Climate

Climate is a descriptor used by the IISS to denote average planetary temperate ranges.

• It is not designated in the UWP, but it was semi-regulated by the time of the T5SS using trade codes.

Description / Specifications

No information yet available.

• Trade Classification
• Climate and Density Key

T5SS Climate Categories Table

The descriptors are as follows:

T5SS Climate Categories

Climate:	Temperature Range: (Degrees Celsius)	T5SS TC:	Lifeforms:	Remarks:
Vacuum (none)	Extreme: Almost always cold or frozen.	Va (vacuum) As (asteroid or planetoid)	Unconventional Life or Exotic Life (extremophile)	Impossible: Habitation is almost always impossible without extensive technology. Usually associated with worlds without atmospheres. In such cases, the climate of the world is often determined by mean distance from the local star.
Frozen (frigid)	Below -30	Fr (frozen) Ic (iceworld)	Conventional Life (cryomorph)	Nigh Impossible: Habitation is near impossible without technology.
Very Cold	-30 to -20	Vc (very cold) Ic (iceworld)	Conventional Life (hypercryophile)	Not Hospitable: Habitation is very difficult.
Cold	-20 to -5	Co (cold) Ic (iceworld)	Conventional Life (cryophile or psychrophile)	Unhospitable: Habitation is difficult.
Chilly	-5 to 5	Ch (chilly)	Conventional Life (normative: mesophile)	Semi-Hospitable: Still marginally habitable. 0 degrees C = freezing point of water.
Cool	5 to 15	Tu (tundra) Nrm- (cool normal)	Conventional Life (normative: mesophile)	Hospitable: Still habitable. In the Habitable Zone or Goldlilocks Zone.
Normal (optimal)	15 to 25	Tp (temperate) Ga (garden or gaia) Nrm (normal)	Conventional Life (normative: mesophile)	Very Hospitable: Very conducive to life. Almost every Garden World or Terra-prime world possess this ideal climate. In the Habitable Zone or Goldlilocks Zone.
Warm	25 to 40	Wa (warm) Nrm+ (warm normal)	Conventional Life (normative: mesophile)	Hospitable: Still habitable. In the Habitable Zone or Goldlilocks Zone.
Tropical	40 to 50	Tr (tropical)	Conventional Life (normative: mesophile)	Semi-Hospitable: Still marginally habitable.
Hot	50 to 60	Ho (hot)	Conventional Life (thermophile)	Unhospitable: Habitation is difficult.
Very Hot	60 to 70	Vh (very hot)	Conventional Life (hyperthermophile)	Not Hospitable: Habitation is very difficult. Inferno worlds.
Infernal (torrid)	70+	If (infernal)	Conventional Life (thermomorph)	Nigh Impossible: Habitation is near impossible without technology. 100 degrees C = boiling point of water. Typical of hellworlds, insidious worlds, many radworlds, and worlds with too many greenhouse gases. Venus (SR 1827) (world) is typically thought of as an exemplar world for this category.
Variable (chimeric)	Extreme: Variable	Lk (locked: satellite or moon) Tz (twilight zone: mainworld)	Unconventional Life or Exotic Life (extremophile)	Impossible: Habitation is almost always impossible without extensive technology. Often reserved for worlds that have large variations in temperature due to eccentric orbits or significant axial tilts.

History & Background / Dossier

No information yet available.

References & Contributors / Sources

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• GURPS Traveller: First In
• Author & Contributor: Garnfellow
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science