[Keyword='U.S. DEPARTMENT OF AGRICULTURE']
Ozone in the Northeastern United States, 1980-85 & 1987Entry ID: USDA0046
Abstract: This database contains monthly and seasonal ozone records for
1980-85 and 1987, at the state and county levels of aggregation,
for the states in the northeastern U.S. States included:
Connecticut, Delaware, the District of Columbia, Maine,
Maryland, Massachusetts, New Hampshire, New Jersey, New York,
North Carolina, Ohio, Pennsylvania, Rhode Island, Vermont,
Virginia, and West Virginia.
The ... aggregates estimate the magnitude of ozone concentrations
for the state or county, constructed from hourly observations
(parts per billion) taken at monitoring sites located throughout
the region. The hourly observations for each monitoring station
for each month were weighted using a sigmoidal method developed
by Lefohn, et al. ("A Comparison of Indices that Describe the
Relationship Between Exposure to Ozone and Reduction in the
Yield of Agricultural Crops," Atmospheric Environment, Vol. 22,
No. 6, pp. 1229-40, 1988) and summed to give a cumulative
exposure index. The geostatistical spatial smoothing technique
known as kriging was used to interpolate the monitoring station
data to a 40 by 32 block grid of 30 minute by 30 minute blocks
covering the entire region. These blocks were then overlaid on
maps of the state and county boundaries and blocks and portions
of blocks that fell in each state or county were weighted by
land area and averaged over the state or county. The spring,
summer and April-September aggregates were constructed by
summing the monthly estimates for each period.
Collection Organization: Environmental Protection Agency's
Aerometric Information Retrieval System (AIRS).
Collection Methodology: AIRS consists of over 700 monitoring
stations throughout the United States and Cananda. Observations
were made hourly.
Collection Frequency: Data only collected once.
Update Characteristics: No elements updated.
Data Center: Economic Research Service
Dissemination Media: Diskette, Internet gopher, Internet home
File Format: ASCII, Lotus/dBase
Access Instructions: Call NASS at 1-800-999-6779 for historical
series data available on diskette. For historical series data
available online, connect to the Internet home page at Cornell
Access to the data or reports may be achieved through the
ERS-NASS information system:
For subscription direct to an e-mail address, send an e-mail
Type the word "lists" (without quotes) in the body of the
(Click for Interactive Map)
Start Date: 1980-01-01Stop Date: 1987-12-31
ISO Topic Category
Quality Data distributed with this product may include both published
and unpublished statistics in the public domain. Distribution
in this form does not imply U.S. Department of Agriculture
approval of a particular data series or statistic, nor does the
Department attest to their accuracy. Moreover, the Economic
Research Service makes no warranty that data supplied in this
form are either accurate transcriptions from source materials or
appropriate for a particular user purpose.
Role: TECHNICAL CONTACT
Email: dwest at econ.ag.gov
USDA Economic Research Service Natural Resources and Environment Division (NRED) 1301 New York Avenue, NW, Room 532E
Province or State: DC
Postal Code: 20005-4788
Information can be obtained requested from the North Carolina Center for Geographic Analysis and also requested from NOAA.
Creation and Review Dates
DIF Creation Date: 2005-09-12
Last DIF Revision Date: 2005-09-19