Newfoundland and Labrador

California

Kansas

Nebraska

Oklahoma

Oregon

Texas

Québec

None

<p>A map of North America showing typical surface weather patterns. Dark lines indicate troughs shown in western region of Oregon, Newfoundland and Labrador, California, Texas, Oklahoma, Kansas, and north of Cuba in North Atlantic Ocean.</p>

<p>An elongated area of relatively low atmospheric pressure, often associated with fronts</p>

Trough

North America

NOAA

Anthropogenic Biomes

Areas at Risk of Soil Degradation

Average Annual Precipitation

Biomes

Climate Zones

Global Mean Temperature, January

Global Mean Temperature, July

Global Surface Warming: Worst-Case Projections (NASA)

Insolation

Land Cover

Major Soil Orders

Prevailing Agricultural Practices

World Elevations