The temperature of earth's atmosphere increases with height in

Options

A. Troposphere
B. Ionosphere
C. Mesosphere
D. Stratosphere.

Answer

To determine in which layer of the Earth's atmosphere the temperature increases with height, let's analyze the different layers of the atmosphere step by step.

### Step-by-Step Solution:

1. **Understanding Atmospheric Layers**:
The Earth's atmosphere is divided into several layers, each characterized by different temperature gradients. The main layers include the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

2. **Temperature Behavior in the Troposphere**:
In the troposphere, which is the lowest layer of the atmosphere, the temperature generally decreases with height. This is because the troposphere is heated from below by the Earth's surface.

3. **Temperature Behavior in the Stratosphere**:
In the stratosphere, which lies above the troposphere, the temperature actually increases with height. This increase is due to the presence of the ozone layer, which absorbs ultraviolet radiation from the sun, warming this layer.

4. **Temperature Behavior in the Mesosphere**:
The mesosphere, located above the stratosphere, is characterized by a decrease in temperature with height. This layer is colder than the stratosphere.

5. **Temperature Behavior in the Ionosphere**:
The ionosphere is not a distinct layer like the others but is part of the thermosphere. In this region, the temperature increases significantly with height due to the absorption of high-energy solar radiation.

6. **Conclusion**:
Based on the analysis, the temperature of the Earth's atmosphere increases with height primarily in the stratosphere and the ionosphere. However, the most commonly referenced layer for this phenomenon in basic atmospheric studies is the stratosphere.

### Final Answer:
The temperature of Earth's atmosphere increases with height in the **stratosphere**.