Claim: If Houlton’s finding about these vast, previously unknown nitrogen stores holds true, then it would have an enormous impact on global warming predictions.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Climate models predict much greater warming in the Arctic than the global average, resulting in significant international attention to the region.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: In a projection designed to simulate a future where no efforts are made to reduce global emissions, the likely rise in global average temperature was predicted to be 5.5 °C by 2100.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: By the 1970s, scientists were becoming increasingly aware that estimates of global temperatures showed cooling since 1945, as well as the possibility of large scale warming due to emissions of greenhouse gases.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: When the model included estimated changes in solar intensity, it gave a reasonable match to temperatures over the previous thousand years and its prediction was that "CO 2 warming dominates the surface temperature patterns soon after 1980."

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: A consensus was emerging that parties to an international agreement would introduce measures to constrain the combustion of hydrocarbons in an effort to limit global temperature rise to the nominal 2 °C that scientists predicted would limit environmental harm to tolerable levels.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Elevated levels of atmospheric compounds of nitrogen can increase nitrogen availability.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: A vast release of methane might cause significant global warming since methane is a very powerful greenhouse gas.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Nitrogen fertilizer can be converted by soil bacteria to nitrous oxide, a greenhouse gas.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Greenhouse gases trap heat radiating from the Earth to space.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The thawing of permafrost has implications for the global climate.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Additionally, the global warming induced thawing of the permafrost, which stores about two times the amount of the carbon currently released in the atmosphere, releases the potent greenhouse gas, methane, in a positive feedback cycle that is feared to lead to a tipping point called runaway climate change.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Release of methane and carbon dioxide stored in permafrost could cause abrupt and severe global warming, as they are potent greenhouse gases.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Researchers that studied effects of close by supernovae on earth and uncovered suggestive correlating evidence during the Younger Dryas, including depletion of the ozone layer, increased UV exposure, nitrogen changes on the Earth's surface and troposphere, evidence of global cooling, changes in C and Be in ice cores, a thin layer (about 30 cm) of “black mats”, and many extinctions that may have been caused by the explosion of the Vela supernova.