Climate Change Impacts in Anchorage

Climate Change Impacts in Anchorage

March 2016

Download the Fact Sheet (PDF)

Climate changes will impact the entire Anchorage community. Businesses of all sizes are an important part of the community, and will experience many different risks, such as disruptions to their supply chain, financial losses from extreme events, and threats to the health and safety of their employees. The business community in Anchorage can work together with city and state agencies, along with other stakeholders to evaluate potential risks and take steps toward enhancing the community’s resilience. 


Approaches to Structuring a High Ambient Temperature Exemption

Approaches to Structuring a High Ambient Temperature Exemption 

March 2016

By Steve Seidel, Jennifer Huang, and Stephen O. Andersen

Download the Brief (PDF)

As parties to the Montreal Protocol consider an amendment to phase down hydrofluorocarbons (HFCs), one critical concern is whether suitable alternatives for air-conditioning applications are available and adequately demonstrated for cooling capacity and energy efficiency under conditions of high ambient temperatures. Given the critical importance of these applications, one option being considered by parties is to provide a time-limited exemption for those uses in countries that could be adversely impacted by high ambient temperatures. This paper looks at a number of options for how such an exemption might be structured.

Jennifer Huang
Stephen O. Andersen
Stephen Seidel

2015 was the warmest year on record

Image courtesy NOAA

This visualization from NOAA shows much warmer than average or record warm temperatures across much of the globe in 2015, the warmest year on record.

The data are in, and 2015 was officially the warmest year globally ever recorded. We’ve been keeping temperature records since 1880. The last time the record was broken? 2014.

What’s interesting is just how much warmer 2015 was. The observed annual average surface temperature was more than 1.8° F (1° C) above the 19th century average, according to the National Oceanic and Atmospheric Administration (NOAA) and the National Aeronautics and Space Administration (NASA). That’s already half the warming countries have agreed to as the international limit.

And 2015 was about a quarter of a degree Fahrenheit warmer than 2014. That might seem small, but it’s actually huge when compared to the year-to-year differences observed in the record.

A strong El Niño, when the surface ocean in the Eastern Pacific basin warms, contributed to the record warmth of 2015. But even compared to other El Niño years, 2015 set records. The agencies reporting the data attribute this to the long-term warming trend due to the increase of greenhouse gases in the atmosphere.

As with all climate and weather data, the 2015 data shows some variability. Not all locations set high temperature records, and parts of the North Atlantic Ocean actually set a cold temperature record.

In the contiguous United States, 2015 was the second warmest year on record, with 2012 still holding the top spot. It was the 19th consecutive year that the annual average U.S. temperature was more than the 20th century average.

Attributing extreme weather events to climate change

It is well known that climate change will alter the occurrence of extreme weather events like heat waves, droughts, and severe storms. But weather is unpredictable and naturally variable, so how can we be sure climate change is happening today?

Climate change attribution

Scientists have recently developed tools for so-called event attribution, to say (through the use of statistics) whether a particular extreme weather event is caused by climate change. The fourth annual report on event attribution was just published in the journal Bulletin of the American Meteorological Society (BAMS). Researchers around the globe used different methods to assess 28 events that occurred in 2014. They found that some of these events probably would not have happened without climate change.

Why ‘probably’?

Any individual weather event is a part of a chaotic and complex system (yes, those are the technical terms). Because of this, it is theoretically impossible to predict weather over any meaningful timescale. So scientists turn to probabilities.

When your local weather forecaster tells you there’s a 30 percent chance of rain, that number doesn’t come out of a hat. The percentage comes from many weather models run over and over again. A 30 percent chance of rain tomorrow means that for every 100 model simulations of the weather tomorrow, 30 had rain.


Significant progress toward limiting HFCs under the Montreal Protocol

In an important breakthrough, parties to the Montreal Protocol meeting in Dubai have agreed to a path forward aimed at phasing down hydrofluorocarbons (HFCs), a class of highly potent greenhouse gases. This progress adds to the momentum leading up to the UN climate talks starting later this month in Paris.

HFCs, chemicals widely used in refrigeration, air conditioning, and foam blowing, were developed in response to limits on ozone-depleting substances under the Montreal Protocol.

The United States and 40 other countries had put forth a range of proposals this year for phasing down HFCs. While these efforts fell short of producing a consensus amendment, extensive discussions throughout the week resulted in a path toward delivering an HFC phasedown amendment at a special, additional meeting of the parties to be held in 2016.

Are 2015's extreme weather events driven by climate change or El Niño?

Hurricane Patricia (Photo: NASA Earth Observatory)

Record warmth, increased precipitation, and more intense tropical cyclones.

These are just a few of the consistent predictions from models investigating our future in a world with climate change. Or, it’s a list of some of the impacts of the periodic weather pattern called El Niño.

So which one has been driving some of this year’s extreme weather events?

A record year for Pacific tropical cyclones

The National Hurricane Center reports that eight major hurricanes (Category 3 or higher) have developed in the eastern North Pacific Ocean so far this season. This is consistent with the characteristics of El Niño that have been shaping up over the course of the year.

During an El Niño year, the surface ocean in the Eastern Pacific basin warms (it’s usually very cold) and the trade winds in the area weaken. These two meteorological developments favor the formation of tropical cyclones, the general term that includes hurricanes and related systems. Hurricane Patricia achieved record strength in a record short period of time this month, becoming the strongest Pacific hurricane to make landfall. Meanwhile, climate change will probably not change the number of hurricanes overall, but warmer ocean surface temperatures and higher sea levels are expected to intensify their impacts.

Driver: El Niño


New commitments to reduce HFCs show leadership

The fastest growing family of greenhouse gases – extremely potent hydrofluorocarbons (HFCs) -- aren’t going to be growing as fast in the future.

Today’s White House announcement of voluntary industry commitments to reduce hydrofluorocarbons (HFCs), along with new regulations put in place over the past year, have created game-changing shifts toward more environmentally friendly alternatives.

Developed as substitutes for ozone-depleting chlorofluorocarbons (CFCs) in the late 1980s, HFCs have become widely used worldwide in refrigerators, air conditioners, foam products, and aerosols. While they don’t contribute to ozone depletion, HFCs can trap 1,000 times or more heat in the atmosphere compared to carbon dioxide. This means they have a high global warming potential (GWP).

The amount of these compounds produced around the world has been growing at a rate of more than 10 percent per year. Unless controlled, emissions of HFCs could nearly triple in the U.S. by 2030. Strong international action to reduce HFCs could reduce temperature increases by 0.5 degrees Celsius by the end of the century, a critical contribution to global efforts to limit climate change.

The 16 voluntary industry commitments that make up today’s announcement highlight the innovation and leadership U.S. industry is showing in meeting the challenges of addressing climate change. These actions build on 22 commitments made by industry at a White House event just a year ago.

Weathering the Next Storm: A Closer Look at Business Resilience, Executive Summary

Weathering the Next Storm:
A Closer Look at Business Resilience
Executive Summary

September 22, 2015

By Katy Maher and Janet Peace

Download the Brief (PDF)

Infographic with key takeaways
and recommendations.


Increased extreme weather and climate-related impacts are imposing significant costs on society and on companies. While businesses are increasingly taking steps to assess risks and prepare for future climate changes, many companies face internal and external challenges that hinder efforts to move toward greater climate resilience. Building and expanding on an earlier review completed in 2013, C2ES examined how large companies are preparing for climate risk, who they are partnering with, and what is keeping them for doing more.

Janet Peace
Katy Maher

Are businesses prepared for climate impacts?

Increased extreme weather and climate-related impacts are imposing significant costs on communities and companies alike. While some businesses are taking steps to assess and address climate risks, many face internal and external challenges to building climate resilience.

In a new report, Weathering the Next Storm: A Closer Look at Business Resiliencereleased at Climate Week NYC, C2ES examined how major global companies are preparing for climate risks, and what is keeping them from doing more.

C2ES reviewed public disclosures of S&P Global 100 companies, conducted in-depth interviews, and held workshops with business leaders, government officials, academics and other stakeholders. Key findings include:

Major companies recognize and report climate risks.

We found 91 of the world’s largest 100 companies see extreme weather and other climate impacts as business risks. Business leaders see climate risks firsthand – in damaged facilities, interrupted power and water supplies, disrupted supply and distribution chains, and impacts on their employees’ lives.

Most (84 companies) discussed climate risk concerns in CDP questionnaires. Fewer companies did so in their sustainability reports (47) or financial filings (40).

More companies are assessing their vulnerabilities.

The vast majority of companies rely on existing risk management or business continuity planning to address climate risks.

Many see climate change as a “threat magnifier” that exacerbates risks they already know and understand. This lens puts climate change into a familiar business context, but companies could overlook or underestimate the threats they face.

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