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Rain graces the Alaska landscape

Posted: August 9, 2013 - 12:00am
Rain on an aspen tree.   Photo by Ned Rozell
Photo by Ned Rozell
Rain on an aspen tree.

In warm Alaska summers like this, in which Fairbanks has set a record for most 80-degree Fahrenheit days and Anchorage has exceeded 70 with similar frequency, rainfall has been a phenomenon many people have not missed.

But even though we are a species that scurries when water falls from the sky, rain is more essential to our survival than pleasant, dry breezes. Rain is, after all, the free distribution of a substance more valuable than gold. And, despite places like Southeast’s Little Port Walter — where residents endure 80 days each year with precipitation amounts greater than one inch, most of it in the form of rain — most Alaskans don’t get much of it.

Especially when you consider Mount Waialeale in Hawaii, where it rains more than an inch every single day. Or Cherrapunji, India, which experienced more than 1,000 inches of rain from August 1860 to August 1861.

As for daily deluges, it’s hard to beat Reunion Island, located in the Indian Ocean east of Madagascar. During the 24 hours from March 15 to 16, 1952, the black sands of the island absorbed 74 inches of rain. And it was impossible to keep the picnic lunches dry in Unionville, Maryland during the minute on July 4, 1956 when 1.23 inches of rain burst from the sky.

Alaska doesn’t come close to those extremes, but Barrow stands out for the opposite. In 1934, weather observers there recorded 1.4 inches of precipitation for the entire year. That’s nothing compared to the 14 consecutive years without a raindrop in Arica, Chile, or the 767 days from 1912 to 1914 between rainfalls in Bagdad, California. But Barrow’s dry year is similar to a typical year in Death Valley, which explains why umbrella sales are sluggish in both Barrow and Badwater.

A bit of research reveals that it is poor form for Alaskans to shake a fist at the sky during the few months the air is warm enough for rain to exist here. The wet phenomenon is more miracle than nuisance. As Jerry Dennis explains in It’s Raining Frogs and Fishes, rain is about the closest thing we have to constancy on Earth:

“Chances are good that the drop of rain that splashes on your forehead is made of molecules that were here long before the first humans looked up in wonder at a cloudy sky, long before the first leafy plants stretched their roots into the soil, long before the first single-celled organisms took the critical step of dividing in half to reproduce.”

Droplets splattering on our blue tarps have fallen before, perhaps cooling the slaves who shoved giant stone blocks into pyramids in Egypt, or soaking the soldiers knee deep in muck and mosquitoes as they built the Alaska Highway.

As in every Alaska summer, this recycled liquid air freshener has captured billions of soot and dust particles, pulling them from the sky and slamming them quietly to the ground. Rain is also the only substance known to quench our wildfires, and it humidifies the air to the point where our noses become receptive to the delightful musk of the earth.

Further, this falling liquid water is, as far as we know, unique to our home planet. This rarity highlights a most fortuitous fact: Earth orbits the sun at about 93 millions miles, a favorable distance for a species that for its comfort depends on both air conditioning and down jackets. We live far enough away from the sun to keep our flood-swollen rivers from boiling away, yet close enough to keep all this precious moisture from being locked up, unusable, in a hard shell of ice.

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