what is the reason for winters being so harsh

Axial Tilt:The Earth is tilted on its axis at an angle of approximately 23.5 degrees. This tilt is crucial in determining the seasons. During winter in a particular hemisphere, that hemisphere is tilted away from the Sun. As a result, sunlight is spread over a larger surface area, leading to lower temperatures. Earth's orbit around the Sun is elliptical. While the axial tilt determines the seasons, the varying distance from the Sun during the Earth's orbit also plays a role. When the Earth is farther from the Sun during winter, the sunlight received is less intense, contributing to colder temperatures. In winter, days are shorter, and nights are longer. The reduced duration of daylight means that there is less time for the Sun to heat the surface. This results in lower overall temperatures during the winter months. The Sun's angle in the sky is lower during winter. Sunlight has to pass through a larger portion of the Earth's atmosphere, dispersing energy and reducing its intensity. This contributes to the lower temperatures experienced during winter. Land heats and cools more quickly than water. In winter, the large landmasses in the northern hemisphere cool rapidly, leading to the formation of high pressure systems. These systems bring cold air from the Arctic region, intensifying winter conditions. Ocean currents play a role in moderating temperatures, but they can also influence the severity of winters. Warm ocean currents can mitigate the cold in coastal areas, while cold currents can contribute to cooler conditions. Features such as mountain ranges and elevation contribute to the variation in winter conditions. Mountainous areas experience colder temperatures, and the windward sides of mountains often receive more precipitation in the form of snow. The polar vortex, a large area of low pressure and cold air surrounding the Earth's poles, can influence winter weather. Disruptions in the polar vortex can lead to outbreaks of bitterly cold air extending beyond the polar regions. The Earth's axis is tilted relative to its orbit around the Sun. During winter in a particular hemisphere (Northern or Southern), that hemisphere is tilted away from the Sun. This leads to sunlight being spread over a larger surface area, reducing the intensity of solar radiation, and resulting in colder temperatures. In winter, the Sun is lower in the sky, and the duration of daylight is shorter. This means that the Sun's rays have to pass through a thicker layer of the Earth's atmosphere, scattering more sunlight and reducing the amount of solar energy reaching the surface. Although the Earth's orbit is slightly elliptical, the distance from the Sun does not contribute significantly to the seasons. However, when the Earth is closer to the Sun during its orbit (perihelion), it is summer in the hemisphere experiencing it. When farther away (aphelion), it is winter, but this effect is relatively small compared to axial tilt. Oceans have a high thermal inertia, meaning they take longer to heat up or cool down compared to land. In winter, the oceans release stored heat, moderating temperatures along coastal areas. However, this can also lead to the inland areas experiencing more extreme cold.The presence of mountain ranges can influence winter weather. Windward sides of mountains often experience more precipitation, which may fall as snow at higher elevations. Leeward sides, in contrast, can be in rain shadows, experiencing drier and colder conditions. The Arctic Oscillation and the Polar Vortex are atmospheric circulation patterns that can influence winter weather. When these patterns are in specific phases, they can lead to the intrusion of cold air masses from the Arctic into lower latitudes, causing colder temperatures. Snow covered surfaces have a high albeit, reflecting a significant portion of sunlight back into space. This reflects solar radiation away, preventing the ground from absorbing heat. As snow accumulates, it contributes to the maintenance of colder temperatures. Areas at higher latitudes, closer to the poles, receive less direct sunlight throughout the year. In winter, these regions experience prolonged darkness, resulting in colder temperatures. large scale atmospheric circulation patterns, such as the jet stream, can influence the movement of air masses and the distribution of temperatures. Changes in these patterns can lead to the transport of cold air from higher latitudes to lower latitudes.