Site: Bob Tisdale

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Bob Tisdale: Early 20th Century Warming – Polar Amplification, Model-Data & Model-Model Comparisons

In this post, we’re going to illustrate how poorly climate models used by the IPCC for their 5th Assessment Report simulate the polar amplification that data indicates took place during the early 20th Century warming period of 1916 to 1945. …

2019-02-07 02:00   Click to comment

Bob Tisdale: Global Mean Surface Temperature: Early 20th Century Warming Period – Models versus Models & Models versus Data

This is a long post: 3500+ words and 22 illustrations. Regardless, heretics of the church of human-induced global warming who frequent this blog should enjoy it. Additionally, I’ve uncovered something about the climate models stored in the CMIP5 archive that …

2019-01-31 23:45   Click to comment

Bob Tisdale: Deep Ocean Warming in Degrees C

In recent weeks and months, there’s been a run of papers—with typical mainstream media misinforming embellishments—about improved estimates of the warming of the oceans…and blog posts about them. One thing common to the papers is the use of the metric …

2019-01-24 02:00   Click to comment

Bob Tisdale: Mao et al 2019 Show an Upcoming 1-Deg C + Decline in Global Land Surface Temperatures by the Early 2100s

This is a quick introduction to the 2019 paper The “Ocean Stabilization Machine” May Represent a Primary Factor Underlying the Effect of Global Warming on Climate Change by Mao et al. (pdf here). I believe many visitors here would find …

2019-01-22 06:00   Click to comment

Bob Tisdale: Does The Climate-Science Industry Purposely Ignore A Simple Aspect of Strong El Niño Events That Causes Long-Term Global Warming?

PREFACE It was a little more than 10 years ago that I published my first blog posts on the obvious upward steps in the sea surface temperatures of a large portion of the global oceans…upward steps that are caused by …

2019-01-20 10:00   Click to comment

Bob Tisdale: Greenland Near-Surface Land Air Temperature Data from Berkeley Earth Present Some Surprises

I enjoy surprises in data, especially when they might make alarmists unhappy. Willis Eschenbach’s post Greenland Is Way Cool at WattsUpWithThat prompted me to take a look at the Berkeley Earth edition of the Greenland TAVG temperature data. See Figure …

2019-01-13 22:00   Click to comment

Bob Tisdale: “…it is the change in temperature compared to what we’ve been used to that matters.” – Part 3

In this post, we’re going to present monthly mean TMIN and TMAX Near-Land Surface Air Temperatures (not in anomaly form) for a group of ten (10) Countries in an effort to add a little perspective to global warming. The list …

2018-12-24 10:00   Click to comment

Bob Tisdale: “…it is the change in temperature compared to what we’ve been used to that matters.” – Part 2

In this post, we’re going to present graphs that show the annual lowest TMIN and highest TMAX Near-Land Surface Air Temperatures (not in anomaly form) for ten (10) Countries in an effort to add some perspective to global warming. The …

2018-12-15 10:00   Click to comment

Bob Tisdale: Examples of How the Use of Temperature ANOMALY Data Instead of Temperature Data Can Result in WRONG Answers

This post comes a couple of weeks after the post EXAMPLES OF HOW AND WHY THE USE OF A “CLIMATE MODEL MEAN” AND THE USE OF ANOMALIES CAN BE MISLEADING (The WattsUpWithThat cross post is here.) INTRO I was preparing a …

2018-12-14 02:00   Click to comment

Bob Tisdale: “…it is the change in temperature compared to what we’ve been used to that matters.” – Part 1

In this post, we’re going to present monthly TMIN and TMAX Near-Land Surface Air Temperature data for the Northern and Southern Hemispheres (not in anomaly form) in an effort to add a little perspective to global warming. And at the …

2018-12-09 02:00   Click to comment

Bob Tisdale: Have The Poorest Countries Been Hit Hardest By Climate Change/Global Warming?

One of the constantly repeated, sympathy-seeking (and basis for wealth distribution) messages by politicians, by alarmists, by the mainstream media, and by brainwashed good-intentioned people, is that the world’s poorest countries have been hit hardest by human-induced global warming/climate change. …

2018-12-07 18:00   Click to comment

Bob Tisdale: WMO Reasoning behind Two Sets of “Normals” a.k.a. Two Periods of Base Years for Anomalies

Most of us are familiar with the World Meteorological Organization (WMO)-recommended 30-year period for “normals”, which are also used as base years against which anomalies are calculated. Most, but not all, climate-related data are referenced to 30-year periods. Presently the …

2018-12-04 01:00   Click to comment

Bob Tisdale: GISS Makes a Useful Reference Disappear from their Land-Ocean Temperature Index Data Page

The bottom of the data page for the GISS Land-Ocean Temperature Index used to (past tense) include a useful reference. But that reference was deleted in January 2016 and has been gone ever since, as far as I can tell. …

2018-12-01 13:45   Click to comment

Bob Tisdale: EXAMPLES OF HOW AND WHY THE USE OF A “CLIMATE MODEL MEAN” AND THE USE OF ANOMALIES CAN BE MISLEADING

Alternate Title: An Average of Climate Models, Which Individually Give Wrong Answers, Cannot, By Averaging Them, Give the Right Answer, So A Model Mean Can Be Very Misleading. And The Use of Anomalies in Model-Data Comparisons, When Absolute Values Are Known, Can Also Be …

2018-11-29 15:00   Click to comment

Bob Tisdale: What Was Earth’s Preindustrial Global Mean Surface Temperature, In Absolute Terms Not Anomalies, Supposed to Be?

And What Have the Average Temperatures of Earth’s Surfaces Been Recently in Absolute Terms, Not Anomalies? The answers may surprise you. Recently, the Intergovernmental Panel on Climate Change (IPCC) and the U.S. Global Change Research Program (USGCRP) have cranked up …

2018-11-27 12:30   Click to comment

Bob Tisdale: Alarmists Will NOT Like This Part of the Recently Published U.S. Climate Science Special Report

Chapter 6 – Temperature Changes in the United States of the U.S. Global Change Research Program’s recently published Climate Science Special Report (2017) clearly shows and discusses, under the heading of “6.1.2 Temperature Extremes”, how temperature extremes for the contiguous …

2018-11-25 00:07   Click to comment

Bob Tisdale: October 2018 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

As you’ll soon see, there was an eye-catching uptick (+0.25 deg C) in the GISS global Land-Ocean Temperature Index (LOTI) data from September to October 2018. We’ll have to wait for next month’s update to see if it also appears …

2018-11-15 17:25   Click to comment

Bob Tisdale: A Quick Post before the Monthly Global Surface and TLT Temperature Update

I’m adding Two Graphs to my Monthly Global Surface and TLT Temperature Updates. The new graphs are being added for a simple reason: to provide different perspectives on the increases in global temperatures since 1979. The graphs are of Berkeley …

2018-11-14 13:31   Click to comment

Bob Tisdale: A Must Read for Those Involved with the IPCC and Other Alarmists:

See Update 1 near the end of the post. # # # Hans Rosling’s book Factfulness: Ten Reasons We’re Wrong About the World–and Why Things Are Better Than You Think In her October 31, 2018 post Systematically Ignorant Nobel Laureates …

2018-11-14 12:32   Click to comment

Bob Tisdale: Do Doomsters Know How Much Global Surface Temperatures Cycle Annually?

Alternate Title: The Annual Cycle in Global Land+Ocean Surface Temperature IS Far Greater Than 1.5 Deg C, AND Much-Much-MUCH Greater Than 1.5 Deg C Annually for Global Land Air Surface Temperatures We all were taught early in school that the …

2018-11-05 10:58   Click to comment

Bob Tisdale: FRIDAY FUNNY – At Long Last, Kevin Trenberth’s Missing Heat May Have Been Found! Repeat, May Have Been

UPDATED: See the update at the end of the post about climate sensitivity. # # # Alternate title: Press Release Plus Mainstream Media & Blogosphere Responses to Resplandy et al. 2018 Before we get to the fun stuff, the paper …

2018-11-02 10:03   Click to comment

Bob Tisdale: Another Look at Michael Crichton’s ‘State of Fear’ – Part 1

SUBTITLE: Nobody Knows How Much of the Global Surface Warming from 1861 to 2005 Is Human-induced or Naturally Occurring. Climate Scientists Are Only Guessing. And Their Guesses Are Based on How They Program Their Computer Models to Meet the Expectations …

2018-10-30 12:12   Click to comment

Bob Tisdale: Friday Funny: Yet Another Celeb Chimes in on Climate Change

This time it’s George R.R. Martin, author of the A Song of Ice and Fire series of novels, on which HBO based its TV series Game of Thrones. For this post, I originally wrote Mr. Martin a long open letter …

2018-10-26 10:39   Click to comment

Bob Tisdale: September 2018 Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly Update

This post provides updates of the values for the three primary suppliers of global land+ocean surface temperature reconstructions—GISS through September 2018 and HADCRUT4 and NOAA NCEI (formerly NOAA NCDC) through August 2018—and of the two suppliers of satellite-based lower troposphere …

2018-10-18 10:25   Click to comment

Bob Tisdale: The New RSS TLT Data is Unbelievable! (Or Would That Be Better Said, Not Believable?) A quick Introduction

In advance of my September 2018 global surface and lower troposphere temperature anomaly update, this is a very quick introduction to the new (over a year old) lower troposphere temperature anomaly data from RSS (Remote Sensing Systems)…just three graphs. As …

2018-10-16 09:06   Click to comment

Bob Tisdale: A Very Quick Introduction to NOAA’s New “Pause-Buster 2” Sea Surface Temperature Dataset ERSST.v5

I will soon be publishing again my Monthly Global Surface (Land+Ocean) and Lower Troposphere Temperature Anomaly posts at my blog ClimateObservations and at WattsUpWithThat . Since my last update back in December 2015, NOAA has once again revised their Extended …

2018-10-14 10:35   Click to comment

Bob Tisdale: Nothing Unprecedented about The Sea Surface Temperatures for Tropical Storm-Hurricane Florence’s Full Storm Track

It’s been a couple of weeks since Hurricane Florence made landfall as a Category 1 storm. The weakening from a Category 4 storm must’ve really tweaked alarmists. NOAA just updated their much-adjusted ERSST.v5 sea surface temperature dataset to include September …

2018-10-03 20:27   Click to comment

Bob Tisdale: August 2018 Hurricane Region Sea Surface Temperatures, in Advance of the Peak Hurricane Month and Florence Making Landfall, Assuming She Does

September is upon us, and September is the peak month for hurricane activity in the North Atlantic. (See the NOAA Hurricane Climatology graph via Wikipedia.) So, to check the temperature conditions leading up to the peak month, let’s take a look …

2018-09-10 23:07   Click to comment

Bob Tisdale: Sea Surface Temperature Anomalies of the Patch of Warmer-Than-Normal Waters in the North Atlantic

With Hurricane/Tropical Storm Florence approaching the continental United States, the patch of warmer-than-normal waters at mid-latitudes of the North Atlantic (see Figure 1) is sure to generate some nonsensical statements about human-induced global warming-climate change from the mainstream media and …

2018-09-09 12:14   Click to comment

Bob Tisdale: Open Letter to U.S. Politicians Running for Office in 2018

Honorable Ladies and Gentlemen: I suspect many of you have been and will be using global warming and climate change as issues during your campaigns this election year. Let me call attention to a quote from revered British Prime Minister …

2018-09-01 16:06   Click to comment


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