IB ESS HL 6.2.4 Enhanced greenhouse effect Question Bank
Practise IB ESS SL/HL 006.002.004 by applying enhanced greenhouse effect concepts to exam-style environmental systems questions.
- Syllabus
- First assessment 2026
- Course
- ESS HL
- Level
- HL
Practise IB ESS SL/HL 006.002.004 by applying enhanced greenhouse effect concepts to exam-style environmental systems questions.

Figure:Seasonal changes in Arctic sea ice

Figure:Arctic sea-ice extent

Table:Arctic sea-ice cover from 1979 to 2012
the seasonal Arctic sea-ice diagram shown above: Changes in Arctic sea ice in a typical year.
org/arcticseaicenews/charctic-interactive-sea-ice-graph/. Accessed November 18, 2015.]
Identify one factor that may be causing long-term changes in sea ice cover.
climate change/global warming;
Milankovitch cycles; solar cycle/sunspot activity; shifting ocean currents;
El Niño;