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Investigation:

ND-02 (Davidson / Stone / Markewitz / Carvalho / Sa / Vieira / Moutinho / Figueiredo)

LBA Dataset ID:

ND02_SOIL_EXTRACTS

Originator(s):

1. MARKEWITZ, D.
2. DAVIDSON, E.A.
3. FIGUEIREDO, R.D.O.
      4. MOUTINHO, P.R.
5. NEPSTAD, D.C.

Point(s) of Contact:

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Dataset Abstract:

The objective of this study was to investigate the role of dissolved CO2 (H2CO3*) as a mechanism of cation removal from surface soils under secondary land uses in the tropics. Soil leachate columns were prepared with 0-10 cm soils from mature and secondary forest, and managed pastures, and extracted with H2CO3* from deionized water equilibrated with 0%, 0.5%, 1%, and 10% CO2 (g).

Beginning Date:

2002-01-01

Ending Date:

2002-10-31

Metadata Last Updated on:

2012-03-29

Data Status:

Archived

Access Constraints:

PUBLIC

Data Center URL:

http://daac.ornl.gov/

Distribution Contact(s):

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Access Instructions:

PUBLIC

Data Access:

IMPORTANT: The LBA-ECO Project website is no longer being supported. Links to external websites may be inactive. Final data products from the LBA project can be found at the ORNL DAAC. Please follow the fair use guidelines found in the dataset documentation when using or citing LBA data.
Datafile(s):

LBA-ECO ND-02 Cation Leaching from Forest and Pasture Soils, Para, Brazil:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1074

Documentation/Other Supporting Documents:

LBA-ECO ND-02 Cation Leaching from Forest and Pasture Soils, Para, Brazil:  http://daac.ornl.gov/LBA/guides/ND02_Soil_CO2_Extracts.html

Citation Information - Other Details:

Markewitz, D., E.A. Davidson, R.D.O. Figueiredo, P.R. Moutinho and D.C. Nepstad. 2012. LBA-ECO ND-02 Cation Leaching from Forest and Pasture Soils, Para, Brazil. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/ORNLDAAC/1074

Keywords - Theme:

Parameter Topic Term Source Sensor
CALCIUM LAND SURFACE SOILS LABORATORY AA (ATOMIC ABSORPTION SPECTROMETER)
CATION EXCHANGE CAPACITY LAND SURFACE SOILS LABORATORY AA (ATOMIC ABSORPTION SPECTROMETER)
DISSOLVED SOLIDS TERRESTRIAL HYDROSPHERE WATER QUALITY/WATER CHEMISTRY LABORATORY AA (ATOMIC ABSORPTION SPECTROMETER)
LAND COVER LAND SURFACE LAND USE/LAND COVER FIELD INVESTIGATION HUMAN OBSERVER
MAGNESIUM LAND SURFACE SOILS LABORATORY AA (ATOMIC ABSORPTION SPECTROMETER)
POTASSIUM LAND SURFACE SOILS LABORATORY AA (ATOMIC ABSORPTION SPECTROMETER)

Uncontrolled Theme Keyword(s):  CARBON DIOXIDE , CATIONS, LEACHING, SOILS

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Pará Eastern (Belém) Paragominas -2.98300 -2.98300 -47.51600 -47.51600

Related Publication(s):

Markewitz, D., E. Davidson, P. Moutinho, and D. Nepstad. 2004. Nutrient loss and redistribution after forest clearing on a highly weathered soil in Amazonia. Ecological Applications 14(4):S177.

Markewitz, D., R.O. Figueiredo, and E. Davidson. 2006. CO2-driven cation leaching after tropical forest clearing. Journal of Geochemical Exploration 88(1-3):214-219.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Data are provided in a single comma-delimited ASCII file: ND02_CO2_soil_solution.csv

Data Contact: Dan Markewitz



File organization and contents:



Column Column Variable Description

Number Heading

1 Gas Concentration (%) of CO2 in the gas bubbled through the extraction solution

2 Landuse Land cover under which the surface soils were sampled. In 1996 the capoeira was ~19 yrs,old, the Mata was an undisturbed mature forest, and the pasto was managed pasture in the region. Details of sampling are available in Markewitz et al., 2004. Ecological Applications 14:S177,199.

3 Week Week after initiation of the project that soils were extracted with solutions

4 Day Day since initiation of the project on which soils were extracted with solutions

5 SeqDay Sequential day of solution extraction. This ignores the incubation period and strings all days of extraction together sequentially.

6 Extvolml Actual amount of solution recovered on each day of extraction in mL

7 Seqvolml Cumulative amount of solution extracted in mL over all days of extraction

8 Ca_mgL Concentration of Ca in solution in mg/L

9 K_mgL Concentration of K in the extract solution in mg/L

10 Mg_mgL Concentration of Mg in the extract solution in mg/L

11 Ca_ug Content of Ca in the extract solution in ug

12 K_ug Content of K in the extract solution in ug

13 Mg_ug Content of Mg in the extract solution in ug

14 CumCa_ug Cumulative content of Ca extracted in ug

15 CumK_ug Cumulative content of K in the extract solution in ug

16 CumMg_ug Cumulative content of Mg in the extract solution in ug







Example data records:



Gas,Landuse,Week,Day,SeqDay,Extvolml,Seqvolml,Ca_mgL,K_mgL,Mg_mgL,Ca_ug,K_ug,Mg_ug,CumCa_ug,CumK_ug,CumMg_ug

0,Capoeira,1,1,1,21,21,19.46,7.343,1.46,406,153,30,406,153,30

0,Capoeira,1,2,2,46,67,2.849,2.08,0.72,132,97,33,538,250,63

0,Capoeira,1,3,3,56,123,1.358,1.295,0.417,76,73,23,615,322,87

0,Capoeira,1,4,4,56,179,0.985,0.961,0.328,55,54,18,670,376,106

0,Capoeira,1,5,5,44,224,0.953,0.801,0.306,42,35,14,712,412,119

0,Capoeira,1,6,6,36,260,0.802,0.689,0.251,29,25,9,741,437,128

0,Capoeira,1,7,7,49,309,0.685,0.489,0.223,33,24,11,774,461,139

0,Capoeira,3,15,8,61,370,3.352,1.132,1.576,206,70,97,980,530,236

... [Records intentionally omitted]

10,Pasto,20,125,30,51,1621,0.499,0.031,0.066,26,2,3,2467,890,683

10,Pasto,20,126,31,55,1676,0.4,0.005,0.068,22,0,4,2489,891,687

10,Pasto,20,127,32,72,1748,0.527,0.012,0.091,38,1,7,2527,891,693

10,Pasto,20,128,33,68,1816,0.408,0.073,0.07,28,5,5,2554,896,698

10,Pasto,20,129,34,58,1875,0.409,0.037,0.076,24,2,4,2578,899,702

10,Pasto,20,130,35,75,1949,0.024,0,0.01,2,0,1,2580,899,703

Data Application and Derivation:

The column extractions were performed over a period of 20 weeks with 7 days of CO2 equilibrated water being passed through the columns on week 1, 3, 6, 11, and 20. In the intervening weeks, soils were left in the columns in contact with interstitial waters. After each day (24 hour period) solutions in containment vessels were capped, weighed for volume, and retained for later analysis. Daily volumes as well as sequentially collect volumes (i.e., continuously summed volumes) are presented. Daily concentration for Ca, Mg, and K are presented as are the contents of these elements extracted (i.e., the concentration times the solution volume). These contents are also provided as a continuous sum (i.e, cumulative amounts). No other manipulations of data are required for utilization. Soil masses extracted are available in the publication.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

These laboratory generated data are relatively simple, required no adjustments, and are of high quality. Within the laboratory standard reference materials (ERA, Arvada, CO) were utilized to maintain quality assurance.

Process Description:

Data Acquisition Materials and Methods:

Solution chemical data for the extracts was obtained on a Perkin-Elmer atomic adsorption spectrophotometer AAAnalyst 100. Calcium and Magnesium were determined on a nitrous oxide flame using adsorption while potassium was on an acetylene flame using emission.

References:

Markewitz, D., R.O. Figueiredo, and E. Davidson. 2006. CO2-driven cation leaching after tropical forest clearing. Journal of Geochemical Exploration 88(1-3):214-219.




Nepstad, D.C., de Carvalho, C.R., Davidson, E.A., Jipp, P.H., Lefebvre, P.A., Negreiros, G.H., da Silva, E.D., Stone, T.A., Trumbore, S.E., Vieira, S., 1994. The deep-soil link between water and carbon cycles of Amazonian forests and pastures. Nature 372, 666-669





Uhl, C., Buschbacher, R., Serrao, E.A.S., 1988. Abandoned pastures in eastern Amazonia: I. Patterns of plant succession. Journal of Ecology 76, 663-681.

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