English: These images show temperature trends in two thick layers of the atmosphere as measured by a series of satellite-based instruments. The top image shows temperatures in the middle troposphere, centred around 5 kilometres above the surface. The lower image shows temperatures in the lower stratosphere, centred around 18 kilometres above the surface. Oranges and yellows dominate the troposphere image, indicating that the air nearest the Earth’s surface warmed during the period. The stratosphere image is dominated by blues and greens, indicating cooling.