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Dr. Matthew M. Wielicki Profile picture
@MatthewWielicki
May 23 • 4 tweets • 3 min read Twitter logo Read on Twitter
A flood event in Italy is not climate it's weather. There has been a decrease in floods in #Italy since 1950. #italyflood #italyfloods

Source: data.4tu.nl/datasets/5555a… Image
Fires in Canada are not climate they are weather. Fires in Canada have decreased since 1989. Source: cwfis.cfs.nrcan.gc.ca/ha/nfdb #CanadaFires #AlbertaWildfires #climate Image
Stop catastrophizing every weather event you relentless fear-mongers... And learn the difference between a weather events and climatic trends. 🤦‍♂️
irrationalfear.substack.com/p/weather-even… Image

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More from @MatthewWielicki

Dr. Matthew M. Wielicki Profile picture
Apr 1
This comment by @IPCC_CH is incorrect. There has been NO increase in the frequency or intensity of extreme weather events 👇. The increase from the '70s to the late 90's is an artifact of increased global interconnectivity and better reporting. In fact, the @UN Office of...
...Disaster Risk Reduction (@UNDRR) was started in late 1999. In reality, in the last 25 years, the number of natural disasters and extreme weather events has DECLINED. Let's look at costs and damage...
The losses associated with natural disasters normalized to GDP, to account for population growth and increases in infrastructure in disaster-prone areas, have also DECLINED. Let's look at deaths...
Read 4 tweets
Dr. Matthew M. Wielicki Profile picture
Mar 5
Why do geologists think that fossil fuels are the remains of fossilized organisms?

1) Geological evidence: Fossil fuels are found in sedimentary rocks that are typically formed from the accumulation of sediments at the bottom of oceans or lakes. 1/5
2) Chemical composition: Fossil fuels are primarily composed of hydrocarbons, which are molecules made up of hydrogen and carbon atoms. These molecules are similar in composition to the organic material found in living organisms, such as plants and animals. 2/5
3) Isotopic signatures: The carbon isotopic signature of fossil fuels is similar to that found in living organisms. This isotopic ratios is due to the fact that plants and animals preferentially use Carbon-12 during photosynthesis and respiration. 3/5
Read 5 tweets
Dr. Matthew M. Wielicki Profile picture
Mar 5
What role does Earth's magnetosphere play in climate change?
The Earth's magnetosphere plays an important role in protecting the planet from harmful solar radiation and charged particles. However, its direct impact on the Earth's climate is not yet fully understood. 1/5
One way in which the magnetosphere can indirectly affect climate is by modulating the amount of cosmic rays that reach the Earth's surface. Cosmic rays are high-energy particles that originate from outside our solar system and can impact cloud formation by ionizing... 2/5
...molecules in the atmosphere. Changes in cosmic ray flux can therefore potentially influence cloud cover and thus the Earth's climate. Additionally, the Earth's magnetic field can affect the distribution and circulation of charged particles in the atmosphere... 3/5
Read 5 tweets
Dr. Matthew M. Wielicki Profile picture
Mar 5
Climate proxies are indirect measurements of past climate conditions that can provide insights into how the Earth's climate has changed over time. However, there are several sources of error associated with climate proxies that can limit their accuracy and reliability. 1/7
One source of error is natural variability. Climate proxies are influenced by natural fluctuations in the Earth's climate system, such as changes in solar radiation, volcanic activity, and ocean currents. These natural variations can make it difficult to distinguish... 2/7
...between changes in climate that are due to human activities, such as greenhouse gas emissions, and those that are due to natural factors. Another source of error is the quality of the proxy data itself. Some types of climate proxies, such as tree rings or ice cores... 3/7
Read 7 tweets
Dr. Matthew M. Wielicki Profile picture
Mar 4
The essential crux of the anthropogenic global warming theory is that for the past 800k years, global atmospheric CO2 concentrations only fluctuated between 180-300ppm and thus the increase to the current levels of 420ppm is from anthropogenic emissions. But, how good are...
...ice cores at recording short-term fluctuations in atmospheric CO2 concentration? In order to address this question one must look at how glacial ice forms and on what timescales. In the figure below you can see that it takes long periods of time to form glacial ice. Thus...
...ice cores are not very good at recording short-term fluctuations. Another way to investigate past CO2 levels is through the density of plant stomata. Stomata are cell structures found in tree leaves and needles that help promote plant growth. Their density on leaves is...
Read 4 tweets
Dr. Matthew M. Wielicki Profile picture
Mar 4
Modern records cannot be spliced onto proxy records because proxy records, such as ice cores, tree rings, or sediment cores, represent historical climate information from the past. These records are used to reconstruct past climate conditions and provide a baseline...
... for understanding how the climate has changed over time.
Modern records, on the other hand, are direct measurements of present-day climate conditions, such as temperature, precipitation, and atmospheric composition. While they can provide valuable information about...
...current climate trends, they cannot be spliced onto proxy records because they represent different time periods and different types of climate data.
In order to use proxy records to understand current climate conditions, scientists must use statistical techniques to...
Read 5 tweets

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