a Permanent Climate Solution (Published 2022)

Carbon emissions are forever, so carbon removal should be, too.

www.nytimes.com

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@hausfath

Zeke Hausfather

5 months

Happy to announce that my son Xavier was born two weeks ago on November 27th! In related news, I might be around a bit less over the next few months as sleep takes precedence over talking about climate 😉

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@hausfath

Zeke Hausfather

11 months

One of the most compelling #ShowYourStripes figures is this one by @ed_hawkins showing global temperatures over the past 2000 years along with carbon dioxide levels in the atmosphere:

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@hausfath

Zeke Hausfather

3 years

Climate scientist here; stuff like this is dangerously inaccurate. If we stop emissions tomorrow, the earth will remain around 1.2C above preindustrial temps. If we get to net-zero emissions by 2060 or so, we can still limit warming to well below 2C.

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Any hope of keeping Earth habitable now requires sucking carbon back out of the atmosphere, a new...

Even if greenhouse-gas emissions stop now, global warming will continue for centuries, a study shows. The solution: removing carbon from the air.

www.businessinsider.com

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@hausfath

Zeke Hausfather

5 years

The next seven days are expected to reach near-record lows in the Northeast US. At the same time, they will be quite warm globally, around 1.2C above preindustrial temperatures. Resist the temptation to make claims about long-term warming based on short-term localized weather.

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@hausfath

Zeke Hausfather

3 months

Despite today's grim milestone with the world passing 1.5C over the past 12 months, I see some reasons for cautious climate hope. We stand both on the brink of severe climate impacts, but also on the brink of a rapid energy transition away from fossil fuels.

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@hausfath

Zeke Hausfather

4 years

In the Bay Area most homes do not have air conditioning. It used to only get above 85F around 5 days a year back in the 1970s (or 1900s). Today it gets above 85F around 15 days per years (and this doesn't include the exceptional 2020 heatwave). This is climate change.

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@hausfath

Zeke Hausfather

2 years

Today's sabotage of the Nord Stream 1 and 2 pipelines resulted in a substantial release of methane to the atmosphere. Initial estimates suggest ~115,000 tons CH4 from Nord Stream 2, amounting to ~3.2 million tons CO2-eq (GWP100). Possibly double this when accounting for NS1.

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@hausfath

Zeke Hausfather

2 years

Germany and the UK both lead the world in renewables, representing 40% of their electricity in 2020. But UK electricity emissions have fallen 70% since 1990, while Germany's have only fallen by 50%. UK has prioritized replacing coal, while Germany has shut down nuclear first.

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@hausfath

Zeke Hausfather

3 years

While the global as a whole has warming around 1.2C since preindustrial times, land areas where we all live have on average warmed close to 2C already. In honor of #ShowYourStripes day, here are land, ocean, and global stripes all shown relative to the same temperature range:

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@hausfath

Zeke Hausfather

3 years

It seems like we've recently crossed a perceptual climate tipping point, with climate-driven extremes like heat waves, wildfires, and torrential rains impossible to ignore. We used to think it was mainly a problem for our children; we are starting to realize its a problem for us.

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@hausfath

Zeke Hausfather

3 years

Senator Cruz, as a climate scientist I can authoritatively state the climate change is a global phenomenon, and not just something that affects the citizens of Paris.

@SenTedCruz

Senator Ted Cruz

3 years

By rejoining the Paris Climate Agreement, President Biden indicates he’s more interested in the views of the citizens of Paris than in the jobs of the citizens of Pittsburgh. This agreement will do little to affect the climate and will harm the livelihoods of Americans.

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Zeke Hausfather

4 years

New UNEP Emissions Gap Report shows that current commitments are far from sufficient to meet Paris goals, and limiting warming to 1.5C is quickly "slipping out of reach" as emissions continue to increase. My latest at @CarbonBrief : 1/7

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@hausfath

Zeke Hausfather

9 months

Whats driving record-setting global temperatures in 2023? A switch from persistent La Niña conditions to a growing El Niño on top of warming from human emissions, with minor contributions from the solar cycle, the HT volcano, and marine low sulphur fuel standards.

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@hausfath

Zeke Hausfather

10 months

To say that global temperatures in July have been exceptional is an understatement. The monthly is on track to shatter the prior July record by a massive margin, be the warmest month in terms of both absolute temperatures and anomalies.

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@hausfath

Zeke Hausfather

7 months

And finally, here are all the daily temperatures since the JRA-55 record began, putting this year's extreme warmth into context:

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@hausfath

Zeke Hausfather

2 years

Electricity generation in the US from coal has fallen by 60% in just the past decade. I think a lot of us under-appreciate just how rapid and unprecedented a change we've seen in the power sector:

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Zeke Hausfather

3 years

There's grim news in the IPCC report, but also reasons for hope. We're flattening the curve of future emissions, and the darkest climate futures a decade ago are much less likely now. We can both celebrate progress and acknowledge how far we have to go: 1/

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Zeke Hausfather

3 years

CO2 emissions are flatting. This is good news, but it does not mean global warming will stop. Rather, it means that warming continues at the same rate rather than accelerating. To stop the world from warming we need zero emissions. This is the brutal math of climate change.

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Zeke Hausfather

3 years

We are in a very different world when Biden takes office in 2021 than we were at the start of the Obama administration in 2009. In the last decade we've succeeded in making clean energy cheap, and technology can go a long way in enabling more ambitious climate policy.

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Zeke Hausfather

3 years

We underestimate just how big a difference global warming can make to the likelihoods of extremes. 200 years ago odds of an event like the Pacific NW heatwave would have been 1 in 150,000 years With 1.2C global warming it was a 1 in 1,000 years At 2C it would be 1 in 10 years

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Zeke Hausfather

1 year

The world has warmed about 1.2C since the mid-1800s. Our best estimate is that all of this warming is due to human emissions of CO2 and other greenhouse gases. @carbonbrief

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Zeke Hausfather

1 month

The ship has largely sailed on limiting warming to 1.5C at this point, barring us getting very lucky with low climate sensitivity or actively geoengineering the climate. But there still are viable paths to limit warming to below 2C this century, as shown in the figure below:

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Zeke Hausfather

1 year

Global surface temperatures have increased by around 1.2C since the late 1800s. But the vast majority of that warming (about 1C of it) has occurred since 1970. At current warming rates the world is on track to pass 1.5C above preindustrial levels in early 2030s and 2C in 2060.

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Zeke Hausfather

4 years

Methane is a powerful greenhouse gas, and is responsible for about a quarter of the warming we have experienced to-date. Reducing methane emissions is an important part of climate mitigation. Its also important to understand that methane is very different from CO2. A thread: 1/9

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Zeke Hausfather

2 months

And, unfortunately, March is almost certain to keep this run of records going:

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@MaxCRoser

Max Roser

2 months

Last June was the warmest on record, last July too, last August too, last September too, last October too, last November too, last December too, last January too, and last February too.

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Zeke Hausfather

2 years

Carbon dioxide removal (CDR) is not the same as carbon capture and sequestration (CCS), and we need to stop inaccurately conflating the two. CDR removes atmospheric CO2. Its carbon negative. CCS (w/fossil fuels) reduces the amount of CO2 emitted. It's at best carbon neutral.

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Zeke Hausfather

4 months

Its now official: 2023 was the warmest year on record in the JRA-55 dataset, at 1.43C above preindustrial levels. It beat the prior record set in 2016 by 0.14C, and continues a rapid warming trend thats seen global temperatures rise around 1C since 1970.

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Zeke Hausfather

4 years

If anyone out there watched @MMFlint 's risible documentary trashing renewables because the construction of solar panels and wind turbines uses fossil fuels, you should know that their lifecycle impacts are tiny compared with either coal or gas generation:

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Zeke Hausfather

7 months

September temperatures are now out from our Berkeley Earth dataset. Looking at all the Septembers back to 1850 helps highlight just how anomalous this month has been:

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Zeke Hausfather

2 years

We often talk about climate change in terms of global averages, e.g. the world has warmed 1.2C since preindustrial. But no one lives in the global average; land areas have already warmed more than 1.8C on average, and many high latitude regions have already warmed more than 2C:

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Zeke Hausfather

3 years

The last 12 months have been the driest period in the Western US since records began in 1895. In a typical year the the western US gets around 17 inches of rain on average. Over the last 12 months we have only gotten 8.7 inches.

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Zeke Hausfather

1 year

There is a big problem today where countries and large companies are investing in forests and soil carbon to offset their fossil CO2 emissions. This fundamentally does not work from a physical climate perspective, and threatens to undermine net-zero targets. A thread: 1/12

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Zeke Hausfather

4 years

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Zeke Hausfather

3 years

The IPCC 6th Assessment Report features a new emissions scenario – SSP1-1.9 – limiting warming to 1.5C in 2100 with limited overshoot. It requires the world reach net-zero by 2055. However, under the hood it assumes a huge amount of negative emissions over the 21st century. 1/5

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Zeke Hausfather

7 months

Shutting down the Indian Point nuclear plant than vetoing the offshore wind that was planned to help replace its clean generation seems like a pretty bad decarbonization strategy on the part of New York.

@YanceyRoy

Yancey Roy

7 months

BREAKING: Veto is in now. Hochul cites local opposition. Says wind companies need to build positive relations with host communities.

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Zeke Hausfather

7 months

Similarly, we can look at a heatmap of every day of the year so far, where September stands out like a sore thumb:

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Zeke Hausfather

8 months

Your regular reminder that the only way to stop the world from continuing to warm is to get our CO2 emissions to zero. If emissions remain above zero, the world continues to warm. Conversely, the only way to cool the planet back down long-term is to remove more CO2 than we emit

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Zeke Hausfather

2 years

Today we released our 2021 temperature data from @BerkeleyEarth . It was the 6th warmest year on record, (5th for land, 7th for oceans). 25 countries and 1.8 billion people saw the warmest year on record. If the rate of warming continues we will pass 1.5C in 2033 and 2C in 2059.

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