Santee Experimental Forest, Santee Headquarters Daily Air Temperature Data, 2002-2017.

Metadata:

Identification_Information
Data_Quality_Information
Entity_and_Attribute_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Amatya, Devendra M. and Trettin, Carl C.
Publication_Date: 2018
Title:
Geospatial_Data_Presentation_Form: database

Description:

Abstract:: This dataset contains corrected daily average air temperature data for the CS500 and HMP45C air temperature and relative humidity sensors located at the Santee Headquarters weather station in Cordesville, SC from 2002 to 2017.

Inconsistencies between daily average air temperature data (calculated from 30-minute average temperatures recorded by a CR10X datalogger as measured by a CS500 temperature sensor) at the Santee Headquarters meteorological station and other nearby SEF locations (also the Charleston International Airport) starting in 2002 caused us to examine this data more closely. The sensor was overdue for calibration and/or replacement, but in addition to making sure of accurate measurements in the future we decided to perform a side-by-side comparison of data from the CR10X logger with daily maximum and minimum temperatures recorded by the manual max/min thermometer at the site. Over the course of one year (from August 2010 to July 2011) daily manual maximum and minimum readings were taken and regressed against the corresponding maxima and minima recorded by the CR10X. This allowed us to create statistically valid regression equations (where the equations and their parameters were both significant) that could be used to correct the daily maxima and minima recorded by the CR10X, and therefore also the daily average temperatures, since 2002 (through 8/11/11).

The CS500 sensor was replaced by an HMP45C temperature/RH sensor on 8/12/11. A similar side-by-side comparison between the HMP45C data and daily manual maximum and minimum temperatures was conducted between 9/1/11 and 8/31/12. The comparison showed that although the HMP45C sensor was more accurate than the CS500 sensor had been, the daily average temperatures calculated using its data were still slightly lower than those calculated using the manual thermometer. Therefore we generated new regression equations to correct the daily maximum, minimum and average temperatures from 8/12/11 going forward.

The HMP45C temperature/RH sensor was replaced by an HMP60 sensor on 5/25/17. Once again, a side-by-side comparison between the HMP60 data and daily manual maximum and minimum temperatures was conducted between 6/1/17 and 5/31/18. As before, we generated new regression equations to correct the daily maximum, minimum and average temperatures from 5/25/17 going forward.
Purpose:: The purpose of the data set is to provide researchers with a corrected estimate of daily average air temperatures 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: 2002
Ending_Date: 2017

Currentness_Reference:

ground condition

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

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: -79.78675
East_Bounding_Coordinate: -79.76231
North_Bounding_Coordinate: 33.14802
South_Bounding_Coordinate: 33.11200

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Forested watersheds
Theme_Keyword: Air Temperature

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/.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: The original data from 1/25/02 through 8/11/11 was collected by a CS500 air temperature and relative humidity sensor linked to a CR10X datalogger installed at the Santee Headquarters weather station in August 2001. Data from 8/12/11 going forward was collected by an HMP45C air temperature and relative humidity sensor, also linked to the CR10X datalogger at the same location.

Inconsistencies between daily average temperature data (calculated from 30-minute average temperatures recorded by a CR10X datalogger as measured by the CS500 sensor) at the Santee Headquarters meteorological station and other nearby SEF locations (also the Charleston International Airport) starting in 2002 caused us to examine this data more closely. The sensor was overdue for calibration and/or replacement, but in addition to making sure of accurate measurements in the future we decided to perform a side-by-side comparison of data from the CR10X logger with daily maximum and minimum temperatures recorded by the manual max/min thermometer at the site. Over the course of one year (from August 2010 to July 2011) daily manual maximum and minimum readings were taken and regressed against the corresponding maxima and minima recorded by the CR10X. This allowed us to create statistically valid regression equations (where both the equations and parameters were significant) that could be used to correct the daily maxima and minima recorded by the CR10X, and therefore also the daily average temperatures, since 2002 (through 8/11/11).

The regression equations we developed are as follows:

Corrected CR10X daily maximum T = 1.04*(CR10X daily maximum T); R2 = 0.99, P < 0.0001

Corrected CR10X daily minimum T = 1.05*(CR10X daily minimum T) - 0.86; R2 = 0.99, P < 0.0001

The CS500 sensor was replaced by an HMP45C sensor on 8/12/11. A similar side-by-side comparison between the HMP45C data and daily manual maximum and minimum temperatures was conducted between 9/1/11 and 8/31/12. The comparison showed that although the HMP45C sensor was more accurate than the CS500 sensor had been, the daily average temperatures calculated using its data were still slightly lower than those calculated using the manual thermometer. Therefore we generated new regression equations to correct the daily maximum, minimum and average temperatures from 8/12/11 through 5/24/17.

The new regression equations we developed are as follows:

Corrected CR10X daily maximum T = 1.03*(CR10X daily maximum T); R2 > 0.99, P < 0.0001

Corrected CR10X daily minimum T = 1.03*(CR10X daily minimum T) - 0.15; R2 > 0.99, P < 0.0001

The HMP45C temperature/RH sensor was replaced by an HMP60 sensor on 5/25/17. Once again, a side-by-side comparison between the HMP60 data and daily manual maximum and minimum temperatures was conducted between 6/1/17 and 5/31/18. As before, we generated new regression equations to correct the daily maximum, minimum and average temperatures from 5/25/17 going forward.

The new regression equations we developed are as follows:

Corrected CR1000 daily maximum T = 1.01*(CR1000 daily maximum T); R2 > 0.99, P < 0.0001

Corrected CR1000 daily minimum T = 1.02*(CR1000 daily minimum T) + 0.49; R2 > 0.99, P < 0.0001

Logical_Consistency_Report:

Visual inspection of electronically plotted data and comparison with data from other SEF stations (and other locations, including the Charleston International Airport) were employed to expose anomalous values.

Completeness_Report:

Data missing for the following periods:

1/1/02 to 1/24/02
9/21/02 to 12/16/02

2/21/03 to 4/2/03

9/18/12 to 9/21/12
11/8/12 to 11/28/12

2/4/14 to 3/4/14
8/6/2014

3/17/15 to 4/3/15
4/4/16 to 4/26/16

Lineage:

Methodology:

Methodology_Type: Field
Methodology_Description:: Manual maximum and minimum air temperatures were recorded using a standard max/min thermometer hanging at a height of 1.52 m from the ground inside a ventilated wooden enclosure adjacent to the CR10X weather station.

Data recorded by the CR10X or CR1000 logger and CS500, HMP45C or HMP60 air temperature and relative humidity sensors were downloaded directly to a laptop computer using PC208 or PC200W software, or transmitted via radio from the CR1000 logger to a computer in the office.

Process_Step:

Process_Description:: Inconsistencies between daily average temperature data (calculated from 30-minute average temperatures recorded by a CR10X datalogger as measured by the CS500 sensor) at the Santee Headquarters meteorological station and other nearby SEF locations (also the Charleston International Airport) starting in 2002 caused us to examine this data more closely. The sensor was overdue for calibration and/or replacement, but in addition to making sure of accurate measurements in the future we decided to perform a side-by-side comparison of data from the CR10X logger with daily maximum and minimum temperatures recorded by the manual max/min thermometer at the site. Over the course of one year (from August 2010 to July 2011) daily manual maximum and minimum readings were taken and regressed against the corresponding maxima and minima recorded by the CR10X. This allowed us to create statistically valid regression equations (where both the equations and parameters were significant) that could be used to correct the daily maxima and minima recorded by the CR10X, and therefore also the daily average temperatures, since 2002 (through 8/11/11).

The regression equations we developed are as follows:

Corrected CR10X daily maximum T = 1.04*(CR10X daily maximum T); R2 = 0.99, P < 0.0001

Corrected CR10X daily minimum T = 1.05*(CR10X daily minimum T) - 0.86; R2 = 0.99, P < 0.0001

The CS500 sensor was replaced by an HMP45C sensor on 8/12/11. A similar side-by-side comparison between the HMP45C data and daily manual maximum and minimum temperatures was conducted between 9/1/11 and 8/31/12. The comparison showed that although the HMP45C sensor was more accurate than the CS500 sensor had been, the daily average temperatures calculated using its data were still slightly lower than those calculated using the manual thermometer. Therefore we generated new regression equations to correct the daily maximum, minimum and average temperatures from 8/12/11 through 5/24/17.

The new regression equations we developed are as follows:

Corrected CR10X daily maximum T = 1.03*(CR10X daily maximum T); R2 > 0.99, P < 0.0001

Corrected CR10X daily minimum T = 1.03*(CR10X daily minimum T) - 0.15; R2 > 0.99, P < 0.0001

The HMP45C temperature/RH sensor was replaced by an HMP60 sensor on 5/25/17. Once again, a side-by-side comparison between the HMP60 data and daily manual maximum and minimum temperatures was conducted between 6/1/17 and 5/31/18. As before, we generated new regression equations to correct the daily maximum, minimum and average temperatures from 5/25/17 going forward.

The new regression equations we developed are as follows:

Corrected CR1000 daily maximum T = 1.01*(CR1000 daily maximum T); R2 > 0.99, P < 0.0001

Corrected CR1000 daily minimum T = 1.02*(CR1000 daily minimum T) + 0.49; R2 > 0.99, P < 0.0001
Process_Date: Unknown

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:: Variables included in the datasets SanteeHQ_daily_data_2002_2007_rev2.xlsx, SanteeHQ_daily_data_2008_2011_rev.xlsx, SanteeHQ_daily_data_2012.xlsx, SanteeHQ_daily_data_2013.xlsx, SanteeHQ_daily_data_2014.xlsx, SanteeHQ_daily_data_2015.xlsx, SanteeHQ_daily_data_2016.xlsx, and SanteeHQ_daily_data_2017:

Location = weather station location (HQ Office = Santee Headquarters);
Instr_ID = weather station name (SEFHQ = Santee Headquarters weather station);
Date_ = date associated with air temperature data (format MM/DD/YYYY); and
Corr_ave (alias 'AverageAirTemperature') = daily average temperature, in degrees Celsius.

All missing data were originally assigned the value "-9999"; during database development this code was changed to "null"
Entity_and_Attribute_Detail_Citation:: None

Metadata_Reference_Information:

Metadata_Date: 20181026

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