Siphonia:
DAVIS SEA

by Chris Wayan, 2006

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Map of the Davis Sea region of Siphonia, a study of the Earth with 90% of its water drained away.

Davis Sea

This midsized sea is the southeastern corner of the old Indian Ocean.

Though Antarctica looms over Wilkes Coast, Davis's southern shore, all the tongues of Antarctic ice end a kilometer up and many miles inland; cold milky streams wind across a broad tundra to the sea. It's much like the cool tundras at the foot of the temperate-zone caps during our Ice Ages, where huge mammals grazed within sight of the ice. The high latitude (50-65 south) is countered by the basin's depth--fully twenty thousand feet below the ice cap. Cold winds off the glaciers compress so much they heat up. Air pressure is 1.5 atmospheres, retaining warmth and moisture.

So the east shore, Macquaria, is like British Columbia or northern Europe: forested down to the water, with mild but overcast winters and prone to rain, fog and mist all year. Conifers up to 75 m tall fill the valleys. It's plant heaven, but somber inland--dark unbroken forest. Most inhabitants live along the coast, though they export lumber all over the Davis basin (and beyond; many dry zones around the former Indian Ocean use Macquarian cedar and pine).

The western shore, under the rugged Gribb and Kerguelen Ranges, is a cool windy grassland, but forests root just a few miles inland, and straggle up the slopes in a belt over 100 km wide in places, and up to a mile high. Forests are patchier than Macquaria, but sunnier too; winters are colder (just as New York's or Tokyo's is colder than Vancouver's), but it can get genuinely hot in summer; the Kerguelen coast is the furthest from Antarctica.

Paulia, the long north shore, is also temperate--warm to hot in summer and with only light, occasional snows in winter, as mild as Macquaria's, and sunnier. It's the most populous land around the Davis Sea--more because of its sheer size than any real superiority of climate over Kerguelen.

Discordia: Strait or Canal?

Davis Sea may well be linked to the Diamantina Sea (part of the Australian Ocean) to the north. Though some Earth maps still show an unbroken mid-oceanic ridge between these basins, accurate newer maps will show a jagged fracture zone, though only one out of ten bothers to name it: the Australian-Antarctic Discordance, on Davis's northeast shore. With the new sea level, the Discordance is exposed: hundreds of km of fjords, many over a mile deep, one of which goes all the way through the highland very near the new sea level. Valley or channel? Do we call it Discordia Strait or will the locals have to dig the Discord Canal? The third possibility is that precipitation in the Davis Sea will be high enough to raise it a bit above its neighbors, until it spillls out through the Discordance--a salt-water river like the Bosporus. The Davis Sea is so big I doubt it'll ever become freshwater, even with a one-way flow; it's far bigger than the Black Sea, which is still salty.

No matter which hydrological scenario is right, we can expect the narrow point of this passage to nourish a great port, Discordia, handling all the shipping for the Davis Sea. Despite the name, it's probably a fun town; port cities tend to be tolerant and cosmopolitan, and Discordia's climate will be at least bearable for all the intelligent species I expect to find taking advantage of Siphonia's new ecological niches. The land itself encourages a diverse and rowdy cultural mix. And the scenery should be spectacular! Crags all round; the strait or canal's setting will rival Alaska's Inland Passage. Only warmer. A big, crazy terrarium full of fascinating creatures--all the fruits of 90,000 years of Darwinian fever (when the going gets tough, species get going).

Discordia illustrates the fact that the Davis Sea, whether or not it's part of the neighboring Australian Ocean, may be way out at the end of the complex of seas filling the old Indian and Atlantic basins--but though it's cut off by the Ninety East Ridge and the Kerguelen Range, it's still at about the same level; it's part of the complex. Siphonia's lowlands are truly split between the Pacific Basin, and everything else.

Map of Siphonia, a world-building experiment. Click a feature to go there.
TOURS

The following route snakes around Siphonia, covering most features (under construction)

  1. Arctic Valleys, sea level to 3 km high
  2. Atlantic Ocean (our N. and S.E. Atlantic), sea level
  3. African Ocean (S. Atlantic plus W Indian Ocean), sea level
  4. Bengal Sea (N. Indian Ocean), sea level
  5. Australian Ocean (E. Indian Ocean, Tasman Sea), sea level
  6. Davis Sea (S. Indian Ocean), sea level
  7. Anzac Basins (N.Z. to Australia), 0.5-2.5 km high
  8. Mornington Sea (S.E. Pacific) sea level
  9. Nazca Seas (E. Pacific), sea level to 1 km high
  10. Agassiz Basin (S. Pacific), 1 km down
  11. Pacific Ocean (central & N. Pacific), 1 km down
  12. East Asian Seas, 1-3.5 km high
  13. Javan Seas, 0.5-2.5 km high
  14. Australia, 4-5 km high
  15. Amazon Highlands and Andean Cap, 4-8 km high
  16. African Highlands, 5-6 km high
  17. Antarctic Cap, 4-5 km high (no, not 7-8!)
  18. European and Siberian Highlands, 4-6 km high
  19. Caribbean Lakes, 2-5 km high
  20. Canadian Highlands, 4-6 km high
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