Not exact matches
My amateur spreadsheet tracking and projecting the monthly NASA GISS values suggests that while 2018 and 2019 are likely to be cooler than 2017, they may also be the last years on Earth with
global average
land and ocean
surface temperature anomaly below 1C above pre-industrial average (using 1850 - 1900 proxy).
«The average
global temperature anomaly for combined
land and ocean
surfaces for July (based on preliminary data) was 1.1 degrees F (0.6 degrees C) above the 1880 - 2004 long - term mean.
The annual
anomaly of the
global average
surface temperature in 2014 (i.e. the average of the near -
surface air
temperature over
land and the SST) was +0.27 °C above the 1981 - 2010 average (+0.63 °C above the 20th century average), and was the warmest since 1891.
You are spending a lot of time rationalizing WHY there was a «standstill» in
global warming (as measured by the «globally and annually averaged
land and sea
surface temperature anomaly»).
The metric used by IPCC in all its reports for past and projected future «
global warming» has been the «globally and annually averaged
land and sea
surface temperature anomaly» (as reported by HadCRUT3).
It is instructive to compare these numbers with those characteristic of a set of the years during 1979 — 2012 with no or only one major regional extreme event (in terms of
land surface temperature and
land precipitation
anomalies) in the NH midlatitudes, from late April / early May to late September / early October, as reported yearly since 1993 in the World Meteorological Organization statements on the status of the
global climate (see also ref.
The period of increased warming from 1987 to 1997 loosely coincided with the divergence of the
global average
temperature anomalies over
land, which are derived from observation station recordings, and the
global average
anomalies in sea
surface temperatures.
The increase in the
global average
temperature anomaly and the divergence of
land and sea
surface temperatures also coincided with two significant changes in
global average cloud cover.
However you slice it, lolwot, there is a current «pause» (or «standstill») in the warming of the «globally and annually averaged
land and sea
surface temperature anomaly» (used by IPCC to measure «
global warming»), despite unabated human GHG emissions and CO2 levels (Mauna Loa) reaching record levels.
Step 3 involves application of a spatial analysis technique (empirical orthogonal teleconnections, EOTs) to merge and smooth the ocean and
land surface temperature fields and provide these merged fields as
anomaly fields for ocean,
land and
global temperatures.
Figure 2.4 (Folland et al., 2001) shows simulations of
global land -
surface air
temperature anomalies in model runs forced with SST, with and without bias adjustments to the SST data before 1942.
Update: The September 2013 NCDC
global land plus sea
surface temperature anomaly is +0.64 deg C.
Introduction: The NOAA
Global (
Land and Ocean)
Surface Temperature Anomaly dataset is a product of the National Climatic Data Center (NCDC).
Global temperatures usually are described in terms of the
surface air
temperature anomaly, the deviation of the
temperature at each site from a mean of many years that is averaged over the whole world, both
land and oceans.
However, for changes over time, only
anomalies, as departures from a climatology, are used, most commonly based on the area - weighted
global average of the sea
surface temperature anomaly and
land surface air
temperature anomaly.
The
anomaly map on the left is a product of a merged
land surface temperature (
Global Historical Climatology Network, GHCN) and sea
surface temperature (ERSST.v4)
anomaly analysis as described in Huang et al. (2016).
Figure 6 shows the
global land surface air
temperature plus sea
surface temperature anomalies (average of GISS LOTI, HADCRUT4 and NCDC datasets, like The Escalator) before, during and after the 1997/98 El Niño.
«This paper is a game changer, in my view, with respect to the use of the
land surface temperature anomalies as part of the diagnosis of
global warming,» he blogged.