Dr. Roland Quast - CORONA AND CLIMATE

FACT

Temperature decreases with altitude, in dry air more than in clouds.

Up to the end of the troposphere at an altitude of about 11 km, the temperature decreases evenly in a linear fashion, always assuming that the weather is stable weather situation.

per 100 meters, the temperature decreases by about 1°C in dry air. When this air mass condenses during the ascent due to cooling energy is released.

This process lowers the cooling rate of rising air per 100 m to approx. 0.7 °C. In the process, the air becomes dryer.

Temperature and Pressure Rates

In addition an analysis of the meteorologically and geographically given conditions: Different sea levels should be seen epidemiologically differently. Temperature, humidity and UV radiation are different at different altitudes.

Another point that can influence the spread of the virus is the air flow.

In strong air currents (westerly wind, easterly wind), the virus is transported by the wind in an aerosol with a lifespan of up to four days.

Air currents can also lead to a deviation of the congruence of the Corona infection map with the geographic relief map, depending on the wind direction, air currents cantilever over the mountains and transport viruses in aerosols.

While searching for correlations, we found a study from China on the Internet with an interesting result:

1 °C increase in temperature makes a reduction in the infection rate from 3 %

The relationship of temperature and humidity to the incidence of COVID-19 infection/disease is not consistent; however, in the literature several studies have shown a decrease of infections.

The work of Wu (Effects of temperature and humidity on the daily new cases and new deaths of COVID-19 in 166 countries ) describes effects that may be consistent with the observations described above.

Effects of temperature and humidity on the daily new cases and new deaths of COVID-19 in 166 countries

Yu Wu 1, Wenzhan Jing 1, Jue Liu 1, Qiuyue Ma 1, Jie Yuan 1, Yaping Wang 1 Min Du 1, Min Liu 2 Affiliations

PMID: 32361460

PMCID: PMC7187824

DOI: 10.1016/j.scitotenv.2020.139051 Free PMC article

There is much longer virus persistence in cold air than at higher temperatures.

The effect of humidity overlaps the curve. Persistence is lowest at a relative humidity of 60%; this is true at both high temperatures and low, with the effect of humidity being less pronounced at low temperatures than at higher temperatures.

Correlation of virus titer, temperature and relative humidity:

2020 Nov 16;2020.11.13.20231472.

doi: 10.1101/2020.11.13.20231472. Preprint

Role of air temperature and humidity in the transmission of SARS-CoV-2 in the United States

Yiqun Ma, Sen Pei, Jeffrey Shaman, Robert Dubrow, Kai Chen

PMID: 33236018

PMCID: PMC7685329

DOI: 10.1101/2020.11.13.20231472

Dylan et al. make a dependence of the infectivity of SARS-CoV-2 on air temperature and humidity highly probable.

We found a calculator for the estimated airborne decay of SARS-CoV-2 under a range of temperatures, relative humidity and UV-Index on the official website of the Department of Homeland Security in the United States.

Homeland Security adds to temperature and relative humidity a third criterion: UV radiation and developed a calculator.

wetter.de has probably adopted the Homeland Security algorhythm.

This weather report gives the corona decay in hours.

This information is likely to be based on the SARS-CoV-2 Surface Decay Calculator of the Homeland Security of the USA.

Note the occultation and solar irradiance in relation to the Corona decay

Weather report from wetter.de with indication of the Corona decay index.

Under cloud cover, the decay time of the corona virus is 12 hours; under sunny conditions, it is 2 hours.

"Epidemic models do not take into account the impact of climatic conditions on the transmission dynamics of viruses."

This study confirms on a scientific basis the influence of seasons on the spread of coronavirus, the transmission of viruses via the air and the outbreak of pandemics over a whole year.

Using data obtained from high-fidelity multiphase fluid dynamics simulations, we calculate the concentration rate of Coronavirus particles in contaminated saliva droplets and derive a new airborne infection rat.

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