February 2016 Global Surface Temperature Anomalies May or May Not Have Been Highest on Record, According to the UKMO

Guest Post by Bob Tisdale UPDATE:  I used the phrase “may or may not” with respect to February 2016 being the warmest on record in the title and text of…

January 2016 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

Guest Post by Bob Tisdale UPDATE: All graphs with UAH lower troposphere temperature data have been updated from beta version 6.4 to 6.5. Thanks, Nick Stokes. This means Figure 4…

New Paper Confirms the Hiatus Is Not Occurring at the Poles, Undermining the Efforts of Cowtan and Way

Guest Post by Bob Tisdale Pierre Gosselin of NoTrickZone reports on a paper that confirms the slowdown in global surface warming has not been occurring at the poles. See Pierre’s…

September 2014 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

Guest Post by Bob Tisdale This post provides an update of the data for the three primary suppliers of global land+ocean surface temperature data—GISS through September 2014 and HADCRUT4 and…

August 2014 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

Guest Post by Bob Tisdale This post provides an update of the data for the three primary suppliers of global land+ocean surface temperature data—GISS through August 2014 and HADCRUT4 and…

July 2014 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

This post provides an update of the data for the three primary suppliers of global land+ocean surface temperature data—GISS through July 2014 and HADCRUT4 and NCDC through June 2014—and of…

June 2014 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

Sorry this update is late. I got sidetracked with the post about Risbey et al. (2014), and the post about the new climate model, now with knobs. This post provides…

May 2014 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

This post updates the data for the three primary suppliers of global land+ocean surface temperature data—GISS through May 2014 and HADCRUT4 and NCDC through April 2014—and of the two suppliers…

April 2014 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

Initial Notes: This is the first monthly update to include lower troposphere temperature (TLT) anomaly data. To make this post as timely as possible, only GISS LOTI and the two…

On the Differences and Similarities between Global Surface Temperature and Lower Troposphere Temperature Anomaly Datasets

UPDATE: See the correction at the end of the post, which pertained to the discussion of the trend maps in Figures 13 and 14. I’ve crossed out the paragraph between…

March 2014 Global Surface (Land+Ocean) Temperature Anomaly Update

INITIAL QUESTION Once upon a time, the NCDC published its monthly global land+ocean surface temperature anomaly data around the 15th of the month. They have recently relaxed the dates of…

GISS LOTI & NCDC Global Temperature Data Drop in February 2014

This post will serve as February 2014 Global Surface (Land+Ocean) Temperature Anomaly Update First GISS: Global surface temperatures, as represented by the GISS Land-Ocean Temperature Index (LOTI) data, dropped about…

Cowtan and Way (2013) Adjustments Exaggerate Climate Model Failings at the Poles and Do Little to Explain the Hiatus

We’ve already discussed Cowtan and Way’s infilling of HADCRUT4 data in the post On Cowtan and Way (2013) “Coverage bias in the HadCRUT4 temperature series and its impact on recent…

January 2014 Global Surface (Land+Ocean) Temperature Anomaly Update

Initial Notes: This post contains graphs of running trends in global surface temperature anomalies for periods of 13+ and 16+ years using GISS global (land+ocean) surface temperature data. They indicate…

Why Aren’t Global Surface Temperature Data Produced in Absolute Form?

The title question often appears during discussions of global surface temperatures. That is, GISS, Hadley Centre and NCDC only present their global land+ocean surface temperatures products as anomalies. The questions…

HADCRUT4 for 2013: Almost a DNF in Top Ten Warmest

More Year-End Results The UKMO-Hadley Centre presented its annual HADCRUT4 data a few days ago. The HADCRUT4 annual global land+ocean surface temperature anomalies for 2013 ranked 8th. That’s not much…

Also-Rans: NCDC and GISS Global Surface Temperatures Finish 4th and 7th for 2013

Not a win, place or show between them. In other words, global surface temperatures are still stalled in the post-1997/98-El-Niño era. They are patiently waiting for another strong El Niño…

November 2013 Global Surface (Land+Ocean) Temperature Anomaly Update

In addition to their monthly global land-ocean temperature index (LOTI) data, GISS also lists quarterly and two annual (December to November and January to December) data. (Source here.) The annual…

October 2013 Global Surface (Land+Ocean) Temperature Anomaly Update

The following graph is of annual global surface temperature anomalies, including year-to-date 2013 values. The base years for anomalies are 1981-2010. The GISS and NCDC data run through October 2013,…

September 2013 Global Surface (Land+Ocean) Temperature Anomaly Update

Sorry this is so late. The NCDC and GISS updates were delayed by the government shutdown. Because it is so late, it includes the September 2013 HADCRUT4 data from the…

July 2013 Global Surface (Land+Ocean) Temperature Anomaly Update

My apologies for the delay. I was waiting for the NCDC to update their data webpage here. As of this morning, the NCDC has not updated it, so I used…

Part 2 – Comments on the UKMO Report “The Recent Pause in Global Warming”

This is part 2 of the 3-part series. In it, we’ll discuss the recently released UK Met Office paper The recent pause in global warming (2): What are the potential…

Part 1 – Comments on the UKMO Report about “The Recent Pause in Global Warming”

INTRODUCTION I’ve received a number of emails and requests to comment on the recently released 3-part report from the UK Met Office titled “The Recent Pause in Global Warming”. See…

June 2013 Global Surface (Land+Ocean) Temperature Anomaly Update

Initial Notes: This post contains graphs of running trends in global surface temperature anomalies for periods of 12+ and 16 years using HADCRUT4 data. They indicate that we have not…