Assertion: global warming's effect | /r/Causes | shift
Facets:
value: in the thermohaline current
type: TEMPORAL
Source sentences:
text: Indirect effects due to melting polar and Greenland ice can upset the delicate salt balance in the North Atlantic Ocean, triggering a shift in the thermohaline current, which ironically may result in a local ice age in Northern Europe and parts of North America .