Greenhouse gas emissions and removals from forest land, woodlands, and urban trees in the United States, 1990-2019: Estimates and quantitative uncertainty for individual states

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Walters, Brian F.
Originator: Domke, Grant M.
Originator: Nowak, David J.
Originator: Smith, James E.
Originator: Ogle, Stephen M.
Publication_Date: 2021
Title:
Greenhouse gas emissions and removals from forest land, woodlands, and urban trees in the United States, 1990-2019: Estimates and quantitative uncertainty for individual states
Geospatial_Data_Presentation_Form: spreadsheet
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2021-0035
Description:
Abstract:
As a signatory to the United Nations Framework Convention on Climate Change (UNFCCC), the United States has been reporting an economy-wide inventory of greenhouse gas (GHG) emissions and removals since the mid-1990s (US EPA 2021). Estimates of GHG emissions and removals from forest land, land converted to and from forest land, woodlands in the grassland category, and urban trees in settlements are compiled by U.S. Department of Agriculture (USDA) Forest Service researchers and are based primarily on national forest inventory (NFI) data collected and maintained by the Forest Inventory and Analysis (FIA) program within the USDA Forest Service. The state-level estimates of GHG emissions and removals provided in this publication are based on the compilation reported in the Land Use, Land-Use Change, and Forestry chapter of the US EPA (2021) submission to the UNFCCC. Included in this package are 15 comma-delimited ASCII text files of estimates (9 of net carbon or CO₂ flux estimates, 2 of carbon stock estimates, 3 of non-CO₂ emissions, and 1 of area estimates of land use and land use change) and 2 files of quantitative uncertainties. All the estimates/uncertainties are the same as those found in Appendix 1 and 2 from “Greenhouse Gas Emissions and Removals from Forest Land, Woodlands, and Urban Trees in the United States, 1990-2019” (Domke et al. 2021).
Purpose:
These estimates are being provided in this format to make them more accessible for use in sub-national reporting or further analysis.
Supplemental_Information:
Appendix 1 and 2 from “Greenhouse Gas Emissions and Removals from Forest Land, Woodlands, and Urban Trees in the United States, 1990-2019” (Domke et al. 2021) are formatted versions of the estimates in this package by state with footnotes that provide table-specific details.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1990
Ending_Date: 2020
Currentness_Reference:
Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent:
Conterminous United States, Hawaii, and Alaska
Bounding_Coordinates:
West_Bounding_Coordinate: 172.00000
East_Bounding_Coordinate: -66.00000
North_Bounding_Coordinate: 72.00000
South_Bounding_Coordinate: 18.00000
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme_Keyword: environment
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Climate change
Theme_Keyword: Carbon
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Fire
Theme_Keyword: Inventory, Monitoring, & Analysis
Theme_Keyword: Monitoring
Theme_Keyword: Resource inventory
Theme_Keyword: Natural Resource Management & Use
Theme_Keyword: Ecosystem services
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: greenhouse gas
Theme_Keyword: emissions and removals
Theme_Keyword: carbon stocks
Theme_Keyword: carbon net flux
Theme_Keyword: forest carbon
Theme_Keyword: woodland carbon
Theme_Keyword: land use
Theme_Keyword: land use change
Theme_Keyword: drained organic soils
Theme_Keyword: settlement trees
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: conterminous United States
Place_Keyword: Hawaii
Place_Keyword: Alaska
Access_Constraints: None
Use_Constraints:
These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Walters, Brian F.; Domke, Grant M.; Nowak, David J.; Smith, James E.; Ogle, Stephen M. 2021. Greenhouse gas emissions and removals from forest land, woodlands, and urban trees in the United States, 1990-2019: Estimates and quantitative uncertainty for individual states. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2021-0035
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Walters
Contact_Organization: USDA Forest Service, Northern Research Station, Forest Inventory and Analysis Program
Contact_Position: Forester
Contact_Address:
Address_Type: mailing and physical
Address: 1992 Folwell Ave.
City: St. Paul
State_or_Province: MN
Postal_Code: 55108
Country: USA
Contact_Voice_Telephone: 651-649-5135
Contact_Electronic_Mail_Address: brian.f.walters@usda.gov
Data_Set_Credit:
This project was funded by the USDA Forest Service, Forest Inventory and Analysis Program as well as U.S. Environmental Protection Agency Climate Change Division
Cross_Reference:
Citation_Information:
Originator: U.S. Environmental Protection Agency [US EPA]
Publication_Date: 2021
Title:
Inventory of U.S. greenhouse gas emissions and sinks: 1990-2019
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: EPA
Issue_Identification: 430-R-21-005
Publication_Information:
Publication_Place: Washington, DC
Publisher: U.S. Environmental Protection Agency
Other_Citation_Details:
(accessed 14 April 2021)
Online_Linkage: https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2019
Cross_Reference:
Citation_Information:
Originator: Domke, Grant M.
Originator: Walters, Brian F.
Originator: Nowak, David J.
Originator: Smith, James, E.
Originator: Nichols, Michael C.
Originator: Ogle, Stephen M.
Originator: Coulston, John W.
Originator: Wirth, Tom C.
Publication_Date: 2021
Title:
Greenhouse gas emissions and removals from forest land, woodlands, and urban trees in the United States, 1990-2019
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Resource Update
Issue_Identification: FS-RU-307
Publication_Information:
Publication_Place: Madison, WI
Publisher: U.S. Department of Agriculture, Forest Service, Northern Research Station
Other_Citation_Details:
5 p. [plus 2 appendices]
Online_Linkage: https://doi.org/10.2737/FS-RU-307
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The methods and models used to compile these estimates use Intergovernmental Panel on Climate Change (IPCC) good practices for national greenhouse gas inventories (IPCC 2006).
Logical_Consistency_Report:
The data are logically consistent. The consistency was verified as part of the quality assurance that occurred during data analysis.
Completeness_Report:
Data are left blank if there were no observations.

Estimates of net flux, non-CO₂ emissions, and land areas are provided through 2019. Estimates of carbon stocks are provided through 2020.

Managed forest land for U.S. Territories is not currently included in Section 6.1 Representation of the U.S. Land Base of the “Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2019” (US EPA 2021), therefore U.S. Territories are not included here.

There is not sufficient Forest Inventory and Analysis data to include estimates of forest ecosystem carbon (C) stocks, C stock changes, or non-CO₂ emissions for the state of Hawaii at this time.

Area estimates for some land use categories were not updated in the Land Representation in the current Inventory (US EPA 2021) so there are differences in the area estimates reported in this package and those reported in Section 6.1 Representation of the U.S. Land Base in the US EPA inventory report (2021).

Estimates for each state may not be available for every table. This may be due to the resolution of the available data, a lack of observations of the particular land use category or land use conversion category, or there was insufficient data.

The state-level estimates reported in the following tables will not sum to the national total due to independent rounding.

The forest ecosystem C stocks and stock changes on Forest Land Remaining Forest Land, Land Converted to Forest Land, and Forest Land Converted to Land do not include trees on non-forest land (e.g., agroforestry systems and settlement areas).

Negative values indicate net C uptake (i.e., a net removal of C from the atmosphere).
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
Carbon (C) stocks and net flux on Forest Land Remaining Forest Land, Woodlands Remaining Woodlands, Land Converted to Forest Land, and Forest Land Converted to Land; Area of Land Use and Land Use Change of the Managed Land Base:
Estimates of ecosystem C and areas of land use/land use change are based on data from the network of annual national forest inventory (NFI) plots established and measured by the Forest Inventory and Analysis (FIA) program within the USDA Forest Service; either direct measurements or variables from the NFI are the basis for estimating metric tons of C per hectare in forest ecosystem C pools (i.e., above- and belowground biomass, dead wood, litter, and soil carbon) and area of land use categories. Field data collection and data compilation/estimation were done using established FIA protocols. FIA data as well as a library of field guides and database documentation are available online (USDA Forest Service 2020a, USDA Forest Service 2020b, USDA Forest Service 2020c).

For the conterminous U.S., FIA plot-level estimates are used to inform land area (by use) and stand age transition matrices across time which can be summed annually for an estimate of forest C stock change for Forest Land Remaining Forest Land, Land Converted to Forest Land, and Forest Land Converted to Land. A gain-loss approach was used to compile estimates in Alaska. See Annex 3.13 in “Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2019" (US EPA 2021) for detailed methods descriptions and citations for specific methods and models.

Non-carbon dioxide (CO₂) emissions from forest fires:
The estimated emissions from forest fires are based on IPCC (2006) methodology, which includes a combination of U.S.-specific data on forest area burned and fire severity (MTBS Data Summaries 2018), potential fuel available based on FIA plot measurements, and IPCC default emission factors and some combustion factors. Emissions were calculated following IPCC (2006) methodology, according to equation 2.27 of IPCC (2006, Volume 4, 16 Chapter 2). See Annex 3.13 in US EPA (2021) for detailed methods descriptions and citations for specific methods and models.

Non-carbon dioxide (CO₂) emissions from drained organic soils:
The estimated emissions from drained organic soils on forest lands follow IPCC (2006) methodology, which includes quantifying the area of forest land on drained organic soils using FIA plot measurements and using default estimates of emissions provided in the 2013 supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands (IPCC 2014). See the subsection CO₂, methane (CH₄), and nitrous oxide (N₂O) Emissions from Drained Organic Soils under section Forest Land Remaining Forest Land in the Land Use, Land-Use Change, and Forestry chapter (chapter 6) in US EPA (2021) for detailed methods descriptions and citations for specific methods and models.

Net flux in settlement trees:
Estimates of net C flux from trees in Settlements Remaining Settlements are compiled with an analysis of the per unit area of tree cover. Three types of data are required: the settlement area, percent tree cover in the settlement area, and the carbon sequestration density per unit area of tree cover. See the section on Settlements Remaining Settlements in the Land Use, Land-Use Change, and Forestry chapter (chapter 6) in US EPA (2021) for detailed methods descriptions and citations for specific methods and models.

Quantitative Uncertainty
The uncertainty range of carbon flux estimates were predicted through a combination of sample-based and model-based uncertainty for a 95 percent confidence interval, IPCC Approach 1 (IPCC 2006). The uncertainty range of non-CO₂ emissions from forest fires were predicted by Monte Carlo Stochastic Simulation for a 95 percent confidence interval, IPCC Approach 2 (IPCC 2006). See Annex 3.13 in US EPA (2021) for detailed methods descriptions and citations for specific methods and models.
Methodology_Citation:
Citation_Information:
Originator: U.S. Environmental Protection Agency [US EPA]
Publication_Date: 2021
Title:
Inventory of U.S. greenhouse gas emissions and sinks: 1990-2019
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: EPA
Issue_Identification: 430-R-21-005
Publication_Information:
Publication_Place: Washington, DC
Publisher: U.S. Environmental Protection Agency
Other_Citation_Details:
(accessed 14 April 2021)
Online_Linkage: https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2019
Methodology_Citation:
Citation_Information:
Originator: Domke, Grant M.
Originator: Walters, Brian F.
Originator: Nowak, David J.
Originator: Smith, James, E.
Originator: Nichols, Michael C.
Originator: Ogle, Stephen M.
Originator: Coulston, John W.
Originator: Wirth, Tom C.
Publication_Date: 2021
Title:
Greenhouse gas emissions and removals from forest land, woodlands, and urban trees in the United States, 1990-2019
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Resource Update
Issue_Identification: FS-RU-307
Publication_Information:
Publication_Place: Madison, WI
Publisher: U.S. Department of Agriculture, Forest Service, Northern Research Station
Other_Citation_Details:
5 p. [plus 2 appendices]
Online_Linkage: https://doi.org/10.2737/FS-RU-307
Methodology_Citation:
Citation_Information:
Originator: Eggleston, H. S.
Originator: Buendia, L.
Originator: Miwa, K.
Originator: Ngara, T.
Originator: Tanabe, K.
Publication_Date: 2006
Title:
2006 IPCC guidelines for national greenhouse gas inventories
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Hayama, Kanagawa, Japan
Publisher: IPCC National Greenhouse Gas Inventories Programme, Intergovernmental Panel on Climate Change (IPCC)
Methodology_Citation:
Citation_Information:
Originator: Hiraishi, T.
Originator: Krug, T.
Originator: Tanabe, K.
Originator: Srivastava, N.
Originator: Baasansuren, J.
Originator: Fukuda, M.
Originator: Troxler, T. G.
Publication_Date: 2014
Title:
2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Switzerland
Publisher: Intergovernmental Panel on Climate Change (IPCC)
Source_Information:
Source_Citation:
Citation_Information:
Originator: USDA Forest Service
Publication_Date: 2020
Title:
Forest Inventory and Analysis National Program: FIA Data Mart
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: U.S. Department of Agriculture, Forest Service
Other_Citation_Details:
USDA Forest Service 2020a; [Accessed on 1 April 2021]
Online_Linkage: https://apps.fs.usda.gov/fia/datamart/datamart.html
Online_Linkage: https://doi.org/10.2737/RDS-2001-FIADB
Type_of_Source_Media: Online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2020
Source_Currentness_Reference:
Publication Date
Source_Information:
Source_Citation:
Citation_Information:
Originator: USDA Forest Service
Publication_Date: 2020
Title:
Forest Inventory and Analysis National Program, FIA library: Field Guides, Methods and Procedures
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: U.S. Department of Agriculture, Forest Service
Other_Citation_Details:
USDA Forest Service 2020b; [Accessed on 31 March 2021]
Online_Linkage: https://www.fia.fs.fed.us/library/field-guides-methods-proc/
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2020
Source_Currentness_Reference:
Publication Date
Source_Information:
Source_Citation:
Citation_Information:
Originator: USDA Forest Service
Publication_Date: 2020
Title:
Forest Inventory and Analysis National Program, FIA library: Database Documentation
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Washington D.C., U.S.A.
Publisher: U.S. Department of Agriculture, Forest Service
Other_Citation_Details:
USDA Forest Service 2020c; [Accessed on 1 April 2021]
Online_Linkage: https://www.fia.fs.fed.us/library/database-documentation/index.php
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2020
Source_Currentness_Reference:
Publication Date
Source_Information:
Source_Citation:
Citation_Information:
Originator: MTBS Data Summaries
Publication_Date: 2018
Title:
MTBS Data Access: Fire Level Geospatial Data
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publisher: MTBS Project (USDA Forest Service/U.S. Geological Survey)
Other_Citation_Details:
[Accessed 1 April 2021]
Online_Linkage: http://mtbs.gov/direct-download
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2018
Source_Currentness_Reference:
Publication Date
Process_Step:
Process_Description:
See methods section above
Process_Date: Unknown
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Below you will find a list and description of the files (20) included in this publication. These data are provided as a single Microsoft Excel Open XML spreadsheet file (XLSX), but also as individual comma-delimited ASCII text files (CSV).

ABBREVIATIONS USED
MMT C = million metric tons of carbon
MMT CO₂ eq. = million metric tons of carbon dioxide equivalent
kt = kiloton

DATA IN SPREADSHEET FORMAT (1)
1. \Data\XLSX\US_GHG_emissions_removals_from_forest_woodlands_urban_trees_1990_2019.xlsx: Microsoft Excel Open XML spreadsheet file containing state-level estimates of GHG emissions and removals based on the compilation reported in the Land Use, Land-Use Change, and Forestry chapter of the US EPA (2021) submission to the UNFCCC. This file contains 19 worksheets (tables). The worksheets (tables) containing data are also provided as individual CSV files and are described in detail below.


SUMMARY INFORMATION (2)
2. \Data\README.pdf: Portable Document Format file containing a description of the estimates package with notes pertaining to all tables.

3. \Data\Table_Contents_and_Notes.pdf: Portable Document Format file containing a table of contents which includes the table caption and table-specific notes.


DOS* (1)
4. \Data\CSV\DOS_nonCO2_CO2eq.csv: Non-CO₂ Emissions from Drained Organic Forest Soils (MMT CO₂ Eq.)

Variables included in this table:

State = name of state

Source = gases emitted from drained organic soils where CH4 = methane, N2O = nitrous oxide, and Total = the sum of emissions from each of the gasses

*YEAR* = estimate for specified YEAR (1990-2019)


FCL* AND LCF* (4)
5. \Data\CSV\FCL_flux_CO2eq.csv: Net CO₂ Flux from Forest C Pools in Forest Land Converted to Land by Land Use Change Category (MMT CO₂ Eq.)
6. \Data\CSV\FCL_flux_MMTC.csv: Net C Flux from Forest C Pools in Forest Land Converted to Land by Land Use Change Category (MMT C)
7. \Data\CSV\LCF_flux_CO2eq.csv: Net CO₂ Flux from Forest C Pools in Land Converted to Forest Land by Land Use Change Category (MMT CO₂ Eq.)
8. \Data\CSV\LCF_flux_MMTC.csv: Net C Flux from Forest C Pools in Land Converted to Forest Land by Land Use Change Category (MMT C)

Variables included in these tables:

State = name of state

Land Use Conversion and Land Use/Carbon Pool = These two columns work in tandem to define the land conversion net flux estimates. The estimate may be for a single carbon pool (as described below for the FRF* and WRW* tables) on a land use conversion category (e.g., Land Use Conversion = “Cropland Converted to Forest Land” and Land Use/Carbon Pool = “Litter”). There is also totals for each land use conversion category (e.g., Land Use Conversion = “Cropland Converted to Forest Land” and Land Use/Carbon Pool = “Total Cropland Converted to Forest Land”) and statewide totals for all conversion categories combined, both by pool (e.g., Land Use Conversion = “Totals (Pools) and Land Use/Carbon Pool = “Total Litter Flux”) and total of all pools (e.g., Land Use Conversion = “Totals (All) and Land Use/Carbon Pool = “Total Flux”).

*YEAR* = estimate for specified YEAR (1990-2019)


FIRE* (2)
9. \Data\CSV\Fire_nonCO2_CO2eq.csv: Non-CO₂ Emissions from Forest Fires (MMT CO₂ Eq.)
10. \Data\CSV\Fire_nonCO2_kt.csv: Non-CO₂ Emissions from Forest Fires (kt)

Variables included in this table:

State = name of state

Gas = name of gas, where CH4 = methane, CO = carbon monoxide, N2O = nitrous oxide, NOx = nitrogen oxide, and Total = the sum of emissions from each of the gasses

*YEAR* = estimate for specified YEAR (1990-2019)


FIRE* UNCERTAINTY (1)
11. \Data\CSV\Fire_uncertainty.csv: Quantitative Uncertainty Estimates of Non-CO₂ Emissions from Forest Fires (MMT CO₂ Eq. and Percent)

Variables included in this table:

State = name of state

Gas = name of gas, where CH4 = methane and N2O = nitrous oxide

2019 Emission Estimate (MMT CO2 Eq.) = 2019 estimate of non-CO₂ emissions from forest fires in MMT CO₂ eq.

Lower Bound (MMT CO2 Eq.) = lower bound of the 95% confidence interval around the 2019 non-CO₂ emission estimate in MMT CO₂ eq.

Upper Bound (MMT CO2 Eq.) = upper bound of the 95% confidence interval around the 2019 non-CO₂ emission estimate in MMT CO₂ eq.

Lower Bound (Percent) = lower bound of the 95% confidence interval around the 2019 non-CO₂ emission estimate in percent

Upper Bound (Percent) = upper bound of the 95% confidence interval around the 2019 non-CO₂ emission estimate in percent


FRF* AND WRW* (6)
12. \Data\CSV\FRF_flux_CO2eq.csv: Net CO₂ Flux from Forest Pools in Forest Land Remaining Forest Land (MMT CO₂ Eq.)
13. \Data\CSV\FRF_flux_MMTC.csv: Net C Flux from Forest Pools in Forest Land Remaining Forest Land (MMT C)
14. \Data\CSV\FRF_stock_MMTC.csv: C Stocks in Forest Land Remaining Forest Land (MMT C)
15. \Data\CSV\WRW_flux_CO2eq.csv: Net CO₂ Flux from Woodland Pools in Woodlands Remaining Woodlands (MMT CO₂ Eq.)
16. \Data\CSV\WRW_flux_MMTC.csv: Net C Flux from Woodland Pools in Woodlands Remaining Woodlands (MMT C)
17. \Data\CSV\WRW_stock_MMTC.csv: C Stocks in Woodlands Remaining Woodlands (MMT C)

Variables included in these tables:

State = name of state

Carbon Pools = Forest ecosystem storage pools as defined by IPCC (2006):
Total Forest/Woodland Ecosystem – the sum of all individual pools listed below.
Aboveground biomass – all living biomass above the soil including stem, stump, branches, bark, seeds, and foliage. This pool includes live understory.
Belowground biomass – all living biomass of coarse roots with diameters greater than 2 millimeters.
Dead wood – all nonliving woody biomass either standing, lying on the ground (but not including litter), or in the soil.
Litter – all duff, humus, and fine woody debris above the mineral soil, including woody fragments with diameters of up to 7.5 centimeters.
Soil organic carbon (SOC) – all organic material in soil to a depth of 1 meter but excluding the coarse roots of the belowground pool. This pool is split into “Soil (Mineral),” “Soil (Organic),” and for FRF flux tables only, “Drained Organic Soil.” Organic soils are differentiated from mineral soils based on the thickness of the organic horizon and percent organic matter. Organic soils are assumed to be wet, and drained organic soils are further differentiated by drainage or the process of artificially lowering the soil water table which exposes the organic material to drying.

*YEAR* = estimate for specified YEAR (1990-2019 [net flux] or 1990-2020 [stocks])


FRF* UNCERTAINTY (1)
18. \Data\CSV\FRF_flux_CO2eq_uncertainty.csv: Quantitative Uncertainty Estimates for Net CO₂ Flux from Forest Land Remaining Forest Land (MMT CO₂ Eq. and Percent)

Variables included in this table:

State = name of state

Source = Forest Ecosystem C Pools (i.e., the sum total of all the forest ecosystem carbon storage pools)

2019 Flux Estimate (MMT CO2 Eq.) = 2019 net carbon flux estimate in MMT CO₂ eq.

Lower Bound (MMT CO2 Eq.) = lower bound of the 95% confidence interval around the 2019 net carbon flux estimate in MMT CO₂ eq.

Upper Bound (MMT CO2 Eq.) = upper bound of the 95% confidence interval around the 2019 net carbon flux estimate in MMT CO₂ eq.

Lower Bound (Percent) = lower bound of the 95% confidence interval around the 2019 net carbon flux estimate in percent

Upper Bound (Percent) = upper bound of the 95% confidence interval around the 2019 net carbon flux estimate in percent


LULUC AREA (1)
19. \Data\CSV\LULUC_area.csv: Land Use and Land-Use Change for the Managed Land Base (Thousands of Hectares)

Variables included in this table:

State = name of state

Land Use & Land Use Change Categories = The abbreviations are F for Forest Land, C for Cropland, G for Grassland, O for Other Lands, S for Settlements, and W for Wetlands. Lands remaining in the same land-use category are identified with the land-use abbreviation given twice.
Total Forest Land = the sum of Forest Land Remaining Forest Land and Land Converted to Forest Land

FF = Forest Land Remaining Forest Land

Total Land Converted to Forest Land = the sum of all the land use change categories that convert land to forest land

CF = Cropland Converted to Forest Land

GF = Grassland Converted to Forest Land

OF = Other Lands Converted to Forest Land

SF = Settlements Converted to Forest Land

WF = Wetland Converted to Forest Land

Total Forest Land Converted to Land = the sum of all the land use change categories that convert forest land to land

FC = Forest Land Converted to Cropland

FG = Forest Land Converted to Grassland

FO = Forest Land Converted to Other Lands

FS = Forest Land Converted to Settlements

FW = Forest Land Converted to Wetland

Total Woodlands Remaining Woodlands = area of woodlands remaining woodlands

*YEAR* = estimate for specified YEAR (1990-2019)


SETTLEMENT TREES (1)
20. \Data\CSV\Settlement_trees.csv: Net Flux from Settlement Trees in Settlements Remaining Settlements (MMT CO₂ Eq. and MMT C)

Variables included in this table:

State = name of state

Net Flux = units of the net flux estimate ("MMT CO2 Eq." or "MMT C")

*YEAR* = estimate for specified YEAR (1990-2019)
Entity_and_Attribute_Detail_Citation:
Domke, Grant M.; Walters, Brian F.; Nowak, David J.; Smith, James, E.; Nichols, Michael C.; Ogle, Stephen M.; Coulston, J.W.; Wirth, T.C. 2021. Greenhouse gas emissions and removals from forest land, woodlands, and urban trees in the United States, 1990-2019. Resource Update FS-RU-307. Madison, WI: U.S. Department of Agriculture, Forest Service, Northern Research Station. 5 p. [plus 2 appendices]. https://doi.org/10.2737/FS-RU-307
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Research and Development
Contact_Position: Research Data Archivist
Contact_Address:
Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: CO
Postal_Code: 80526
Country: USA
Contact_Voice_Telephone: see Contact Instructions
Contact Instructions: This contact information was current as of April 2021. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Resource_Description: RDS-2021-0035
Distribution_Liability:
Metadata documents have been reviewed for accuracy and completeness. Unless otherwise stated, all data and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. However, neither the author, the Archive, nor any part of the federal government can assure the reliability or suitability of these data for a particular purpose. The act of distribution shall not constitute any such warranty, and no responsibility is assumed for a user's application of these data or related materials.

The metadata, data, or related materials may be updated without notification. If a user believes errors are present in the metadata, data or related materials, please use the information in (1) Identification Information: Point of Contact, (2) Metadata Reference: Metadata Contact, or (3) Distribution Information: Distributor to notify the author or the Archive of the issues.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: XLSX
Format_Version_Number: see Format Specification
Format_Specification:
Microsoft Excel Open XML spreadsheet file
File_Decompression_Technique: Files zipped with 7-Zip 19.0
Digital_Transfer_Option:
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Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/RDS-2021-0035
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Format_Specification:
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File_Decompression_Technique: Files zipped with 7-Zip 19.0
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Digital_Transfer_Option:
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Network_Address:
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Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20210415
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Northern Research Station, Forest Inventory and Analysis Program
Contact_Person: Brian Walters
Contact_Position: Forester
Contact_Address:
Address_Type: mailing and physical
Address: 1992 Folwell Ave.
City: St. Paul
State_or_Province: MN
Postal_Code: 55108
Country: USA
Contact_Voice_Telephone: 651-649-5135
Contact_Electronic_Mail_Address: brian.f.walters@usda.gov
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
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https://www.fs.usda.gov/rds/archive/products/RDS-2021-0035/_metadata_RDS-2021-0035.html