The assertion that an increase in mean temperature leads to lower precipitation across the United States is true.

The assertion that an increase in mean temperature leads to lower precipitation across the United States is true.

• A. True
• B. False
• C. Not enough information
• D. It depends on context

Answer: (B)

The main idea here is that warming does not automatically mean less rainfall everywhere. Increasing mean temperature changes the atmosphere’s moisture-holding capacity, so warmer air can carry more water vapor. If moisture is available and weather systems bring it, rainfall can become more intense. In the United States, climate warming is expected to produce a mix of regional outcomes rather than a uniform drop in precipitation: some areas (like the Southwest) may become drier, while other regions may experience more heavy rainfall events or little change in total precipitation. Because precipitation is governed by atmospheric circulation, moisture supply, and regional weather patterns, you can’t assume a blanket decrease across the entire country.

The main idea here is that warming does not automatically mean less rainfall everywhere. Increasing mean temperature changes the atmosphere’s moisture-holding capacity, so warmer air can carry more water vapor. If moisture is available and weather systems bring it, rainfall can become more intense. In the United States, climate warming is expected to produce a mix of regional outcomes rather than a uniform drop in precipitation: some areas (like the Southwest) may become drier, while other regions may experience more heavy rainfall events or little change in total precipitation. Because precipitation is governed by atmospheric circulation, moisture supply, and regional weather patterns, you can’t assume a blanket decrease across the entire country.