Claim: Temperatures in 1999 were nearly three-tenths of a degree lower than in 1998, and a similar change should occur this time around, though it might not fit so neatly into a calendar year.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: This means that a temperature difference of one degree Celsius and that of one kelvin are exactly the same.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: These isotope changes occurred due to the release of carbon from the ocean into the atmosphere that led to a temperature increase of 4-8 °C (7-14 °F) at the surface of the ocean.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Winter is often defined by meteorologists to be the three calendar months with the lowest average temperatures.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The Gregorian calendar attempts to cause the northward equinox to fall on or shortly before March 21 and hence it follows the northward equinox year, or tropical year.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: Because 97 out of 400 years are leap years, the mean length of the Gregorian calendar year is 365.2425 days; with a relative error below one ppm (8·10−7) relative to the current length of the mean tropical year (365.24219 days) and even closer to the current March equinox year of 365.242374 days that it aims to match.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: This varies from year to year, and temperatures fluctuate enough that such a rise in late-January temperature would be unremarkable ; what is remarkable (and unexplained) is the tendency for such rises to occur more commonly in late January than in mid-January or early February, which sinusoidal estimates have to be slightly warmer.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: During the last 20-30 years, world temperature has fallen, irregularly at first but more sharply over the last decade.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The anomalously high global temperature in 1998 due to El Niño resulted in a brief drop in subsequent years.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: During this period, a sharp drop in global temperatures took place.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: The warming has not been globally uniform.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: To compare to the trend from the surface temperature record (+0.1610.033 °C/decade from 1979 to 2012 according to NASA GISS) it is most appropriate to derive trends for the part of the atmosphere nearest the surface, i.e., the lower troposphere.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: A lower air temperature of −94.7 °C (−138.5 °F) was recorded in 2010 by satellite—however, it may be influenced by ground temperatures and was not recorded at a height of 7 feet (2 m) above the surface as required for the official air temperature records.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Trends in global temperatures since January 1979 (the beginning of the satellite temperature record), measured in degrees Celsius per decade, at as October 31, 2019: