NWS Daily Climatology Data: 1982 (SNF) Data Set Guide Document
Summary:
Weather data were collected by the National Weather Service in
International Falls, Minnesota. International Falls is about 80 miles
from the SNF, but the weather data is representative of the area.
Total solar insolation measurements were made at Fall Lake Dam in
Winton, Minn. by Prof. Donald Baker of the Department of Soil Science
at the University of Minnesota, St. Paul. Insolation values were
measured using a Yellow Springs solar cell calibrated against an
Eppley Pyranometer.
Table of Contents:
1. Data Set Overview
2. Investigator(s)
3. Theory of Measurements
4. Equipment
5. Data Acquisition Methods
6. Observations
7. Data Description
8. Data Organization
9. Data Manipulations
10. Errors
11. Notes
12. Application of the Data Set
13. Future Modifications and Plans
14. Software
15. Data Access
16. Output Products and Availability
17. References
18. Glossary of Terms
19. List of Acronyms
20. Document Information
1. Data Set Overview:
Data Set Identification:
NWS Daily Climatology Data: 1982 (SNF).
Data Set Introduction:
Weather data were collected by the National Weather Service in
International Falls, Minnesota. International Falls is about 80 miles
from the SNF, but the weather data is representative of the area.
Total solar insolation measurements were made at Fall Lake Dam in
Winton, Minn. by Prof. Donald Baker of the Department of Soil Science
at the University of Minnesota, St. Paul. Insolation values were
measured using a Yellow Springs solar cell calibrated against an
Eppley Pyranometer.
Objective/Purpose:
Not available.
Summary of Parameters:
Daily temperature (minimum, maximum, average), precipitation,
insolation.
Discussion:
Daily weather data for the years 1972 through 1990 are stored in a
collection of data sets with each data set containing one year's data,
plus a data set including the entire data collection. The data set
names are in the form:
NWS Daily Climatology Data: 1972 (SNF)
NWS Daily Climatology Data: 1973 (SNF)
NWS Daily Climatology Data: 1974 (SNF)
NWS Daily Climatology Data: 1975 (SNF)
NWS Daily Climatology Data: 1976 (SNF)
NWS Daily Climatology Data: 1977 (SNF)
NWS Daily Climatology Data: 1978 (SNF)
NWS Daily Climatology Data: 1979 (SNF)
NWS Daily Climatology Data: 1980 (SNF)
NWS Daily Climatology Data: 1981 (SNF)
NWS Daily Climatology Data: 1982 (SNF)
NWS Daily Climatology Data: 1983 (SNF)
NWS Daily Climatology Data: 1984 (SNF)
NWS Daily Climatology Data: 1985 (SNF)
NWS Daily Climatology Data: 1986 (SNF)
NWS Daily Climatology Data: 1987 (SNF)
NWS Daily Climatology Data: 1988 (SNF)
NWS Daily Climatology Data: 1989 (SNF)
NWS Daily Climatology Data: 1990 (SNF)
and
NWS Daily Climatology Data: 1972-1990 (the entire data
collection).
Related Data Sets:
Not available.
2. Investigator(s):
Investigator(s) Name and Title:
Dr. Forrest G. Hall
NASA Goddard Space Flight Center
Dr. K. Fred Huemmrich
NASA Goddard Space Flight Center
Dr. Donald E. Strebel
Versar, Inc.
Dr. Scott J. Goetz
University of Maryland
Ms. Jamie E. Nickeson
NASA Goddard Space Flight Center
Ms. K.D. Woods
NASA Goddard Space Flight Center
Dr. Celeste Jarvis
NASA Headquarters
Title of Investigation:
Biophysical, Morphological, Canopy Optical Property, and Productivity
Data on the Superior National Forest.
Contact Information:
Dr. Forrest G. Hall
NASA Goddard Space Flight Center
Code 923
Greenbelt, Maryland 20771
USA
Fax +1 (301) 286-0239
Telephone +1 (301) 286-2974
Email: fghall@ltpmail.gsfc.nasa.gov
3. Theory of Measurements:
Not available.
4. Equipment:
Sensor/Instrument Description:
Collection Environment:
Ground-based.
Source/Platform:
Meteorological Station.
Source/Platform Mission Objectives:
Not available.
Key Variables:
Daily temperature (minimum, maximum, average), precipitation,
insolation.
Principles of Operation:
Not available.
Sensor/Instrument Measurement Geometry:
Not available.
Manufacturer of Sensor/Instrument:
Not available.
Calibration:
Not available.
5. Data Acquisition Methods:
Not available.
6. Observations:
Data/Field Notes:
Not available.
7. Data Description:
Spatial Characteristics:
Weather data were collected by the National Weather Service in
International Falls, Minnesota. International Falls is about 80 miles
from the SNF, but the weather data is representative of the area.
Temporal Characteristics:
This data set contains meteorological data collected during 1982.
Data Characteristics:
__________________________________________________________________________
Variable Name/ Long Name SAS Type Generic Type
Description
__________________________________________________________________________
1 location LOCATION $ 24 CHAR(20)
"Location of Recording Station"
__________________________________________________________________________
2 obs_datc OBS_DATE $ 12 DATE
"The date of the observations,
in the format (DD-MMM-YY)
(eg. 01-jan-90)"
__________________________________________________________________________
3 temp_min MIN_TEMP 8 NUMBER(6,1)
"Daily minimum temperature (F)"
__________________________________________________________________________
4 temp_max MAX_TEMP 8 NUMBER(6,1)
"Daily maximum temperature (F)"
__________________________________________________________________________
5 temp_avg AVG_TEMP 8 NUMBER(6,1)
"Daily average temperature (F)"
__________________________________________________________________________
6 precip PRECIP 8 NUMBER(7,2)
"Precipitation: total daily water
equivalent (inches)"
__________________________________________________________________________
7 gdd GDD 8 NUMBER(5,0)
"Growing (heating) degree days
accumulated for that day
calculated from the sine wave
method. A base value of 40 degrees
(F) was used."
__________________________________________________________________________
8 t_solar TOTAL_SOLAR 8 NUMBER(5,1)
"Total daily solar irradiance
(Langleys) recorded by a Yellow-
Springs solar cell at Winton,
Minnesota"
__________________________________________________________________________
9 rel_hum REL_HUM 8 NUMBER(6,1)
"Relative humidity (%) as measured
daily at 1400 local time"
__________________________________________________________________________
Sample Data Record:
location obs_datc temp_min temp_max temp_avg precip
gdd
t_solar rel_hum
__________________________________________________________________________
"Fall Lake Dam, MN" "01-JAN-82" . . . .
.
65.7 .
"Fall Lake Dam, MN" "02-JAN-82" . . . .
.
18 .
"Fall Lake Dam, MN" "03-JAN-82" . . . .
.
64.1 .
"Fall Lake Dam, MN" "04-JAN-82" . . . .
.
33 .
"Fall Lake Dam, MN" "05-JAN-82" . . . .
.
36.4 .
"Fall Lake Dam, MN" "06-JAN-82" . . . .
.
145.1 .
"Fall Lake Dam, MN" "07-JAN-82" . . . .
.
154.5 .
"Fall Lake Dam, MN" "08-JAN-82" . . . .
.
74.7 .
"Fall Lake Dam, MN" "09-JAN-82" . . . .
.
87.9 .
"Fall Lake Dam, MN" "10-JAN-82" . . . .
.
85.1 .
__________________________________________________________________________
Footnote:
For presentation in this document, some padding blanks may have been
eliminated between columns in the Sample Data Record. Due to the
many fields in this data file, these columns will wrap while
viewing. The actual data files, however, are column delimited with
an adequate record length to prevent wrapping. See the Data Format
Section for conventions used for missing data values in the data
file.
8. Data Organization:
Data are sorted by observation date (obs_datc) and location
(location). Key fields in each record are location and obs_datc.
Data Granularity:
Each data set consists of a single ASCII file containing climatology
data for each location for an entire year, except in the case of "NWS
Daily Climatology Data: 1972-1990" which contains the climatology data
for the entire period 1972-1990.
A general description of data granularity as it applies to the IMS
appears in the EOSDIS Glossary.
Data Format:
The data files associated with this data set consist of numeric and
character fields of varying lengths aligned in columns. The first row
of each data file contains the 8 character SAS variable name that
links to the data format definition file. Character fields are
enclosed in double quotes and numeric fields are listed without
quotes.
Missing data values can be of two varieties:
1. Values that were identified as missing in the original data files.
Missing numeric values of this type are identified in these data
as -999.
2. Those holes that were created as a result of combining files that
contained a slightly different variable set. Missing values of
this type are identified in these data files as empty double
quotes for character fields and a single period, '.' for numeric
fields.
9. Data Manipulations:
Not available.
10. Errors:
Sources of Error:
Not available.
Quality Assessment:
Data Validation by Source:
Not available.
Confidence Level/Accuracy Judgment:
Not available.
Measurement Error for Parameters:
Not available.
Additional Quality Assessments:
Not available.
Data Verification by Data Center:
The Superior National Forest data was received from the Goddard Space
Flight Center in three media:
* As data dumps from the original Oracle SNF database maintained by
GSFC, transferred electronically from the GSFC system to the ORNL
system;
* As ASCII files that mirrored the tables published in the Tech
Memo; and
* As hard copy (Tech Memo).
Data from both electronic sources were input into SAS by ORNL DAAC
data management staff and compared using computer code developed to
process the SNF data. In many cases, the data values from both sources
were found to be identical. In some cases, however, differences were
identified and the providers of the data were consulted to resolve
inconsistencies.
Additionally, some variable columns were available in one source, but
not the other for various reasons. For example, some calculated
variables/columns were provided in the ASCII files (reflecting the
Tech Memo tables) that were not stored in the Oracle database for
purposes of space conservation.
For similar reasons, coded values were used for many of the site and
species identifier variables. A separate reference table was provided
to link the coded variable with its definition, e.g., the SPECIES_REF
file and the SITE_REF file.
The database produced by the ORNL DAAC is a hybrid product that is a
composite of data and information extracted from all three source
media. In data sets where coded variables were included, the code
definition variables have been added to improve usability of the data
set as a stand-alone product.
Therefore the ASCII files that are available through the ORNL DAAC
on-line search and order systems are output from a data set that is a
product of the essential core of numeric data provided by the data
source (GSFC), augmented with additional descriptive information
provided by GSFC and reorganized by the ORNL DAAC into a data
structure consistent with other similar data sets maintained by the
ORNL DAAC.
11. Notes:
Limitations of the Data:
Not available.
Known Problems with the Data:
None known at this revision.
Usage Guidance:
Not available.
Any Other Relevant Information about the Study:
None.
12. Application of the Data Set:
Not available.
13. Future Modifications and Plans:
None known at this revision.
14. Software:
Not available.
15. Data Access:
Contact Information:
ORNL DAAC User Services
P.O. Box 2008
Mail Stop 6407
Oak Ridge National Laboratory
Oak Ridge, TN 37831-6407
Telephone: (423) 241-3952
FAX: (423) 574-4665
Email: ornldaac@ornl.gov
Data Center Identification:
EOSDIS Distributed Active Archive Center
P.O. Box 2008
Mail Stop 6407
Oak Ridge National Laboratory
Oak Ridge, TN 37831-6407
USA
Telephone: (423) 241-3952
FAX: (423) 574-4665
Email: ornldaac@ornl.gov
Procedures for Obtaining Data:
Users may place requests by letter, telephone, electronic mail, FAX,
or personal visit. Data is also available via the World Wide Web at
http://www-eosdis.ornl.gov.
Data Center Status/Plans:
The Superior National Forest Data is available from the ORNL DAAC.
Please contact the ORNL DAAC User Services Office for the most current
information about these data.
16. Output Products and Availability:
Available online, as a computer FTP file (zipped or unzipped), on tape
or IBM-formatted diskettes.
17. References:
Not available.
Archive/DBMS Usage Documentation.
Contact the EOS Distributed Active Archive Center (DAAC) at Oak Ridge
National Laboratory (ORNL), Oak Ridge, Tennessee (see the Data Center
Identification Section). Documentation about using the archive and/or
online access to the data at the ORNL DAAC is not available at this
revision.
18. Glossary of Terms:
A general glossary for the DAAC is located at EOSDIS Glossary.
19. List of Acronyms:
NWS
National Weather Service
URL
Uniform Resource Locator
A general list of acronyms for the DAAC is available at
http://cdiac.esd.ornl.gov/cdiac/pns/acronyms.html.
20. Document Information:
Document Revision Date:
October 17, 1996.
Document Review Date:
February 4, 1997.
Document ID:
ORNL-SNF_MET_1982.
Citation:
Please cite the following NASA Technical Memorandum 104568 in any work
or any publication using these data:
Hall, F.G., K.F. Huemmrich, D.E. Strebel, S.J. Goetz, J.E. Nickeson,
and K.D. Woods, July 1992. Biophysical, Morphological, Canopy Optical
Property, and Productivity Data From the Superior National Forest.
NASA Technical Memorandum 104568. National Aeronautics and Space
Administration, Washington, D.C. 20546.
Document Curator:
Donna O. Lambert
dlambert@daacs.esd.ornl.gov
Document Author: Merilyn J. Gentry
mjg@walden.rmt.utk.edu
Document URL:
http://www-eosdis.ornl.gov /SNF/guides/nws_daily_climate_1982.html
_________________________________________________________________
SNF Home Page | Oak Ridge DAAC Home Page | ORNL Home Page
ORNL DAAC User Services Office: 423-241-3952; email
ornldaac@ornl.gov
Web Document Curator: Sarah Jennings, xqj@ornl.gov
Document Editor: Donna Lambert Revision Date: September 24, 1997
URL: http://www-eosdis.ornl.gov
/SNF/guides/nws_daily_climate_1982.html