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| Station Name | Country/Territory | GAW ID | Contributor |
|---|---|---|---|
| Alert | Canada | ALT | NOAA/ESRL |
| Amsterdam Island | France | AMS | LSCE |
| Arembepe | Brazil | ABP | NOAA/ESRL |
| Ascension Island | United Kingdom of Great Britain and Northern Ireland | ASC | NOAA/ESRL |
| Assekrem | Algeria | ASK | NOAA/ESRL |
| Baltic Sea | Poland | BAL | NOAA/ESRL |
| Baring Head | New Zealand | BHD | NIWA |
| Baring Head | New Zealand | BHD | NOAA/ESRL |
| Barrow | United States of America | BRW | NOAA/ESRL |
| Begur | Spain | BGU | LSCE |
| Bering Island | Russian Federation | BER | MGO |
| Brotjacklriegel | Germany | BRT | UBA |
| Candle Lake | Canada | CDL | EC |
| Cape Ferguson | Australia | CFA | CSIRO |
| Cape Grim | Australia | CGO | BoM CSIRO |
| Cape Grim | Australia | CGO | NOAA/ESRL |
| Cape Kumukahi | United States of America | KUM | NOAA/ESRL |
| Cape Meares | United States of America | CMO | NOAA/ESRL |
| Cape Ochi-ishi | Japan | COI | NIES |
| Cape Point | South Africa | CPT | SAWS |
| Cape Rama | India | CRI | CSIRO |
| Casey Station | Australia | CYA | CSIRO |
| Chibougamau | Canada | CHM | EC |
| Christmas Island | Kiribati | CHR | NOAA/ESRL |
| Cold Bay | United States of America | CBA | NOAA/ESRL |
| Crozet | France | CRZ | NOAA/ESRL |
| Dwejra Point | Malta | GOZ | NOAA/ESRL |
| East Trout Lake | Canada | ETL | EC |
| Easter Island | Chile | EIC | NOAA/ESRL |
| Egbert | Canada | EGB | EC |
| Estevan Point | Canada | ESP | CSIRO |
| Estevan Point | Canada | ESP | EC |
| Fraserdale | Canada | FSD | EC |
| Gobabeb | Namibia | NMB | NOAA/ESRL |
| Gosan | Republic of Korea | GSN | NIMR |
| Grifton | United States of America | ITN | NOAA/ESRL |
| Guam | United States of America | GMI | NOAA/ESRL |
| Halley Bay | United Kingdom of Great Britain and Northern Ireland | HBA | NOAA/ESRL |
| Hateruma | Japan | HAT | NIES |
| Heimaey | Iceland | ICE | NOAA/ESRL |
| Hohenpeissenberg | Germany | HPB | NOAA/ESRL |
| Hok Tsui | Hong Kong, China | HKG | HKO |
| Izaña (Tenerife) | Spain | IZO | AEMET |
| Jubany | Argentina | JBN | CNR-ICES DNA-IAA |
| Jungfraujoch | Switzerland | JFJ | Empa |
| Jungfraujoch | Switzerland | JFJ | KUP |
| K-puszta | Hungary | KPS | HMS |
| Key Biscayne | United States of America | KEY | NOAA/ESRL |
| Kotelny Island | Russian Federation | KOT | MGO |
| Kyzylcha | Uzbekistan | KYZ | MGO |
| Lac La Biche (Alberta) | Canada | LLB | EC |
| Lampedusa | Italy | LMP | ENEA |
| Lampedusa | Italy | LMP | NOAA/ESRL |
| Lulin | China | LLN | NOAA/ESRL |
| Mace Head | Ireland | MHD | NOAA/ESRL |
| Macquarie Island | Australia | MQA | CSIRO |
| Mahe Island | Seychelles | SEY | NOAA/ESRL |
| Mauna Loa | United States of America | MLO | NOAA/ESRL |
| Mawson | Australia | MAA | CSIRO |
| Mex High Altitude Global Climate Observation Center, Mexico | Mexico | MEX | NOAA/ESRL |
| Minamitorishima | Japan | MNM | JMA |
| Monte Cimone | Italy | CMN | IAFMS |
| Mould Bay | Canada | MBC | NOAA/ESRL |
| Mt. Kenya | Kenya | MKN | NOAA/ESRL |
| Mt. Waliguan | China | WLG | CMA |
| Mt. Waliguan | China | WLG | CMA NOAA/ESRL |
| Natal | Brazil | NAT | NOAA/ESRL |
| Niwot Ridge (T-van) | United States of America | NWR | NOAA/ESRL |
| Ocean Station "M" | Norway | STM | NOAA/ESRL |
| Ocean Station Charlie | Russian Federation | STC | MGO |
| Ochsenkopf | Germany | OXK | NOAA/ESRL |
| Olympic Peninsula | United States of America | OPW | NOAA/ESRL |
| Pacific Ocean (00N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (05N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (05S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (10N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (10S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (15N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (15S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (20N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (20S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (25N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (25S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (30N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (30S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (35S) | N/A | POC | NOAA/ESRL |
| Pallas-Sammaltunturi | Finland | PAL | FMI |
| Palmer Station | United States of America | PSA | NOAA/ESRL |
| Park Falls | United States of America | LEF | NOAA/ESRL |
| Pic du Midi | France | PDM | LSCE |
| Plateau Assy | Kazakhstan | KZM | NOAA/ESRL |
| Plateau Rosa | Italy | PRS | RSE |
| Puy de Dome | France | PUY | LSCE |
| Ragged Point | Barbados | RPB | NOAA/ESRL |
| Ryori | Japan | RYO | JMA |
| Sable Island | Canada | WSA | EC |
| Sand Island | United States of America | MID | NOAA/ESRL |
| Sary Taukum | Kazakhstan | KZD | NOAA/ESRL |
| Schauinsland | Germany | SSL | UBA |
| Sede Boker | Israel | WIS | NOAA/ESRL |
| Shemya Island | United States of America | SHM | NOAA/ESRL |
| Shetland | United Kingdom of Great Britain and Northern Ireland | SIS | CSIRO |
| Sonnblick | Austria | SNB | UBA |
| South China Sea (03N) | N/A | SCS | NOAA/ESRL |
| South China Sea (06N) | N/A | SCS | NOAA/ESRL |
| South China Sea (09N) | N/A | SCS | NOAA/ESRL |
| South China Sea (12N) | N/A | SCS | NOAA/ESRL |
| South China Sea (15N) | N/A | SCS | NOAA/ESRL |
| South China Sea (18N) | N/A | SCS | NOAA/ESRL |
| South China Sea (21N) | N/A | SCS | NOAA/ESRL |
| South Pole | United States of America | SPO | NOAA/ESRL |
| Southern Great Plains | United States of America | SGP | NOAA/ESRL |
| St. Croix | United States of America | AVI | NOAA/ESRL |
| St. David's Head | United Kingdom of Great Britain and Northern Ireland | BME | NOAA/ESRL |
| Summit | Denmark | SUM | NOAA/ESRL |
| Syowa Station | Japan | SYO | NOAA/ESRL |
| Terceira Island | Portugal | AZR | NOAA/ESRL |
| Teriberka | Russian Federation | TER | MGO |
| Tiksi | Russian Federation | TIK | MGO |
| Trinidad Head | United States of America | THD | NOAA/ESRL |
| Tudor Hill | United Kingdom of Great Britain and Northern Ireland | BMW | NOAA/ESRL |
| Tutuila (Cape Matatula) | United States of America | SMO | NOAA/ESRL |
| Ulaan Uul | Mongolia | UUM | NOAA/ESRL |
| Ushuaia | Argentina | USH | NOAA/ESRL |
| Wendover | United States of America | UTA | NOAA/ESRL |
| Yonagunijima | Japan | YON | JMA |
| Zeppelinfjellet (Ny-Alesund) | Norway | ZEP | ITM |
| Zeppelinfjellet (Ny-Alesund) | Norway | ZEP | NOAA/ESRL |
| Zugspitze / Schneefernerhaus | Germany | ZSF | UBA |
| Zugspitze | Germany | ZUG | UBA |
| Station Name | Country/Territory | GAW ID | Contributor |
|---|---|---|---|
| Alert | Canada | ALT | EC |
| Alert | Canada | ALT | NOAA/ESRL |
| Amsterdam Island | France | AMS | LSCE |
| Amsterdam Island | France | AMS | NOAA/ESRL |
| Anmyeon-do | Republic of Korea | AMY | NOAA/ESRL |
| Arembepe | Brazil | ABP | NOAA/ESRL |
| Ascension Island | United Kingdom of Great Britain and Northern Ireland | ASC | NOAA/ESRL |
| Assekrem | Algeria | ASK | NOAA/ESRL |
| Baltic Sea | Poland | BAL | NOAA/ESRL |
| Baring Head | New Zealand | BHD | NOAA/ESRL |
| Barrow | United States of America | BRW | NOAA/ESRL |
| Begur | Spain | BGU | LSCE |
| Candle Lake | Canada | CDL | EC |
| Cape Ferguson | Australia | CFA | CSIRO |
| Cape Grim | Australia | CGO | AGAGE |
| Cape Grim | Australia | CGO | NOAA/ESRL |
| Cape Kumukahi | United States of America | KUM | NOAA/ESRL |
| Cape Meares | United States of America | CMO | NOAA/ESRL |
| Cape Ochi-ishi | Japan | COI | NIES |
| Cape Point | South Africa | CPT | SAWS |
| Cape Rama | India | CRI | CSIRO |
| Casey Station | Australia | CYA | CSIRO |
| Chibougamau | Canada | CHM | EC |
| Christmas Island | Kiribati | CHR | NOAA/ESRL |
| Cold Bay | United States of America | CBA | NOAA/ESRL |
| Crozet | France | CRZ | NOAA/ESRL |
| Deuselbach | Germany | DEU | UBA |
| Dwejra Point | Malta | GOZ | NOAA/ESRL |
| East Trout Lake | Canada | ETL | EC |
| Easter Island | Chile | EIC | NOAA/ESRL |
| Egbert | Canada | EGB | EC |
| Estevan Point | Canada | ESP | CSIRO |
| Estevan Point | Canada | ESP | EC |
| Fraserdale | Canada | FSD | EC |
| Gobabeb | Namibia | NMB | NOAA/ESRL |
| Gosan | Republic of Korea | GSN | NIER |
| Grifton | United States of America | ITN | NOAA/ESRL |
| Guam | United States of America | GMI | NOAA/ESRL |
| Halley Bay | United Kingdom of Great Britain and Northern Ireland | HBA | NOAA/ESRL |
| Hateruma | Japan | HAT | NIES |
| Hegyhatsal | Hungary | HUN | NOAA/ESRL |
| Heimaey | Iceland | ICE | NOAA/ESRL |
| Hohenpeissenberg | Germany | HPB | NOAA/ESRL |
| Izaña (Tenerife) | Spain | IZO | AEMET |
| Jungfraujoch | Switzerland | JFJ | Empa |
| Key Biscayne | United States of America | KEY | NOAA/ESRL |
| Lac La Biche (Alberta) | Canada | LLB | EC |
| Lampedusa | Italy | LMP | ENEA |
| Lampedusa | Italy | LMP | NOAA/ESRL |
| Lulin | China | LLN | NOAA/ESRL |
| Mace Head | Ireland | MHD | AGAGE |
| Mace Head | Ireland | MHD | NOAA/ESRL |
| Macquarie Island | Australia | MQA | CSIRO |
| Mahe Island | Seychelles | SEY | NOAA/ESRL |
| Mauna Loa | United States of America | MLO | NOAA/ESRL |
| Mawson | Australia | MAA | CSIRO |
| McMurdo Station | United States of America | MCM | NOAA/ESRL |
| Mex High Altitude Global Climate Observation Center, Mexico | Mexico | MEX | NOAA/ESRL |
| Minamitorishima | Japan | MNM | JMA |
| Moody | United States of America | WKT | NOAA/ESRL |
| Mould Bay | Canada | MBC | NOAA/ESRL |
| Mt. Kenya | Kenya | MKN | NOAA/ESRL |
| Mt. Waliguan | China | WLG | CMA NOAA/ESRL |
| Natal | Brazil | NAT | NOAA/ESRL |
| Neuglobsow | Germany | NGL | UBA |
| Niwot Ridge (T-van) | United States of America | NWR | NOAA/ESRL |
| Ocean Station "M" | Norway | STM | NOAA/ESRL |
| Ochsenkopf | Germany | OXK | NOAA/ESRL |
| Olympic Peninsula | United States of America | OPW | NOAA/ESRL |
| Pacific Ocean (00N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (05N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (05S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (10N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (10S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (15N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (15S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (20N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (20S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (25N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (25S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (30N) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (30S) | N/A | POC | NOAA/ESRL |
| Pacific Ocean (35S) | N/A | POC | NOAA/ESRL |
| Pallas-Sammaltunturi | Finland | PAL | NOAA/ESRL |
| Palmer Station | United States of America | PSA | NOAA/ESRL |
| Park Falls | United States of America | LEF | NOAA/ESRL |
| Pha Din | Viet Nam | PDI | NHMS Empa |
| Plateau Assy | Kazakhstan | KZM | NOAA/ESRL |
| Plateau Rosa | Italy | PRS | RSE |
| Point Arena | United States of America | PTA | NOAA/ESRL |
| Puy de Dome | France | PUY | LSCE |
| Ragged Point | Barbados | RPB | AGAGE |
| Ragged Point | Barbados | RPB | NOAA/ESRL |
| Ryori | Japan | RYO | JMA |
| Sable Island | Canada | WSA | EC |
| Sand Island | United States of America | MID | NOAA/ESRL |
| Sary Taukum | Kazakhstan | KZD | NOAA/ESRL |
| Schauinsland | Germany | SSL | UBA |
| Sede Boker | Israel | WIS | NOAA/ESRL |
| Shangdianzi | China | SDZ | CMA NOAA/ESRL |
| Shemya Island | United States of America | SHM | NOAA/ESRL |
| Shetland | United Kingdom of Great Britain and Northern Ireland | SIS | CSIRO |
| South China Sea (03N) | N/A | SCS | NOAA/ESRL |
| South China Sea (06N) | N/A | SCS | NOAA/ESRL |
| South China Sea (09N) | N/A | SCS | NOAA/ESRL |
| South China Sea (12N) | N/A | SCS | NOAA/ESRL |
| South China Sea (15N) | N/A | SCS | NOAA/ESRL |
| South China Sea (18N) | N/A | SCS | NOAA/ESRL |
| South China Sea (21N) | N/A | SCS | NOAA/ESRL |
| South Pole | United States of America | SPO | NOAA/ESRL |
| Southern Great Plains | United States of America | SGP | NOAA/ESRL |
| St. Croix | United States of America | AVI | NOAA/ESRL |
| St. David's Head | United Kingdom of Great Britain and Northern Ireland | BME | NOAA/ESRL |
| Summit | Denmark | SUM | NOAA/ESRL |
| Syowa Station | Japan | SYO | NOAA/ESRL |
| Tae-ahn Peninsula | Republic of Korea | TAP | NOAA/ESRL |
| Terceira Island | Portugal | AZR | NOAA/ESRL |
| Teriberka | Russian Federation | TER | MGO |
| Tiksi | Russian Federation | TIK | MGO |
| Tiksi | Russian Federation | TIK | NOAA/ESRL |
| Trinidad Head | United States of America | THD | AGAGE |
| Trinidad Head | United States of America | THD | NOAA/ESRL |
| Tsukuba | Japan | TKB | MRI |
| Tudor Hill | United Kingdom of Great Britain and Northern Ireland | BMW | NOAA/ESRL |
| Tutuila (Cape Matatula) | United States of America | SMO | AGAGE |
| Tutuila (Cape Matatula) | United States of America | SMO | NOAA/ESRL |
| Ulaan Uul | Mongolia | UUM | NOAA/ESRL |
| Ushuaia | Argentina | USH | NOAA/ESRL |
| Wendover | United States of America | UTA | NOAA/ESRL |
| Yonagunijima | Japan | YON | JMA |
| Zeppelinfjellet (Ny-Alesund) | Norway | ZEP | NOAA/ESRL |
| Zingst | Germany | ZGT | UBA |
| Zugspitze / Schneefernerhaus | Germany | ZSF | UBA |
| Zugspitze | Germany | ZUG | UBA |
| Station Name | Country/Territory | GAW ID | Contributor |
|---|---|---|---|
| Adrigole | Ireland | ADR | AGAGE |
| Alert | Canada | ALT | CSIRO |
| Alert | Canada | ALT | NOAA/ESRL |
| Barrow | United States of America | BRW | NOAA/ESRL |
| Cape Ferguson | Australia | CFA | CSIRO |
| Cape Grim | Australia | CGO | AGAGE |
| Cape Grim | Australia | CGO | CSIRO |
| Cape Kumukahi | United States of America | KUM | NOAA/ESRL |
| Cape Meares | United States of America | CMO | AGAGE |
| Cape Ochi-ishi | Japan | COI | NIES |
| Cape Point | South Africa | CPT | SAWS |
| Cape Rama | India | CRI | CSIRO |
| Casey Station | Australia | CYA | CSIRO |
| Estevan Point | Canada | ESP | CSIRO |
| Grifton | United States of America | ITN | NOAA/ESRL |
| Harvard Forest | United States of America | HFM | NOAA/ESRL |
| Hateruma | Japan | HAT | NIES |
| Izaña (Tenerife) | Spain | IZO | AEMET |
| Jungfraujoch | Switzerland | JFJ | Empa |
| Mace Head | Ireland | MHD | AGAGE |
| Macquarie Island | Australia | MQA | CSIRO |
| Mauna Loa | United States of America | MLO | CSIRO |
| Mauna Loa | United States of America | MLO | NOAA/ESRL |
| Mawson | Australia | MAA | CSIRO |
| Monte Cimone | Italy | CMN | UNIURB |
| Niwot Ridge (C-1) | United States of America | NWR | NOAA/ESRL |
| Palmer Station | United States of America | PSA | NOAA/ESRL |
| Park Falls | United States of America | LEF | NOAA/ESRL |
| Ragged Point | Barbados | RPB | AGAGE |
| Ryori | Japan | RYO | JMA |
| Shetland | United Kingdom of Great Britain and Northern Ireland | SIS | CSIRO |
| South Pole | United States of America | SPO | NOAA/ESRL |
| Summit | Denmark | SUM | NOAA/ESRL |
| Trinidad Head | United States of America | THD | AGAGE |
| Tutuila (Cape Matatula) | United States of America | SMO | AGAGE |
| Tutuila (Cape Matatula) | United States of America | SMO | NOAA/ESRL |
| Zugspitze / Schneefernerhaus | Germany | ZSF | UBA |
| Station Name | Country/Territory | GAW ID | Contributor |
|---|---|---|---|
| Alert | Canada | ALT | NOAA/ESRL |
| Barrow | United States of America | BRW | NOAA/ESRL |
| Cape Grim | Australia | CGO | AGAGE |
| Cape Grim | Australia | CGO | NOAA/ESRL |
| Cape Kumukahi | United States of America | KUM | NOAA/ESRL |
| Gosan | Republic of Korea | GSN | AGAGE |
| Grifton | United States of America | ITN | NOAA/ESRL |
| Izaña (Tenerife) | Spain | IZO | AEMET |
| Jungfraujoch | Switzerland | JFJ | AGAGE |
| Jungfraujoch | Switzerland | JFJ | Empa |
| Lampedusa | Italy | LMP | ENEA |
| Mace Head | Ireland | MHD | AGAGE |
| Mace Head | Ireland | MHD | NOAA/ESRL |
| Mauna Loa | United States of America | MLO | NOAA/ESRL |
| Monte Cimone | Italy | CMN | UNIURB |
| Niwot Ridge (C-1) | United States of America | NWR | NOAA/ESRL |
| Palmer Station | United States of America | PSA | NOAA/ESRL |
| Park Falls | United States of America | LEF | NOAA/ESRL |
| Ragged Point | Barbados | RPB | AGAGE |
| Schauinsland | Germany | SSL | UBA |
| South Pole | United States of America | SPO | NOAA/ESRL |
| Summit | Denmark | SUM | NOAA/ESRL |
| Trinidad Head | United States of America | THD | AGAGE |
| Trinidad Head | United States of America | THD | NOAA/ESRL |
| Tutuila (Cape Matatula) | United States of America | SMO | NOAA/ESRL |
| Ushuaia | Argentina | USH | NOAA/ESRL |
| Zeppelinfjellet (Ny-Alesund) | Norway | ZEP | AGAGE |
| Zugspitze / Schneefernerhaus | Germany | ZSF | UBA |
| Station Name | Country/Territory | GAW ID | Contributor |
|---|---|---|---|
| Adrigole | Ireland | ADR | AGAGE |
| Alert | Canada | ALT | NOAA/ESRL |
| Barrow | United States of America | BRW | NOAA/ESRL |
| Cape Grim | Australia | CGO | AGAGE |
| Cape Kumukahi | United States of America | KUM | NOAA/ESRL |
| Cape Meares | United States of America | CMO | AGAGE |
| Gosan | Republic of Korea | GSN | AGAGE |
| Gosan | Republic of Korea | GSN | NIMR |
| Grifton | United States of America | ITN | NOAA/ESRL |
| Harvard Forest | United States of America | HFM | NOAA/ESRL |
| Jungfraujoch | Switzerland | JFJ | AGAGE |
| Lampedusa | Italy | LMP | ENEA |
| Mace Head | Ireland | MHD | AGAGE |
| Mauna Loa | United States of America | MLO | NOAA/ESRL |
| Monte Cimone | Italy | CMN | AGAGE |
| Niwot Ridge (C-1) | United States of America | NWR | NOAA/ESRL |
| Palmer Station | United States of America | PSA | NOAA/ESRL |
| Park Falls | United States of America | LEF | NOAA/ESRL |
| Ragged Point | Barbados | RPB | AGAGE |
| Ryori | Japan | RYO | JMA |
| South Pole | United States of America | SPO | NOAA/ESRL |
| Summit | Denmark | SUM | NOAA/ESRL |
| Trinidad Head | United States of America | THD | AGAGE |
| Trinidad Head | United States of America | THD | NOAA/ESRL |
| Tutuila (Cape Matatula) | United States of America | SMO | AGAGE |
| Tutuila (Cape Matatula) | United States of America | SMO | NOAA/ESRL |
| Ushuaia | Argentina | USH | NOAA/ESRL |
| Zeppelinfjellet (Ny-Alesund) | Norway | ZEP | AGAGE |
| Zeppelinfjellet (Ny-Alesund) | Norway | ZEP | NILU |