claim: “During the sunless winter, a heatwave raised concerns that the polar vortex may be eroding.
evidences.evidence_id: 2013–14 North American winter:28
evidences.article: 2013–14 North American winter
evidences.evidence: On December 1, 2013, the weakening of the polar vortex led to the beginning of an abnormally cold trend in the Eastern and Central United States.
evidences.votes: REFUTES SUPPORTS
evidences.evidence_id: Early 2014 North American cold wave:7
evidences.article: Early 2014 North American cold wave
evidences.evidence: The polar vortex Beginning on January 2, 2014, sudden stratospheric warming (SSW)[dubious – discuss] led to the breakdown of the semi-permanent feature across the Arctic known as the polar vortex.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Polar vortex:100
evidences.article: Polar vortex
evidences.evidence: The general assumption is that reduced snow cover and sea ice reflect less sunlight and therefore evaporation and transpiration increases, which in turn alters the pressure and temperature gradient of the polar vortex, causing it to weaken or collapse.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Stratosphere:51
evidences.article: Stratosphere
evidences.evidence: This breaking is caused due to a highly non-linear interaction between the vertically propagating planetary waves and the isolated high potential vorticity region known as the polar vortex.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS
evidences.evidence_id: Winter 1985 cold wave:0
evidences.article: Winter 1985 cold wave
evidences.evidence: The winter 1985 cold wave was a meteorological event, the result of the shifting of the polar vortex farther south than is normally seen.
evidences.votes: REFUTES SUPPORTS