Santee Experimental Forest, Santee Headquarters Half-Hourly Weather Data, 2003-2005

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Amatya, Devendra M. and Trettin, Carl C.
Publication_Date: 2012
Title:
Santee Experimental Forest, Santee Headquarters Half-Hourly Weather Data, 2003-2005
Geospatial_Data_Presentation_Form: database
Description:
Abstract:
The Omnidata datalogger and associated sensors at the Santee Headquarters weather station in Cordesville, SC were replaced by a Campbell Scientific CR10X datalogger and sensors in August 2001. In April 2003 measurement of net radiation was added to the suite of climatic variables (including average air temperature, wind speed and direction, solar radiation, relative humidity, and total precipitation and maximum and minimum relative humidity) monitored at this location, and the reporting interval for the datalogger was changed from one hour to 30 minutes. The datalogger was also programmed to calculate average vapor pressure at this time.
Purpose:
The purpose of the data set is to provide researchers with half-hourly estimates of a suite of climatic variables at the Santee Headquarters weather station, located adjacent to the headquarters offices and laboratories of the Santee Experimental Forest.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2003
Ending_Date: 2005
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent:
The geographic area covered by the dataset is the Santee Headquarters weather station, located adjacent to the headquarters office and laboratories of the Santee Experimental Forest.
Bounding_Coordinates:
West_Bounding_Coordinate: -79.78153
East_Bounding_Coordinate: -79.76300
North_Bounding_Coordinate: 33.15007
South_Bounding_Coordinate: 33.13284
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Forested watersheds
Theme_Keyword: Solar radiation
Theme_Keyword: Net radiation
Theme_Keyword: Wind speed
Theme_Keyword: Wind direction
Theme_Keyword: Air Temperature
Theme_Keyword: Vapor pressure
Theme_Keyword: Relative humidity
Theme_Keyword: Precipitation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: South Carolina
Place_Keyword: Coastal Plain
Place_Keyword: Santee Experimental Forest
Place_Keyword: Santee Headquarters
Access_Constraints: None
Use_Constraints:
These data were collected by USDA Forest Service researchers. In order to use the data in a publication, presentation or other research product you must agree to acknowledge its source. Please use the reference below when citing this work:

(Data name) courtesy of the USDA Forest Service Center for Forested Wetlands Research.

The following statement may be added after an acknowledgement or credit:

The USDA Forest Service Center for Forested Wetlands Research homepage is http://www.srs.fs.usda.gov/charleston/.
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Manual rainfall measurements were made using a 0.20 m (8-inch) diameter National Weather Service (NWS) Standard Rain Gauge with its opening 0.8 m from the ground. Manual air temperature measurements were made using standard max/min and ambient thermometers (at 1.52 m inside a ventilated wooden enclosure).

A suite of climatic variables were recorded electronically by sensors linked to a Campbell Scientific CR10X datalogger. Rainfall event data recorded by a tipping bucket gauge were calibrated to the total rainfall collected by the adjacent manual gauge between download intervals. Air temperature data were checked against the standard max/min and ambient thermometers.
Logical_Consistency_Report:
Visual inspection of electronically plotted data and comparison with data from other SEF stations were employed to expose anomalous values.
Completeness_Report:
Periods of missing or unreliable data include the following:

Gap in data from 2/21/03 10:00 to 4/2/03 14:00.
All data also missing for 4/14/03 11:00 to 11:30, and 8/1/03 0:00.

Q7.1 net radiometer installed 4/2/03 13:00 (at which point half-hourly observations commenced).

Vapor pressure calculation began 4/2/03 14:30.
Relative humidity maximum and minimum values recorded beginning 4/2/03 14:30, but for 2003 data stops 12/7/03 15:00.

Rainfall data unreliable or missing for the period 1/1/03 1:00 to 4/2/03 14:00; data unreliable from 6/29/03 13:00 to 6/30/03 14:30.

Net radiation data suspect from about 8/1/04 to 12/17/04 because of broken top dome.
Data for all parameters missing for 4/23/04 13:30 and 11/1/04 0:00.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
Starting in April 2003 a suite of climatic variables were recorded electronically every 30 minutes by sensors linked to a Campbell Scientific CR10X datalogger. Data was downloaded directly to a laptop computer using PC208 software.

Sensors installed with the CR10X datalogger included: CS500 temperature and relative humidity probe (1.96 m from ground); Met One 34A windset (2.87 m from ground); LI-COR LI200X pyranometer (2.93 m from ground); Texas Electronics TE525WS tipping bucket rain gauge (with its opening 0.6 m from ground); and a Radiation and Energy Balance Systems Q7.1 net radiometer (2.64 m from ground).

At the same time that the electronic data were collected, the adjacent manual rain gauge water level was recorded using a dipstick and then dumped. Max/min and current ambient air temperature were also recorded (at 1.52 m inside a ventilated wooden enclosure).
Process_Step:
Process_Description:
Electronic data were downloaded from the CR10X datalogger to a laptop computer and plotted to check for outliers. The tipping bucket gauge totals were calibrated against the amount of rainfall that had been collected in the adjacent manual gauge.
Process_Date: Unknown
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Variables included in the dataset SanteeHQ_halfhourly_data_2003_2005_rev.xlsx:

Location = weather station location (HQ Office = Santee Headquarters);
Instr_ID = weather station name (SEFHQ = Santee Headquarters weather station);
Date_time_ = instantaneous date and time that data were recorded (format MM/DD/YYYY HH:MM);
Date_instant = date associated with instantaneous data (format MM/DD/YYYY);
Time24_instant = nearest half hour associated with instantaneous data (0 to 23.5);
Solar_rad_ (alias 'AverageSolarRadiation') = 30 minute average solar radiation, in Watts per m2;
Net_rad_Wm (alias 'AverageNetRadiation') = 30 minute average net radiation, in Watts per m2;
Windspeed_ (alias 'AverageWindspeed') = 30 minute average wind speed, in m per sec;
Wind_direc (alias 'AverageWindDirection') = 30 minute wind direction vector, in degrees;
Air_Temp_C (alias 'AverageAirTemperature') = 30 minute average air temperature, in degrees Celsius;
Vapor_Kpa = (alias 'AverageVaporPressure') calculated 30 minute average vapor pressure, in kPa;
max_RH (alias 'MaximumRH') = 30 minute maximum relative humidity, as a fraction;
min_RH (alias 'MinimumRH') = 30 minute minimum relative humidity, as a fraction;
RH (alias 'RelativeHumidity') = 30 minute average relative humidity, as a fraction;
Date_ave = date associated with averaged/totalled/maximum/minimum data (format MM/DD/YYYY HH:MM);
Time24_ave = nearest half hour associated with averaged/totalled/maximum/minimum data (0.5 to 24);
Rainfall_m (alias 'Rainfall') = rainfall total for preceding half hour, in mm; and
Sample_Int = sample interval (in hours).

All missing data were originally assigned the value "-9999"; during database development this code was changed to "null"
Entity_and_Attribute_Detail_Citation:
None
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Metadata_Reference_Information:
Metadata_Date: 20110614
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Southern Research Station, Center for Forested Wetlands Research
Contact_Person: Andy Harrison
Contact_Position: Hydrology Technician
Contact_Address:
Address_Type: mailing and physical
Address: 3734 Hwy 402
City: Cordesville
State_or_Province: SC
Postal_Code: 29434
Country: USA
Contact_Voice_Telephone: 843 336-5603
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
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