Welcome to the NOAA/ESRL/GMD - Ozone and Water Vapor Group (OZWV) Total Ozone home page.

Dobson data is available at the Dobson FTP Data Archive

The Dobson Ozone Spectrophotometer has been used to study total ozone since its development in the 1920's. The observations of total ozone, the total amount of ozone in a column from the surface to the edge of the atmosphere, by this instrument is one of the longest geophysical measurements series (at Arosa, Switzerland) in existence.

Dobson spectrophotometer.
Click to view full size image

Today, the instrument is an important part of a global effort to understand the role of stratospheric ozone in atmospheric chemistry, biological and ecological effects of solar UV radiation, climate and weather. ESRL/GMD maintains 15 stations which use the Dobson Ozone spectrophotometer, and is the World Dobson Ozone Calibration Centre under the Global Atmosphere Watch, responsible for the calibration of the 100+ instruments worldwide.

Operations Handbook - Ozone Observations with a Dobson Spectrophotometer

GMD Dobson observation sites

Code Name Country Latitude Longitude Elevation
Data File Data Plots
BIS Bismarck, North Dakota United States 46.772 -100.760 511.0 Data File Data Plots
BDR (bld) Boulder, Colorado United States 39.991 -105.261 1628.0 Data File Data Plots
BNA Nashville, Tennessee United States 36.247 -86.562 182.0 Data File Data Plots
BRW Barrow, Alaska United States 71.323 -156.611 11.0 Data File Data Plots
CAR (cbm) Caribou, Maine United States 46.868 -68.013 191.0 Data File Data Plots
FBK Fairbanks, Alaska United States 64.860 -147.850 133.0 Data File Data Plots
HNX Hanford, California United States 36.314 -119.632 73.0 Data File Data Plots
HUA Huancayo Peru -12.050 -75.320 4500.0 Data Plots
LDR Lauder New Zealand -45.040 169.680 370.0 Data File Data Plots
MLO Mauna Loa, Hawaii United States 19.536 -155.576 3397.0 Data File Data Plots
MPO Maracompoche Peru -11.400 -76.320 4500.0 Data Plots
OHP Haute Provence France 43.917 5.750 580.0 Data File Data Plots
PTH Perth Australia -31.917 115.967 5.0 Data File Data Plots
SMO Tutuila American Samoa -14.247 -170.564 42.0 Data File Data Plots
SPO South Pole, Antarctica United States -89.980 -24.800 2810.0 Data File Data Plots
TAL Tallahassee, Florida United States 30.430 -84.330 53.0 Data Plots
WAI Wallops Island, Virginia United States 37.860 -75.510 13.0 Data File Data Plots