New App: HTAP regions
import from:
htap_regions.nc
(points to original_data_files/HTAP_regions_v2/HTAP_Phase2_tier1NC01x01_v2.nc)
The TFHTAP initiative defined a set of 17 region codes ("tier1") for source-receptor analysis. These regions are described in HTAP2_region_definition_document_v4a.docx, available at http://iek8wikis.iek.fz-juelich.de/HTAPWiki/WP2.1. Here one can also find gridded 0.1 degree netcdf data files with region masks. For the extraction of HTAP region codes, the station lon and lat information is simply mapped to the nearest grid location and the corresponding value in the netcdf file is returned. Note that HTAP in tier 1 defines only one region code for all ocean regions.
Region codes:
02 Non-arctic/Antarctic Ocean
03 US+Canada (upto 66 N; polar circle)
04 Western + Eastern EU+Turkey (upto 66 N polar circle)
05 South Asia: India, Nepal, Pakistan, Afghanistan, Bangadesh, Sri Lanka
06 East Asia: China, Korea, Japan
07 South East Asia
08 Pacific, Australia+ New Zealand
09 Northern Africa+Sahara+Sahel
10 Sub Saharan/sub Sahel Africa
11 Middle East: S. Arabia, Oman, etc, Iran, Iraq
12 Mexico, Central America, Caribbean, Guyanas, Venezuela, Columbia
13 South America
14 Russia, Belarussia, Ukraine
15 Central Asia
16 Arctic Circle (North of 66 N)+Greenland
17 Antarctic
Data source:
http://iek8wikis.iek.fz-juelich.de/HTAPWiki/WP2.1?action=AttachFile&do=view&target=_outputNC_20140124.tar.gz
Scripts:
extract_htap_regions.py - extract HTAP region codes at all TOAR database stations. Original
longitudes are given as 0..360 and are converted to -180..+180.