how to cite ERS5-land

 

How to cite ERA5-Land

(1) Please acknowledge the use of ERA5-Land as stated in the Copernicus C3S/CAMS License agreement:

• "5.1.2 Where the Licensee communicates or distributes Copernicus Products to the public, the Licensee shall inform the recipients of the source by using the following or any similar notice: 'Generated using Copernicus Climate Change Service Information [Year]'.

• 5.1.3 Where the Licensee makes or contributes to a publication or distribution containing adapted or modified Copernicus Products, the Licensee shall provide the following or any similar notice: 'Contains modified Copernicus Climate Change Service Information [Year]';

Any such publication or distribution covered by clauses 5.1.1 and 5.1.2 shall state that neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus Information or Data it contains."

(2) cite the ERA5-Land dataset (as part of the bibliography) as follows:

• For "ERA5-Land hourly data from 1981 to present" downloaded from the Climate Data Store:

Muñoz Sabater, J., (2019): ERA5-Land hourly data from 1981 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). (<date of access>), 10.24381/cds.e2161bac

• For "ERA5-Land monthly averaged data from 1981 to present" downloaded from the Climate Data Store:

Muñoz Sabater, J., (2019): ERA5-Land monthly averaged data from 1981 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). (<date of access>), 10.24381/cds.68d2bb30

worldmet

Functions to import data from more than 30,000 surface meteorological sites around the world managed by the National Oceanic and Atmospheric Administration (NOAA) Integrated Surface Database (ISD, see ). https://cran.r-project.org/web/packages/worldmet/index.html https://github.com/davidcarslaw/worldmet Hong note: it seems worldmet only provide pre-defined sites. In Bukhari et al, 2020, effects of weather on coronavirus pandmic, USA weather were provided at the state level. For many other countries, weather were estiamted from the busiest airports.

down load ERA5 land hourly data

 

ERA5 land hours data was last updated on July 12. 

I selected all 2020, all day, and all hours, it is 45.8 GB, which will take 12 hours to download at home.

I ssh into my simcenter workstation, 

wget url, 

which runs with an estimated time of a little over 2 hours. 

2m dew point, ERA5

In Kelvin

Temperature to which the air, at 2 metres above the surface of the Earth, would have to be cooled for saturation to occur.It is a measure of the humidity of the air. Combined with temperature and pressure, it can be used to calculate the relative humidity. 2m dew point temperature is calculated by interpolating between the lowest model level and the Earth's surface, taking account of the atmospheric conditions. Temperature measured in kelvin can be converted to degrees Celsius (°C) by subtracting 273.15.

https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-land?tab=overview


Low dew point == low humidity according to wikipedia, because less vapor is need for condensation
https://en.wikipedia.org/wiki/Dew_point

Dew point		Relative humidity at 32 °C (90 °F)
Over 26 °C	Over 80 °F	73% and higher
24–26 °C	75–80 °F	62–72%
21–24 °C	70–74 °F	52–61%
18–21 °C	65–69 °F	44–51%
16–18 °C	60–64 °F	37–43%
13–16 °C	55–59 °F	31–36%
10–12 °C	50–54 °F	26–30%
Under 10 °C	Under 50 °F	25% and lower

This seems to explain that the condensation on leaves is often seen in the early morning, but not during the daytime. So, if a mutant strain has a lower dew point, it tend be in drier locations. If a strain has a higher dew point, it tends to be more humid locations