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Watts Up With That

Roy Spencer

  • Urbanization Effects on GHCN Temperature Trends, Part III: Using Population Density, 1880-2015
    This is the third in my (never-ending, it appears) series on measuring the effect of Urban Heat Islands (UHI) on land surface temperature trends. In Parts I and II I emphasized the Landsat-based “built-up” structure dataset as a proxy for urbaniz…
    - 12 days ago 17 Mar 23, 8:30pm -
  • UAH Global Temperature Update for February, 2023: +0.08 deg. C
    The Version 6 global average lower tropospheric temperature (LT) anomaly for February 2023 was +0.08 deg. C departure from the 1991-2020 mean. This is up from the January 2023 anomaly of -0.04 deg. C. The linear warming trend since January, 1979 rema…
    - 26 days ago 3 Mar 23, 12:45pm -
  • Urbanization Effects on GHCN Temperature Trends, Part II: Evidence that Homogenization Spuriously Warms Trends
    In Part I I showed the Landsat satellite-based measurements of urbanization around the Global Historical Climate Network (GHCN) land temperature-monitoring stations. Virtually all of the GHCN stations have experienced growth in the coverage of human…
    - 50 days ago 7 Feb 23, 4:34pm -
  • UAH Global Temperature Update for January, 2023: -0.04 deg. C
    The Version 6 global average lower tropospheric temperature (LT) anomaly for January 2023 was -0.04 deg. C departure from the 1991-2020 mean. This is down from the December 2022 anomaly of +0.05 deg. C. The linear warming trend since January, 1979 no…
    - 56 days ago 1 Feb 23, 3:01pm -
  • Urbanization Effects on GHCN Temperature Trends, Part I: The Urbanization Characteristics of the GHCN Stations
    I’ve previously posted a variety of articles (e.g. here and here) where I address the evidence that land surface temperature trends from existing homogenized datasets have some level of spurious warming due to urban heat island (UHI) effects. While…
    - 74 days ago 14 Jan 23, 12:30pm -
  • UAH Global Temperature Update: 2022 was the 7th Warmest of 44-Year Satellite Record
    December of 2022 finished the year with a global tropospheric temperature anomaly of +0.05 deg. C above the 1991-2020 average, which was down from the November value of +0.17 deg. C. The average anomaly for the year was +0.174 deg. C, making 2022 the…
    - 85 days ago 3 Jan 23, 1:02pm -
  • A reminder on commenting here…
    … if you haven’t had a comment approved here before, I will need to approve your first one. Then your comments should be approved automatically after that. Sometimes I get busy and won’t check for several days, but I will try to check once or t…
    - 97 days ago 22 Dec 22, 6:00pm -
  • Climate Sensitivity from 1970-2021 Warming Estimates
    In response to reviewers’ comments on a paper John Christy and I submitted regarding the impact of El Nino and La Nina on climate sensitivity estimates, I decided to change the focus enough to require a total re-write of the paper. The paper now ad…
    - 19 Dec 22, 2:39pm -
  • UAH Global Temperature Update for November, 2022: +0.17 deg. C
    Sorry for the late posting of the global temperature update, I’ve been busy responding to reviewers of one of our papers for publication. The Version 6 global average lower tropospheric temperature (LT) anomaly for November 2022 was +0.17 deg. C de…
    - 6 Dec 22, 12:31pm -
  • An Apology to Willis Eschenbach
    It has been brought to my attention that I owe Willis Eschenbach an apology, based upon a comment I made on my blog: “I’ve previously commented on Willis thermostat hypothesis of climate system regulation, which Willis never mentioned was origina…
    - 24 Nov 22, 10:55am -

Reddit Weather Feed

American Meteorological Society

University of Reading

  • Two Flavours of Ocean Temperature Change and the Implication for Reconstructing the History of Ocean Warming
    Introducing Excess and Redistributed Temperatures.  By: Quran Wu Monitoring and understanding ocean heat content change is an essential task of climate science because the ocean stores over 90% of extra heat that is trapped in the Earth system. Ocea…
    - 16 days ago 13 Mar 23, 1:10pm -
  • Using Old Ships To Do New Science
    By: Praveen Teleti Weather Rescue at Sea: its goals and progress update. Observing the environment around us is fundamental to learning about and understanding the natural world. Before the Renaissance, everyday weather was thought to be works of div…
    - 24 days ago 6 Mar 23, 5:29am -
  • Including Human Behaviour in Models to Understand the Impact of Climate Change on People
    By Megan McGrory In 2020 56% of the global population lived in cities and towns, and they accounted for two-thirds of global energy consumption and over 70% of CO2 emissions. The share of the global population living in urban areas … Continue readi…
    - 38 days ago 20 Feb 23, 5:19am -
  • Making Flights Smoother, Safer, and Greener
    By: Paul Williams Atmospheric turbulence is the leading cause of weather-related injuries to air passengers and flight attendants. Bumpy air is estimated to cost the global aviation sector up to $1bn annually, and evidence suggests that climate chang…
    - 44 days ago 13 Feb 23, 8:28am -
  • From Ürümqi to Minneapolis: Clustering City Climates with Self-Organising Maps
    By: Niall McCarroll As a Research Software Engineer, my job involves developing, testing and maintaining software that scientists can use to analyse earth observation and climate data.  Recently I’ve been developing some software that can be used…
    - 52 days ago 6 Feb 23, 5:45am -
  • How On Earth Do We Measure Photosynthesis?
    By: Natalie Douglas Photosynthesis is a biological process that removes carbon (in the form of carbon dioxide) from the atmosphere and is therefore a key process in determining the amount of climate change. So, how do we measure it so … Continue re…
    - 59 days ago 30 Jan 23, 5:11am -
  • Using ChatGPT in Atmospheric Science
    By: Mark Muetzelfeldt ChatGPT is amazing. Seriously. Go try it: chat.openai.com/chat. So what is it? It is an artificial intelligence language model that has been trained on vast amounts of data, turning this into an internal representation of the s…
    - 66 days ago 23 Jan 23, 5:45am -
  • Tiny Particles, Big Impact?
    By Laura Wilcox Aerosols are tiny particles or liquid droplets suspended in the atmosphere. They can be created by human activities, such as burning fossil fuels or clearing land, or have natural sources, such as volcanoes. Depending on their composi…
    - 12 Dec 22, 9:11am -
  • Uncrewed Aircraft for Cloud and Atmospheric Electricity Research
    By: Keri Nicoll The popularity and availability of Unmanned Aerial Vehicles (UAVs), has led to a surge in their use in many areas, including aerial photography, surveying, search and rescue, and traffic monitoring.  This is also the case for atmosph…
    - 5 Dec 22, 5:02am -
  • Investigating the Dark Caverns of Antarctica

    - 21 Nov 22, 5:31am -

Met Office

  • Do you know what climate action to take for a safer future?
    The science is clear, the climate is changing. The Met Office is one of the UK’s foremost climate change research centres, carrying out world-leading research. With over 8,100 peer-reviewed articles in scientific literature since 1981, and as a lea…
    - 7 days ago 22 Mar 23, 8:36am -
  • Has it been an unusually cold start to March?
    March heralds the start of Meteorological Spring, and with daffodils, snowdrops and crocuses making an appearance many of us start to think of warmer sunshine and longer days. March 2023 has got off to a cold start, and with numerous … Continue rea…
    - 22 days ago 7 Mar 23, 3:06pm -
  • Glacial archaeology – unlocking the climate time machine
    Glacial archaeology is a new and emerging field made possible by the increasingly rapid melting of mountain ice due to climate change. Recent discoveries have left experts amazed. Dr Doug McNeall, co-host on the Met Office’s Mostly Climate podcast,…
    - 26 days ago 3 Mar 23, 10:55am -
  • Which weather drivers will affect the outlook for March?
    March is the first month of meteorological spring. But what is the outlook for the month? Are we likely to get more spring-like weather, or perhaps something more reminiscent of winter? The outlook suggests that March 2023 is more likely … Continue…
    - 29 days ago 28 Feb 23, 11:40am -
  • Working for climate resilience with the UK water sector
    2022 will be remembered for several meteorological events, including record-breaking heat and a prolonged drought. Eastern England was at the forefront of both events with East Anglia being the driest region in the UK relative to normal for the year.…
    - 30 days ago 27 Feb 23, 11:46am -
  • Dry February so far for most
    With less than a week of February to go, conversations are already being had about how dry the month has been, and what impact this could have.   This month, we’ve been exploring the theme of water security and climate change. … Continue readin…
    - 34 days ago 23 Feb 23, 12:55pm -
  • Freddy: one of the longest-lived tropical cyclones
    Tropical Cyclone Freddy, which has just rocked Madagascar, has been barrelling through the tropical Indian Ocean for 16 days – making it one of the longest-lived systems in the southern hemisphere. It developed on 6 February off the coast of … Co…
    - 35 days ago 22 Feb 23, 3:07pm -
  • Water security and the global water cycle
    Throughout February we’ve been focusing on the climate theme of ‘water security’. To understand water security, we first need to understand the way that water travels around the Earth. In this blog post, we’ll learn about the global water cyc…
    - 36 days ago 21 Feb 23, 12:32pm -
  • One year on from three storms in a week 
    It’s one year since three named storms impacted the UK within seven days in what was the stormiest week since storm names were introduced for the UK in 2015. Here, we look back on what was a week to remember … Continue reading →
    - 40 days ago 17 Feb 23, 2:18pm -
  • Counting on technology in a changing world
    Ever-increasing impacts from climate change, including more frequent and intense bouts of extreme weather, are among the greatest challenges faced by mankind. A changing climate is a daunting prospect. But, says the Met Office’s Theo McCaie, there…
    - 41 days ago 16 Feb 23, 11:57am -