The heterosphere is the layer of an atmosphere where the gases are separated out by molecular diffusion with increasing altitude such that lighter species become more abundant relative to heavier species. The heavier molecules and atoms tend to be present in the lower layers of the heterosphere while the lighter ones are present higher up. The exact boundaries between the different molecules vary according to temperature and solar activity.[1] The heterosphere extends from the turbopause to the edge of a planet's atmosphere and lies directly above the homosphere.[2]
Earth's heterosphereEdit
The volume fraction of the main gases in Earth's atmosphere according to height. The heterosphere is above about 100 km in the graph.
The Earth's heterosphere begins at about 100 km altitude and extends to the outer reaches of its atmosphere.[3] It incorporates most of the thermosphere and all of the exosphere. The major constituents of Earth's heterosphere are nitrogen, oxygen, helium, and hydrogen. Nitrogen and oxygen compose the lower portion of the heterosphere. In the higher levels of the heterosphere, above about 1,000 km, helium and hydrogen are the dominant species present.[3] The heterosphere also incorporates the ionosphere with ions present in the heterosphere's lower levels. These include O+, NO+, O2+, and N2+.[2] Due to the diffused nature of the heterosphere's gases, its density at any given height is not entirely dependent on the temperature. Other factors contributing to density variations in the heterosphere include day and night cycles, solar activity, geomagnetic activity, and seasonal cycles.[4] The heterosphere contains less than 0.001% of the Earth's atmosphere's total mass.[5]
ReferencesEdit
^"The Thermosphere: A Part of the Heterosphere" (PDF).
^"ATMOSPHERIC COMPOSITION TEMPERATURE AND FUNCTION". web.ccsu.edu. Retrieved 2019-05-30.
August 25, 2023
heterosphere, heterosphere, layer, atmosphere, where, gases, separated, molecular, diffusion, with, increasing, altitude, such, that, lighter, species, become, more, abundant, relative, heavier, species, heavier, molecules, atoms, tend, present, lower, layers,. The heterosphere is the layer of an atmosphere where the gases are separated out by molecular diffusion with increasing altitude such that lighter species become more abundant relative to heavier species The heavier molecules and atoms tend to be present in the lower layers of the heterosphere while the lighter ones are present higher up The exact boundaries between the different molecules vary according to temperature and solar activity 1 The heterosphere extends from the turbopause to the edge of a planet s atmosphere and lies directly above the homosphere 2 Earth s heterosphere Edit The volume fraction of the main gases in Earth s atmosphere according to height The heterosphere is above about 100 km in the graph The Earth s heterosphere begins at about 100 km altitude and extends to the outer reaches of its atmosphere 3 It incorporates most of the thermosphere and all of the exosphere The major constituents of Earth s heterosphere are nitrogen oxygen helium and hydrogen Nitrogen and oxygen compose the lower portion of the heterosphere In the higher levels of the heterosphere above about 1 000 km helium and hydrogen are the dominant species present 3 The heterosphere also incorporates the ionosphere with ions present in the heterosphere s lower levels These include O NO O2 and N2 2 Due to the diffused nature of the heterosphere s gases its density at any given height is not entirely dependent on the temperature Other factors contributing to density variations in the heterosphere include day and night cycles solar activity geomagnetic activity and seasonal cycles 4 The heterosphere contains less than 0 001 of the Earth s atmosphere s total mass 5 References Edit The Thermosphere A Part of the Heterosphere PDF a b OS411B M2 U1 P4 The Heterosphere www shodor org Retrieved 2019 05 30 a b Atmosphere gaseous envelope Encyclopedia Britannica Retrieved 2019 05 30 1965SAOSR 184 J Page 2 articles adsabs harvard edu Bibcode 1965SAOSR 184 J Retrieved 2019 05 30 ATMOSPHERIC COMPOSITION TEMPERATURE AND FUNCTION web ccsu edu Retrieved 2019 05 30 Retrieved from https en wikipedia org w index php title Heterosphere amp oldid 1149058108, wikipedia, wiki, book, books, library,
