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there is a big difference in weather data between three locations in one city

asked 2019-09-30 08:51:29 -0600

tiantian's avatar

Hello, everyone. Is it possible that there is a big difference in weather data between three locations in one city? I need to use the weather data of Harbin, China. There are three stations (509530_IWEC, 509530_CSWD, and 509530_SWERA). I compared their monthly direct normal radiation. The results are quite different, especially the trends are different.The data for CSWD looks normal to me. It is strange that for IWEC, there is a peak in March and the minimal value appears in July.

Harbin-IWEC-montly direct norma radiation (Wh/m2-day) Jan: 145; Feb: 184; Mar: 210; Apr: 174; May: 153; Jun: 151; Jul: 105; Aug: 131; Sep: 136; Oct: 148; Nov: 121; Dec: 107.

Harbin-CSWD-montly direct norma radiation (Wh/m2-day) Jan: 74; Feb: 89; Mar: 174; Apr: 163; May: 210; Jun: 240; Jul: 208; Aug: 178; Sep: 146; Oct: 123; Nov: 97; Dec: 69.

Harbin-SWERA-montly direct norma radiation (Wh/m2-day) Jan: 114; Feb: 124; Mar: 147; Apr: 144; May: 161; Jun: 165; Jul: 149; Aug: 179; Sep: 189; Oct: 181; Nov: 128; Dec: 102.

Does anyone know the possible reason for this difference? Thanks in advance.

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answered 2019-10-01 05:59:06 -0600

BrunoRaviolo's avatar

Not only there are different methodologies for building weather files, but the datasets (raw data) used for those files may also vary accordingly (specification of weather station, running time, etc). You should check first which kind of weather file your simulation simulation requires, and then choose the most appropriate weather file.

Check the chapter 3 from this book:

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Thanks, Bruno. It helps a lot.

tiantian's avatar tiantian  ( 2019-10-10 04:39:35 -0600 )edit

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Asked: 2019-09-30 08:51:29 -0600

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Last updated: Sep 30 '19