Claim: Since the end of 2012, moreover, total polar ice extent has largely remained above the post-1979 average.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Arctic sea ice extent averaged for September 2012 was 3.61 million square kilometers (1.39 million square miles).

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: It continued to fall, bottoming out on 16 September 2012 at 3.41 million square kilometers (1.32 million square miles), or 760,000 square kilometers (293,000 square miles) below the previous low set on 18 September 2007 and 50% below the 1979–2000 average.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: From 1979–1996, the average per decade decline in entire ice coverage was a 2.2% decline in ice extent and a 3% decline in ice area.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: "Arctic sea ice volume now one-fifth its 1979 level".

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Since 1979, the ice volume has shrunk by 80% and in just the past decade the volume declined by 36% in the autumn and 9% in the winter.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Arctic sea ice extent ice hit an all-time low in September 2012, when the ice was determined to cover only 24% of the Arctic Ocean, offsetting the previous low of 29% in 2007.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The Intergovernmental Panel on Climate Change publication "Climate change 2013: The Physical Science Basis" stated that sea ice extent for the Northern Hemisphere showed a decrease of 3.8% ± 0.3% per decade from November 1978 to December 2012.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Atmospheric CO2 has risen over the last 150 years to current levels of over 390 ppmv, from the 180 – 300 ppmv of the prior 800 thousand years This rise in temperature has reduced the Arctic ice cap to 1,100,000 sq mi (2,800,000 km2),[citation needed] smaller than ever recorded.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: In contrast to East Antarctica and the Antarctic Peninsula, temperatures on West Antarctica have increased significantly with a trend between 0.08 °C (0.14 °F) per decade and 0.96 °C (1.7 °F) per decade between 1976 and 2012.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The global average and combined land and ocean surface temperature, show a warming of 0.85 [0.65 to 1.06] °C, in the period 1880 to 2012, based on multiple independently produced datasets.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Large-scale measurements of sea-ice have only been possible since the satellite era, but through looking at a number of different satellite estimates, it has been determined that September Arctic sea ice has decreased between 1973 and 2007 at a rate of about -10% +/- 0.3% per decade.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Estimates of how long the Arctic Ocean has had perennial ice cover vary.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Over 1979 to 2012 the trend for land was about 0.254 ± 0.050 °C per decade per CruTemp4 or 0.273 ± 0.047 per GHCN while the trend for sea surface temperatures is about 0.072 ± 0.024 °C per decade per HadISST to 0.124 ± 0.030 °C per decade per HadSST3.