As a geophysicist with a focus on atmospheric science, I am well-versed in the structure and composition of Earth's atmosphere. The Earth's atmosphere is a complex system that is divided into several layers based on various criteria such as temperature, composition, and altitude. One of the critical layers in this system is where the ozone layer is located.

The ozone layer is situated within the stratosphere, which is the second major layer of Earth's atmosphere above the troposphere. The stratosphere extends from approximately 10 to 50 kilometers (6 to 31 miles) above the Earth's surface. This layer is characterized by a temperature increase with altitude, which is due to the absorption of ultraviolet (UV) radiation by the ozone molecules present in this layer. The ozone layer specifically is found in the lower portion of the stratosphere, roughly between 15 and 35 kilometers (9 to 22 miles) above the Earth's surface.

The ozone layer plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet radiation. Without this protective shield, the increased levels of UV radiation reaching the Earth's surface would have severe consequences for human health, ecosystems, and the climate. It is also worth noting that the ozone layer is not a distinct, separate layer but rather a concentration of ozone within the stratosphere.

The troposphere, which is the first layer of the atmosphere above the Earth's surface, is where weather occurs and contains 70 to 80 percent of the atmosphere's mass. It extends from the Earth's surface to an average height of about 8 to 15 kilometers (5 to 9 miles), depending on latitude and season. The temperature in the troposphere generally decreases with altitude, which is why it is the most turbulent and weather-active layer.

Many jet aircrafts fly in the stratosphere because it offers more stable atmospheric conditions compared to the troposphere. The absence of weather systems and the steadier air currents make it an ideal environment for long-distance flights. Additionally, flying at these altitudes allows aircraft to avoid the majority of weather-related turbulence and delays.

In conclusion, the ozone layer is an integral part of the stratosphere, where it serves as Earth's shield against harmful UV radiation. Understanding the structure and function of Earth's atmospheric layers is essential for appreciating the complex processes that support life on our planet.

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1) The troposphere is the first layer above the surface and contains 70 to 80 per cent of the Earth's atmosphere. Weather occurs in this layer. 2) Many jet aircrafts fly in the stratosphere because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun.read more >>