We have entered the micro-season of “The Sky is Cold, Winter Comes”. This is the first micro-season of the mini-season Major Snow. All the micro-seasons within Major Snow are:
- The Sky is Cold, Winter Comes (Dec.07 -Dec. 11)
- The Bear Retreats to its Den (Dec. 12 -Dec 16)
- The Salmon Gather to Spawn (Dec. 17 -Dec 21)
These seasons were established in 1685 by Japanese astronomer Shibukawa Shunkai and are specific to Japan. However, just because the calendar focuses on Japan doesn’t mean it isn’t applicable to others. No matter where you live you can use these seasons as a starting point for your personal exploration of the world around you.
To celebrate this season, we will learn about how the Earth’s orbit around the Sun impacts our seasonal temperatures. Then we will read some seasonal haiku by Buson, Issa, Basho, Taigi, and Toshimi.
“The Sky is Cold, Winter Comes” marks the middle of the winter seasons in the 72-season calendar. This is also the time of year when those of us in the northern hemisphere begin to notice a drop in outside temperature. This drop in temperature is due to a variety of factors related to the Earth’s orientation to the Sun.
How Does The Sun Heat The Earth?
The Sun produces a lot of energy. Scientists call the energy produced by the Sun “Solar Radiation”. The earth absorbs about “240 watts of solar power per square meter (one watt is one joule of energy every second).”(1) This energy drives a variety of processes on Earth including the warming of the Earth’s surface.
The Earth’s surface temperature is regulated by incoming and outgoing energy. During the daylight hours, the earth receives more energy from the Sun than it is losing through things like convection. Convection is the “process by which heat is transferred by movement of a heated fluid such as air or water.”(2)
During the evening hours, the earth loses more energy than it receives. This loss of energy results in a drop in atmospheric temperatures.
How Does the Earth’s Orbit and Tilt Influence Temperature?
The Earth travels around the Sun in an elliptical orbit. The Earth also spins on its axis while traveling in its orbit. Because the Earth rotates around its fixed axis of 23.5 degrees different parts of the Earth receive different amounts of sunlight.
What this means is that in December the North Pole is titled away from the sun. Therefore, the northern parts of the Earth get less direct sunlight. This is directly opposite to the position of the North Pole in June. In June, the North Pole is titled towards the sun and the northern hemisphere gets more sunlight.(3)
The illustration below from NOAA SciJinks page does a wonderful job of illustrating this point.
As the Earth travels around the Sun, and we approach the winter solstice (December 21, 2022), the days get shorter. The shorter days mean there is less time for the sun to warm the earth and more time for the earth to lose its heat. This will therefore result in a drop in temperature.
How Does Latitude Influence Temperature?
Your location on the Earth greatly influences your seasonal temperatures. This is because the angle at which the Sun’s rays hit the Earth impacts the temperature. At higher latitudes, (farther away from the equator), the energy you receive from the Sun is more dispersed. However, if you live on the equator, the energy you receive from the Sun’s rays is more concentrated.
Climate scientists will also point out “Because the angle of radiation varies depending on the latitude, surface temperatures on average are warmer at lower latitudes and cooler at higher latitudes (even though higher latitudes have more hours of daylight during the summer months).”(4)
Other Factors That Influence Seasonal Temperatures
Besides the intensity of the Sun’s rays, the tilt of the Earth, and where the Earth is in its orbit around the Sun, there are still other factors that influence seasonal temperatures including altitude and large bodies of water.
Altitude: Temperature decreases as you travel higher in altitude. It is said “For every 100-meter increase in elevation, the average temperature decreases by 0.7°C.”(5)
Water: Large bodies of water influence temperature because they have a high heat capacity. What this means is that they take longer to warm and cool than dry land. Because of this, areas near large bodies of water tend to have more moderate temperatures.(6)
At this time of year, things are getting colder. The World Kigo Database tells us that “Cold” is not actually a kigo, but it is a topic for haiku.(7) This makes sense when you think about it. You can use the term “cold” in a variety of ways. For example, you can have a “cold spring morning”, or “cold soup”, or a “cold smile”.
In order to place “cold” directly in winter, you could say things like “cold winter evening”, “cold winter night”, or “cold winter morning”. However, there does seem to be a slight exception to this formula. That exception is “Cold Moon”.
“Cold Moon” or kan no tsuki is a winter kigo.(8) There are other slight variations of “Cold Moon” including “winter moon”, “freezing moon”, and “moon in the cold” which are also winter kigo.
With all this in mind, let’s read some seasonal haiku that focus on the Cold Moon and its variations.
this cold moon - among the bare trees three stalks of bamboo (retrieved from World Kigo Database)
this cold moon - fallen needles of pines shoot into stones (retrieved from World Kigo Database)
moon in the cold - only my own footsteps on the bridge (translated by Dr. Gabi Greve)
like he's biting the cold moon... gargoyle (translated by David G. Lanoue)
cold moon-- the blind priest is called by mistake (translated by David G. Lanoue)
a cold moon facing the cold mountain temple (translated by David G. Lanoue)
the snow and snow. this evening would have the great moon of December (retrieved from Masterpiece of Japanese Culture)
glittering flakes: the wind is breaking frozen moonlight. (retrieved from JapanPowered)
A Haiku Invitation
This week’s haiku invitation is to write a haiku or senryu that references Cold Moon, Cold Sky, or a variation of this.
Share your haiku in the comments below, or post on your own page and link back to this post. I can’t wait to read what you write!
- “Solar Radiation and the Earth’s Energy Balance”; Dawn Wells: Columbia University.
- Convection; Brittanica.com
- “Why Does Earth Have Seasons”; Scijinks
- “Angle of Solar Radiation and Temperature” Climate Science Investigations- South Florida
- “Elevation”; Climate Science Investigations-South Florida
- “Water’s Influence on Temperature”; Climate Science Investigations-South Florida
- “Cool, Cold, Chilly” World Kigo Database
- “Moon and its related links”; World Kigo Database
Buson’s and Tan Taigi’s haiku were retrieved from the World Kigo Database. Issa’s haiku were retrieved from David G. Lanoue’s Haiku Guy. Basho’s haiku was retrieved from Masterpieces of Japanese Culture. Horiuchi Toshimi haiku was retrieved from JapanPowered.com.
Very interesting and there are always some new things to learn.
Thanks for sharing and have a lovely weekend to come.
Yes! There is always something to learn! Thank you and have a great weekend too.
Reblogged this on Art, Music, Photography, Poetry and Quotations.
Thanks Mark for another great post, inspirational image and prompt. Happy Friday My Friend.
Hi Goff, Thanks for sharing the post and your work. Such a wonderful haiku for the season. Have a great weekend!
Cheers My Friend. Enjoy your day.
Nicely penned essay as always, Mark. I really liked Buson’s haiku about the three bamboo stalks. It’s such a stark and vivid image. Horiuchi Toshimi’s haiku (wind “breaking frozen moonlight”) is magnificent, too. I imagine the moon is pretty cold in your part of the world these days! It’s always a pleasure to read your articles. Well done. 🙂
Hi Mike, Thanks for the kind words! It is getting a little cold out here. We haven’t accumulated much snow yet. But it is on its way. So glad you enjoyed the haiku selection. There seems to be a lot of great winter haiku.
Hi Mark here is my response to this weeks prompt ‘Cold Moon’ ‘Cold Sky’
Happy Friday Everyone
Here’s my cold moon haiku. We have frost here in Scotland just now and the full moon sets off the winter scene beautifully. https://oddsends707138946.wordpress.com/2022/12/09/winters-night-by-britta-benson/
Hi Britta, Wonderful haiku! Thanks for writing and linking up! Have a good frosty weekend.
Thanks for a lovely and informative article Mark. Here’s my haiku ( in the form of a gembun) in response although you may have already seen it, or a variation, on Twitter …
a cold moon …
in it’s glow
Oh and here’s another – a monoku …
winter moon a twinkle in the snowman’s eye
Hi Clive, Thank you so much for sharing these. I really like the monoku! I am drawn to the possibilities in this line. Thanks so much for adding to the conversation!
a bright cold moon
Hi Eavonka, Thanks so much for adding to the discussion. I just looked up the sound of the screech-owl. How interesting! I bet that is a sound you remember once you hear it in the wild.
above and beyond
the clouds, where I cannot see
the cold moon holds water
Wonderful! I like the last line “the cold moon holds water”. It so inspires me to write a response haiku by flipping the last line. “above and beyond/where I cannot see/ the water holds the moon”.
Thanks so much for sharing and inspiring!
cold moon out of reach
watching it eyes unblinking
finally tears fall
Okay, not nearly as fun as the gargoyle haiku but it’s all I’ve got. 🙂
Hi Tracy, Well done! I will agree the the gargoyle one is my favorite for this season. Thanks for sharing. And, I noticed you posted your own haiku challenge. I’m pondering my response and will post shortly.
the cold moon
reflected in his eyes
~Nancy Brady, 2022
Hi Nancy, wonderful addition to the cold moon haiku collection! And the “snowy owl” haiku on your page is stellar! Thanks for sharing your work.
Thanks, Mark. That’s kind of you to say. Have a great weekend!
Hi, can’t believe it, I am early with this for me!! Great post and yes it’s very chilly here in Wales 🙂
Excellent additions to this week’s haiku! Thanks for writing and linking up! Have a great weekend.
Late to this party; title is the link to my post of; Cold Winter ‘ku
Hi Jules, wonderful collection of haiku for this one! Thanks for joining the conversation.
(We are having a heat wave – currently it is 28 F!! 🤣