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Investigation:

CD-10 (Wofsy / Kirchhoff / Camargo / A. Nobre)

LBA Dataset ID:

CD10_TEMPPRO_TAPAJOS

Originator(s):

1. HUTYRA, L.R.
2. MUNGER, J.W.
3. GOTTLIEB, E.W.
      4. DAUBE, B.C.
5. CAMARGO, P.B.
6. WOFSY, S.C.

Point(s) of Contact:

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

Dataset Abstract:

This data set contains a single text file which reports temperature measurements at the km 67 Santarem, Western Para Primary Forest Tower Site. This site is in the Tapajos National Forest located in north central Brazil. Measurements extend from January 2002 through January 2006. Air temperature measurements were collected at 8 levels on the tower (61.9, 49.8, 39.1, 28.4, 18.3, 10.1, 2.8, and 0.6 m). Temperature measurements were made with aspirated thermistors (Met One 076B-4 aspiration with YSI 44032 thermistors) and averaged over a 1 hour interval. Co-located measurements included a LICOR gas analyzer that measured (a) the CO2 and H2O concentration profiles at 8 levels in and above the canopy (1 level every 2 minutes), (b) the instantaneous integrated canopy storage of CO2 and H2O, using a design that pulled air simultaneously through all 8 inlets (once every 20 minutes), and (c) eddy fluxes of CO2 and H2O were measured at two levels (58m and 47m) using tower-mounted closed-path LICOR 6262 gas analyzers and Campbell CSAT3 sonic anemometers. A comprehensive set of meteorological parameters (air pressure, PAR, net radiation, precipitation, etc) were also measured. See related data sets. With the permission of the author, Hutyra, L.R. 2007. Carbon and water exchange in Amazonian rainforests. Ph.D. Thesis, Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, is included as a companion file. These data may be updated or reprocessed from time to time, and it is the user's responsibility to insure that you have the most recent version of the data. For the latest version, please see the following web site: Harvard University, LBA Web Page (http://www-as.harvard.edu/data/lbadata.html)

Beginning Date:

2002-01-01

Ending Date:

2006-01-18

Metadata Last Updated on:

2008-06-13

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 CD-10 Temperature Profiles at km 67 Tower Site, Tapajos National Forest:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=863

Documentation/Other Supporting Documents:

LBA-ECO CD-10 Temperature Profiles at km 67 Tower Site, Tapajos National Forest:  http://daac.ornl.gov/LBA/guides/CD10_Temperature_Profiles_Tapajos.html

Citation Information - Other Details:

Hutyra, L. R., J. W. Munger, E. W. Gottlieb, B. C. Daube, P. B. Camargo and S. C. Wofsy. 2007. LBA-ECO CD-10 Temperature Profiles at km 67 Tower Site, Tapajos National Forest. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/863

Keywords - Theme:

Parameter Topic Term Source Sensor
AIR TEMPERATURE ATMOSPHERE ATMOSPHERIC TEMPERATURE TOWER THERMISTOR
TEMPERATURE PROFILES BIOSPHERE ECOLOGICAL DYNAMICS TOWER THERMISTOR

Uncontrolled Theme Keyword(s):  AIR TEMPERATURE, EDDY COVARIANCE, EDDY FLUX, KM 67, TAPAJOS NATIONAL FOREST, TEMPERATURE, TEMPERATURE PROFILES

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Pará Western (Santarém) km 67 Primary Forest Tower Site -2.85700 -2.85700 -54.95900 -54.95900

Related Publication(s):

Huete, A., K. Didan, Y.E.R.P. Shimabukuro, S. Saleska, L.R.Y.W. Hutyra, and R.R.M.R. Nemani. 2006. Amazon rainforests green-up with sunlight in dry season. Geophysical Research Letters 33(L06405).

Hutyra, L.R., J.W. Munger, C.A. Nobre, S.R. Saleska, S.A. Vieira, and S.C. Wofsy. 2007. Climatic variability and vegetation vulnerability in Amazonia. Geophysical Research Letters 32(L24712): .

Hutyra, L.R., Munger, J.W., Gottlieb, E.W., Daube, B.C., Camargo, P.B., Wofsy, S.C., Controls on energy and carbon exchange in an evergreen tropical rainforest., submitted to Journal of Geophysical Research, Biogeosciences.

Ichii, K., Hashimoto, H., White, M.A., Potter, C., Hutyra, L.R., Huete, A.R., Myneni, R.B., Nemani, R.R., Constraining rooting depths in tropical rainforests using satellite data and ecosystem modeling for accurate simulation of GPP seasonality, Global Change Biology, 13, 67-77, 2007.

Saleska, S.R., S.D. Miller, D.M. Matross, M.L. Goulden, S.C. Wofsy, H.R. da Rocha, P.B. de Camargo, P. Crill, B.C. Daube, H.C. de Freitas, L. Hutyra, M. Keller, V. Kirchhoff, M. Menton, J.W. Munger, E.H. Pyle, A.H. Rice, and H. Silva. 2003. Carbon in amazon forests: Unexpected seasonal fluxes and disturbance-induced losses. Science 302(5650):1554-1557.

Xiao, X.M., Q.Y. Zhang, S. Saleska, L. Hutyra, P. De Camargo, S. Wofsy, S. Frolking, S. Boles, M. Keller, and B. Moore. 2005. Satellite-based modeling of gross primary production in a seasonally moist tropical evergreen forest. Remote Sensing of Environment 94(1):105-122.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

The temperature profile data are reported in one comma separated ASCII text file, km67_temp_profile_2002_2006.txt. The file has been gzipped to reduce file size.



Data File Documentation:







column variable description



1 JDstart(GMT) decimal day (GMT, continuous from 1/1/00)



NOTE 1: Tapajos Forest Local time (LT) = GMT - 4 hours

NOTE 2: these times are time at the BEGINNING of the hour-long

data aggregation interval, i.e., data at 12:00 are from

aggregating measurements between 12:00 and 13:00



2 T.C.filled.57.8m filled temperature estimate for 57.8m (degrees C)

3 T.C.57.8m.est unfilled temperature estimate for 57.8m based on measurements

at 61.94 and 49.75 m (degrees C)

4 T.C.61.94m measured temperature at 61.94m (degrees C)

5 T.C.49.75m measured temperature at 49.75m (degrees C)

6 T.C.39.11m measured temperature at 39.11m (degrees C)

7 T.C.28.41m measured temperature at 28.41m (degrees C)

8 T.C.18.27m measured temperature at 18.27m (degrees C)

9 T.C.10.12m measured temperature at 10.12m (degrees C)

10 T.C.3.05m measured temperature at 3.05m (degrees C)

11 T.C.0.61m measured temperature at 0.61m (degrees C)





Missing value code is NA

Values are comma separated



Sample Data Record:



All of the temperature profile data are reported in km67_temp_profile_2002_2006.txt. The file has been gzippped to reduce file size.





JDstart(GMT),T.C.filled.57.8m,T.C.57.8m.est,T.C.61.94m,T.C.49.75m,T.C.39.11m,T.C.28.41m,



T.C.18.27m,T.C.10.12m,T.C.3.05m,T.C.0.61m



733.75, 29.0789636, 29.0789636, 29.161, 28.92, 29.493, 29.8875, 29.888, 30.052, 29.502, 29.118



733.791666666667, 27.9061862, 27.9061862, 27.9775, 27.768, 28.372, 28.7155, 28.7155, 28.9645, 28.792, 28.6965



733.833333333333, 28.3374836, 28.3374836, 28.4025, 28.2115, 28.6965, 28.964, 28.926, 29.0985, 28.6965, 28.4485



733.875, 28.1601144, 28.1601144, 28.267, 27.953, 28.068, 28.2965, 28.2395, 28.354, 28.03, 27.878



733.916666666667, 28.1023748, 28.1023748, 28.277, 27.764, 27.074, 26.8385, 26.801, 26.8385, 26.8195, 26.8765



733.958333333333, 27.7337442, 27.7337442, 28.011, 27.1965, 25.937, 25.788, 25.8065, 25.975, 25.975, 26.087





Data Application and Derivation:

Temperature profile measurements

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

This data set can be considered final, but as always with data sets this large there are occasional individual points that are bad, but which for one reason or another, have not yet been removed.

Process Description:

Data Acquisition Materials and Methods:

A 64 m tower (Rohn 55G, Peoria, IL) was instrumented for vertical profiles ofair temperature, CO2 and H2O concentrations, and eddy covariance measurements which commenced in April, 2001 and continued until the tower was destroyed when a falling tree hit the guy wires in January 2006.



Air temperature measurements were collected at 8 levels on the tower (61.9, 49.8, 39.1, 28.4, 18.3, 10.1, 2.8, and 0.6 m). Temperature measurements were made with aspirated thermistors (Met One 076B-4 aspiration with YSI 44032 thermistors) and averaged over a 1 hour interval.



Vertical profiles of CO2 and H2O concentrations were measured at 8 levels on the tower (62.2, 50, 39.4, 28.7, 19.6, 10.4, and 0.91 m). Sample air was drawn at 1000 sccm through the 8 profile inlets in sequence (2 minutes at each level). The profile concentration data were used to estimate the change in vertical average concentration between the ground and flux measurement height in order to calculate the column average storage of CO2. The profile IRGA was zeroed between each profile sequence and an absolute calibration at 325, 400, and 475 ppm was made every 6 or 12 hours, as for the eddy CO2 measurements.



A suite of environmental measurements was also made on the tower. Dataloggers (CR-10X, Campbell Scientific, Logan, UT), controlled the overall operation of the system. The data were downloaded via coaxial cable to a computer, housed in a climate controlled hut near the tower.

References:

Hutyra, L.R. 2007. Carbon and water exchange in Amazonian rainforests. Ph.D. Thesis, Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts.



Hutyra, L. R., J. W. Munger, S. R. Saleska, E. Gottlieb, B. C. Daube, A. L. Dunn, D. F. Amaral, P. B. de Camargo, and S. C. Wofsy. 2007. Seasonal controls on the exchange of carbon and water in an Amazonian rain forest, J. Geophys. Res., 112, G03008, doi:10.1029/2006JG000365.



Saleska, S.R., Miller, S.D.,Matross, D.M., Goulden, M.L., Wofsy, S.C., da Rocha,H., de Camargo, P.B., Crill, P., Daube, B.C., de Freitas, H.C., Hutyra, L., Keller, M., Kirchhoff, V., Menton, M., Munger, J.W., Pyle, E.H., Rice, A.H, and Silva, H. 2003. Carbon fluxes in old-growth Amazonian rainforest: seasonality and disturbance-induced net carbon loss, Science, 302, 1554-1557.



Hutyra, L.R., Munger, J.W., Nobre, C.A., Saleska, S.R., Vieira, S.A., and Wofsy, S.C. 2005. Climatic variability and vegetation vulnerability in Amazonia, Geophysical Research Letters, 32, L24712.

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