Abstract: In this paper, a measurement approach for standing tree volume based on laser scanner is presented, which uses geometry analysis to process three-Dimensional point cloud data and makes a ...

Weather watchers in Northern Ireland have been treated to striking displays of noctilucent clouds.

Mackerel skies: a sky filled with rows of cirrocumulus or altocumulus clouds that resemble the scales of a mackerel fish.

However, since these clouds are a bit higher up in the mid-level, the sun may be roughly visible. Altocumulus: These cumulus clouds are grouped closer together than regular cumulus clouds. They ...

Scientists are venturing to the Southern Ocean to study clouds and the world's cleanest air to better understand climate change and the impact of human activity on the Earth's atmosphere.