Global Climate Report - May 2019
NOAAGlobalTemp Dataset Comparison: v4 vs v5

« Global Climate Report - May 2019


NOAAGlobalTemp Dataset Comparison: v4 vs v5


Overview

With the May 2019 global report and data release, the National Centers for Environmental Information transitioned to an improved version of NOAA's Global Temperature data set (NOAAGlobalTemp version 5), which includes the updated versions of its global land (GHCNm version 4.0.1) and ocean (ERSST version 5) data sets. Please note that anomalies and ranks reflect the historical record according to these updated versions. Historical months and years may differ from what was reported in previous years. Please visit our Commonly Asked Questions for additional information.

Comparisons

Global Historical Climatology Network-Monthly (GHCNm):

Released in October 2018, GHCNm v4 incorporated data from 19,000 additional reporting sites and capitalized on enhanced methods to analyze the volumes of information available in the NOAA NCEI archive.


NOAA Global Temperature Data set (NOAAGlobalTemp):

The ocean component of NOAAGlobalTemp is the Extended Reconstructive Sea Surface Temperature (ERSST). The new version of ERSST was released in July 2017. ERSSTv5 added more comprehensive ocean surface temperature data collected since 2015 and included new data from Argo floats that had never been used before in the dataset.


Warmest years on record:

NOAAGlobalTemp v4.0.1
Rank
1 = Warmest
Period of Record: 1880–2018
Month + Year Anomaly °C Anomaly °F
1 2016 0.95 1.71
2 2015 0.91 1.63
3 2017 0.85 1.53
4 2018 0.78 1.41
5 2014 0.74 1.34
6 2010 0.70 1.26
7 2013 0.67 1.20
8 2005 0.66 1.19
9 2009 0.64 1.14
10 1998 0.63 1.13
NOAAGlobalTemp v5.0.0
Rank
1 = Warmest
Period of Record: 1880–2018
Month + Year Anomaly °C Anomaly °F
1 2016 0.98 1.77
2 2015 0.92 1.66
3 2017 0.90 1.62
4 2018 0.82 1.47
5 2014 0.73 1.32
6 2010 0.72 1.29
7 2013 0.67 1.20
8 2005 0.66 1.19
9 1998 0.65 1.17
10 2009 0.64 1.15

Timeseries

Annual temperature departure from average timeseries: NGT v4 vs v5

References:

Menne, M. J., C. N. Williams, B.E. Gleason, J. J Rennie, and J. H. Lawrimore, 2018: The Global Historical Climatology Network Monthly Temperature Dataset, Version 4. J. Climate, in press. https://doi.org/10.1175/JCLI-D-18-0094.1.

Huang, B., Peter W. Thorne, et. al, 2017: Extended Reconstructed Sea Surface Temperature version 5 (ERSSTv5), Upgrades, validations, and intercomparisons. J. Climate, doi: 10.1175/JCLI-D-16-0836.1


Citing This Report

NOAA National Centers for Environmental Information, State of the Climate: Global Climate Report for May 2019, published online June 2019, retrieved on August 24, 2019 from https://www.ncdc.noaa.gov/sotc/global/201905/supplemental/page-3.

Metadata