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LBA-ECO LC-19 Soil and Vegetation Data for Cerrado and Forested Sites, Brazil: 2002
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Revision date: December 10, 2014

Summary:

This data set provides measurements for soil physical and chemical properties, root depth and weight, leaf area index (LAI), plant area index (PAI), biomass, fraction of photosynthetically active radiation (fPAR), and ground-based reflectance measurements of soil and litter samples. The samples were collected from 23 areas within the Brazilian research sites of the Brasilia National Park (BNP) and Aguas Emnendadas Ecological Station (AE), Brasilia; Cangacu Research Center, Tocantins; and Tapajos National Forest, Para.

The research areas were in the most intensely stressed areas in Brazil, with rapid and aggressive land use conversions in forested and cerrado-transition areas. These field measurements were conducted from June to July 2002.

There are 61 comma-delimited (.csv) data files with this data set.

Field Sampling forest sample collections

Figure 1. Field sampling in the cerrado and forest (photos taken from the data set companion file, LC-19_LBA_Soil_Field_2002.pdf).

 

Data Citation:

Cite this data set as follows:

Huete, A.R., L.G. Ferreira, and T. Miura. 2014. LBA-ECO LC-19 Soil and Vegetation Data for Cerrado and Forested Sites, Brazil: 2002. Data set. Available on-line (http://daac.ornl.gov) from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA http://dx.doi.org/10.3334/ORNLDAAC/1261.

Implementation of the LBA Data and Publication Policy by Data Users:

The LBA Data and Publication Policy [http://daac.ornl.gov/LBA/lba_data_policy.html] is in effect for a period of five (5) years from the date of archiving and should be followed by data users who have obtained LBA data sets from the ORNL DAAC. Users who download LBA data in the five years after data have been archived must contact the investigators who collected the data, per provisions 6 and 7 in the Policy.

This data set was archived in December of 2014. Users who download the data between December 2014 and November 2019 must comply with the LBA Data and Publication Policy.

Data users should use the Investigator contact information in this document to communicate with the data provider.

Data users should use the Data Set Citation and other applicable references provided in this document to acknowledge use of the data.

Table of Contents:

1. Data Set Overview:

Project: LBA (Large-Scale Biosphere-Atmosphere Experiment in the Amazon)

Activity: LBA-ECO

LBA Science Component: Land Use and Land Cover

Team ID: LC-19 (Huete / Ferreira / Sano)

The investigators were Huete, Alfredo R.; Ferreira, Laerte Guimaraes; Sano, Edson Eyji; Barbosa, Humberto Alves; Bustamante, Mercedes M.C.; Cardim, Pericles; Carvalho, Ana Paula Ferreira; Didan, Kamel; Espirito-Santo, Fernando Del Bon; Ferreira, Manuel Eduardo; Klink, Carlos Augusto; Lobo, Fabio Carneiro; McCubbin, Ian B; Miura, Tomoaki; Ratana, Piyachat and Shimabukuro, Yosio Edemir. You may contact Dr. Alfredo Huete (ahuete@ag.arizona.edu).

LBA Data Set Inventory ID:

This data set provides measurements for soil physical and chemical properties, root depth and weight, leaf area index (LAI), plant area index (PAI), biomass, fraction of photosynthetically active radiation (fPAR), and ground-based reflectance measurements of soil and litter samples. The samples were collected from 23 areas within the Brazilian research sites of the Brasilia National Park (BNP), Aguas Emnendadas Ecological Station (AE), Cangacu near Bananal Island, and Tapajos areas. The research areas were in the most intensely stressed areas in Brazil, with rapid and aggressive land use conversions in forested and cerrado-transition areas. These field measurements were conducted from June to July 2002.

2. Data Characteristics:

There are 61 data files in .csv format. Samples were collected from 23 areas within the Brazilian research sites of the Brasilia National Park (BNP), Aguas Emnendadas Ecological Station (AE), Cangacu near Bananal Island, and Tapajos areas, however, not all parameters included measurements from all areas. The research site descriptions are provided in Table 1.

The data files provide measurements for soil physical and chemical properties, Analytical Spectral Devices (ASD) spectroradiometer reflectance measurements of soil and litter samples, rooting depth, leaf area index (LAI), plant area index (PAI), fraction of photosynthetically active radiation (fPAR), and oven-dry biomass (g).

Soil Physical and Chemical Properties Data

The files for soil physical and chemical properties describe the research site (time, transect length, weather conditions, air temperature, longitude, latitude), and provide data for color, rooting depth, and bulk density for soils sampled.

The research sites include Brasilia, Tapajos, and Cangussu and there are eight data files per site in .csv format. There are also companion files for each site in .pdf format which provide the data collection information and photographs of the sites and samples.

Example data file names:

LC-19_LBA_Soil_AEcg_Field_2002.csv
LC-19_LBA_Soil_CAcw_Field_2002.csv
LC-19_LBA_Soil_TP83sl1_Field_2002.csv

Companion files for the sites:

LC-19_LBA_Soil_FieldSample_2002_Z.pdf   where "Z" is Brasilia, Cangussu, or Santarem (for Tapajos). These files are also available upon request from the ORNL DAAC data center in .xls format as provided by the investigator for access to full-size images.

There are three files for soil physical-chemical data in .csv format.

1) LC-19_LBA_Soil_ChemPhysi_Field_2002: Soil samples for chemistry and texture analyses at Embrapa Cerrados.
2) LC-19_LBA_Soil_BulkDensity_Field_2002: Bulk density data for five sites at Brasilia National Park and by vegetation class. The sites include AE = Aguas Emendadas Ecological Station; RJ = Rio de Janeiro Farm; CA = Cangucu; SA = Santana do Araguaia; and TP = Tapajos.
3) LC-19_LBA_Soil_Moisture_Field_2002: Moisture Data for six sites and by vegetation class. The sites include BNP = Brasilia National Park; AE = Aguas Emendadas Ecological Station; RJ = Rio de Janeiro Farm; CA = Cangucu; SA = Santana do Araguaia; and TP = Tapajos.

ASD Measurements

There are 26 data files in .csv format for ASD measurements at 400-2400 wavelengths. The files are named by research site and vegetation class. The file headers provide specific sample types, sampling depths, and vegetation class descriptions. The site abbreviations are in the file names: AE = Aguas Emendadas Ecological Station; RJ = Rio de Janeiro Farm; CA = Cangucu; SA = Santana do Araguaia; and TP = Tapajos, and BNP =Brasilia National Park.

Example file names:

LC-19_LBA_ASD_Soil_CAcerradao_Field_2002.csv
LC-19_LBA_ASD_Soil_RJwot_Field_2002.csv
LC-19_LBA_ASD_Soil_SAcp_Field_2002.csv

Vegetation Data:

There are seven files of vegetation data and one file with site location data in .csv format. The data are presented by site and by vegetation class. The sites include BNP = Brasilia National Park; AE = Aguas Emendadas Ecological Station; RJ = Rio de Janeiro Farm; CA = Cangucu; SA = Santana do Araguaia; and TP = Tapajos.

The vegetation data include:

fPAR (one file)- The fraction of photosynthetically active radiation
CoverCompo (four files)-
Cover component (percent cover); includes two files for understory and two files for overtory percent cover.
LAI (one file)-
Plant area index and LAI-Leaf area index
Biomass (one file)- Oven-Dry Biomass (g)

File names:

LC-19_LBA_LAI_Field_2002.csv
LC-19_LBA_Biomass_Field_2002.csv

LC-19_LBA_fPAR_Field_2002.csv
LC-19_LBA_CoverCompo-x_Field_2002.csv (x = 1, 2, 3, or 4)

Table 1 . Research site descriptions

Site # Site Latitude Longitude Description
1 BNP_CW -15.73285 -48.00338 Brasilia National Park Cerrado woodland
2 BNP_WC -15.60981 -48.02948 Brasilia National Park wooded Cerrado
3 BNP_SC -15.58936 -48.00663 Brasilia National Park shrub Cerrado
4 AE_CW -15.57276 -47.59092 Aguas Emendadas Cerrado woodland
5 AE_WC -15.57845 -47.62727 Aguas Emendadas Wooded Cerrado
6 AE_CG -15.54719 -47.61507 Aguas Emendadas Cerrado Grassland
7 RJ_WoT -15.23455 -47.69398 Rio de Janeiro Farm without treatment
8 RJ_BU -15.23003 -47.69225 Rio de Janeiro Farm burned
9 RJ_WT -15.23142
-15.23142
-47.69372
-47.69441
Rio de Janeiro Farm with treatment (0-50m)
Rio de Janeiro Farm with treatment (50-100m)
10 CA_P8 -10.04658 -49.89980 Cangusu 8-year Pasture
11 CA_CW -10.06633 -49.90696 Cangusu Cerrado woodland
12 CA_P3 -10.06339 -49.91322 Cangusu 3-year pasture
13 CA_P1 -10.06155 -49.90547 Cangusu 1-year pasture
14 SA_PA -9.71817 -50.40072 Santana do Araguaia 20-year pasture
15 SA_CP -9.74540 -50.30674 Santana Araguaia Capoeira
16 TP 67U -2.8544 -54.95977 Upland Km67 primary forest
17 TP 67L -2.84238 -54.97889 Lowland primary forest t
18 TP 89U -3.12074 -54.90156 Upland Old Logged forest
19 TP 77RE -3.01520 -54.90799 88-year old regeneration forest
20 TP 93PA -3.12714 -54.94476 112-year old pasture
21 TP 83SL1 -3.04599 -54.95298 selectively logged forest site 1
22 TP 83SL2 -3.03119 -55.01072 selectively logged forest site 2
23 TP 103U -9.74322 -50.30741 Upland old logged forest in Tapajos National Forest

Site boundaries: (All latitude and longitude given in decimal degrees)

Site (Region) Westernmost Longitude Easternmost Longitude Northernmost Latitude Southernmost Latitude
Brasilia - Brasilia National Park (Brasilia) -48.08333 -47.88333 -15.58333 -15.75000
Brasilia - Aguas Emnendadas Ecological Station (AE) -47.6 -47.6 -15.6 -15.6
Tocantins - Cangacu Research Center (Tocantins) -49.9 49.9 -10.1 -10.1
Para Western (Santarem) - km 67 Primary Forest Tower Site (Para Western (Santarem)) -54.95900 -54.95900 -2.85700 -2.85700

Time period:

Platform/Sensor/Parameters measured include:

3. Data Application and Derivation:

The results of this study will enable the detection of 'hotspots' of land conversion activities with the MODIS sensor; enable for their fine-scale analysis with the Landsat ETM+ sensor; and allow a time-series analysis with the AVHRR historical data. This will greatly aid seasonal and inter-annual carbon balance studies in the Cerrado and Amazon transition regions.

4. Quality Assessment:

Not available.

5. Data Acquisition Materials and Methods:

The samples were collected from 23 areas within Brazilian research sites described in Table 1. The research areas were in the most intensely stressed areas in Brazil, with rapid and aggressive land use conversions in forested and cerrado-transition areas.

Soil, Roots, and Litter Sampling and Measurements

Soil samples were collected at 25, 65, and 120 m along established transects at each site. If physical differences in soil samples were apprarent with depth, additional samples were collected (averaged depth changes). The samples were sieved in a 2-mm sieve, photographed, stored in separate zip-lock bags, and sent to the laboratory for chemical analysis.

roots and soils

Figure 2. Roots and soil sample after seiving.


Samples for ASD measurements

Figure 4. ASD measurements being taken of soil and litter samples. 

 

Vegetation Sampling and Measurements

fAPAR measurements: Estimations of the fraction of Absorbed Photosynthetically Active Radiation (fAPAR) were made from June 10 through July 21, 2002. Transect, selected plant, and biomass measurements were made with a Decagon Accupar PAR-80 instrument. fAPAR was typically determined by 1) measuring the incident and reflected radiation for patches of bare soil, 2) measuring the incident and reflected radiation above the understory layer, and 3) measuring the transmitted radiation at the base of the understory.

In shrubby and forested areas a Licor LI-190SA Quantum Sensor was used in a clearing or on a tower to obtain PAR0 values. Accupar measurements were done within one hour of local noon to minimize the solar zenith angle. Unfortunately, by midday clouds often obscured the sun compromising the quality.  Refer to the companion file LC-19_LBA_fAPARreport_Field_2002.pdf for additional information.

PAI Measurements: Estimations of the Plant Area Index (PAI) were made for transects and selected plants from June 10 through July 21, 2002, with one or more Licor LAI2000 instruments. The 90-degree cap was used for all measurements. Because direct lighting will depress PAI values, measurements were done before sunrise or when plants were shaded, naturally or artificially.

For additional general information regarding the 2002 LBA Field Campaign in Brazil, refer to the companion file LC-referenced i19_LBA_Soil_Field.pdf.

6. Data Access:

This data set is available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).

Data Archive Center:

E-mail: uso@daac.ornl.gov
Telephone: +1 (865) 241-3952

7. References:

Yoshioka, H., Miura, T., Yamamoto, H., and A. Huete. 2003. An Isoline-Based Translation Technique of Spectral Vegetation Index Using EO-1 Hyperion Data. IEEE Transactions on Geoscience and Remote Sensing, 41: 1363-1372.

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