Connect with us

Energy

Soaking up the Sun: Visualizing the Changing Patterns of Daylight in One Year

Published

on

The darkest days are upon the residents of the Northern Hemisphere as daylight dwindles and the night lingers longer. Meanwhile, those in the Southern Hemisphere bask in their warmest and longest days—and those at the Equator continue to observe consistent days and nights.

These changing lengths of days and nights depend on where you are on Earth and the time of year. The tilt of the Earth’s axis and its path around the sun affect the number of daylight hours.

Today’s post highlights two simple and elegant animations that help demonstrate how different latitudes experience the sun’s light over the course of one year. The first comes from Reddit user harplass, while the second comes from data scientist Neil Kaye.

Longer and Shorter Days

The Ancient Greeks envisioned the movement of the sun as a Titan named Helios who rode across the sky in a horse-drawn chariot, illuminating the known world below. A rosy-fingered dawn would herald his imminent arrival, while the arrival of the dusk god Astraeus, ever on Helios’ heels, marked the passage of day into night.

Today, time is not at the whims of Greek mythology but by the measurable and consistent movement of celestial bodies. A day on Earth is 24 hours long, but not every day has 12 hours of daylight and 12 hours of night. The actual time of one Earth rotation is a little shorter–about 23 hours and 56 minutes.

Daytime is shorter in winter than in summer, for each hemisphere. This is because the Earth’s imaginary axis isn’t straight up and down, it is tilted 23.5 degrees. The Earth’s movement around this axis causes the change between day and night.

During summer in the Northern Hemisphere, daylight hours increase the farther north you go. The Arctic gets very little darkness at night. The seasonal changes in daylight hours are small near the Equator and more extreme close to the poles.

Length of a Rotation: Equinoxes and Solstices

There are four events that mark the passing stages of the sun, equinoxes and solstices.

The two solstices happen June 20 or 21 and December 21 or 22. These are the days when the sun’s path in the sky is the farthest north or south from the Equator. A hemisphere’s winter solstice is the shortest day of the year and the summer solstice the year’s longest.

Equinoxes and Solstices

In the Northern Hemisphere the June solstice marks the start of summer: this is when the North Pole is tilted closest to the sun, and the sun’s rays are directly overhead at the Tropic of Cancer.

The December solstice marks the start of winter when the South Pole is tilted closest to the sun, and the sun’s rays are directly overhead the Tropic of Capricorn.

The equinoxes happen around March 21 and September 23. These are the days when the sun is exactly above the Equator, which makes day and night of equal length.

Stand in the Place Where You Are

It is always darkest before the dawn, and every passing of solstice marks a time of change. As the Northern Hemisphere heads into the winter holiday season, it also marks the advent of longer days and the inevitable spring and summer.

The lengths of days and nights are constantly changing, but every one will get their time in the sun, at some point.

Subscribe to Visual Capitalist

Thank you!
Given email address is already subscribed, thank you!
Please provide a valid email address.
Please complete the CAPTCHA.
Oops. Something went wrong. Please try again later.

Continue Reading
Comments

Chart of the Week

Visualizing the Biggest Risks to the Global Economy in 2020

The Global Risk Report 2020 paints an unprecedented risk landscape for 2020—one dominated by climate change and other environmental concerns.

Published

on

Top Risks in 2020: Dominated by Environmental Factors

Environmental concerns are a frequent talking point drawn upon by politicians and scientists alike, and for good reason. Irrespective of economic or social status, climate change has the potential to affect us all.

While public urgency surrounding climate action has been growing, it can be difficult to comprehend the potential extent of economic disruption that environmental risks pose.

Front and Center

Today’s chart uses data from the World Economic Forum’s annual Global Risks Report, which surveyed 800 leaders from business, government, and non-profits to showcase the most prominent economic risks the world faces.

According to the data in the report, here are the top five risks to the global economy, in terms of their likelihood and potential impact:

Top Global Risks (by "Likelihood") Top Global Risks (by "Impact")
#1Extreme weather#1Climate action failure
#2Climate action failure#2Weapons of mass destruction
#3Natural disasters#3Biodiversity loss
#4Biodiversity loss#4Extreme weather
#5Humanmade environmental disasters#5Water crises

With more emphasis being placed on environmental risks, how much do we need to worry?

According to the World Economic Forum, more than we can imagine. The report asserts that, among many other things, natural disasters are becoming more intense and more frequent.

While it can be difficult to extrapolate precisely how environmental risks could cascade into trouble for the global economy and financial system, here are some interesting examples of how they are already affecting institutional investors and the insurance industry.

The Stranded Assets Dilemma

If the world is to stick to its 2°C global warming threshold, as outlined in the Paris Agreement, a significant amount of oil, gas, and coal reserves would need to be left untouched. These assets would become “stranded”, forfeiting roughly $1-4 trillion from the world economy.

Growing awareness of this risk has led to a change in sentiment. Many institutional investors have become wary of their portfolio exposures, and in some cases, have begun divesting from the sector entirely.

The financial case for fossil fuel divestment is strong. Fossil fuel companies once led the economy and world stock markets. They now lag.

– Institute for Energy Economics and Financial Analysis

The last couple of years have been a game-changer for the industry’s future prospects. For example, 2018 was a milestone year in fossil fuel divestment:

  • Nearly 1,000 institutional investors representing $6.24 trillion in assets have pledged to divest from fossil fuels, up from just $52 billion four years ago;
  • Ireland became the first country to commit to fossil fuel divestment. At the time of announcement, its sovereign development fund had $10.4 billion in assets;
  • New York City became the largest (but not the first) city to commit to fossil fuel divestment. Its pension funds, totaling $189 billion at the time of announcement, aim to divest over a 5-year period.

A Tough Road Ahead

In a recent survey, actuaries ranked climate change as their top risk for 2019, ahead of damages from cyberattacks, financial instability, and terrorism—drawing strong parallels with the results of this year’s Global Risk Report.

These growing concerns are well-founded. 2017 was the costliest year on record for natural disasters, with $344 billion in global economic losses. This daunting figure translated to a record year for insured losses, totalling $140 billion.

Although insured losses over 2019 have fallen back in line with the average over the past 10 years, Munich RE believes that long-term environmental effects are already being felt:

  • Recent studies have shown that over the long term, the environmental conditions for bushfires in Australia have become more favorable;
  • Despite a decrease in U.S. wildfire losses compared to previous years, there is a rising long-term trend for forest area burned in the U.S.;
  • An increase in hailstorms, as a result of climate change, has been shown to contribute to growing losses across the globe.

The Ball Is In Our Court

It’s clear that the environmental issues we face are beginning to have a larger real impact. Despite growing awareness and preliminary actions such as fossil fuel divestment, the Global Risk Report stresses that there is much more work to be done to mitigate risks.

How companies and governments choose to respond over the next decade will be a focal point of many discussions to come.

Subscribe to Visual Capitalist

Thank you!
Given email address is already subscribed, thank you!
Please provide a valid email address.
Please complete the CAPTCHA.
Oops. Something went wrong. Please try again later.

Continue Reading

Energy

The Periodic Table of Commodity Returns

Which individual commodities were the best performers in 2019, and how do those numbers compare to the past decade of data?

Published

on

The Periodic Table of Commodity Returns 2019

In 2019, every major asset class finished in the black.

And although the broad commodity market finished up 17.6% on the year, the performances of individual commodities were all over the map. For those familiar with the sector, that’s pretty much par for the course.

That said, the lack of an obvious correlation in commodity markets also makes for a thought-provoking and humbling exercise: comparing the annual returns of commodities against the data from the past decade.

A Decade of Commodities (2010-2019)

Today’s visualization comes to us from U.S. Global Investors, and it compares individual commodity returns between 2010 and 2019.

You can use the interactive tool on their website to toggle between various settings for the table of commodity returns, such as breaking them down by category (i.e. energy, precious metals, etc.), by best and worst performers, or by volatility over the time period.

Let’s dive into the data to see what trends we can uncover.

Palladium: The Best Commodity, Three Years Straight

In 2019, palladium finished as the best performing commodity for the third straight year — this time, with a 54.2% return.

Palladium top performing commodity

You could have bought the precious metal for about $400/oz in early 2010, when it was a fraction of the price of either gold or platinum.

Nowadays, thanks to the metal’s ability to reduce harmful car emissions and an uncertain supply situation, palladium trades for above $2,000/oz — making it more expensive per ounce than both gold and platinum.

Oil and Gas: Opposite Ends of the Spectrum

As key energy commodities, oil and natural gas have an inherent connection to one another.

However, in 2019, the two commodities had completely diverging performances:

Palladium top performing commodity

Crude oil prices gained 34.5% on the year, making it one of the best commodities for investors — meanwhile, natural gas went the opposite direction, dropping 25.5% on the year. This actually cements gas as the worst performing major commodity of the decade.

“That’s Gold, Jerry!”

Finally, it’s worth mentioning that gold and silver had a bounceback year.

Gold gained 18.3% to finish with the best return the yellow metal has seen in a decade. Silver followed suit with a similar story, rallying 15.2% over the calendar year.

Gold and silver performance

Precious metals now sit at multi-year highs against an interesting economic and geopolitical backdrop to start 2020.

Where do you see the above commodities ending up on next year’s edition of the rankings?

Subscribe to Visual Capitalist

Thank you!
Given email address is already subscribed, thank you!
Please provide a valid email address.
Please complete the CAPTCHA.
Oops. Something went wrong. Please try again later.

Continue Reading
Gen III Company Spotlight

Subscribe

Join the 130,000+ subscribers who receive our daily email

Thank you!
Given email address is already subscribed, thank you!
Please provide a valid email address.
Please complete the CAPTCHA.
Oops. Something went wrong. Please try again later.

Popular