A climate scientist is analyzing historical temperature data from Greenland ice cores. The data reveals several abrupt shifts in temperature over the past 10,000 years, some occurring within decades. These shifts are often correlated with changes in atmospheric dust levels, ocean currents, and volcanic activity recorded in the same cores. However, the data also shows that not every major volcanic eruption or ocean current alteration immediately led to an abrupt temperature shift. Which of the following conclusions is most strongly supported by this information?
- AAbrupt temperature shifts are solely caused by volcanic activity.
- BOcean currents are the primary driver of all past climate changes in Greenland.
- CThe Earth's climate system is highly sensitive and prone to rapid, complex changes from multiple interacting factors.
- DPast climate changes were always gradual and predictable over centuries.
Show answer & explanationAnswer & explanation
Correct answer: C. The Earth's climate system is highly sensitive and prone to rapid, complex changes from multiple interacting factors.
The text highlights 'abrupt shifts' occurring 'within decades,' indicating sensitivity and rapid change. The correlation with 'atmospheric dust levels, ocean currents, and volcanic activity' points to 'multiple interacting factors.' The caveat that 'not every major volcanic eruption or ocean current alteration immediately led to an abrupt temperature shift' further emphasizes the 'complex' nature of these interactions rather than a single cause. This all points to the climate system being 'highly sensitive and prone to rapid, complex changes from multiple interacting factors.'
Why the other options are wrong
- A. This is contradicted by the mention of 'ocean currents' and 'atmospheric dust levels' as correlated factors, and the fact that 'not every major volcanic eruption' led to a shift.
- B. The data mentions multiple factors, not just ocean currents as the 'primary driver,' and notes that not every ocean current alteration led to a shift.
- D. This is directly contradicted by the phrase 'abrupt shifts in temperature... some occurring within decades,' which indicates rapid, not gradual, change.
Complex Inference & Synthesis
Complex inference and synthesis involve integrating multiple, sometimes nuanced or seemingly contradictory, pieces of information to draw a comprehensive conclusion about a system or phenomenon. It often requires understanding interactions and conditional relationships.
- Identify all contributing factors and their observed effects.
- Note any conditions or exceptions to observed correlations.
- Formulate a conclusion that accounts for all nuances and interactions.
Memory trick: Many Movers Make Major Messes, Marking Multi-faceted Models.