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LBA-ECO CD-04 CO2 PROFILES, KM 83 TOWER SITE, TAPAJOS NATIONAL FOREST

Federal Geographic Data Committee (FGDC) Metadata:

Identification_Information
Data_Quality_Information
Spatial_Reference_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: DA ROCHA, H.R.GOULDEN, M.L.MILLER, S.D.

Publication_Date: 2009

Title: LBA-ECO CD-04 CO2 PROFILES, KM 83 TOWER SITE, TAPAJOS NATIONAL FOREST

Edition:

Geospatial_Data_Presentation_Form: Online Files

Series_Information:

Series_Name:
Issue_Identification:

Publication_Information:

Publication_Place: Oak Ridge, Tennessee, U.S.A.
Publisher: Oak Ridge National Laboratory Distributed Active Archive Center

Other_Citation_Details:

Online_Linkage: http://mercury.ornl.gov/ornldaac/send/query?term2=947&term2attribute=fileID

Description:

Abstract:: We used two independent approaches, biometry and micrometeorology, to determine the net ecosystem production (NEP) of an old growth forest in Para, Brazil. Biometric inventories indicated that the forest was either a source or, at most, a modest sink of carbon from 1984 to 2000 (+0.8 +/- 2 Mg C(.)ha(-1.)yr(-1); a positive flux indicates carbon loss by the forest, a negative flux indicates carbon gain). Eddy covariance measurements of CO2 exchange were made from July 2000 to July 2001 using both open- and closed-path gas analyzers. The annual eddy covariance flux-calculated without correcting for the underestimation of flux on calm nights indicated that the forest was a large carbon sink (-3.9 Mg C.ha(-1.)yr(-1)). This annual uptake is comparable to past reports from other Amazonian forests, which also were calculated without correcting for calm nights. The magnitude of the annual integral was relatively insensitive to the selection of open- versus closed-path gas analyzer, averaging time, detrending, and high-frequency correction. In contrast, the magnitude of the annual integral was highly sensitive to the treatment of calm nights, changing by over 4 Mg C(.)ha(-1.)yr(-1) when a filter was used to replace the net ecosystem exchange (NEE) during nocturnal periods with u* < 0.2 m/s. Analyses of the relationship between nocturnal NEE and u* confirmed that the annual sum needs to be corrected for the effect of calm nights, which resulted in our best estimate of the annual flux (+0.4 Mg C(.)ha(-1.)yr(-1)). The observed sensitivity of the annual sum to the u* filter is far greater than has been previously reported for temperate and boreal forests. The annual carbon balance determined by eddy covariance is therefore less certain for tropical than temperate forests. Nonetheless, the biometric and micrometeorological measurements in tandem provide strong evidence that the forest was not a strong, persistent carbon sink during the study interval.
Purpose:: Not Available
Supplemental_Information:: Not Available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20000701
Ending_Date: 20040312

Currentness_Reference:Unknown

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -54.9707
East_Bounding_Coordinate: -54.9707
North_Bounding_Coordinate: -3.017
South_Bounding_Coordinate: -3.017

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE
Theme_Keyword: IRGA > INFRARED GAS ANALYZERS
Theme_Keyword: SONIC ANEMOMETER
Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM
Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM
Theme_Keyword: LBA-ECO > NASA'S COMPONENT OF THE LARGE-SCALE BIOSPHERE-ATMOSPHERE EXPERIMENT IN AMAZONIA
Theme_Keyword: Co2
Theme_Keyword: Profile
Theme_Keyword: Logged Site
Theme_Keyword: Flux Tower
Theme_Keyword: Storage Flux
Theme_Keyword: Kilometer 83
Theme_Keyword: Carbon Dioxide
Theme_Keyword: Tapajos Forest
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENVIRONMENT
Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > SOUTH AMERICA > AMAZONIA

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: H. R. DA ROCHA

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:: Not Available
Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: ORNL_DAAC > THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC)
Contact_Person: ORNL DAAC USER SERVICES OFFICE

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address
Address: ORNL DAAC User Services Office
Address: Oak Ridge National Laboratory
City: Oak Ridge
State_or_Province: TN
Postal_Code: 37831-6407
Country: USA

Contact_Voice_Telephone: (865) 574-7447

Contact_Electronic_Mail_Address: uso@daac.ornl.gov

Resource_Description: 947

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:: http://daac.ornl.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:: http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=947...

Access_Instructions:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:: http://daac.ornl.gov//LBA/guides/CD04_CO2_Profiles...

Access_Instructions:

LBA-ECO CD-04 CO2 PROFILES, KM 83 TOWER SITE, TAPAJOS NATIONAL FOREST

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20091110

Metadata_Review_Date: 20120810

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: ORNL DAAC USER SERVICES OFFICE

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address
Address: ORNL DAAC User Services Office
Address: Oak Ridge National Laboratory
City: Oak Ridge
State_or_Province: TN
Postal_Code: 37831-6407
Country: USA

Contact_Voice_Telephone: (865) 574-7447

Contact_Electronic_Mail_Address: uso@daac.ornl.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

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