Claim: “Dr Browman, a marine scientist for 35 years, said he was not saying that ocean acidification posed no threat, but that he believed that “a higher level of academic scepticism” should be applied to the topic.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Ocean acidification poses a severe threat to the earth's natural process of regulating atmospheric C02 levels, causing a decrease in water's ability to dissolve oxygen and created oxygen-vacant bodies of water called "dead zones."

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: It's yet another reason to be very seriously concerned about the amount of carbon dioxide that is in the atmosphere now and the additional amount we continue to put out."

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: In a synthesis report published in Science in 2015, 22 leading marine scientists stated that CO 2 from burning fossil fuels is changing the oceans' chemistry more rapidly than at any time since the Great Dying, Earth's most severe known extinction event, emphasizing that the 2 °C maximum temperature increase agreed upon by governments reflects too small a cut in emissions to prevent "dramatic impacts" on the world's oceans, with lead author Jean-Pierre Gattuso remarking that "The ocean has been minimally considered at previous climate negotiations.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Ocean acidification is an effect of rising concentrations of [[Carbon dioxide|CO]] in the atmosphere, and is not a direct consequence of global warming.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "Ocean Growing More Acidic Faster Than Once Thought; Increasing Acidity Threatens Sea Life".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: • Ocean acidification is projected to continue (very high confidence).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: He has also written about ocean acidification from a similarly skeptical point of view, arguing that "Even if CO2 increases to 560 ppm by 2050, as the IPCC predict, this would only result in a 0.2 unit reduction of pH.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: "Marine calcifiers exhibit mixed responses to CO 2-induced ocean acidification".

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO 2) from the atmosphere.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: However, Greg Holland from the National Center for Atmospheric Research, who reviewed the study, noted: “There is no doubt that the sea level rise, within the IPCC, is a very conservative number, so the truth lies somewhere between IPCC and Jim.” In addition, one 2017 study's scenario, assuming high fossil fuel use for combustion and strong economic growth during this century, projects sea level rise of up to 132 cm (4.3 ft) on average — and an extreme scenario with as much as 189 cm (6.2 ft), by 2100.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: In 1957, better understanding of ocean chemistry led Roger Revelle to a realization that the ocean surface layer had limited ability to absorb carbon dioxide, also predicting the rise in levels of and later being proven by Charles David Keeling.