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Berkeley land ocean temperature
References
official web page http://www.berkeleyearth.org
Climate Explorer URLclimexp.knmi.nl/getindices.cgi?WMO=BerkeleyData/t2m_land_ocean_best&STATION=Berkeley_land_ocean_temperature
Climate Explorer filenameBerkeleyData/t2m_land_ocean_best.dat
Variable
nameT2m_anom
unitsK
long_nameglobal mean temperature anomalies relative to 1951-1980
Ascii global metadata
description Land temperature from Berkeley Dataset, , ocean temperature reinterpolated from HadSST, temperature over sea ice extrapolated from land., T2m anom [K] global mean temperature anomalies relative to 1951-1980,
institution Berkeley Earth Surface Temperature Project
source_url berkeleyearth.org/data/
history retrieved Thu 14 Jan 2021 07:14:03 PM MET
comment This file contains a detailed summary of the changes in Earth's global averagesurface temperature estimated by combining the Berkeley Earth land-surfacetemperature field with a reinterpolated version of the HadSST ocean temperature field. Two versions of this average are reported. These differ in how they treat locations with sea ice. In the first version, temperature anomalies in the presence of sea ice are extrapolated from land-surface air temperature anomalies. In the second version, temperature anomalies in the presence of sea ice areextrapolated from sea-surface water temperature anomalies (usually collected from open water areas on the periphery of the sea ice). For most of the ocean, sea-surface temperatures are similar to near-surface air temperatures; however, air temperatures above sea ice can differ substantially from the water below the sea ice. The air temperature version of this average shows larger changes in the recent period, in part this is because water temperature changes are limited by the freezing point of ocean water. We believe that the use of airtemperatures above sea ice provides a more natural means of describing changes in Earth's surface temperature. The percent coverage of sea ice was taken from the HadISST dataset and varies by month and location. In the typical month, between 3.5% and 5.5% of the Earth's surface is covered with sea ice. Prior to 1900, the ice field merely repeats a seasonal climatology and is not directly constrained by observations.For more information on the processing and use of HadISST and HadSST refer to the description file for the combined gridded data product. Temperatures are in Celsius and reported as anomalies relative to the Jan 1951-Dec 1980 average. Uncertainties represent the 95% confidence interval for statistical and spatial undersampling effects as well as ocean biases.The land analysis was run on 06-Jan-2021 15:35:34The ocean analysis was published on 05-Jan-2021 20:09:44The land component is based on 50564 time series with 20694236 monthly data pointsThe ocean component is based on 411558373 instantaneous water temperature observations%Estimated Jan 1951-Dec 1980 global mean temperature (C) Using air temperature above sea ice: 14.183 +/- 0.045 Using water temperature below sea ice: 14.714 +/- 0.045As Earth's land is not distributed symmetrically about the equator, thereexists a mean seasonality to the global average temperature. Using air temperature above sea ice:Estimated Jan 1951-Dec 1980 monthly absolute temperature: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 12.31 12.52 13.14 14.07 15.04 15.75 16.03 15.86 15.26 14.33 13.31 12.58+/- 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Using water temperature below sea ice:Estimated Jan 1951-Dec 1980 monthly absolute temperature: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 12.96 13.23 13.86 14.70 15.50 16.10 16.39 16.30 15.74 14.81 13.82 13.16+/- 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05