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Investigation:

CD-02 (Ehleringer / Martinelli)

LBA Dataset ID:

CD02_DIC_River_Water

Originator(s):

1. Cook, Craig
2. Domingues, Tomas Ferreira
3. Ehleringer, James
4. Flanagan, Lawrence
      5. Martinelli, Luiz Antonio
6. Ometto, Jean Pierre H.B.
7. Berry, Joseph

Point(s) of Contact:

Ehleringer, Jim (ehleringer@biology.utah.edu)

Dataset Abstract:

This dataset includes measurements of dissolved inorganic carbon stable isotopes and stable isotope ratios of oxygen and hydrogen from river and lake water samples collected from three locations in eastern Para between September 2002 and December 2003. This was a preliminary study and the data were never published. The file formats have been structured to conform to long-term archive standards. Documentation is limited but is provided here requesting that the user recognize that there is missing information. This data set will continue to be available at LBA DIS in Brazil but will not be incorporated into the long-term archive at the ORNL DAAC.

Beginning Date:

2002-09-07

Ending Date:

2003-12-31

Metadata Last Updated on:

2011-01-19

Data Status:

Archived

Access Constraints:

Public

Data Center URL:

Distribution Contact(s):

LBA-DIS User Services (lba-dis@cptec.inpe.br)

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):

Isotopes data of Water and DIC: LBA DIS :  Search at ORNL DAAC
Isotopes data of Water and DIC: Ehleringer web site:  http://ecophys.biology.utah.edu/public/NASA_LBA/Stable_Isotope_Data_River/
Access data via ORNL DAAC's ftp site for LBA-ECO data:  Search at ORNL DAAC

Documentation/Other Supporting Documents:

Readme file:  Search at ORNL DAAC
Data Set User's Guide:  Search at ORNL DAAC
RIver DIC Keeling Curve (jpg):  Search at ORNL DAAC

Citation Information - Other Details:

Ehleringer, J., L.A. Martinelli, J.P. Ometto, et. al. 2010. LBA-ECO CD-02 Carbon and Oxygen Isotopes in River Water. Data set. Available on-line [ http://lba.cptec.inpe.br/] from LBA Data and Information System, National Institute for Space Research (INPE/CPTEC), Cachoeira Paulista, Sao Paulo, Brazil.

Keywords - Theme:

Parameter Topic Term Source Sensor
STABLE ISOTOPES BIOSPHERE ECOLOGICAL DYNAMICS LABORATORY MASS SPECTROMETER

Uncontrolled Theme Keyword(s):  Dissolved inorganic carbon, Keeling plot, carbon dioxide, carbon isotope, oxygen isotope, stable isotope

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Para Western (Santarem) Amazon River
Para Western (Santarem) Lago Curuai -1.82056 -2.33889 -50.02083 -55.83472
Para Western (Santarem) Tapajos River

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

These data are in two comma-delimited ASCII files:

River_18O_2002-2003.csv and

River_DIC_13C_2003.csv.



Data organization File #1: River_18O_2002-2003.csv



File name,River_18O_2002-2003.csv,,,,,,

File date,4-Feb-10,,,,,,

Associated LME File ID,CD02_DIC_River_Water,,,,,,



Column, Column_heading, Units/format, Explanation,,,,

1, Year,, Year in which sample was collected,,,,

2, Month,, Month in which sample was collected,,,,

3, Day,, Day of the month on which sample was collected,,,,

4, Date,, to be removed from final data file,,,,

5, Time,, Time of sample collection in local time (GMT+4),,,,

6, Site_name,, Full name of sampling site,,,,

7, Site_code,, Three letter site code: AMZ= Amazon river water, TAP= Tapajos river water, CUR= Lake Curuai water, VAC= Lake Curuai vapor,,,,

8, Sample_no.,, Sample number for laboratory reference,,,,

9, Sample_type,, Form in which the sample was collected: vapor or water,,,,

10, delta_O18, per mil, Isotopic ratio of 18O/16O in sample referenced to SMOW (standard mean ocean water), measured with continuous flow on Finigan Delta Plus at CENA,,,,

11, delta_O18_rep, per mil, Repeated measurement of the isotopic ratio of 18O/16O in the sample using the same methods,,,,

12 ,delta_H2, per mil, Isotopic ratio of 2H/1H in sample referenced to SMOW (standard mean ocean water), measured with continuous flow on Finigan Delta Plus at CENA,,,,,,,,,,,,,,,,,,,,,

13, delta_H2_rep, per mil, Repeated measurement of the isotopic ratio of 2H/1H in the sample using the same methods

14, Collection_notes,, Observations from the field notes



,missing data is represented by 999,,,,,,,,,,,,,,,,,,,,,,,





Sample data File #1

Year,Month,Day,Date,Time,Site_name,Site_code,Sample_no.,Sample_type,delta_O18,delta_O18_rep,delta_H2,delta_H2_rep,Collection_notes,,,,,,,,,,,

2002,Sept,7,2002/09/07,999,Lake Curuai,VAC,01,vapor,-15.25,-15.32,999, 999, Collected in 1L flasks

2002,Sept,7,2002/09/07,999,Lake Curuai,VAC,02,vapor,-13.347,999,999,999, Collected in 1L flasks

2002,Sept,7,2002/09/07,999,Lake Curuai,CUR,1,water,-5.07,999,-34.37,-34.17,999

2002,Sept,7,2002/09/07,999,Amazon River,AMZ,1,water,-5.12,999,-31.41,999,999

2002,Sept,7,2002/09/07,999,Tapajos River,TAP,1,water,-4.47,999,-29.36,-30.21,999





File name,River_13C_DIC_2003.csv,,,,,,

File date,29-Nov-10,,,,,,

Associated LME File ID,CD02_DIC_River_Water,,,,,,



Column,Column_heading,Units/format,Explanation,,,,

1,Year,,Year in which sample was collected,,,,

2,Month,,Month in which sample was collected,,,,

3,Day,,Day of the month on which sample was collected,,,,

4,Time,,Time of sample collection in local time (GMT+4),,,,

5,Site_name,,Full name of sampling site,,,,

6,Site_code,,Three letter site code: AMZ= Amazon river water, TAP= Tapajos river water, CUR= Lake Curuai water, VAC= Lake Curuai vapor,,,,

7,Sample_type,,Form in which the sample was collected: vapor or water,,,,

8,delta_13C_DIC,per mil,Isotopic ratio of 13C/12C in dissolved inorganic carbon in the water sample referenced to PDB, measured with continuous flow on Finigan Delta Plus at CENA,,,,



Sample data File #2

Year,Month,Day,Time,Site_name,Site_code,Sample_type,delta_13C_DIC

2003,May,24,755,Tapajos River,TAP,water,-20.31

2003,May,24,543,Amazon River,AMZ,water,-17.46

2003,May,24,1400,Tapajos River,TAP,water,-20.43

2003,May,24,520,Tapajos River,TAP,water,-19.92

2003,May,24,620,Tapajos River,TAP,water,-20.47

Data Application and Derivation:

In combination with measurements of isotope ratios from water in plant xylem tissue and atmospheric water vapor these data can help constrain models of water cycling in tropical forest systems.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Standard samples were run along with the field samples for all analyzes to check the calibration of the instruments. There are no known problems with the data.

Process Description:

Data Acquisition Materials and Methods:

Isotopic analyses: The samples were kept cold (0-5 degrees C) in the field and later frozen in the lab until analysis. Oxygen isotope ratios for all water samples were determined by equilibration of water with CO2 (Socki et al. 1999). 13C/12C; 2H/1H; 18O/16O - Measured with continuous flow on Finigan MAT Delta Plus (CENA/USP) performed by online injection of CO2 into a coupled gas chromatograph and isotope ratio mass spectrometer (Delta Plus, Finnigan MAT, Bremen), operating in a continuous flow mode (Fessenden et al. 2002).

References:

Fessenden, J.E., C.S. Cook, M.J. Lott, and J.R. Ehleringer. 2002. Rapid 18O analysis of small sized water samples using a continuous-flow isotope ratio mass spectrometer. Rapid Communications in Mass Spectrometery 16:1257-1260.



Socki, R. A., C. S. Romanek, and E. K. Gibson. 1999. On-line technique for measuring stable oxygen and hydrogen isotopes from microliter quantities of water. Analytical Chemistry 71:2250-2253

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