The phrase
"warm anomalies" refers to areas or occurrences that are warmer than what is considered normal or expected.
Full definition
In fact, large
warm anomalies in one place are always accompanied by large cold anomalies in other places.
In the past 30 years, however, that pattern reversed,
with warm anomalies increasing at a faster rate than cold anomalies.
Warm anomalies increased into spring (Fig. 1) resulting in numerous regional records for average daily minimum and maximum.
Global temperature thus continues at a high level that is sufficient to cause a substantial increase in the frequency of
extreme warm anomalies.
Perhaps even more impressive, nine of the 10 largest
monthly warm anomalies in the 125 - year JMA analysis record have occurred from May 2015 through March 2016.
Only looking at the Niño 3.4 index hides the fact that this event is more typical of La Niña Modoki, where cool SST anomalies in the central equatorial Pacific are flanked
by warm anomalies to the east and west.
The large
Arctic warm anomaly of 2007 is consistent with observations of record low geographic extent of Arctic sea ice in September 2007.
In addition, ENSO variability was skewed toward cold events along coastal Peru 6.7 - 7.5 ka owing to a shift of
warm anomalies toward the Central Pacific.
The 20 - to 30 -
degree warmer anomalies in the Arctic have been matched by 20 - to 30 - degree colder anomalies in Siberia.
Any way you look it, from the Climate Prediction Center Outlook through May, to the
ongoing warm anomalies in land and sea surface temperatures, much of the United States is likely to find above average temperatures in the coming months.
And that trend of
warm anomalies over the past year or so has become disconcerting, not simply due to the record - tying strong El Niño, but also the degree of higher northern latitude warming.
November 2017 is the
37th warmest anomaly in the full UAH TLT all - month record (45th warmest in RSS).
For global - mean temperature, no month prior to 1979 in the HadCRUT4 dataset has an anomaly as large as 0.1 °C relative to 1981 - 2010, whereas
record warm anomalies since 1979 range from 0.4 °C for May to 0.8 °C for December.
Anomalous temperature (red solid circles) lies well within the envelope of
other warm anomalies during the preceding three decades.
It is not known if the BoM's testing paramaters which establish a 1972
metrication warming anomaly around.1 C in Australia are applicable to New Zealand's temperature records, which show similar whole degree rounding patterns caused by weather station observers not recording fractions in the Fahrenheit era and software communication errors in the Celsius era.
NASA's global temperatures data for March 2017 shows the month was 1.37 °C degrees above a 1880 - 1909 baseline, making it the
fourth warmest anomaly of any month in recorded history.
By October (vi), thermal stress subsided in the Gulf of Mexico; however,
warm anomalies intensified in the Windward Islands and expanded into the southern Caribbean.
In July (iii), the western
Caribbean warm anomalies persisted from Panama to Nicaragua and the extreme western Atlantic east of the Lesser Antilles began to warm.
Nick Stokes (15:57:48): see rbateman (16:09:03): Truly is amazing, if the «average temperature of all the GHCN stations being used in each year», plotted by years shows a decline, and the claimed, by the faithful,
higher warm anomaly (high altitiude) stations were dropped, where is the warming?
This was associated with
huge warm anomalies in the eastern Canadian Arctic and Greenland — up to 20 degrees Celcius, about 35 degrees Fahrenheit.
Although large areas were colder than usual, still larger areas were warmer, for a
slight warm anomaly — .37 C.
Over the last month or so warm sea - surface temperature [SST] and upper - ocean heat content anomalies have increased in the near - equatorial central Pacific, while the SST cool tongue in the near - equatorial far - eastern Pacific has weakened, with
warm anomalies now evident there.
In part 2 we'll see that seasonal
extreme warm anomalies in 2009 - 2011 are well above the 1951 - 1980 base period typically used in GISTEMP analyses - indicative of global warming's role in heatwaves.
November 2017 is = 96th
warmest anomaly on the full all - month HadCRUT4 record (= 25th in GISS, = 31st in BEST, 37th UAH TLT, 45th RSS TLT, = 52nd in NOAA).
The fact that the occurrence of warm and moderately dry years approaches that of moderately dry years in the last decades of the Historical experiment (Fig. 3 B and C) and that 91 % of negative precipitation years in 1995 — 2014 co-occurred
with warm anomalies (Fig. 1B) suggests possible emergence of a regime in which nearly all dry years co-occur with warm conditions.