The Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory (ESRL) in Boulder, CO. The Ozone Water Vapor Group conducts research on the nature and causes of the depletion of the stratospheric ozone layer and the role of stratospheric and tropospheric ozone and water vapor in forcing climate change and in modifying the chemical cleaning capacity of the atmosphere. This is accomplished through long-term observations and intensive field programs that measure ozone and water vapor levels in the upper troposphere and stratosphere. The Reference Network used by the Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory in Boulder, CO. The measurement programs include Total Column Ozone Measurements (Dobson Ozone), Surface Ozone Measurements, Ozonesonde Measurements using balloons, and Water Vapor measurements using balloons. The Dobson Ozone Spectrophotometer has been used to study total ozone since it was developed in the 1920's. Total ozone is the total amount of ozone in a column from the surface to the edge of the atmosphere. The use of the Dobson Ozone Spectrophotometer is important to the global effort to understand the role of stratospheric ozone in atmospheric chemistry, biological and ecological effects of solar UV radiation, climate and weather. ESRL Global Monitoring Division maintains stations around the world that use the Dobson Ozone spectrophotometer. These stations are located in American Samoa, Antarctica, Australia, France, New Zealand, and the United States (Alaska, California, Colorado, Hawaii, Maine, North Dakota, Tennessee, and Virginia). They are also the World Dobson Ozone Calibration Centre, responsible for the calibration of over 100 instruments worldwide.

The Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory (ESRL) in Boulder, CO. The Ozone Water Vapor Group conducts research on the nature and causes of the depletion of the stratospheric ozone layer and the role of stratospheric and tropospheric ozone and water vapor in forcing climate change and in modifying the chemical cleaning capacity of the atmosphere. This is accomplished through long-term observations and intensive field programs that measure ozone and water vapor levels in the upper troposphere and stratosphere. The Reference Network used by the Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory in Boulder, CO. The measurement programs include Total Column Ozone Measurements (Dobson Ozone), Surface Ozone Measurements, Ozonesonde Measurements using balloons, and Water Vapor measurements using balloons. An ozonesonde is a lightweight, balloon-borne instrument that is mated to a conventional meteorological radiosonde. As the balloon ascends through the atmosphere it sends information on ozone and standard meteorological quantities (air temperature, pressure, and relative humidity) back to a ground receiving station. The balloon is able to ascend to altitudes of about 115,000 feet (35 km) in about two hours before it will burst. Ozonesonde are launched approximately weekly from 9 locations including American Samoa, Antarctica, Greenland, Fiji, and the United States (Alabama, California, Colorado, Hawaii, and Rhode Island). The data have been collected since 1967.

The Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory (ESRL) in Boulder, CO. The Ozone Water Vapor Group conducts research on the nature and causes of the depletion of the stratospheric ozone layer and the role of stratospheric and tropospheric ozone and water vapor in forcing climate change and in modifying the chemical cleaning capacity of the atmosphere. This is accomplished through long-term observations and intensive field programs that measure ozone and water vapor levels in the upper troposphere and stratosphere. The Reference Network used by the Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory in Boulder, CO. The measurement programs include Total Column Ozone Measurements (Dobson Ozone), Surface Ozone Measurements, Ozonesonde Measurements using balloons, and Water Vapor measurements using balloons. An ozonesonde is a lightweight, balloon-borne instrument that is mated to a conventional meteorological radiosonde. As the balloon ascends through the atmosphere it sends information on ozone and standard meteorological quantities (air temperature, pressure, and relative humidity) back to a ground receiving station. The balloon is able to ascend to altitudes of about 115,000 feet (35 km) in about two hours before it will burst. Ozonesonde are launched approximately weekly from 9 locations including American Samoa, Antarctica, Greenland, Fiji, and the United States (Alabama, California, Colorado, Hawaii, and Rhode Island). The data have been collected since 1967.

This data set contains continuous UV photometric data of surface level ozone collected at 6m above ground level. Data records consist of UTC time, date, and processed ozone mixing ratio (parts per billion). Data is collected from global locations and is provided in 1 minute and 1 hour averages. Data are archived at the NOAA National Climatic Data Center (NCDC), but are produced and available from NOAA Earth System Research Laboratory (ESRL).

The Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory (ESRL) in Boulder, CO. The Ozone Water Vapor Group conducts research on the nature and causes of the depletion of the stratospheric ozone layer and the role of stratospheric and tropospheric ozone and water vapor in forcing climate change and in modifying the chemical cleaning capacity of the atmosphere. This is accomplished through long-term observations and intensive field programs that measure ozone and water vapor levels in the upper troposphere and stratosphere. The Reference Network used by the Ozone and Water Vapor Group is part of NOAA's Earth System Research Laboratory in Boulder, CO. The measurement programs include Total Column Ozone Measurements (Dobson Ozone), Surface Ozone Measurements, Ozonesonde Measurements using balloons, and Water Vapor measurements using balloons. Since 1980, the Ozone and Water Vapor group has made in situ measurements of atmospheric water vapor mixing ratios (mole fractions) from the lower free troposphere (~2 km) up to the middle stratosphere (~28 km). These measurements are made using a balloon-borne payload including a NOAA frost point hygrometer, an electrochemical concentration cell, ozonesonde, and a radiosonde to measure temperature, pressure, and payload location via GPS. The payloads are built and calibrated in the laboratory in Boulder, CO. These hygrometers are flown monthly from Boulder to Hilo, Hawaii and Lauder, New Zealand. The primary research focus is the long-term monitoring of upper tropospheric and lower stratospheric water vapor and the processes that control its abundance in the atmosphere. Water vapor is a natural and important component of the Earth's atmosphere. The distribution of water vapor influences physical and chemical properties of the atmosphere (weather, clouds, precipitation, radiation balance, convective uplift, lightning generation, and ozone chemistry) as well as its effects on the Earth's energy budget. Variations in the amounts of water vapor in the atmosphere are natural and normal, but changes in its vertical distribution may be indicative of changes in the Earth's climate which is of great interest.

This data set contains continuous UV photometric data of surface level ozone collected at 6m above ground level. Data records consist of UTC time, date, and processed ozone mixing ratio (parts per billion). Data is collected from global locations and is provided in 1 minute and 1 hour averages. The data were produced and are available from the NOAA Earth System Research Laboratory (ESRL) Global Monitoring Laboratory, and the data are archived by the NOAA National Centers for Environmental Information (NCEI).

TL2O3NS_8 is the Tropospheric Emission Spectrometer (TES)/Aura Level 2 Ozone Nadir Special Observation Version 8 data product. TES was an instrument aboard NASA's Aura satellite and was launched from California on July 15, 2004. Data collection for TES is complete. It consisted of information for one molecular species for an entire Global Survey or Special Observation. TES Level 2 data contained retrieved species (or temperature) profiles at the observation targets and the estimated errors. The geolocation, quality and other data (e.g., surface characteristics for nadir observations) were also provided. L2 modeled spectra were evaluated using radiative transfer modeling algorithms. The process, referred to as retrieval, compared observed spectra to the modeled spectra and iteratively updated the atmospheric parameters. L2 standard product files included information for one molecular species (or temperature) for an entire global survey or special observation run. A global survey consisted of a maximum of 16 consecutive orbits. Nadir and limb observations were in separate L2 files, and a single ancillary file was composed of data that are common to both nadir and limb files. A nadir sequence within the TES Global Survey was a fixed number of observations within an orbit for a Global Survey. Prior to April 24, 2005, it consisted of two low resolution scans over the same ground locations. After April 24, 2005, Global Survey data consisted of three low resolution scans. The Nadir standard product consists of four files, where each file is composed of the Global Survey Nadir observations from one of four focal planes for a single orbit, i.e. 72 orbit sequences. The Global Survey Nadir observations only used a single set of filter mix. A Global Survey consists of observations along 16 consecutive orbits at the start of a two day cycle, over which 3,200 retrievals were performed. Each observation was the input for retrievals of species volume mixing ratios (VMRs), temperature profiles, surface temperature and other data parameters with associated pressure levels, precision, total error, vertical resolution, total column density and other diagnostic quantities. Each TES Level 2 standard product reported information in a swath format conforming to the HDF-EOS Aura File Format Guidelines. Each Swath object wa bounded by the number of observations in a global survey and a predefined set of pressure levels representing slices through the atmosphere. Each standard product could have had a variable number of observations depending upon the Global Survey configuration and whether averaging is employed. Also, missing or bad retrievals were not reported. The organization of data within the Swath object was based on a superset of the Upper Atmosphere Research Satellite (UARS) pressure levels that was used to report concentrations of trace atmospheric gases. The reporting grid was the same pressure grid used for modeling. There were 67 reporting levels from 1211.53 hPa, which allowed for very high surface pressure conditions, to 0.1 hPa, about 65 km. In addition, the products reported values directly at the surface when possible or at the observed cloud top level. Thus in the Standard Product files each observation could potentially contain estimates for the concentration of a particular molecule at 67 different pressure levels within the atmosphere. However, for most retrieved profiles, the highest pressure levels were not observed due to a surface at lower pressure or cloud obscuration. For pressure levels corresponding to altitudes below the cloud top or surface, where measurements were not possible, a fill value was applied.To minimize the duplication of information between the individual species standard products, data fields common to each species (such as spacecraft coordinates, emissivity, and other data fields) have been collected into a separate standard product, termed the TES L2 Ancillary Data product (ESDT short name: TL2ANC). Users

This dataset contains in-situ atmospheric ozone mixing ratios observed during SIPEX 2. Ozone Monitor Instrument Description: Commercial dual cell ultraviolet ozone analyser: Thermoelectron Model 49C. Calibration to a traceable ozone standard prior to and after the voyage. Ozone loss in inlet and on filter quantified and negligible. Instrument Setup: This instrument is sampling from its own Teflon sample air inlet secured to the front port side railing of the Monkey Deck. Air samples are drawn through a 30m quarter inch Teflon tube then through an inline particle filter before being entering the instrument located in the Met-Lab. Each week, a 30 minute instrument zero is performed by inserting an inline scrubber which catalyses ozone destruction. In the current position, wind from the aft of the ship will blow ship exhaust over the inlet, causing fluctuating low ozone values. Use the 2D anemometer and mercury measurements made on "Ned Kelly" in the mercury data file to filter for wind direction versus heading, also the mercury data itself is indicative of sampling ship emissions. The files included are in csv format. Files are named as per the date they were created. Data continued to log to the most recent file until data collection stopped. There is a "Long" and a "Normal" file for each set. The "Long" contains instrument parameters logged every hour, and the "Normal" contains minute average ozone concentrations.