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Data Set ID:
NSIDC-0348

SMEX03 Vegetation Data: Alabama, Version 1

This data set includes vegetation data collected over the Soil Moisture Experiment 2003 (SMEX03) area of northern Alabama, USA.

Geographic Coverage

Parameter(s):
  • Vegetation > Biomass
  • Vegetation > Plant Characteristics
  • Vegetation > Plant Phenology
  • Vegetation > Vegetation Cover
Spatial Coverage:
  • N: 35.16, S: 34.68, E: -85.78, W: -87.07

Spatial Resolution: Not Specified
Temporal Coverage:
  • 22 June 2003 to 1 July 2003
Temporal Resolution: Not specified
Data Format(s):
  • Microsoft Excel
  • ASCII Text
Platform(s) GROUND-BASED OBSERVATIONS
Sensor(s): VISUAL OBSERVATIONS
Version: V1
Data Contributor(s): Tommy Coleman, Teferi Tsegaye, Robert Metzl, Marius Schamschula
Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Coleman, T., T. Tsegaye, R. Metzl, and M. Schamschula. 2008. SMEX03 Vegetation Data: Alabama, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: http://dx.doi.org/10.5067/YVQTPSF4VZ9N. [Date Accessed].

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Detailed Data Description

This data set includes vegetation data collected over the Soil Moisture Experiment 2003 (SMEX03) area of northern Alabama, USA.

Data are provided in an Excel file and as a separate tab-delimited ASCII text file. The text file contains the same data as the Excel file. Data that were not collected are shown as –99 in the data files.

Format

Table 1 describes the column headings for the files in this data set.

Table 1. Column Headings for AL_SMEX03_vegetation.txt and AL_SMEX03_vegetation.xls
Column Column Heading Description
1 Field Field ID
2 Rep Sampling Site ID
3 Crop Crop type
4 Date (mm/dd/yyyy) Date as month/day/year
5 DOY Day of year
6 Time (CDT) Time in Central Daylight Time (CDT), notated with a decimal. The time recorded as 0.524305556, for example, is 12:35 p.m. (24 hrs x 0.524305556 = 12.58333344; 60 min x 0.58333344 = 35).
7 Team Collection team’s name
8 Latitude WGS84 Latitude in decimal degrees
9 Longitude WGS84 Longitude in decimal degrees
10 Plant Height (m) Plant height in meters
11 Plant Phenology Plant phenology
12 Number of Plants in 5 rows Per 1 meter Total number of plants in 5 rows per 1 meter along each row
13 Stand Density (plants/m) Number of plants per meter along each row
14 Row Spacing (m) Row spacing in meters
15 Row Direction Row direction: North/South or East/West
16 Stand Density Per Unit Area (plants/m2) Plant stand density per meters squared
17 Plant Mean Wet Biomass (kg) Mean wet biomass of each plant in kilograms
18 Plant Mean Dry Biomass (kg) Mean dry biomass of each plant in kilograms
19 Wet Biomass Per Unit Area (kg/m2) Wet biomass in kilograms per meter squared
20 Dry Biomass Per Unit Area (kg/m2) Dry biomass in kilograms per meter squared
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File Size

File sizes range from 3 KB to 66 KB.

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Volume

Total volume is approximately 91 KB.

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Spatial Coverage

Southernmost Latitude: 34.68 º N 
Northernmost Latitude: 35.16 º N
Westernmost Longitude: 87.07 º W
Easternmost Longitude: 85.78 º W

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Temporal Coverage

22 June 2003 to 1 July 2003

Temporal Resolution

Readings were taken once or twice for each of the sampling sites throughout the duration of the study.

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Parameter or Variable

Parameter Description

Table 2 describes the units of measurement and the collection source or calculation of each parameter.

Table 2. Parameter Descriptions
Parameter Unit of Measurement Collection Source or Calculation
Plant Height Meters (m) Manual data collection
Plant Phenology Plant and leaf structure Manual data collection
Stand Density Plants per meter (plants/m) The number of plants per 1 meter along each row
Row Spacing Meters (m) Manual data collection
Row Direction N/S or E/W Manual data collection
Stand Density Per Unit Area Plants per meter squared (plants/m2) The total number of plants in 5 rows divided by the area of 4 row spacings
Plant Mean Wet Biomass Kilograms (kg) Manual data collection
Plant Mean Dry Biomass Kilograms (kg) Manual data collection
Wet Biomass Per Unit Area Kilograms per meter squared (kg/m2) The plant mean wet biomass multiplied by the stand density per unit area
Dry Biomass Per Unit Area Kilograms per meter squared (kg/m2) The plant mean dry biomass multiplied by the stand density per unit area

Sample Data Record

A sample file of this data set is shown in Figure 1. The first four columns and the last two columns of the first four rows of AL_SMEX03_vegetation.txt are displayed. The Excel file AL_SMEX03_vegetation.xls contains the same data as AL_SMEX03_vegetation.txt.

        Field   Rep   Crop   Date        ...   Wet Biomass Per Unit Area   Dry Biomass Per Unit Area	
        AL 1    A     Corn   6/22/2003   ...   0.05446                     0.00787	
        AL 1    B     Corn   6/22/2003   ...   0.07524                     0.01050	
        AL 1    C     Corn   6/22/2003   ...   0.04659                     0.00591	
        AL 1    A     Corn   7/1/2003    ...   0.15568                     0.01848	
Figure 1. Sample Data Record
 
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Data Acquisition and Processing

Sensor or Instrument Description

A balance was used to weigh plant samples, a measuring tape to measure their length, and an oven to dry them. 

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References and Related Publications

Contacts and Acknowledgments

Investigator(s)

Tommy Coleman 
Alabama A&M University
Huntsville, Alabama 
USA

Teferi Tsegaye 
Alabama A&M University
Huntsville, Alabama 
USA

Robert Metzl 
Alabama A&M University
Huntsville, Alabama 
USA

Marius Schamschula 
Alabama A&M University
Huntsville, Alabama 
USA

Acknowledgments: 

The investigators would like to acknowledge Dr. Charles Laymon and Dr. Mohammad Al-Hamdan at the Universities Space Research Association, the Global Hydrology and Climate Center, NASA Marshall Space Flight Center, Alabama A&M University, and the many Alabama A&M students, faculty, and staff members who collected and processed the field data.

Document Information

DOCUMENT CREATION DATE

5 June 2008

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