Question

what types of temperature and climate changes have occurred in the northern hemisphere as a result of increasing the annual temperature of the globe by only 1 °c (1.8 °f)?
□ thirty-three percent of average summer temperatures are now colder than normal or extremely cold.
□ the climate curve has become taller and narrower, indicating higher average summer temperatures.
□ sixty-six percent of average summer temperatures are now in the hotter-than-normal range.
□ the climate curve has become broader, indicating more variability in climate or between regions.
□ approximately 22% of average summer temperatures are now in the extremely hot range.

Explanation:

To solve this, we analyze each option based on climate change knowledge (from Environmental Sciences, a subfield of Natural Science) when global temperature rises by 1°C:

• Option 1: With global warming, summer temps should be hotter, not colder. Eliminate.
• Option 2: A "taller and narrower" climate curve would imply less variability, but warming increases variability. Eliminate.
• Option 3: As global temp rises, more summer temps fall in hotter - than - normal range. This is consistent.
• Option 4: A broader climate curve indicates more variability (e.g., more extreme hot and cold, but mainly more hot extremes and regional differences), which is consistent with warming.
• Option 5: With 1°C warming, ~22% in extremely hot range is a known impact, consistent.

Answer:

C. Sixty - six percent of average summer temperatures are now in the hotter - than - normal range.
D. The climate curve has become broader, indicating more variability in climate or between regions.
E. Approximately 22% of average summer temperatures are now in the extremely hot range.