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GOZCARDS
Global OZone Chemistry And Related trace gas Data records for the Stratosphere

Data Information


Oct. 2019 Update: Besides the original (version 1.01) data (through year 2012), updated files (through year 2018) have been provided for ozone (version 2.20). Files for additional years will be provided on a yearly basis, as long as the data are deemed useful for scientific investigations. Some comments/caveats will be provided in the updated “README” document for data users (e.g., depending on the species and time period). See Froidevaux et al. (2015) for an overview of the original GOZCARDS data sets, and Froidevaux et al. (2019) for information on version 2.20 ozone, also used by others in the literature (e.g., see the WMO Ozone Assessment Report, 2018, and references therein).

Caveats and future plans: There have been no GOZCARDS data updates, so far, using the more recent (version 4) ACE-FTS (Atmospheric Chemistry Experiment-Fourier Transform Spectrometer) data sets. This is best done after a careful evaluation of long-term drifts in either MLS or ACE-FTS data, and the relative drifts between these two sets of time series. For some species (H2O, and maybe N2O), GOZCARDS updates would best be produced after MLS version 5 data are reprocessed, in order to account for at least part of the MLS-related drifts for these species (see, e.g., Froidevaux et al., 2019).

Data for the MEaSURES GOZCARDS project are hosted by the Goddard Earth Science Data and Information Services Center (GES-DISC). This MEaSUREs GOZCARDS Earth System Data Record (ESDR) consists of products generated with a focus on stratospheric ozone and related chemical species. The products include zonal average time series derived from "Level 2" products based primarily on measurements from satellite-borne instruments, and largely from NASA missions studying the Earth's stratosphere since the late 1970s. The merged dataset (time series in various latitude/pressure bins) follow the source datasets being merged together, after adjustments for a combination of the offsets that mitigate data discontinuities (average biases) between the different instruments' measurements. Data users should make sure they are familiar with the README Document for the Global OZone Chemistry And Related trace gas Data records for the Stratosphere (GOZCARDS) project before attempting to use the data.

To the right, the Data Sources Table summarizes the GOZCARDS products (stratospheric species name or temperature (T)), and source datasets. The products' files generally include source datasets (individual instrument records) as well as merged datasets, based on a combination of instruments. The product types in the GOZCARDS files are species Volume Mixing Ratio (VMR) or T time series on a latitude/pressure grid (10° monthly zonal averages). Note that the 10° latitude bins have centers at 85S, 75S, ...75N, 85N. Also, the pressure grid is based on pressure = 1000 (hPa) x 10(-n/6) with n = 0,1,2... and maximum coverage being from 1000 to 0.01 hPa. Refer to the Data Sources Table for recommended pressure ranges for individual GOZCARDS datasets.

Also the chart at the bottom right provides a timeline of satellite missions and instruments considered for the GOZCARDS project and the creation of a stratospheric composition ESDR. Dotted lines indicate some degradation in coverage during the ending phase of some missions (SAGE II, UARS MLS); HALOE also suffered from poorer coverage in the second half of the UARS mission.
Data Sourcesproducts


Data Timelinetimeline

References


  • Froidevaux, L., Anderson, J., Wang, H.-J., Fuller, R. A., Schwartz, M. J., Santee, M. L., Livesey, N. J., Pumphrey, H. C., Bernath, P. F., Russell, III, J. M., and McCormick, M. P.: Global OZone Chemistry And Related trace gas Data records for the Stratosphere (GOZCARDS): methodology and sample results with a focus on HCl, H2O, and O3, Atmos. Chem. Phys., 15, 10,471–10,507, doi:10.5194/acp-15-10471-2015, 2015.
  • Froidevaux, L., Kinnison, D. E., Wang, R., Anderson, J., and Fuller, R. A.: Evaluation of CESM1 (WACCM) free-running and specified-dynamics atmospheric composition simulations using global multispecies satellite data records, Atmos. Chem. Phys., 19, 4783–4821, doi:10.5194/acp-19-4783-2019, 2019.
  • WMO (World Meteorological Organization): Scientific Assessment of Ozone Depletion: 2018, Global Ozone Research and Monitoring Project–Report No. 58, World Meteorological Organization, Geneva, Switzerland, 2018.



Data Products



GOZCARDS Monthly Source Data Products
Short Name Long Name Status
GozSmlpHCl GOZCARDS Source Data for Hydrogen Chloride Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozSmlpH2O GOZCARDS Source Data for Water Vapor Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozSmlpO3 GOZCARDS Source Data for Ozone Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozSmlpHNO3 GOZCARDS Source Data for Nitric Acid Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozSmlpN2O GOZCARDS Source Data for Nitrous Oxide Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozSmlpT GOZCARDS Source Data for Temperature Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available



GOZCARDS Monthly Merged Data Products
Short Name Long Name Status
GozMmlpHCl GOZCARDS Merged Data for Hydrogen Chloride Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozMmlpH2O GOZCARDS Merged Data for Water Vapor Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozMmlpO3 GOZCARDS Merged Data for Ozone Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozMmlpHNO3 GOZCARDS Merged Data for Nitric Acid Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available
GozMmlpN2O GOZCARDS Merged Data for Nitrous Oxide Monthly Zonal Averages on a Geodetic Latitude and Pressure Grid Available



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