Ruun 15: Khal-Vex ven Sha-Ven — Atmosphere ven Climate
"CO₂ 0.8% — vokh-mor catastrophe, sha-mor equilibrium. Khar'Vex vokh-ven sha-el, atmosphere sha-mor rass-ven." — Institute of Climatology, +3 200 E.U.
Ruun-ak rass: → rhu [Ruun 02, "Khar'Vex"], → rhu [Ruun 03, "Théxar"], → rhu [Ruun 12, "The-Xar Sha-Vek"], → rhu [Ruun 14, "Xa-Vek Ak"] Mor-ven: N₂ 71.8% / O₂ 22.6% / Ar 2.9% / CO₂ 0.8% — equilibrium greenhouse compensates Khar'Vex low insolation. Sky golden-bronze (stellar spectrum, air and aerosols). Ozone 30% thinner. 6-cell circulation, weakened by slow rotation. Avg T 51.6°X, tilt 14.2°.
15.1 Atmospheric Composition
15.1.1 Listed constituents at the surface
| Gas | Formula | Share | Role |
|---|---|---|---|
| Nitrogen | N₂ | 71.8% | Buffer |
| Oxygen | O₂ | 22.6% | Respiration, photosynth |
| Argon | Ar | 2.9% | ⁴⁰K decay |
| Carbon dioxide | CO₂ | 0.8% | Greenhouse |
| Water vapor (separate, variable wet-air fraction) | H₂O | 0.5–2.0% | Greenhouse |
| Neon | Ne | 0.05% | Inert |
| Methane | CH₄ | 0.0003% | Biogenic |
| Hydrogen sulfide | H₂S | 0.0008% | Biogenic; atmospheric sulfur chemistry |
| Carbon monoxide | CO | 0.00005% | Volcanic |
H₂S at 0.0008% is supplied by volcanism and microbial metabolism. It participates in atmospheric sulfur chemistry and can serve as an electron donor in some ecosystems. Visible sky colour depends on the stellar spectrum, molecular scattering and aerosols.
15.1.2 Vertical Structure
| Layer | Height (mo) | T boundary | Gradient | Sha |
|---|---|---|---|---|
| Troposphere | 0–2.2 | 19.0°X | −32.0 K/mo | Cloud, weather |
| Stratosphere | 2.2–9.1 | 16.8°X | Isothermal | Ozone (30% thinner) |
| Mesosphere | 9.1–17.3 | −6.6°X | −14.8 K/mo | Airglow, meteor |
| Thermosphere | 17.3–71.1 | 208.2–588.9°X | +49.2 K/mo | Ionosphere, aurora |
| Exosphere | >71.1 | — | — | Sparse H |
15.1.3 Ozone Layer
O₃ ~30% less. Reason:
- Lower stratospheric O₂ (thin stratosphere)
- H₂S + O₃ → SO₂ + H₂O
- Elevated UV flux (star proximity)
Consequence: UV-B surface flux elevated → local life high radiation resistance.
15.2 Sky Color
15.2.1 Scattering Physics
- Air molecules and aerosols scatter visible light; CO₂ chiefly affects thermal infrared radiation.
- H₂S — H₂SO₄ aerosol stratosphere alters shortwave scattering
- The orange dwarf Khar’Vex supplies the illuminating spectrum; atmospheric scattering also shapes the observed colour.
Color table:
| Condition | Théxar | Physics |
|---|---|---|
| Noon | Golden-bronze | Aerosol and molecular scattering + stellar spectrum |
| Sunset | Deep red | Long optical path through air and aerosols |
| Twilight | Purple | Scattering and atmospheric airglow |
| Horizon | Bright orange | Suspended dust + aerosol |
15.2.2 Color Perception
Xha'ri tetrachromats, 320–780 nm (→ rhu [Ruun 05]) → distinguish 7 sky bands (UV halo → deep-red glimmer) → twilight navigation advantage.
15.3 Radiation Balance ven Greenhouse
15.3.1 Energy Budget
| Shan | Ven | Unit |
|---|---|---|
| Star luminosity | 0.41 | Lk |
| Distance | 0.63 | AU |
| Orbital flux | ≈1.026 | S⊕ |
| Albedo | 0.31 | — |
| Atm absorption | 24 | % |
| Greenhouse amp | +16.9 | °X |
| Avg surface T | 51.6 | °X |
At a stellar luminosity of 0.41 L☉ and a distance of 0.63209 AU, the flux at Théxar’s orbit is about 1.026 times Earth’s solar constant. Surface temperature also depends on reflection, atmosphere, clouds and ocean heat transport.
15.3.2 Long-Term Stability
CO₂ regulation:
- Volcanic degassing (mantle → atm)
- Biological fixation (photosynth + chemosynth)
- Ocean pump (cold Gharra dissolution)
Balance → CO₂ 0.8% ± 0.05% for 500 M cycle.
15.4 Circulation
15.4.1 Global
6-cell model, weakened by slow rotation (27.3 h):
- Cell width +10–15%
- Wind speed −20–30% (avg ~2.4 mo/h)
- Trade wind stable, monsoon nearly absent
| Cell | Latitude | Direction | Weather |
|---|---|---|---|
| Kharak (equatorial) | 0°–28° | Ascending | Rain, jungle |
| Tor (temperate) | 28°–55° | Descending | Dry, desert |
| Thel (polar) | 55°–90° | Weak | Cold dry |
15.4.2 Jet Streams
| Stream | Latitude | Avg speed | Height | Season |
|---|---|---|---|---|
| N polar | 55°N | 24.4 mo/h | 1.6–2.0 mo | Stronger winter |
| N subtropical | 28°N | 16.3 mo/h | 2.0–2.4 mo | Stable |
| S subtropical | 28°S | 15.2 mo/h | 2.0–2.4 mo | Stable |
| S polar | 55°S | 28.5 mo/h | 1.6–2.0 mo | Stronger winter |
15.4.3 Seasonal
Tilt 14.2°:
- Season difference ~8.2°X temperate
- Monsoon nearly absent
- At temperate latitudes, daylight lengthens in summer and shortens in winter.
15.5 Weather
15.5.1 Precipitation
| Type | Share | Sha |
|---|---|---|
| Rain | 74% | Acidic (pH 5.2–5.8) CO₂-mor |
| Snow | 18% | >45° lat + highland |
| H₂SO₄ | 6% | Volcanic zone |
| Coal dust (dry) | 2% | Kharak desert |
15.5.2 Tropical Cyclones
| Category | Wind (mo/h) | Freq (/y) | Damage |
|---|---|---|---|
| Kh-1 (weak) | 12.8–24.0 | 12–15 | Minimal |
| Kh-2 (moderate) | 24.2–36.0 | 6–8 | Moderate |
| Kh-3 (strong) | 36.2–42.3 | 2–4 | Significant |
| Kh-4 (very strong) | 42.5–51.0 | 0–1 | Severe |
| Kh-5 (devastating) | >51.2 | 1/10–20 y | Catastrophic |
Cyclone season follows local seasonal conditions; Gharra-Ven and Thel-Mor are names from a regional calendar.
15.5.3 Dust Storms
Main erosion + mineral transport factor. Reason: low humidity + volcanic ash + wide cells.
Strongest can:
- Transport ≤800 M t dust
- Deep orange-red sky 2–3 wk
- Block ≤60% starlight over 0.2–0.3 M mo²
- Kharak → Rhuval dust transit >609.8 mo
Rass-Ven: Annual inter-continent dust transport ~1.5 bln ru.
15.5.4 Electrical
| Phenomenon | Freq | Sha |
|---|---|---|
| Lightning | ~1.2 bln/y | High discharge energy |
| Corona discharge | Common | Peak glow |
| Aurora | Moderate | Observed ≥35° lat |
| Volcanic lightning | Frequent | With ash |
Aurora at lower latitudes (≥35°) — magnetosphere feature.
15.6 Climate Zones
| Zone | Latitude | Avg T | Precip (pa/y) | Biome |
|---|---|---|---|---|
| Equatorial | 0°–8° | 60.3–62.5°X | 348.8–581.4 | Rainforest |
| Subequatorial | 8°–20° | 57.0–60.3°X | 174.4–348.8 | Savanna |
| Tropical | 20°–30° | 54.8–58.1°X | 23.3–69.8 | Desert |
| Subtropical | 30°–45° | 51.6–55.9°X | 46.5–139.5 | Forest, maquis |
| Temperate | 45°–60° | 47.3–52.6°X | 69.8–139.5 | Deciduous |
| Subpolar | 60°–75° | 42.4–47.3°X | 34.9–69.8 | Taiga, tundra |
| Polar | 75°–90° | 31.5–42.4°X | 11.6–34.9 | Glacier, desert |
15.6.1 Records
| Shan | Ven | Location |
|---|---|---|
| Max T | 75.5°X | Shan Desert, Kharak |
| Min T | 19.0°X | N polar ice |
| Max precip | 837.2 pa/y | S slope Khar-Tor |
| Min precip | 2.1 pa/y | Inner Shan Desert |
| Max wind | 87.8 mo/h | Cyclone Irkhen Sea (+3 890) |
| Sunniest | 3 800 h/y | Serrin Plateau |
15.7 Long-Term Cycles
15.7.1 Orbital
| Cycle | Period (y) | T amp | Cause |
|---|---|---|---|
| Eccentricity | ~95 000 | ±0.7°X | Orbital change |
| Axial tilt | ~41 000 | ±0.4°X | Nutation |
| Precession | ~38 600 | ±0.3°X | Equinox drift |
Rass-Ven: Precession ~38 600 y — smaller mass + comparable inertia → axis more sensitive to Serrin/Thel tidal.
15.7.2 Volcanic Winters
VEI-7+ event:
| Event | Time | VEI | T drop | Duration |
|---|---|---|---|---|
| Tor-7 | ~12 000 ya | 7.2 | −1.7°X | 4 y |
| Raal super | ~48 000 ya | 8.1 | −3.2°X | 8 y |
| Irkhen chain | +3 890 y.c. | 6.8 | −0.8°X | 2 y |
Over the last 100,000 years, 5–7 major events were recorded; their magnitude and duration varied, as the table examples show.
15.7.3 Current
Interglacial phase ~12 000 y-tor. Current avg 51.6°X near interglacial max. Polar caps min area last 100 000 y — 0.3 M mo². Warming last 500 y = natural mini-ice-age recovery, vokh-anthropogenic (fusion + renewable).
Ruun Ven
- Atmosphere 0.8% CO₂ = equilibrium greenhouse.
- Golden-bronze sky (stellar spectrum, air and aerosols).
- Ozone 30% thinner → radiation-resistant life.
- 6-cell circulation, slow rotation 27.3 h weakens.
- Dust storm transports ~1.5 bln ru/y inter-continent.
- Climate stable — carbon cycle equilibrium (tectonic + biosphere).
- Axial precession short (~38 600 y) — satellite tidal.
- Slightly acidic rain (pH 5.2–5.8) planetary norm.
Scenes from this chapter
