Interannual Variability in Global Soil Respiration on a 0.5 Degree Grid Cell Basis (1980-1994), CDIAC/NDP-081
Entry ID: CDIAC_NDP-081

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Summary
Abstract: [Summary adopted from NDP-081 documentation]

We used a climate-driven regression model to develop spatially
resolved estimates of soil-CO2 emissions from the terrestrial land
surface for each month from January 1980 to December 1994, to evaluate
the effects of interannual variations in climate on global
soil-to-atmosphere CO2 fluxes. The mean annual global soil-CO2 flux
over this 15-y period was estimated to be 80.4 (range 79.3-81.8) Pg
C. Monthly variations in global soil-CO2 emissions followed closely
the mean temperature cycle of the Northern Hemisphere. Globally,
soil-CO2 emissions reached their minima in February and peaked in July
and August. Tropical and subtropical evergreen broad-leaved forests
contributed more soil-derived CO2 to the atmosphere than did any other
vegetation type (~30% of the total) and exhibited a biannual cycle in
their emissions. Soil-CO2 emissions in other biomes exhibited a single
annual cycle that paralleled the seasonal temperature
cycle. Interannual variability in estimated global soil-CO2 production
is substantially less than is variability in net carbon uptake by
plants (i.e., net primary productivity). Thus, soils appear to buffer
atmospheric CO2 concentrations against far more dramatic seasonal and
interannual differences in plant growth. Within seasonally dry biomes
(savannas, bushlands, and deserts), interannual variability in
soil-CO2 emmissions correlated significantly with interannual
differences in precipitation. At the global scale, however, annual
soil-CO2 fluxes correlated with mean annual temperature, with a slope
of 3.3 PgCY-1 per degree Celsius. Although the distribution of
precipitation influences seasonal and spatial patterns of soil-CO2
emissions, global warming is likely to stimulate CO2 emissions from
soils.

The authors estimated the seasonal and spatial distribution of global
soil-CO2 emissions following the regression based modeling approach of
Raich and Potter (1995). This database, therefore, contains global,
spatially explicit (0.5-degree grid cells) and temporally explicit
model output of soil-CO2 emissions. The calculated emissions include
the respiration of both soil organisms and plant roots. Please note
that NDP-081 is an update to DB1015
("http://cdiac.ornl.gov/ftp/db1015/"). Specifically, DB1015 used
long-term climate data as model input while NDP-081 utilizes new
climate and land cover data files. Please refer to Raich et al. 2002,
(provided with permission from Blackwell Science Ltd.) for more
information ("http://cdiac.esd.ornl.gov/epubs/ndp/ndp081/GCB2002.pdf")

Related URL
Link: GET DATA
Description: Access to the NDP-081 data and documentation


Link: GET DATA
Description: FTP directory of DB1015 data files and documentation


Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: James W. Raich, Christopher S. Potter, Dwipen Bhagawati
Dataset Title: Interannual Variability in Global Soil Respiration on a 0.5 Degree Grid Cell Basis (1980-1994)
Dataset Series Name: Numerical Data Package
Dataset Release Date: August 2003
Dataset Release Place: Oak Ridge, TN
Dataset Publisher: Carbon Dioxide Information Analysis Center
Issue Identification: NDP-081
Online Resource: http://cdiac.esd.ornl.gov/epubs/ndp/ndp081/ndp081.html


Temporal Coverage
Start Date: 1980-01-01
Stop Date: 1994-12-31


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Data Resolution
Latitude Resolution: 0.5 degree
Longitude Resolution: 0.5 degree
Temporal Resolution: daily, monthly, annual


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >EVAPOTRANSPIRATION >POTENTIAL EVAPOTRANSPIRATION    [Definition]
ATMOSPHERE >PRECIPITATION >PRECIPITATION AMOUNT    [Definition]
BIOSPHERE >VEGETATION >VEGETATION COVER    [Definition]
LAND SURFACE >LAND TEMPERATURE >LAND SURFACE TEMPERATURE    [Definition]
LAND SURFACE >SOILS >NITROGEN    [Definition]
LAND SURFACE >SOILS >ORGANIC MATTER >ORGANIC CARBON    [Definition]
LAND SURFACE >SOILS >SOIL CHEMISTRY >CARBON DIOXIDE EMISSIONS    [Definition]
LAND SURFACE >SOILS >SOIL MOISTURE/WATER CONTENT    [Definition]
LAND SURFACE >SOILS >SOIL RESPIRATION    [Definition]
LAND SURFACE >SOILS >SOIL TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >CARBON AND HYDROCARBON COMPOUNDS >CARBON DIOXIDE    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >ECOSYSTEM FUNCTIONS >BIOGEOCHEMICAL CYCLES    [Definition]


ISO Topic Category
BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION


Quality
QA performed by CDIAC One of the roles of the Carbon Dioxide
Information Analysis Center (CDIAC) is quality assurance (QA) of
data. The QA process is an important component of the value-added
concept of assuring accurate, usable information for researchers,
because data received by CDIAC are rarely in condition for immediate
distribution, regardless of source.


Keywords
CARBON DIOXIDE FLUX
CDIAC
DB1015
ORGANIC CARBON
POTENTIAL EVAPOTRANSPIRATION
SOIL CO2 EMISSIONS
SOIL EMISSION
carbon cycle
TEMS
GTOS
G3OS


Data Set Progress
COMPLETE


Originating Center
CDIAC


Data Center
Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy    [Information]
Data Center URL: http://cdiac.ornl.gov/
Dataset ID: NDP-081

Data Center Personnel
Name: CARBON DIOXIDE INFORMATION ANALYSIS CENTER
Fax: (865) 574-2232
Contact Address:
Carbon Dioxide Information Analysis Center (CDIAC)
Oak Ridge National Laboratory
P.O.. Box 2008
City: OAK RIDGE
Province or State: TENNESSEE
Postal Code: 37831-6335
Country: USA



Distribution
Distribution_Media: online ftp, www
Distribution_Format: netCDF, ARC/INFO, GIF,
Fees: none


Personnel
GENE R. MAJOR
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov


CHRISTOPHER S. POTTER
Role: INVESTIGATOR
Phone: 650-604-6164
Fax: 650-604-4680
Email: Christopher.S.Potter at nasa.gov
Contact Address:
NASA Ames Research Center
Ecosystem Science and Technology Program
Mail Stop 242-4
City: Moffett Field
Province or State: CA
Postal Code: 94035
Country: USA


JAMES W. RAICH
Role: INVESTIGATOR
Email: jraich at iastate.edu
Contact Address:
Department of Botany
Iowa State University
City: Ames
Province or State: IA
Postal Code: 50011
Country: USA


DWIPEN BHAGAWATI
Role: INVESTIGATOR
Contact Address:
Department of Civil and Construction Engineering
Iowa State University
City: Ames
Province or State: IA
Postal Code: 50011
Country: USA


Publications/References
DeFries, R.S, M. Hansen, J.R.G. Townshend, and
R. Sohlberg. 1998. Global land cover classifications at 8 km spatial
resolution: the use of training data derived from landsat imagery in
decision tree classifiers. International Journal of Remote Sensing
19:3141-3168.

Raich, J.W. and C.S. Potter and D. Bhagawati. 2002. Interannual
variability in global soil respiration, 1980-1994. Global Change
Biology 8:800-812.
http://cdiac.esd.ornl.gov/epubs/ndp/ndp081/GCB2002.pdf

Raich, J. W. and C. S. Potter. 1995. Global patterns of carbon dioxide
emissions from soils. Global Biogeochemical Cycles 9(1)23-36.

Raich, J.W. and C.S. Potter. 1995. Global patterns of carbon dioxide
emissions from soils on a 0.5 degree grid cell basis. DB1015. Carbon
Dioxide Information Analysis Center, U.S. Department of Energy, Oak
Ridge National Laboratory, Oak Ridge, TN, U.S.A.
http://cdiac.ornl.gov/ftp/db1015/

Creation and Review Dates
DIF Creation Date: 2003-09-10
Last DIF Revision Date: 2009-04-20

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