What regions have low or high annual precipitation?
http://www.climate-charts.com/images/world-rainfall-map.png
http://earth.rice.edu/mtpe/hydro/hydrosphere/hot/freshwater/rainfall.html
To determine regions with low or high annual precipitation, you can refer to historical weather data or climate maps. Here's how you can find this information:
1. Historical Weather Data: There are various websites that provide historical weather data for different regions. One popular database is the National Climatic Data Center (NCDC) operated by the National Oceanic and Atmospheric Administration (NOAA) in the United States. You can search for specific locations or regions in their database and access past precipitation records to get an idea of the average annual precipitation.
2. Climate Maps: Climate maps display different climate zones and provide information about average precipitation levels in different regions. Organizations like the Köppen-Geiger Climate Classification System categorize climates based on vegetation, temperature, and precipitation patterns. The maps will typically have different colors or shading to represent low, moderate, and high precipitation areas.
Some online sources, such as the World Bank or United Nations Environment Programme (UNEP), provide interactive climate maps or tools that allow you to explore global precipitation patterns.
Keep in mind that precipitation levels can vary significantly within a region, so it's essential to consider local variations and microclimates when analyzing the data.