The main result of this study, that the influence of urban areas on the global
land temperature data set is very small, corroborates the consensus view among climate scientists, including, for example, the recent paper by Souleymane Fall and others.
Not exact matches
The researchers analyzed
temperature records for the years 1881 to 2013 from HadCRUT4, a widely used
data set for
land and sea locations compiled by the University of East Anglia and the U.K. Met Office.
A number of recent studies indicate that effects of urbanisation and
land use change on the
land - based
temperature record are negligible (0.006 ºC per decade) as far as hemispheric - and continental - scale averages are concerned because the very real but local effects are avoided or accounted for in the
data sets used.
Global positioning satellites (GPS); remote sensing for water, minerals, and crop and
land management; weather satellites, arms treaty verifications; high -
temperature, light - weight materials; revolutionary medical procedures and equipment; pagers, beepers, and television and internet to remote areas of the world; geographic information systems (GIS) and algorithms used to handle huge, complex
data sets; physiologic monitoring and miniaturization; atmospheric and ecological monitoring; and insight into our planet's geological history and future — the list goes on and on.
The «hump» during WW2 (which includes the subsequent cooling) is only in the SST
data and not the
land temperatures, so for that I suspect there is still some uncorrected issues in the SST
data sets.
There are also plenty of examples where models have correctly suggested that different
data sets were inconsistent (satellite vs. surface in the 1990s, tropical ice age ocean
temperatures vs.
land temperatures in the 1980s etc.) which were resolved in favor of the models.
The BEST team has produced the best
land surface
temperature data set that we currently have.
From what I see from the Global Historical Climatology Network (GHCN) of
land temperatures and the Comprehensive Ocean - Atmosphere
Data Set (COADS) of SST data, temperatures there were higher around the 1930's than now, and there is not much long term warming trend, except for the past few ye
Data Set (COADS) of SST
data, temperatures there were higher around the 1930's than now, and there is not much long term warming trend, except for the past few ye
data,
temperatures there were higher around the 1930's than now, and there is not much long term warming trend, except for the past few years.
Was the release of the
land and ocean
temperature data sets, which were documented in papers previously published, delayed to follow Karl's June press release?
Other SAT
data sets such as the Climatic Research Unit
Temperature, version 4, (CRUTEM4; Osborn and Jones 2014), and the Merged
Land — Ocean Surface
Temperature analysis (MLOST), version 3.5, (Vose et al. 2012) give similar results (not shown).
The original Escalator was based on the Berkeley Earth Surface
Temperature (BEST) data, which incorporates more temperature station data than any other data set, but is limited to land - only data; additionally the record terminates in
Temperature (BEST)
data, which incorporates more
temperature station data than any other data set, but is limited to land - only data; additionally the record terminates in
temperature station
data than any other
data set, but is limited to
land - only
data; additionally the record terminates in early 2010.
Other major global
land temperature reconstructions by NASA, NOAA, and the Hadley Center largely rely on the same
set of monthly
data from about 7,000 stations that comprise the Global Historical Climatological Network (GHCN - M).
All of the global surface
temperature data sets employ NOAA's GHCN
land surface
temperatures.
Whether this increase in instantaneous heat production shows up in near surface
land based
temperature measuring
data sets or not, I don't know.
I want to point out that all of the surface
data sets over
land suffer from i) a systematic warm bias associated with using minimum
temperatures in the construction of trends and I) in blending non-spatially representative sites with good sites.
Earth's global average surface
temperature has risen as shown in this plot of combined
land and ocean measurements from 1850 to 2012, derived from three independent analyses of the available
data sets.
The university said on Saturday that 95 % of the CRU climate
data set concerning
land surface
temperatures has been made available to the public for «several years» and that all
data will be... Read more
Other
data sets such as ocean heat content, sea ice extent, whatever, are not sufficiently mature or long - range... Further, the surface
temperature is most relevant to climate change impacts, since humans and
land ecosystems live on the surface.»
The authors use a sea surface
temperature data set that has been corrected for biases in sea surface
data that arise due to the difference in measurements from ships and buoys, and the authors incorporate a much larger amount of
data from
land - based observations.
At the end of the month, East Anglia's Phil Jones would send the
land data to Hadley, which would take a critical look and combine that with their sea - surface
data, and then the two teams would release what would be known as the HadCRU (for East Anglia's Climatic Research Unit)
temperature data set.
Berkeley Earth combines our
land data with a modified version of the HadSST ocean
temperature data set.