Claim: Yet a study published just this week, by the Bjerknes Centre for Climate Research in Bergen, Norway, found that the natural climate system can change abruptly, without the need for any external forces.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The Bjerknes Centre for Climate Research is a climate research centre in Bergen, Norway.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The centres key areas of research is natural variability in the Earth system and man-made climate change.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Asgeir Sorteberg in the Special Report on managing the risks of extreme events and disasters to advance climate change adaption (SREX).

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Analysis of the layering and chemical composition of the cores has provided a revolutionary new record of climate change in the Northern Hemisphere going back about 100,000 years and illustrated that the world's weather and temperature have often shifted rapidly from one seemingly stable state to another, with worldwide consequences.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: He has provided evidence that large, abrupt global climate changes have occurred repeatedly in the Earth’s history and has contributed to our understanding of the driving mechanisms of these changes.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: An abrupt climate change occurs when the climate system is forced to transition to a new climate state at a rate that is determined by the climate system energy-balance, and which is more rapid than the rate of change of the external forcing.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: A 2013 report from the U.S. National Research Council called for attention to the abrupt impacts of climate change, stating that even steady, gradual change in the physical climate system can have abrupt impacts elsewhere, such as in human infrastructure and ecosystems, if critical thresholds are crossed.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Natural changes in the climate system result in internal "climate variability".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Abrupt climate change, tipping points in the climate system: Climate change could result in global, large-scale changes.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Some models of modern climate exhibit Arctic amplification without changes in snow and ice cover.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: According to the Committee on Abrupt Climate Change of the National Research Council:

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Changes occuring around the last ice age (in technical terms, the last glacial) show that the circulation is the North Atlantic can change suddenly and substantially, leading to global climate changes, even though the total amount of energy coming into the climate system didn't change much.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Climate change can also result from "external forcing", when events outside of the climate system's components nonetheless produce changes within the system.