NOAA CO₂ Monthly Averages
Select a site to view monthly mean CO₂ concentrations from NOAA GML.
See all available sites
Sites (hold Ctrl/Cmd to select multiple):
Niwot Ridge, Colorado (NWR)
Mauna Loa, Hawaii (MLO)
South Pole, Antarctica (SPO)
Barrow, Alaska (BRW)
Ascension Island, UK (ASC)
Arembepe, Bahia, Brazil (ABP)
Alert, Nunavut, Canada (ALT)
Amsterdam Island, France (AMS)
Anmyeon-do, Republic of Korea (AMY)
Assekrem, Algeria (ASK)
St. Croix, Virgin Islands, United States (AVI)
Terceira Island, Azores, Portugal (AZR)
Baltic Sea, Poland (BAL)
Baring Head Station, New Zealand (BHD)
Bukit Kototabang, Indonesia (BKT)
St. Davids Head, Bermuda, United Kingdom (BME)
Tudor Hill, Bermuda, United Kingdom (BMW)
Black Sea, Constanta, Romania (BSC)
Cold Bay, Alaska, United States (CBA)
Cape Grim, Tasmania, Australia (CGO)
Christmas Island, Republic of Kiribati (CHR)
Centro de Investigacion de la Baja Atmosfera (CIBA), Spain (CIB)
Cape Meares, Oregon, United States (CMO)
Cape Point, South Africa (CPT)
Crozet Island, France (CRZ)
Drake Passage, (DRP)
Dongsha Island, Taiwan (DSI)
Easter Island, Chile (EIC)
Mariana Islands, Guam (GMI)
Dwejra Point, Gozo, Malta (GOZ)
Halley Station, Antarctica, United Kingdom (HBA)
Hohenpeissenberg, Germany (HPB)
Hegyhatsal, Hungary (HUN)
Storhofdi, Vestmannaeyjar, Iceland (ICE)
Izana, Tenerife, Canary Islands, Spain (IZO)
Key Biscayne, Florida, United States (KEY)
Cape Kumukahi, Hawaii, United States (KUM)
Sary Taukum, Kazakhstan (KZD)
Plateau Assy, Kazakhstan (KZM)
Lac La Biche, Alberta, Canada (LLB)
Lulin, Taiwan (LLN)
Lampedusa, Italy (LMP)
Mould Bay, Northwest Territories, Canada (MBC)
High Altitude Global Climate Observation Center, Mexico (MEX)
Mace Head, County Galway, Ireland (MHD)
Sand Island, Midway, United States (MID)
Mt. Kenya, Kenya (MKN)
Farol De Mae Luiza Lighthouse, Brazil (NAT)
Gobabeb, Namibia (NMB)
Olympic Peninsula, Washington, United States (OPW)
Ochsenkopf, Germany (OXK)
Pallas-Sammaltunturi, GAW Station, Finland (PAL)
Pacific Ocean (0 N), (POC000)
Pacific Ocean (5 N), (POCN05)
Pacific Ocean (10 N), (POCN10)
Pacific Ocean (15 N), (POCN15)
Pacific Ocean (20 N), (POCN20)
Pacific Ocean (25 N), (POCN25)
Pacific Ocean (30 N), (POCN30)
Pacific Ocean (5 S), (POCS05)
Pacific Ocean (10 S), (POCS10)
Pacific Ocean (15 S), (POCS15)
Pacific Ocean (20 S), (POCS20)
Pacific Ocean (25 S), (POCS25)
Pacific Ocean (30 S), (POCS30)
Pacific Ocean (35 S), (POCS35)
Palmer Station, Antarctica, United States (PSA)
Point Arena, California, United States (PTA)
Ragged Point, Barbados (RPB)
South China Sea (3 N), (SCSN03)
South China Sea (6 N), (SCSN06)
South China Sea (9 N), (SCSN09)
South China Sea (12 N), (SCSN12)
South China Sea (15 N), (SCSN15)
South China Sea (18 N), (SCSN18)
South China Sea (21 N), (SCSN21)
Shangdianzi, China (SDZ)
Mahe Island, Seychelles (SEY)
Southern Great Plains, Oklahoma, United States (SGP)
Shemya Island, Alaska, United States (SHM)
Tutuila, American Samoa (SMO)
Ocean Station Charlie, United States (STC)
Ocean Station M, Norway (STM)
Summit, Greenland (SUM)
Syowa Station, Antarctica, Japan (SYO)
Tae-ahn Peninsula, Republic of Korea (TAP)
Trinidad Head, California, United States (THD)
Hydrometeorological Observatory of Tiksi, Russia (TIK)
Taiping Island, Taiwan (TPI)
Ushuaia, Argentina (USH)
Wendover, Utah, United States (UTA)
Ulaan Uul, Mongolia (UUM)
Weizmann Institute of Science at the Arava Institute, Ketura, Israel (WIS)
Mt. Waliguan, Peoples Republic of China (WLG)
Ny-Alesund, Svalbard, Norway and Sweden (ZEP)