There is an exception in deserts. 'otherwise in absence of sun we experience warmth in summers . in presence of sun also we experience chills at winters.
Sure dear Rumani, Sun is tge main source of heat (energy) on the Earth...
Yes, it dose. The core of the sun is so hot and there is so much pressure, nuclear fusion takes place.
This is convention. But there is another factor responsible for heat on earth. At night also the atmosphere is hot in absence of sun.
Earth is a sphere which has an atmosphere or air.
Sun is a sphere of fire and air. Fire and air are not affected by gravity. Fire is not a freely falling object. In the absence of air fire cannot exist on earth. What is there in the core of the sun? A matter like coal?This is assumption
Pretty much all the energy that arrives at the earth from the sun is electromagnetic radiation generated because the sun is hot. It has a particular spectrum called Black-body radiation characteristic of hot objects that are fairly absorptive of light.
What happens at winters? Where does the chill comes from during winters?
That is an interesting observation. The sun is a great ball of fire as a result of nuclear reactions. So it produces both heat and light. As such, the sun is the earth's main source of heat, however, since the earth is not flat and spins, a tilt causes the sun's rays to spread over a large area. This tends to reduce the suns heat felt in such regions
https://wtamu.edu/~cbaird/sq/2013/07/26/why-is-the-sun-cold-in-the-winter/
It is the warmth of the atmosphere that you feel on your skin. The atmosphere is warmed from the surface of the Earth. Visible light from the sun hits the surface of the Earth and some of it is absorbed, causing the Earth's surface to warm, which is re-radiated as infrared light and is then blanketed by our atmosphere.
نعم بالتأكيد إضافة إلى ما تعطيه الشمس من ضوء للأرض فإنها تبعث درجات الحرارة التي لها تأثيرات كثيرة على الكائنات الحية مع وجود الفصول الأربعة
According to the Cambridge Encyclopedia Of Earth Sciences (1982 edition ) 51% of earth's transferred energy comes from the sun. As for direct heating of the earth's SURFACE , the sun does not DO this DIRECTLY so far as I know (and here I am risking error). I hazard a discussion of Ultraviolet radiation in the earth "solar heating" process, which is very new considering over 100 types of the emitta have recently been discovered by the Solar Dynamics Observatory/ NASA in this wavelength ie UV or, "Extreme UV."
From an essay of mine NOT published in "accepted journals":
"Does irradiance fluctuation (flux) leave a mark on earth surface temperature? If it is even possible to determine, how is total temperature and pressure latitudinally, longitudinally, and height-wise distributed hemispherically? (Unique temperature/pressure ΔT( time)-curve constants purportedly valid for the whole hemisphere are omitted here due to their non-dynamical characteristics.)
Flux begs considering variation-mechanisms in Extreme UV (EUV) and its 100-petaled radiative emitta, or, rather, to those emitting magnetised plasma (this I hazard is the Spectral Solar Irradience or SSI element inside of Total Solar Irradience or TSI). To distinguish between them: (1) plasma emission lags behind UV radiance-variation by a year (Energetic Emission Delays or EEDs) and; (2) global temperature distribution-variation should be different according to the emitted source. The plasma emission-effects, working via cosmic ray modulation in the upper earth atmosphere should be stronger at higher geomagnetic latitudes. It also appears that Sun-correlated cloud formation is greater at high geomagnetic latitudes. It was found that cloud cover variations correlate with UV flux. One conclusion reached says cosmic ray flux variations might be deemed most important in long-term earth climate variation. Yet this does not rule out UV radiance variations’ possible influence, because the variation of the flux of ejected solar plasma is loosely correlated with it. Also, time lags as short as one-year EEDs cannot be observed. Correlations are not facts : problems with variable Total Solar Irradiance (TSI) and EUV remain.
Observational and theoretical tools exist by which earth latitude, longitude and height – regionally measured – reveal earth’s surface temperatures as a solar function. We recall Magnetic Sector Boundaries' (MSBs) effects on upper and lower earth latititudes showing pressure flip-flops; even effecting what kinds of weather occurs along with them. Particle coupling occurs via dynamic effects in the stratosphere/troposphere changing the lower atmosphere’s pressure gradients: the flux, probably the atmospheric chemistry. Variable TSI showed (regional) Arctic earth surface air temperature over the last one and a half centuries, to the present, in one study with 75% accuracy. It involved mechanistic descriptions of sea-thermohaline circulation, modulatory shifts in the Inter-tropic convergence zone rainbelt and tropical Atlantic Ocean conditions, as well as wind-driven subtropical and subpolar gyre circulation intensities (across both north Atlantic and north Pacific Oceans). Another study hinted that coupling happens with increased meridional circulation patterns leading to changing atmospheric structure in the troposphere. Recent regional sun-earth temperature research includes both Pacific and Atlantic aspects to the strongest earth-climate modulator known besides seasonal change - the El Nino Southern Oscillation (ENSO) - and Pacific trade wind oscillations (among others). "
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