Abstract:
ABSTRACT: An aurora involves emitted electromagnetic radiation that results primarily from the interaction of energetic, extra-atmospheric particles with the neutral gases of the upper atmosphere. These emissions extend from the ultraviolet to the infrared. The portion of the emitted electromagnetic radiation that is visible to the human eye is referred to as the visual aurora. One visible aurora ... form, which indicates the occurrence or non-occurrence of auroras without any reference to form or brightness, is known as a visoplot. With geomagnetic latitude as ordinate and universal time as abscissa, various symbols are used to indicate whether, at a certain location, an aurora is observed or is estimated to be overhead, to the north, or to the south. This is done for each of eight 45 degree geomagnetic longitude sectors. Magnetic activity index values, KP, are given for 3-hour periods. Northern and southern hemisphere visoplots for the IGY period are contained in volume 29 of the annals of the International Geophysical Year. Another form that shows the auroral geometry and the geomagnetic latitude and longitude of a display at each hour of universal time is the synoptic auroral map on polar projection. By use of various symbols, these maps show the location of veils, patches, arcs. rays and bands. Also given is the value of KP for that particular time. These maps are available on microfilm from the National Geophysical Data Center or World Data Center A, Boulder, for certain time periods. Northern hemisphere maps are available for 1964, 1965, 1967 and 1968. Southern hemisphere maps can be obtained for the years 1964 and 1965. A similar form for displaying auroral data from the US and Canada is the North American map. This type of map is not on polar projection, but it does indicate the locations and forms of observed aurora. A large number of these maps are held at NGDC Boulder and the available time periods can be obtained upon inquiry. "Observers' reports are also available in digital form.Aurora is electromagnetic radiation emitted primarily from the interaction of energetic, extra-atmospheric particles with the neutral gases of the upper atmosphere. These emissions extend from the ultraviolet to the infrared. The portion of the emitted electromagnetic radiation that is visible to the human eye is referred to as the visual aurora. The visible aurora are due primarily to the interaction of energetic particles with the oxygen and nitrogen gases of the upper atmosphere. The important emissions in the visible region are the discrete green (5577A) and red (6300-6364A) lines of atomic oxygen and the molecular bands of ionized molecular nitrogen in the blue and neutral molecular nitrogen in the red regions of the spectrum.
SUPPLEMENTAL INFORMATION: This archive includes data from:Inventory of Aurorae data -- pages from Report UAG-30 Catalogue of Data on Solar-Terrestrial PhysicsTable of Contents -- Report UAG-28 Collected Data Reports on Aug 1972 Solar-Terrestrial EventsSolar Activity, Aurorae and Climate in Central Europe in the last 1000 Years by L. Krivsky and K. Pejml (1988) and "Supplement of the Catalogue of Polar Aurorae less than 55N in the Period 1000-1900"
CURRENTNESS REFERENCE: Ground Condition
DATA SET CREATORS: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (comp.)WDC/STP, BOULDER > World Data Center for Solar-Terrestrial Physics, Boulder
FEES: Free download $25.00 plus handling and shipping outside the USA $25.00 plus handling and shipping outside the USA
Purpose:
PURPOSE: To provide long-term scientific data stewardship for the Nation's geophysical data, ensuring quality, integrity, and accessibility.
Description:
Home page where data may be downloaded from
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
N: 90.0
S: -90.0
E: 180.0
W: -180.0
Data Set Citation
Dataset Originator/Creator:
Center for International Earth Science Information Network (CIESIN)/Columbia University, and Centro Internacional de Agricultura Tropical (CIAT)
Dataset Title:
Gridded Population of the World, Version 3 (GPWv3): Centroids
Dataset Release Date:
200512
Dataset Release Place:
Palisades, NY
Dataset Publisher:
NASA Socioeconomic Data and Applications Center (SEDAC)
Quality
Quality assurance/quality control included interlaboratory comparisons between the Ecology/EPA Manchester laboratory and California Analytical Laboratories (CAL), analysis of matrix spikes and matrix spike duplicates, duplicate samples, and analysis of standard reference materials. CAL was the contract laboratory responsible ... for the fish tissue organochlorine analyses. The Ecology/EPA Manchester laboratory was responsible for the sediment organochlorine and mercury analyses and fish tissue mercury analyses. Data provided by CAL were reviewed by the Manchester laboratory.
The laboratory data were reviewed and data qualifiers were added as appropriate. The data qualifiers used were defined as follows:
J-Estimated concentration. U-Not detected. Value is the detection limit.
In general, sediment samples were collected in the vicinity of suspected sources of DDT. All data entered in the database were reviewed for data entry errors. All detected errors were corrected.
NASA Goddard Space Flight Center
Global Change Master Directory
City:
Greenbelt
Province or State:
MD
Postal Code:
20771
Country:
USA
Publications/References
Johnson, A., D. Norton, and W. Yake. 1986. Occurrence and significance of DDT compounds and other contaminants in fish, water and sediment from the Yakima River Basin. Washington State Department of Ecology, Olympia, WA.
Johnson, A., D. Norton, and B. Yake. 1988. Persistence of DDT in the Yakima River drainage, Washington. Arch. Environ. Contam. Toxicol. 17:289-297.
