The Data Access Portal has information in 3 columns. An outline of the content in these columns is provided above. When first entering the search interface, all potential datasets are listed. Datasets are indicated in the map and results tabulation elements which are located in the middle column. The order of results can be modified using the "Sort by" option in the left column. On top of this column is normally relevant guidance information to user presented as collapsible elements.
If the user want to refine the search, this can be done by constraining the bounding box search. This is done in the map - the listing of datasets is automatically updated. Date constraints can be added in the left column. For these to take effect, the user has to push the button marked search. In the left column it is also possible to specific text elements to search for in the datasets. Again pushing the button marked "Search" is necessary for these to take action. Complex search patterns can be constructed by changing the operators used in the text field and prefixing words with '+' and '-' to indicate whether they have to be present or should not be present in the results.
Other elements indicated in the left and right columns are facet searches, i.e. these are keywords that are found in the datasets and all datasets that contain these specific keywords in the appropriate metadata elements are listed together. Further refinement can be done using full text, date or bounding box constraints. Individuals, organisations and data centres involved in generating or curating the datasets are listed in the facets in the right column.
Citation of data and service
If you use data retrieved through this portal, please acknowledge the efforts of the data portal and the data centres contributing.
The information required to properly cite a dataset is normally provided in the discovery metadata the datasets.
author,
title,
year of publication,
publisher (for data this is often the archive where it is housed),
edition or version,
access information (a URL or persistent identifier, e.g. DOI if provided)
This data set consists of continuous meteorological data, monthly climatological summaries, and upper air meteorological data for the NOAA/CMDL Pt. Barrow Observatory. Data include hourly average observations of air temperature, station pressure, and surface wind direction and speed. The data set also includes atmospheric radiation at the Barrow Observatory. Radiation data consist of hourly-averaged data for downwelling short-wave radiation, in watts per square meter. The radiation data were used to determine the snow disappearance date at Barrow on the basis of objective, radiometric measurements made over open tundra (<a href="http://www.esrl.noaa.gov/gmd/grad/snomelt.html">http://www.esrl.noaa.gov/gmd/grad/snomelt.html</a>).
These data are available from the NOAA Earth System Research Laboratory, <a href="http://www.esrl.noaa.gov/gmd/dv/data/">http://www.esrl.noaa.gov/gmd/dv/data/</a>. Meteorological data are available via FTP at <a href="ftp://aftp.cmdl.noaa.gov/data/meteorology/in-situ/brw/">ftp://aftp.cmdl.noaa.gov/data/meteorology/in-situ/brw/</a>, and radiation data are available at <a href="ftp://aftp.cmdl.noaa.gov/data/radiation/baseline/brw/">ftp://aftp.cmdl.noaa.gov/data/radiation/baseline/brw/</a>.
The Atmospheric Radiation Measurement (ARM) Program's primary objective is to test and improve General Circulation Model (GCM) parameterizations of clouds and their effect on the radiative energy balance. The ARM Program focuses on six research areas: 1) aerosols, 2) clouds, 3) longwave radiation, 4) shortwave radiation, 5) surface energy exchange (or flux), and 6) atmospheric state.
Meteorology data from the North Slope of Alaska/Adjacent Arctic Ocean Cloud and Radiation Testbed (CART) site at Barrow, Alaska include wind speed, wind direction, air temperature, humidity, barometric pressure, visibility, and precipitation for the atmospheric column above the site. Radiation measurements at the site include longwave and shortwave radiation, including infrared and solar radiation. Solar radiation data include total daily solar radiation, direct-beam normal irradiance, downwelling hemispheric diffuse irradiance, and downwelling hemispheric irradiance. Infrared radiation data include radiance spectra ensemble (1800-3020 cm-1 and 520-1800 cm-1), mean radiances for short- and longwave wavenumbers, downwelling hemispheric infrared irradiance, longwave scene radiance spectral averages (AERI Ch1), longwave scene variability spectral averages (AERI Ch1), and net radiation.
Data are available at http://www.archive.arm.gov/armlogin/login.jsp.
The ARM measurements are aggregated together in data files. A data file usually contains a time series of one or more measurements for a known time interval and a single location. Most data are stored in netCDF format. Some data files also contain one or more measurements distributed over a region from a single time (e.g., satellite images); these data are stored in HDF format.