Create variable aqiw2dno2
Process Step
Description Compute target variable ‘aqiw2dno2’ based on ‘aqiwdno2’, ‘region’ and ‘date’. The worst value for the pollutant across a date and the date before becomes the value of the target variable
This step uses a script written in Python3.
Diagram of the Process Step
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Step [
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# input parameter
parameter_7d6e0e95_572c_40a5_82e4_bc51a2a68c77 [
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URL="https://ess-search.nsd.no/en/variable/c9ae5e2b-376b-436d-abd8-f86879f8dc45"
target="_blank"
label=<<i>Variable date:</i><br/>Date>
tooltip="Input parameter for current process step"
fillcolor="#ffe119"
];
parameter_7d6e0e95_572c_40a5_82e4_bc51a2a68c77:e -> Step:w [
minlen="2"
];
# previous step
step_70b92d2b_cc0a_44a7_9b1b_1e84084f4c50 [
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width="2"
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fontsize="10pt"
label="Create variable date"
URL="../step_70b92d2b-cc0a-44a7-9b1b-1e84084f4c50.html"
target="_parent"
tooltip="Previous process step:\nUse variables 'DatetimeBegin' and 'DatetimeEnd' to create variable 'date'."
];
step_70b92d2b_cc0a_44a7_9b1b_1e84084f4c50:e -> parameter_7d6e0e95_572c_40a5_82e4_bc51a2a68c77:w [
minlen="2"
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parameter_87419b24_5963_48e7_8db9_0c6edf44bce6 [
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fontsize="10pt"
URL="https://ess-search.nsd.no/en/variable/99d07034-b859-4c28-801e-6accb5e9f9da"
target="_blank"
label=<<i>Variable region:</i><br/>Region>
tooltip="Input parameter for current process step"
fillcolor="#ffe119"
];
parameter_87419b24_5963_48e7_8db9_0c6edf44bce6:e -> Step:w [
minlen="2"
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parameter_0cb5b141_7c62_4d67_84a5_9c4a6e3cb8d1 [
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style="filled"
width="2"
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URL="https://ess-search.nsd.no/en/variable/d72f021d-bb04-4b0f-bcca-d8d28daaf6d1"
target="_blank"
label=<<i>Variable aqiwdno2:</i><br/>Worst air quality index<br/>level NO2, date>
tooltip="Input parameter for current process step"
fillcolor="#ffe119"
];
parameter_0cb5b141_7c62_4d67_84a5_9c4a6e3cb8d1:e -> Step:w [
minlen="2"
];
# previous step
step_5d4a2d9d_54f8_419e_a4b5_4ef2223dceaa [
shape="rect"
style="filled, rounded"
width="2"
height="0.075"
fontcolor="white"
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fontsize="10pt"
label="Create variable aqiwdno2"
URL="../step_5d4a2d9d-54f8-419e-a4b5-4ef2223dceaa.html"
target="_parent"
tooltip="Previous process step:\nCompute target variable 'aqiwdno2' starting from variables 'Concentration' and 'AirPollutant = NO2' for each background station. Compute where 'AirQualityStation' has values for the pollutant. Find 'Concentration' value at the 99th percentile for the pollutant. Create EEA Air Quality Index where NO2: 0 to 40 eq 'Good' represented by value '0'; 40 to 90 eq 'Fair' represented by value '1'; 90 to 120 eq 'Moderate' represented by value '2'; 120 to 230 eq 'Poor' represented by value '3'; 230 to 340 eq 'Very Poor' represented by value '4'; 340 to 1000 eq 'Extremely Poor' represented by value '5'. The worst air quality level measured on a specific day on one of the background stations in the region provides values to the variable."
];
step_5d4a2d9d_54f8_419e_a4b5_4ef2223dceaa:e -> parameter_0cb5b141_7c62_4d67_84a5_9c4a6e3cb8d1:w [
minlen="2"
];
# output parameter
parameter_54b03ec0_08d3_449f_8a6b_2a51370d7c6f [
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style="filled"
width="2"
height="0.1"
fontcolor="blue"
fontsize="10pt"
URL="https://ess-search.nsd.no/en/variable/99440d59-e468-4eb1-b46a-294afd20461d"
target="_blank"
label=<<i>Variable aqiw2dno2:</i><br/>Worst air quality index<br/>level NO2, last two days>
tooltip="Output parameter for current process step"
fillcolor="#dcbeff"
];
Step:e -> parameter_54b03ec0_08d3_449f_8a6b_2a51370d7c6f:w [
minlen="2"
];
# following step
step_1a6476be_23a9_4e0f_9a48_f70307579001 [
shape="rect"
style="filled, rounded"
width="2"
height="0.075"
fontcolor="white"
fillcolor="#4363d8"
fontsize="10pt"
label="Create variable aqiw2d"
URL="../step_1a6476be-23a9-4e0f-9a48-f70307579001.html"
target="_parent"
tooltip="Following process step:\nCompute target variable 'aqiw2d ' based on 'aqiw2dpm10'; 'aqiw2dpm2_5'; 'aqiw2dso2'; 'aqiwdno2'; 'aqiw2do3', 'region' and 'date'. The maximum value across the source variables becomes the value of the target variable"
];
parameter_54b03ec0_08d3_449f_8a6b_2a51370d7c6f:e -> step_1a6476be_23a9_4e0f_9a48_f70307579001:w [
minlen="2"
];
}
Hint
Move the mouse cursor over a parameter to see more information. Click on a parameter or a related step to go to the corresponding page.
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# input parameter
InputParameter [
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OutputParameter [
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Step -> OutputParameter [
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