REAS數據之下載

Table of contents

數據下載
- 下載解壓縮
- 資料結構分析
Reference

數據下載

來源：日本國立環境研究所
- 按照年代、污染項目儲存
- Gridded Data Sets, see Information for Data
注意
- 共10個污染物質項目、270個文字檔案
- 部分物質名稱之後有底線_
- 雖然標題為Gridded Data，目錄下仍然也都有點源檔案

下載解壓縮

for s in SO2 NOX CO_ PM10_ PM2.5 BC_ OC_ NMV NH3 CO2;do 
  wget https://www.nies.go.jp/REAS/REASv3.2.1_Grid/$s/${s}_2015_GRID.tar.gz
  tar xvfz ${s}_2015_GRID.tar.gz
done

資料結構分析

os.system('findc  "REAS*" >fnames.txt')
os.system('for i in $(cat fnames.txt);do grep "/mon" $i|cut -d[ -f1;done >spec.txt')
with open('spec.txt','r') as f:
  l=[i.strip('\n').strip('_') for i in f]
fname_spec={i.split()[0]:i.split()[1] for i in l}
nmv=set([fname_spec[f] for f in fnames if 'NMV' in f]) #共21-2(NMV, Total_NMV)種VOC
specNonV=set([fname_spec[f] for f in fnames if 'NMV' not in f]) #共9種CNPS，part(BC,OC,PM2.5,PM10),CO2,ACNS

可以得到所有的成分共29種

Reference

Kurokawa, J. and Ohara, T. (2020). Long-term historical trends in air pollutant emissions in Asia: Regional Emission inventory in ASia (REAS) version 3. Atmospheric Chemistry and Physics 20 (21):12761–12793. doi:10.5194/acp-20-12761-2020.