Which statement distinguishes weather forecasting from climate analysis?

• A. Weather forecasts focus on long-term climate trends.
• B. Weather forecasts rely on no data inputs.
• C. Climate analysis looks at short-term variability.
• D. Weather forecasts focus on short-term predictions using models and data; climate analysis examines long-term patterns and variability.

Answer: (D)

Weather forecasting and climate analysis differ mainly in time scale and purpose. Weather forecasts aim to predict short-term conditions using current observations and models to forecast days ahead, with forecast skill decreasing as lead time grows. Climate analysis, on the other hand, looks at long-term patterns and variability across decades, using historical records and proxies to describe trends and fluctuations. The statement that weather forecasts focus on short-term predictions using models and data while climate analysis examines long-term patterns and variability captures this crucial distinction. The other options misstate either the time frame or the data basis, so they don’t fit as well.