Zapytanie 1

Imagine that Earth has axial tilt of 31°18'54".36, one year lasts 136.35 current Earth days, and one day lasts 1.813 current Earth days or about 44 hours. What would happen?

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Thought for 36 seconds

Great little thought-experiment — lots would change, and quickly. I’ll assume you mean a physically consistent scenario: the planet still orbits the same star (the Sun), so a shorter “year” implies a smaller orbital radius. I’ll give the key numbers first, show the calculations, then explain the main climatic, oceanic, atmospheric and biological consequences.

Key numbers (computed)

Given: axial tilt (obliquity) = 31°18′54″.36 ≈ 31.315° (vs Earth’s ~23.44°).
Given: year = 136.35 current Earth days (vs 365.25 d).
Given: day = 1.813 current Earth days ≈ 43.51 hours (≈ 44 h).
These imply:
- Semi-major axis ≈ 0.518 AU (by Kepler’s 3rd law: a ∝ T^(2/3)).
- Solar constant at this distance ≈ 5,063 W/m² (today’s Earth average ≈ 1,361 W/m²).
- Incoming sunlight ~3.72× stronger than today.
- Planet effective black-body temperature scale factor ≈ 1.389 → effective temperature up ~39% (for Earth’s 255 K → ~354 K). If you scale current mean surface ~288 K by the same factor you get ~400 K (≈ 127 °C) — a rough indicator that surface would be far hotter than present Earth absent major atmospheric change.
- Days per year ≈ 136.35 / 1.813 ≈ 75.21 rotations per orbit (so ~75 day-night cycles per year).
- Length of a season (quarter year) ≈ 34.09 current days ≈ 18.8 local days (local day = 44 h).
- New polar circle latitude = 90° − obliquity ≈ 58.685° (vs current ≈ 66.56°). Tropics extend to ±31.315° (vs ±23.44° now).

Short summary of the biggest effects

Much stronger sunlight — enormous warming, likely runaway greenhouse.

Moving to 0.518 AU increases stellar flux ~3.7×. Unless the atmosphere and albedo were completely different, surface temperatures would rise enormously. Even with Earth’s current atmosphere the global mean surface temperature estimate becomes extremely high (~400 K by a simple scaling), enough to boil oceans, lead to massive water vapor, and trigger runaway greenhouse processes (water vapor is a strong greenhouse gas). Long story: surface habitability like today’s Earth would likely be lost unless the atmosphere and reflectivity are radically different.

Much stronger seasons in terms of latitudinal contrast.

Higher obliquity (31.3°) increases seasonal contrast: mid-latitudes and tropics have larger annual swings in solar angle. The tropics widen (to ±31.3°) and the polar circle moves equator-ward (to ≈58.7°), so areas that currently never have true polar day/night would now. If the planet were still temperate somehow, summers would be hotter and winters colder in many places.

Longer day (≈44 h) — slower rotation: big atmospheric circulation changes.
1. Angular rotation rate drops to ≈ 55% of Earth’s current value. Coriolis forces are weaker (≈55% as strong), so the atmosphere’s dynamical regimes change: Hadley cells expand poleward, mid-latitude jet streams weaken and move, and storms become larger, slower and more meridional. Expect broader tropical circulation, fewer but larger weather systems in mid-latitudes.
2. Longer day-night cycles make diurnal temperature swings larger (longer daytime heating and longer nighttime cooling). Deserts or otherwise dry regions could become much hotter in day and much colder at night (unless massive atmosphere moderates that).
Faster orbit (shorter year) — seasons are shorter in absolute time.

The year is ~136 days, so seasons last ~34 Earth days (≈19 local days). That means organisms and ecosystems would have to complete seasonal cycles more rapidly (but note that absolute time of a season is shorter — less time for slow seasonal processes). Combined with much higher insolation, this shortens growing windows and alters phenology dramatically.

Strong risk of ocean loss and altered hydrological cycle.

Higher insolation vaporizes more water; increased water vapor increases greenhouse forcing (positive feedback). If the planet warms enough, you can enter a moist or runaway greenhouse, where oceans evaporate, water is lost to space (photodissociation + hydrogen escape), leaving a dry, hot world (Venus-like outcome is plausible).

Surface/land effects, erosion and geology.

If oceans largely evaporate, weathering regimes change, carbon cycle is disrupted, volcanism and tectonics continue but with different climate feedbacks. Reduced equatorial bulge (because rotation is slower) slightly changes shape and sea level geometry, but that is minor compared with atmospheric changes.

'Tides and lunar effects.

Solar tidal forcing increases (Sun is closer), so solar tide amplitude increases. Lunar tides depend on the Moon’s distance; relative timing of tides and the longer rotation means tidal rhythms (e.g., semi-diurnal vs diurnal) change. If the Moon remained as today, tidal patterns would be different but still important for coastal dynamics.

Biosphere and human implications.
1. Plants and animals would have to evolve (or be engineered) for stronger heat stress, higher UV and shorter seasons. Photosynthesis rates might increase under intense light, but high temperature and drought stress could prevent net benefit.
2. Human daily life with ~44-hour days is feasible (humans can adapt circadian cycles), but the heat load and environmental extremes would be the limiting factor. Agriculture would require protective systems (shade, cooling, irrigation) if possible at all.
3. If oceans survived, ocean circulation would change (weaker Coriolis → fewer gyres, different upwelling), affecting marine life and productivity.

More detail on selected items

Insolation and temperature — numbers again

Solar constant ≈ 5,063 W/m² (vs 1,361 W/m² at 1 AU).
Simple black-body scaling suggests effective temperature increase factor ≈ 1.389; surface mean (naïve scale of 288 K × 1.389) → ≈400 K. That’s a rule-of-thumb that indicates severe overheating. Real climate depends on atmosphere, clouds, albedo; but the magnitude of extra energy is so large that normal feedbacks (clouds, increased albedo) are unlikely to prevent major warming.

Obliquity effects

Tropics broaden to ±31.3° → zones that were temperate could become tropical.
Polar day/night zones begin at ≈58.7° latitude instead of ≈66.6° → much more of each hemisphere experiences continuous daylight/darkness around solstices.

Rotation / winds

Rotation rate is ~0.552 of current → Rossby number increases (less rotational control), Hadley cell expands, midlatitude storm tracks migrate and weaken, storms are fewer but larger. Wind directions and strengths will reorganize — higher thermal contrasts can create intense regional winds, but the classic narrow fast jet stream would be weaker and broader.

Season count and human calendar

≈ 75 local days per year (75 sunrises). Seasons ~19 local days long. Calendar-wise you could still have months, but the rhythm of agriculture, migration and life cycles would compress.

Two caveats / alternative interpretations

If you only changed the “year” in the calendar but left orbital radius unchanged, then you’d be forcing an impossible physical constraint (orbital period is set by star+orbit). If the planet somehow orbited the Sun faster without moving inward (e.g., the Sun got more massive or physics changed), the insolation consequences could be different. The physically consistent route is what I used: shorter year ⇒ closer to star ⇒ much higher incoming flux.
If atmospheric composition and albedo were adjusted (for example, very high planetary albedo, reflective aerosols/clouds, or a very different atmosphere), you could moderate temperatures. But to offset ~3.7× more incoming energy you’d need huge increases in reflectivity or radically different atmospheric physics; that’s an extreme engineering change.

Bottom line (tl;dr)

With a 136.35-day year and a 44-hour day (physically consistent → orbit at ~0.52 AU), Earth would receive ~3.7× more sunlight. That would almost certainly produce extreme global warming and probably a moist/runaway greenhouse — oceans boil away, habitability like today’s Earth is lost. The increased obliquity (≈31.3°) would strengthen seasonal contrasts and move polar phenomena equator-ward. The slower rotation (≈44 h day) would weaken Coriolis effects, broadening tropical circulation and changing weather patterns. If you want a survivable world with those day/year numbers, you’d need dramatic changes to atmosphere, albedo or star brightness — effectively redesigning the planet.