This data set contains two files (comma-separated-value format). One file provides components of net primary productivity, standing biomass, age and stand structure, and litterfall data for 11 stands of Scots pine (Pinus sylvestris) in the Tomsk Region of Russia (approx. 58 N 83 E). The second file contains data for the same types of variables for three stands of Scots pine in the Irkutsk Region of Siberia (approx. 53 N 103 E).
Field measurements were made in 0.3-0.4 ha forest plots between 1968 and 1974. The forest plots range in age from 25 to 122 years old. Tree biomass was determined from volume and density measurements and selective harvest. Understory and ground cover was harvested in 0.25m2 plots. Root mass has determined from harvested trees and soil monoliths. Wood increment was measured from annual rings. Root production was based on species-specific turnover rates. Leaf litterfall was measured in 0.5-1.0 m2 traps, and branch litterfall was estimated from 4.0 m2 plots.
Revision Notes: The NPP data file has been split into two files, one for the Tomask forests and one for the Irkutsk forests. The data files have been revised to rearrange columns, add a total ANPP column, and correct previously reported data, where needed. Please see the Data Set Revisions section of this document for detailed information.
The Net Primary Productivity (NPP) data collection contains field measurements of biomass, estimated NPP, and climate data for terrestrial grassland, tropical forest, temperate forest, boreal forest, and tundra sites worldwide. Data were compiled from the published literature for intensively studied and well-documented individual field sites and from a number of previously compiled multi-site, multi-biome data sets of georeferenced NPP estimates. The principal compilation effort (Olson et al., 2001) was sponsored by the NASA Terrestrial Ecology Program. For more information, please visit the NPP web site at http://daac.ornl.gov/NPP/npp_home.html.
Cite this data set as follows:
Krankina, O.N. 2013. NPP Boreal Forest: Siberian Scots Pine Forests, Russia, 1968-1974 R[evision]1. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA doi:10.3334/ORNLDAAC/467
This data set was originally published as:
Krankina, O.N. 1999. NPP Boreal Forest: Siberian Scots Pine Forests, Russia, 1968-1974. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA
Project: Net Primary Productivity (NPP)
Forest biophysical data from 11 stands of Scots pine (Pinus sylvestris) in the Tomsk Region of Russia (approx. 58 N 83 E) and from three stands of Scots pine in the Irkutsk Region of Siberia (approx. 53 N 103 E) have been compiled. Scots pine represent one of the main dominant tree species in Siberian forests, growing in stands of relatively high density and productivity.
The data reported previously in Gabeev (1990) were gathered from stands studied under the former USSR International Biological Programme in Tomsk Region, Western Siberia. Above-ground measurements were obtained using standard allometric forestry methods, and below-ground data were originally reported in considerable detail by size class and depth. Data reported previously by Buzykin (1978) are from a study of carbon and nutrient cycling in the forests of the Angara River basin, Irkutsk Region, near Lake Baikal. Here, Scots pine is the dominant tree species on about 26% of the forested area. The three study sites represent the three most common site conditions found in this area.
Trees were measured by standard allometric methods on 0.3-0.4 ha plots. Understory biomass was determined from twenty 0.25 m2 subplots in each plot for three successive years. Data on litterfall are mean values, 1968-1974, and were originally reported separately for needles, bark, branches, cones and other litter. Below-ground biomass was determined by excavation of entire root systems, and root turnover was estimated for different size classes. Both authors have published extensively in the Russian literature.
Components of net primary productivity (NPP) and above- and below-ground standing biomass are available for each stand of P. sylvestris. The range of above-ground biomass was 5,000-32,700 g/m2 (25-163 tC/ha, assuming mean carbon content of 50% for wood and 45% for foliage); below-ground coarse roots ranged between 974 and 6,430 g/m2 (5-32 tC/ha at 50% carbon content). Above-ground NPP (tree ANPP + understory ANPP) averaged 905 g (438 gC)/m2/year and 802 g (390 gC)/m2/year for the Tomsk and Irkutsk studies, respectively; the corresponding mean figures for total NPP (tree ANPP + understory ANPP + BNPP) were 1,018 g (489 gC)/m2/year and 1,732 g (808 gC)/m2/year, respectively. NPP estimates from other sources (e.g., Olson et al., 2012a; b) may vary because different calculation methods were used (Table 1).
Table 1. ANPP, BNPP, and TNPP values reported by various published data sources
| File Name or Description | Data Source(s) | Sub-Site | ANPP | BNPP | TNPP |
|---|---|---|---|---|---|
| gC/m2/yr | |||||
| ssp1_npp_r1.csv | Gabeev (1990)1,2,3 | Tomsk (ssp1a) | 245.25 | 31.05 | 294.3 |
| Tomsk (ssp1b) | 339.3 | 58.5 | 413.1 | ||
| Tomsk (ssp1c) | 326.3 | 40.05 | 384.8 | ||
| Tomsk (ssp1d) | 229.4 | 17.1 | 267.2 | ||
| Tomsk (ssp1e) | 417.25 | 56.7 | 506.35 | ||
| Tomsk (ssp1f) | 523.15 | 70.2 | 635.2 | ||
| Tomsk (ssp1g) | 403.05 | 39.6 | 485.85 | ||
| Tomsk (ssp1h) | 479.25 | 62.55 | 542.7 | ||
| Tomsk (ssp1i) | 674.7 | 86.85 | 811.05 | ||
| Tomsk (ssp1j) | 600.55 | 73.35 | 724.3 | ||
| Tomsk (ssp1k) | 260.3 | 23.85 | 315.2 | ||
| ssp2_npp_r1.csv | Buzykin (1978)1,2,3 | Irkutsk (ssp2a) | 388.2 | 480.1 | 888 |
| Irkutsk (ssp2b) | 329.75 | 495 | 847.7 | ||
| Irkutsk (ssp2c) | 352.65 | 279 | 640.65 | ||
| GPPDI_Class A_NPP_162_R2.csv | Olson et al. (2012a) based on Gabeev (1990)4 | Class A 133 (MI 120) (Tomsk ssp1a) | 245 | -999 | 410 |
| Class A 133 (MI 121) (Tomsk ssp1b) | 339 | -999 | 524 | ||
| Class A 133 (MI 122) Tomsk (ssp1c) | 326 | -999 | 508 | ||
| Class A 133 (MI 123) (Tomsk ssp1d) | 229 | -999 | 391 | ||
| Class A 133 (MI 124) (Tomsk ssp1e) | 417 | -999 | 619 | ||
| Class A 133 (MI 125) (Tomsk ssp1f) | 523 | -999 | 747 | ||
| Class A 133 (MI 126) Tomsk (ssp1g) | 403 | -999 | 602 | ||
| Class A 133 (MI 127) (Tomsk ssp1h) | 479 | -999 | 694 | ||
| Class A 133 (MI 128) (Tomsk ssp1i) | 675 | -999 | 931 | ||
| Class A 133 (MI 129) (Tomsk ssp1j) | 601 | -999 | 841 | ||
| Class A 133 (MI 130) (Tomsk ssp1k) | 260 | -999 | 429 | ||
| GPPDI_Class A_NPP_162_R2.csv | Olson et al. (2012a) based on Buzykin (1978)4 | Class A 124 (MI 110) (Irkutsk ssp2a) | 388 | 480 | 911 |
| Class A 124 (MI 111) (Irkutsk ssp2b) | 330 | 495 | 865 | ||
| Class A 124 (MI 112) (Irkutsk ssp2c) | 353 | 279 | 649 | ||
| EMDI_Class A_NPP_81_R2.csv | Olson et al. (2012b) based on Gabeev (1990)4 | Class A 133 (average of eleven Tomsk forest sites) | 409 | 51 | 599 |
| Olson et al. (2012b) based on Buzykin (1978)4 | Class A 124 (average of three Irkutsk forest sites) | 357 | 418 | 808 | |
| borfornpp1_r1.csv | Gower et al. (2001; 2012) based on Gabeev (1990)4 | Class I Tomsk (a verge of eleven forest sites) | 439 | 51 | 490 |
| Gower et al. (2001; 2012) based on Buzykin (1978)4 | Class I Irkutsk (ssp2a) | 432 | 480 | 912 | |
| Class I Irkutsk (ssp2b) | 370 | 495 | 865 | ||
| Class I Irkutsk (ssp2c) | 370 | 279 | 649 | ||
| borfornpp2_r1.csv | Gower et al. (2001; 2012) based on Gabeev (1990)4,5 | Class I I Tomsk (ssp1a) | 245 | NA | NA |
| Class I I Tomsk (ssp1b) | 339 | NA | NA | ||
| Class I I Tomsk (ssp1c) | 326 | NA | NA | ||
| Class I I Tomsk (ssp1d) | 229 | NA | NA | ||
| Class I I Tomsk (ssp1e) | 417 | NA | NA | ||
| Class I I Tomsk (ssp1f) | 523 | NA | NA | ||
| Class I I Tomsk (ssp1g) | 403 | NA | NA | ||
| Class I I Tomsk (ssp1h) | 479 | NA | NA | ||
| Class I I Tomsk (ssp1i) | 675 | NA | NA | ||
| Class I I Tomsk (ssp1j) | 601 | NA | NA | ||
| Class I I Tomsk (ssp1k) | 260 | NA | NA | ||
Notes: NA = Not available. MI = Measurement identification number.
The differences in NPP values reported in this table are mainly due to differences in calculation methods, as explained in these notes. Please consult original references for details.
Please see the Data Set Revisions
section of this document for detailed information on the revised data sets
(R1, R2, etc.).
1 For this table, NPP data from the original data source were converted from grams of dry weight per meter square per year to grams of carbon per meter square per year using a conversion factor of 0.45 for foliage and roots and 0.5 for woody components.
Original source in Russian translated by O.N. Krankina.
2 ANPP values are tree totals (wood + foliage) and do not include understory ANPP.
3 TNPP estimates include tree ANPP + understory ANPP + BNPP.
4 Original source in Russian. Data computed and compiled by O.N. Krankina.
5 ANPP values are tree totals (wood + foliage) and do not include understory ANPP.
This data set contains two files (comma-separated-value format). One file provides components of net primary productivity, standing biomass, age and stand structure, and litterfall data for 11 stands of Scots pine (Pinus sylvestris) in the Tomsk Region of Russia (approx. 58 N 83 E). The second file contains the same type of variable data for three stands of Scots pine in the Irkutsk Region of Siberia (approx. 53 N 103 E). Field measurements were made between 1968 and 1974 using methods adopted by the Russian participants of the International Biological Programme (IBP).
Spatial Coverage
Site: Siberian Scots Pine
Site Boundaries: (All latitude and longitude given in decimal degrees)
| Site (Region) | Westernmost Longitude | Easternmost Longitude | Northernmost Latitude | Southernmost Latitude | Elevation (m) |
|---|---|---|---|---|---|
| Siberia | 83 | 103 | 58 | 53 | NA |
Site Information
Scots pine (P. sylvestris) is naturally distributed from Scotland to eastern Siberia, and between the boreal and temperate zones as far south as Spain. It is the dominant tree species at both Siberian study sites and is an important boreal species in Siberia; P. sylvestris is the dominant tree on 26% of all the Siberian boreal forests. The Scots pine stands have high density and productivity. The common causes of disturbance in P. sylvestris forests are fire, ice and snow, and pathogenic fungi.
This data set contains forest stand data from 14 plots located in two study areas: Tomsk Region, Western Siberia (Gabeev, 1990) and Angara River basin, in the Irkutsk Region, near Lake Baikal (Buzykin, 1978) (Table 2). The two study areas are referred to as Tomsk and Irkutsk, respectively. The geographic coordinates provided above are approximate. The data was published in the Russian literature; the manuscripts provided good descriptions of the methods used but the description of climate were vague. The climate of both sites is continental and is representative for the southern boreal region.
Table 2. Study site locations
| SITE | NUMBER OF STANDS | STAND AGE (years) | MAP (mm) | LATITUDE | LONGITUDE |
|---|---|---|---|---|---|
| Tomsk Region, Western Siberia | 11 | 25 - 122 | 501.2 | 58 N | 83 E |
| Irkutsk Region, near Lake Baikal (Angara River basin) | 3 | 70 - 95 | NA | 53 N | 103 E |
MAP = Mean annual precipitation. NA = Not available.
Spatial Resolution
The study plots were 0.3-0.4 ha in size. Understory biomass was determined from 0.25 m2 subplots in each plot. Leaf litterfall was collected in litter traps 0.5 to 1.0 m2 in size. Branch litterfall was estimated from 4.0 m2 plots.
Temporal Coverage
Biomass measurements were made over three successive years. Litterfall was collected from 1968 through 1974.
Temporal Resolution
Litterfall data are the average of 3-7 years. Other information not available.
Data File Information
Table 3. Data files in this data set archive
| FILE NAME | TEMPORAL COVERAGE | FILE CONTENTS |
|---|---|---|
| ssp1_npp_r1.csv | 1968/01/01-1974/12/31 | Components of net primary productivity, standing biomass, age and forest structure, and litterfall data for eleven stands of Scots pines in the Tomsk Region of Russia |
| ssp2_npp_r1.csv | Components of net primary productivity, standing biomass, age and forest structure, and litterfall data for three stands of Scots pines in the Irkutsk Region of Siberia |
NPP Data. NPP estimates for the Siberian Scots pines stands are provided in two comma-separated-value (.csv) files (Table 3). Missing values are indicated by "-999.9" or "N/A" (not available) in the case of text fields.
All NPP estimates are based on plant dry matter accumulation, expressed as g/m2/year (dry matter weight) and gC/m2/year (carbon equivalent). Biomass allocation is reported as g/m2 and t/ha (dry matter weight) and gC/m2 and tC/ha (carbon equivalent). To convert dry mass to carbon content, wood and root biomass was multiplied by 0.50, and foliage, understory, and litterfall biomass was multiplied by 0.45.
Sample NPP Data Record
| ,,TREES... ,Stand, ANPP,ANPP,ANP, ANP, ANPP ... ,age,wood,wood,foliage,foliage,tree_total ... Units,yr,g/m2/y,gC/m2/y,g/m2/y,gC/m2/y,gC/m2/y ... Tomsk (ssp1a),25,360,180,145,65.25,245.25 ... Tomsk (ssp1b),49,594,297,94,42.3,339.3 ... Tomsk (ssp1c),70,523,261.5,144,64.8,326.3 ... |
Table 4. Row headings in column 1 in NPP files
| Row Heading in Column 1 | Definition | Units |
|---|---|---|
| Units | Unit of measure | Text |
| Notes | Equations used in calculation of data values | Text |
| Tomsk (ssp1_npp_r1.csv) | Stands in the Tomsk Region of Western Siberia (with sub-site identification) | Text |
| Irkutsk (ssp2_npp_r1.csv) | Stands in the Irkutsk Region, near Lake Baikal in the Angara River basin area of Siberia (with sub-site identification) | Text |
Table 5. Column headings and parameter definitions in NPP files
| COLUMN HEADING | PARAMETER | DEFINITION | UNITS |
|---|---|---|---|
| Stand age (yr) | Age of stand in years | numeric | |
| TREES | ANPP (wood) | Annual above-ground NPP of wood component of trees | g/m2/y gC/m2/yr |
| ANPP (foliage) | Annual above-ground NPP of leaf (needle) component of trees | g/m2/yr gC/m2/yr | |
| ANPP (tree_total) | Total annual above-ground NPP of trees | gC/m2/yr | |
| UNDERSTORY | ANPP | Annual above-ground NPP of understory | g/m2/yr gC/m2/yr |
| ALL | BNPP | Annual below-ground NPP of trees and understory | g/m2/yr gC/m2/yr |
| ALL | TNPP | Total annual NPP (trees + understory + roots) | gC/m2/yr |
| AGBiomass (wood) | Above-ground biomass of tree wood component | t/ha tC/ha |
|
| AGBiomass (foliage) | Above-ground biomass of tree leaf (needle) component | t/ha tC/ha |
|
| AGBiomass (total | Total above-ground biomass (trees + foliage) | t/ha tC/ha |
|
| BGBiomass (total) | Total below-ground biomass | tC/ha gC/m2 |
|
| Ground cover | Ground cover biomass | NA | |
| Dead wood | Dead wood biomass | NA | |
| litter | Litter biomass (average of 3-7 years) | tC/ha gC/m2 |
|
| trees/ha | Stand density | trees/ha | |
| Basal_area | Basal area of stand | m2/ha | |
| growingstock | Tree volume | m3/ha | |
| Site Class | Site Class I fication1 | text | |
| Litterfall | Annual leaf plus branch litterfall rate (average of 3-7 years) | g/m2/yr gC/m2/yr |
|
| Needle litterfall | Annual leaf litterfall rate (average of 3-7 years) | g/m2/yr | |
| Litterfall nitrogen | Annual concentration of nitrogen in litterfall (average of 3-7 years) | g/m2/yr | |
| Understory comments | Dominant species or note about species richness | text | |
| References | Primary data source | text |
The accumulation of biomass, or NPP, is the net gain of carbon by photosynthesis that remains after plant respiration. While there are many fates for this carbon, this data set accounts for above- and below-ground growth. NPP was estimated using methods adopted by the Russian participants of the International Biological Programme (IBP).
The biomass dynamics data for the Siberian Scots Pine site are provided for comparison with models and estimation of NPP.
Annual total NPP for a few of the Siberian Scots Pine study sites was within the ranges of mature stands of P. banksiana and P. contorta found within the cool, sometimes dry climates of North America (i.e., 200-300 gC/m2/yr) whereas total NPP for many of the other Siberian study sites was higher (315-888 g C/m2/yr). The lower NPP values were found in the youngest (25 years) and oldest (122 years) stands whereas the higher values were found in stands 31 to 95 years of age. The values for the more productive stands approached values for 50-year-old P. sylvestris in Great Britain (Cousens, 1974) but were lower than total NPP for P. sylvestris at Jadraas, Sweden (Linder and Agren, 2011). Gower et al. (1994) found that peak NPP values are reached at >60 years for naturally regenerated P. contorta stands, after which there is a gradual decline.
Annual litterfall rates in the Siberian Scots Pine study sites were well below annual values found in a 68-year-old P. sylvestris forest in Russia (Basov, 1987) but higher than annual leaf fall in a 100-year-old P. contorta forest in the Rocky Mountains, USA (Fahey, 1983).
Sources of Error
Information not available.
NPP was estimated using methods adopted by the Russian participants of the International Biological Programme (IBP). The three plots at Irkutsk range in size from 0.3 to 0.4 ha. Tree stem biomass was determined from volume and density measurements. Components of the crown (small and large branches, foliage of current year and older foliage, and cones) for each species were measured on three to six medium-size trees that were destructively sampled. The mass of groundcover/understory was measured on 20 0.25-m2 subplots in each plot. Coarse root mass was determined by excavating root systems of sampled trees, and fine root mass was estimated from soil monoliths. Roots were separated into five diameter classes ranging from <0.5 mm to >5 mm. Wood increment was calculated from measurement of annual rings at different heights along the stem. The production of branches was calculated as a sum of current year shoots and increment of older branches. The production of roots was calculated for each size class from species-specific turnover rates (Orlov, 1967). Leaf litterfall was measured in 10 litter traps (0.5-1.0 m2), and branch litterfall was estimated from two 4.0 m2 plots. Litterfall data reported in this data set are the average for 3-7 years. Tree mortality was determined by plot remeasurements 9 years after the plots were set up.
The methods used to estimate biomass and NPP at Tomsk plots were similar to those described for Irkutsk, except root production was estimated as a constant proportion of fine root mass plus the roots removed by tree mortality based on unavailable references. The understory production was estimated as a non-site-specific fraction of understory species biomass (Gabeev, 1990).
All NPP estimates are based on plant dry matter accumulation, expressed as g/m2/year (dry matter weight) and gC/m2/year (carbon equivalent). Biomass allocation is reported as g/m2 and t/ha (dry matter weight) and gC/m2 and tC/ha (carbon equivalent). To convert dry mass to carbon content, wood and root biomass was multiplied by 0.50, and foliage, understory, and litterfall biomass was multiplied by 0.45.
This data is available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).
Contact for Data Center Access Information:
E-mail: uso@daac.ornl.gov
Telephone: +1 (865) 241-3952
Alexeyev, V.A., and R.A. Birdsey. 1994. Carbon in Ecosystems of Forests and Peatlands of Russia. Sukachev Institute for Forest Research, Siberian Division of the Russian Academy of Sciences, Krasnoyarsk/ North Eastern Forest Experiment Station, USDA Forest Service.
Bazilevich, N. I. 1993. Biological Productivity of Ecosystems of Northern Eurasia. Nauka Publishers, Moscow (in Russian).
Buzykin, A. I. 1978. Productivity of Pine Forests. Nauka Publishers, Moscow (in Russian).
Gabeev, V. N. 1990. Ecology and Productivity of Pine Forests. Nauka Publishers, Novosibirsk, Russia (in Russian).
Olson, R.J., K.R. Johnson, D.L. Zheng, and J.M.O. Scurlock. 2001. Global and Regional Ecosystem Modeling: Databases of Model Drivers and Validation Measurements. ORNL Technical Memorandum TM-2001/196. Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
Additional Sources of Information:
Basov, V.G. 1987. Litter dynamics in pine biogeocenoses in the steppe zone. Sov. J. Ecol. 18: 288-293.
Cousens, J. 1974. An Introduction to Woodland Ecology. Oliver and Boyd, Edinburgh, UK.
Fahey, T.J. 1983. Nutrient dynamics of aboveground detritus in lodgepole pine ecosystems, southeastern Wyoming. Ecol. Monogr. 53: 51-72.
Gower, S.T., H.L. Gholz, K. Nakane, and V.C. Baldwin. 1994. Production and carbon allocation patterns in pine forests, 115-135. IN: H.L. Gholz (ed). Environmental Constraints on the Structure and Productivity of Pine Forest Ecosystems: A Comparative Analysis. Ecological bulletins, 43. 198 pp. København : Munksgaard.
Gower, S.T., O. Krankina, R.J. Olson, M. Apps, S. Linder, and C. Wang. 2001. Net primary production and carbon allocation patterns of boreal forest ecosystems. Ecological Applications. 11:1395-1411.
Gower, S.T., O. Krankina, R.J. Olson, M. Apps, S. Linder, and C. Wang. 2012. NPP Boreal Forest: Consistent Worldwide Site Estimates, 1965-1995, R[evision]1. Data set. Available on-line [http://daac.ornl.gov] from the Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA doi:10.3334/ORNLDAAC/611
Linder, S., and G. I. Agren. 2011. NPP Boreal Forest: Jadraas, Sweden, 1973-1983, R[evision]1. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA doi:10.3334/ORNLDAAC/202
Olson, R.J., J.M.O. Scurlock, S.D. Prince, D.L. Zheng, and K.R. Johnson (eds.). 2012a. NPP Multi-Biome: Global Primary Production Data Initiative Products, R2. Data set. Available on-line [http://daac.ornl.gov] from the Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA doi:10.3334/ORNLDAAC/617
Olson, R.J., J.M.O. Scurlock, S.D. Prince, D.L. Zheng, and K.R. Johnson (eds.). 2012b. NPP Multi-Biome: NPP and Driver Data for Ecosystem Model-Data Intercomparison, R2. Data set. Available on-line [http://daac.ornl.gov] from the Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA doi:10.3334/ORNLDAAC/615
Orlov, A. Y. 1967. Method of measurement of root mass in forest soil. Lesovedenije 1: 64-70 (in Russian).
Revision Summary:
The NPP data file, ssp_xls.bin, has been converted to text common-separated-value (.csv) format and split into two files, one for the Tomask Scots pine forest plots (ssp1_npp_r1.csv) and one for the Irkutsk Scots pine forest plots (ssp2_npp_r1.csv). The data files have been revised to rearrange columns, add columns of data, add sub-site identifications, and correct some previously reported data, where needed.
In the NPP data file, spp1_npp _r1.txt (Tomsk), the column for stand age was moved from column AF to column B and a column for All ANPP (tree wood + tree foliage + understory) was added. In the NPP data file, spp2_npp _r1.txt (Irkutsk), the column for stand age was moved from column AF to column B, a column for All ANPP (tree wood + tree foliage + understory) was added, and previous under estimates of understory ANPP and total NPP were revised.
All other values in the data files are consistent with published sources.
Data File Changes:
Understory ANPP estimates in ssp2_npp _r1.txt have been corrected to agree with values in Table 4 of Gower et al. (2001) and Gower et al. (2012).
| Understory ANPP | ||||
|---|---|---|---|---|
| Site (and Sub-site) | Uncorrected in spp_xls.bin | Corrected in ssp2_npp_r1.csv | Uncorrected in spp_xls.bin | Corrected in ssp2_npp_r1.csv |
| g/m2/yr | gC/m2/yr | |||
| Irkutsk (ssp2a) | 44 | 97 | 19.8 | 43 |
| Irkutsk (ssp2b) | 51 | 90 | 22.95 | 40 |
| Irkutsk (ssp2c) | 20 | 38 | 9 | 17 |
ALL ANPP estimates have been added and total NPP values have been revised in ssp2_npp _r1.txt to agree with values in Table 4 of Gower et al. (2001) and Gower et al. (2012).
| ALL ANPP (tree ANPP + understory ANPP) | ALL TNPP (tree ANPP + understory ANPP + ALL BNPP) | |||
|---|---|---|---|---|
| Site (and Sub-site) | Uncorrected in spp_xls.bin | Corrected in ssp2_npp_r1.csv | Uncorrected in spp_xls.bin | Corrected in ssp2_npp_r1.csv |
| gC/m2/yr | gC/m2/yr | |||
| Irkutsk (ssp2a) | NR | 431.2 | 888 | 911.3 |
| Irkutsk (ssp2b) | NR | 369.75 | 847.7 | 864.75 |
| Irkutsk (ssp2c) | NR | 369.65 | 640.65 | 648.65 |
NR = Not Reported.
The data values in ssp1_npp_r1.csv and ssp2_npp_r1.csv are now correct.
Data User Action: If you downloaded the referenced data set from the ORNL DAAC on-line archive before July 15, 2013, you should download it again from the ORNL DAAC.
Revision History:
Original Citation
Krankina, O.N. 1999. NPP Boreal Forest: Siberian Scots Pine Forests, Russia, 1968-1974. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA