Contribution of Land Cover Conversions to Connecticut (USA) Carbon Footprint
Abstract
:1. Introduction
The Role of Soils in Connecticut’s Global Warming Solutions Act and Carbon Footprint
Stocks | Ecosystem Services | |||
---|---|---|---|---|
Soil Order | General Characteristics and Constraints | Provisioning | Regulation/Maintenance | Cultural |
Slightly Weathered | ||||
Entisols | Embryonic soils with ochric epipedon | x | x | x |
Inceptisols | Young soils with ochric or umbric epipedon | x | x | x |
Histosols | Organic soils with ≥ 20% of organic carbon | x | x | x |
Moderately Weathered | ||||
Mollisols | Carbon-enriched soils with B.S. ≥ 50% | x | x | x |
2. Materials and Methods
County | Total SOC Storage (kg) (%) | Degree of Weathering and Soil Development | |||
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
Total SOC Storage (kg), (% of Total by County) | |||||
Fairfield | 1.7 × 1010 (12) | 1.7 × 109 (10) | 1.2 × 1010 (67) | 3.9 × 109 (23) | 2.8 × 107 (0) |
Hartford | 1.8 × 1010 (13) | 4.2 × 109 (23) | 1.2 × 1010 (65) | 2.0 × 109 (11) | 1.8 × 108 (1) |
Litchfield | 2.9 × 1010 (20) | 9.8 × 108 (3) | 1.9 × 1010 (66) | 8.7 × 109 (30) | 1.3 × 108 (1) |
Middlesex | 1.1 × 1010 (8) | 7.1 × 108 (6) | 7.3 × 109 (65) | 3.1 × 109 (28) | 4.5 × 107 (1) |
New Haven | 1.8 × 1010 (13) | 2.0 × 109 (11) | 1.1 × 1010 (59) | 5.1 × 109 (29) | 1.7 × 108 (1) |
New London | 2.1 × 1010 (15) | 1.3 × 109 (6) | 1.3 × 1010 (64) | 6.4 × 109 (30) | 0 (0) |
Tolland | 1.1 × 1010 (8) | 8.1 × 108 (8) | 8.1 × 109 (76) | 1.6 × 109 (15) | 5.3 × 107 (1) |
Windham | 1.6 × 1010 (11) | 1.4 × 109 (9) | 9.8 × 109 (60) | 5.0 × 109 (31) | 0 (0) |
Totals | 1.4 × 1011 (100) | 1.3 × 1010 (9) | 9.1 × 1010 (65) | 3.6 × 1010 (25) | 6.2 × 108 (1) |
3. Results
3.1. Storage and Value of SOC by Soil Order and County for Connecticut
3.2. Storage and Value of SIC by Soil Order and County for Connecticut
3.3. Storage and Value of TSC (SOC + SIC) by Soil Order and County for Connecticut
County | Total TSC Storage (kg) (%) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
Total TSC Storage (kg), (% of Total by County) | |||||
Fairfield | 2.5 × 1010 (12) | 2.7 × 109 (11) | 1.8 × 1010 (73) | 4.0 × 109 (16) | 5.2 × 107 (0) |
Hartford | 2.7 × 1010 (13) | 6.7 × 109 (25) | 1.8 × 1010 (67) | 2.0 × 109 (7) | 3.4 × 108 (1) |
Litchfield | 4.0 × 1010 (20) | 1.6 × 109 (4) | 3.0 × 1010 (74) | 8.9 × 109 (22) | 2.5 × 108 (1) |
Middlesex | 1.6 × 1010 (8) | 1.1 × 109 (7) | 1.2 × 1010 (72) | 3.2 × 109 (20) | 8.4 × 107 (1) |
New Haven | 2.5 × 1010 (13) | 3.2 × 109 (13) | 1.7 × 1010 (66) | 5.2 × 109 (21) | 3.2 × 108 (1) |
New London | 3.0 × 1010 (15) | 2.0 × 109 (7) | 2.1 × 1010 (71) | 6.5 × 109 (22) | 0 (0) |
Tolland | 1.6 × 1010 (8) | 1.3 × 109 (8) | 1.3 × 1010 (81) | 1.7 × 109 (10) | 9.9 × 107 (1) |
Windham | 2.3 × 1010 (11) | 2.2 × 109 (10) | 1.5 × 1010 (68) | 5.1 × 109 (22) | 0 (0) |
Totals | 2.0 × 1011 (100) | 2.1 × 1010 (10) | 1.4 × 1011 (71) | 3.6 × 1010 (18) | 1.1 × 109 (1) |
County | Total SC-CO2 ($) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
SC-CO2 ($ = USD) | |||||
Fairfield | 4.2 × 109 | 4.6 × 108 | 3.1 × 109 | 6.7 × 108 | 8.7 × 106 |
Hartford | 4.6 × 109 | 1.1 × 109 | 3.1 × 109 | 3.4 × 108 | 5.8 × 107 |
Litchfield | 6.8 × 109 | 2.6 × 108 | 5.0 × 109 | 1.5 × 109 | 4.1 × 107 |
Middlesex | 2.7 × 109 | 1.9 × 108 | 1.9 × 109 | 5.3 × 108 | 1.4 × 107 |
New Haven | 4.3 × 109 | 5.4 × 108 | 2.8 × 109 | 8.8 × 108 | 5.4 × 107 |
New London | 5.0 × 109 | 3.4 × 108 | 3.5 × 109 | 1.1 × 109 | 0 |
Tolland | 2.7 × 109 | 2.2 × 108 | 2.2 × 109 | 2.8 × 108 | 1.7 × 107 |
Windham | 3.8 × 109 | 3.8 × 108 | 2.6 × 109 | 8.5 × 108 | 0 |
Totals | 3.4 × 1010 | 3.5 × 109 | 2.4 × 1010 | 6.1 × 109 | 1.9 × 108 |
3.4. Land Use/Land Cover Change by Soil Order in Connecticut from 2001 to 2016
NLCD Land Cover Classes (LULC) | 2016 Total Area by LULC (km2) (Change in Area, 2001–2016, %) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
2016 Area by Soil Order, km2 (Change in Area, 2001–2016, %) | |||||
Barren land | 39.0 (−5.8%) | 19.1 (−6.3%) | 19.4 (−5.3%) | 0.5 (−12.5%) | 0.0 (100.0%) |
Woody wetlands | 1010.0 (0.4%) | 123.4 (0.6%) | 721.5 (−0.0%) | 164.4 (2.1%) | 0.8 (−2.3%) |
Shrub/Scrub | 50.0 (83.8%) | 5.7 (12.6%) | 44.2 (100.3%) | 0.1 (45.3%) | 0.1 (57.7%) |
Mixed forest | 1554.0 (−0.4%) | 124.0 (−0.9%) | 1415.4 (−0.3%) | 10.1 (−0.1%) | 4.5 (−1.1%) |
Deciduous forest | 5569.7 (−2.7%) | 245.5 (−6.6%) | 5287.7 (−2.6%) | 15.1 (−2.2%) | 21.4 (−5.3%) |
Herbaceous | 102.6 (40.2%) | 20.7 (4.5%) | 80.8 (53.3%) | 0.6 (77.5%) | 0.5 (51.9%) |
Evergreen forest | 202.8 (−3.0%) | 34.8 (−5.5%) | 165.7 (−2.5%) | 1.1 (−4.7%) | 1.2 (−3.0%) |
Emergent herbaceous wetlands | 76.7 (−4.6%) | 8.4 (−6.9%) | 22.7 (−4.5%) | 45.6 (−4.1%) | 0.0 (7.7%) |
Hay/Pasture | 476.7 (−7.0%) | 58.9 (−11.6%) | 413.6 (−6.4%) | 2.3 (−1.2%) | 1.9 (−10.2%) |
Cultivated crops | 198.4 (3.2%) | 37.9 (−4.1%) | 159.6 (5.0%) | 0.2 (11.3%) | 0.7 (15.8%) |
Developed, open space | 1260.1 (3.1%) | 208.1 (−1.1%) | 1035.8 (3.9%) | 8.6 (0.1%) | 7.6 (5.6%) |
Developed, medium intensity | 577.2 (11.1%) | 311.6 (7.1%) | 262.0 (16.0%) | 1.8 (28.0%) | 1.8 (24.6%) |
Developed, low intensity | 898.4 (3.8%) | 288.5 (−0.8%) | 599.8 (6.1%) | 5.2 (3.7%) | 4.9 (7.6%) |
Developed, high intensity | 171.9 (18.5%) | 139.6 (11.9%) | 31.9 (59.1%) | 0.2 (32.0%) | 0.2 (101.5%) |
4. Significance of Results
4.1. Significance of Results for Connecticut’s GHG Emissions Inventory and Global Warming Solutions Act
NLCD Land Cover Classes (LULC) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|
Slight | Moderate | |||
Entisols | Inceptisols | Histosols | Mollisols | |
Area Change, km2 (SC-CO2, $ = USD) | ||||
Developed, open space (39.6 km2, $94.2M) | - | 39.2 ($92.5M) | - | 0.4 ($1.7M) |
Developed, medium intensity (57.6 km2, $140.8M) | 20.7 ($44.9M) | 36.1 ($85.1M) | 0.4 ($9.3M) | 0.4 ($1.5M) |
Developed, low intensity (35.1 km2, $87.5M) | - | 34.6 ($81.6M) | 0.2 ($4.4M) | 0.3 ($1.5M) |
Developed, high intensity (26.8 km2, $60.7M) | 14.9 ($32.3M) | 11.8 ($27.9M) | - | 0.1 ($511,515.0) |
Totals (159.1 km2, $383.3M) | 35.6 ($77.2M) | 121.7 ($287.1M) | 0.6 ($13.7M) | 1.2 ($5.1M) |
County | Total Area Change (km2) (SC-CO2, $ = USD) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
Developed Area Increase between 2001 and 2016 (km2) (SC-CO2, $ = USD) | |||||
Fairfield | 31.6 ($75.6M) | 5.7 ($12.3M) | 25.8 ($60.9M) | 0.1 ($2.4M) | 0 |
Hartford | 49.5 ($117.3M) | 15.2 ($33.0M) | 33.4 ($78.9M) | 0.1 ($2.4M) | 0.7 ($3.1M) |
Litchfield | 7.0 ($16.3M) | 1.3 ($2.7M) | 5.8 ($13.6M) | 0 | 0 |
Middlesex | 11.5 ($28.9M) | 1.8 ($3.8M) | 9.6 ($22.7M) | 0.1 ($2.4M) | 0 |
New Haven | 32.6 ($80.4M) | 7.4 ($16.0M) | 24.9 ($58.7M) | 0.2 ($4.8M) | 0.2 ($842,000.0) |
New London | 14.0 ($32.4M) | 3.1 ($6.8M) | 10.9 ($25.6M) | 0 | 0 |
Tolland | 8.7 ($20.6M) | 1.4 ($2.9M) | 7.2 ($16.9M) | 0 | 0.2 ($697,630.8) |
Windham | 7.3 ($16.6M) | 3.2 ($6.8M) | 4.1 ($9.8M) | 0 | 0 |
Totals | 162.2 ($388.1M) | 38.9 ($84.4M) | 121.7 ($287.1M) | 0.5 ($12.0M) | 1.1 ($4.6M) |
4.2. Significance of Results in Broader Context
- -
- Definition of CF: Soil CF is defined as GHG emissions because of land disturbances from various soil types and events expressed as carbon dioxide (CO2) equivalent, which can be expressed in monetary terms (e.g., social costs of C, etc.).
- -
- Drivers: Soil CF is commonly caused by natural and/or anthropogenic (e.g., urban development) disturbances. Anthropogenic drivers often include land consumption-based new developments (e.g., new home construction).
- -
- Elements: Soil CF has spatial (e.g., science-based, administrative, etc.) and temporal (e.g., event) scales, and can have different intensities (e.g., low, medium, and high-intensity developments). Soil CF has the composition (e.g., soil type, land cover, soil C content, etc.).
- -
- Measurements: Soil CF is determined by using the area of land disturbance and soil C content to calculate the maximum potential for realized social costs of C (SC-CO2) from each disturbance based on land cover change analysis (Figure 1). These estimates can be performed at various administrative and spatial scales (Figure 1).
- -
- Dynamics: Soil CF results in soil and land cover transformations leading to biophysical and socio-economic transformations. The consequences of these transformations extend beyond the boundaries of CF since GHG emissions extend outside the boundaries of the CF.
- -
- Effects: Soil CF results not only in GHG emissions, but in biodiversity loss, increase in impervious surface, and reduction in both agricultural and forest lands and the future sequestration potential of these lands.
- -
- -
- Outcomes: Soil CF contributes directly to climate change while also increasing the vulnerabilities of ecosystems to climate change.
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
Glossary
CF | Carbon footprint |
ED | Ecosystem disservices |
ES | Ecosystem services |
EPA | Environmental Protection Agency |
SC-CO2 | Social cost of carbon emissions |
SDGs | Sustainable Development Goals |
SOC | Soil organic carbon |
SIC | Soil inorganic carbon |
SOM | Soil organic matter |
SSURGO | Soil Survey Geographic Database |
STATSGO | State Soil Geographic Database |
TSC | Total soil carbon |
USDA | United States Department of Agriculture |
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Ownership (e.g., government, private, foreign, shared, single, etc.) | |||||
Time (e.g., information disclosure, etc.) | Stocks/Source Attribution | Flows | Value | ||
Biophysical Accounts (Science-Based) | Administrative Accounts (Boundary-Based) | Monetary Account(s) | Benefit(s) | Total Value | |
Soil extent: | Administrative extent: | Ecosystem good(s) and service(s): | Sector: | Types of value: | |
Composite (total) stock: Total soil carbon (TSC) = Soil organic carbon (SOC) + Soil inorganic carbon (SIC) | |||||
Past (e.g., post-development disclosures) Current (e.g., status) Future (e.g., pre-development disclosures) | Environment | The social cost of carbon (SC-CO2) emissions can be used in carbon footprint (CF) calculations: | |||
- Soil orders (Entisols, Inceptisols, Histosols, Mollisols) | - State (Connecticut) - County (8 counties) | - Regulating (e.g., carbon sequestration) | - Carbon sequestration | - $46 per metric ton of CO2 applicable for 2025 (2007 U.S. dollars with an average discount rate of 3% [10]) |
County | Total Area (km2) (%) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
2016 Area (km2), (% of Total County Area) | |||||
Fairfield | 1557.8 (13) | 211.0 (14) | 1316.7 (85) | 28.1 (2) | 2.1 (0) |
Hartford | 1840.8 (15) | 520.0 (28) | 1293.0 (70) | 14.1 (1) | 13.7 (1) |
Litchfield | 2317.3 (19) | 122.0 (5) | 2123.1 (92) | 62.3 (3) | 9.8 (0) |
Middlesex | 935.7 (8) | 88.6 (9) | 821.6 (88) | 22.1 (2) | 3.4 (0) |
New Haven | 1491.8 (12) | 250.8 (17) | 1191.7 (80) | 36.6 (2) | 12.7 (1) |
New London | 1706.2 (14) | 158.3 (9) | 1502.5 (88) | 45.5 (3) | 0 |
Tolland | 1029.8 (8) | 101.7 (10) | 912.5 (89) | 11.6 (1) | 3.9 (0) |
Windham | 1308.0 (11) | 173.6 (13) | 1099.0 (84) | 35.5 (3) | 0 |
Totals | 12,187.5 (100) | 1626.0 (13) | 10,260.1 (84) | 255.8 (2) | 45.6 (1) |
Soil Order | SOC Content | SIC Content | TSC Content | SOC Value | SIC Value | TSC Value |
---|---|---|---|---|---|---|
Minimum—Midpoint—Maximum Values | Midpoint Values | |||||
(kg m−2) | (kg m−2) | (kg m−2) | ($ m−2) | ($ m−2) | ($ m−2) | |
Slightly Weathered | ||||||
Entisols | 1.8–8.0–15.8 | 1.9–4.8–8.4 | 3.7–12.8–24.2 | 1.35 | 0.82 | 2.17 |
Inceptisols | 2.8–8.9–17.4 | 2.5–5.1–8.4 | 5.3–14.0–25.8 | 1.50 | 0.86 | 2.36 |
Histosols | 63.9–140.1–243.9 | 0.6–2.4–5.0 | 64.5–142.5–248.9 | 23.62 | 0.41 | 24.03 |
Moderately Weathered | ||||||
Mollisols | 5.9–13.5–22.8 | 4.9–11.5–19.7 | 10.8–25.0–42.5 | 2.28 | 1.93 | 4.21 |
County | Total SC-CO2 ($) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
SC-CO2 ($ = USD) | |||||
Fairfield | 2.9 × 109 | 2.8 × 108 | 2.0 × 109 | 6.6 × 108 | 4.7 × 106 |
Hartford | 3.0 × 109 | 7.0 × 108 | 1.9 × 109 | 3.3 × 108 | 3.1 × 107 |
Litchfield | 4.8 × 109 | 1.6 × 108 | 3.2 × 109 | 1.5 × 109 | 2.2 × 107 |
Middlesex | 1.9 × 109 | 1.2 × 108 | 1.2 × 109 | 5.2 × 108 | 7.7 × 106 |
New Haven | 3.0 × 109 | 3.4 × 108 | 1.8 × 109 | 8.6 × 108 | 2.9 × 107 |
New London | 3.5 × 109 | 2.1 × 108 | 2.3 × 109 | 1.1 × 109 | 0 |
Tolland | 1.8 × 109 | 1.4 × 108 | 1.4 × 109 | 2.7 × 108 | 9.0 × 106 |
Windham | 2.7 × 109 | 2.3 × 108 | 1.6 × 109 | 8.4 × 108 | 0 |
Totals | 2.4 × 1010 | 2.2 × 109 | 1.5 × 1010 | 6.0 × 109 | 1.0 × 108 |
County | Total SIC Storage (kg) (%) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
Total SIC Storage (kg), (% of Total by County) | |||||
Fairfield | 7.8 × 109 (13) | 1.0 × 109 (13) | 6.7 × 109 (86) | 6.7 × 107 (1) | 2.4 × 107 (0) |
Hartford | 9.3 × 109 (15) | 2.5 × 109 (27) | 6.6 × 109 (71) | 3.4 × 107 (0) | 1.6 × 108 (2) |
Litchfield | 1.2 × 1010 (19) | 5.9 × 108 (5) | 1.1 × 1010 (93) | 1.5 × 108 (1) | 1.1 × 108 (1) |
Middlesex | 4.7 × 109 (8) | 4.3 × 108 (9) | 4.2 × 109 (89) | 5.3 × 107 (1) | 3.9 × 107 (1) |
New Haven | 7.5 × 109 (12) | 1.2 × 109 (16) | 6.1 × 109 (81) | 8.8 × 107 (1) | 1.5 × 108 (2) |
New London | 8.5 × 109 (14) | 7.6 × 108 (9) | 7.7 × 109 (90) | 1.1 × 108 (1) | 0 (0) |
Tolland | 5.2 × 109 (9) | 4.9 × 108 (9) | 4.7 × 109 (89) | 2.8 × 107 (1) | 4.5 × 107 (1) |
Windham | 6.5 × 109 (11) | 8.3 × 108 (13) | 5.6 × 109 (86) | 8.5 × 107 (1) | 0 (0) |
Totals | 6.1 × 1010 (100) | 7.8 × 109 (13) | 5.2 × 1010 (85) | 6.1 × 108 (1) | 5.2 × 108 (1) |
County | Total SC-CO2 ($) | Degree of Weathering and Soil Development | |||
---|---|---|---|---|---|
Slight | Moderate | ||||
Entisols | Inceptisols | Histosols | Mollisols | ||
SC-CO2 ($ = USD) | |||||
Fairfield | 1.3 × 109 | 1.7 × 108 | 1.1 × 109 | 1.2 × 107 | 4.0 × 106 |
Hartford | 1.6 × 109 | 4.3 × 108 | 1.1 × 109 | 5.8 × 106 | 2.6 × 107 |
Litchfield | 2.0 × 109 | 1.0 × 108 | 1.8 × 109 | 2.6 × 107 | 1.9 × 107 |
Middlesex | 7.9 × 108 | 7.3 × 107 | 7.1 × 108 | 9.1 × 106 | 6.5 × 106 |
New Haven | 1.3 × 109 | 2.1 × 108 | 1.0 × 109 | 1.5 × 107 | 2.5 × 107 |
New London | 1.4 × 109 | 1.3 × 108 | 1.3 × 109 | 1.9 × 107 | 0 |
Tolland | 8.8 × 108 | 8.3 × 107 | 7.8 × 108 | 4.8 × 106 | 7.6 × 106 |
Windham | 1.1 × 109 | 1.4 × 108 | 9.5 × 108 | 1.5 × 107 | 0 |
Totals | 1.0 × 1010 | 1.3 × 109 | 8.8 × 109 | 1.0 × 108 | 8.8 × 107 |
Soil Regulating Ecosystem Services in the State of Connecticut | |||
---|---|---|---|
Degree of Weathering and Soil Development | |||
Slight 99% | Moderate 1% | ||
Entisols 13% | Inceptisols 84% | Histosols 2% | Mollisols 1% |
Social cost of soil organic carbon (SOC): $23.7B | |||
$2.2B | $15.4B | $6.0B | $104.0M |
9% | 65% | 25% | 1% |
Social cost of soil inorganic carbon (SIC): $10.3B | |||
$1.3B | $8.8B | $104.9M | $88.0M |
13% | 85% | 1% | 1% |
Social cost of total soil carbon (TSC): $34.0B | |||
$3.5B | $24.2B | $6.1B | $192.0M |
10% | 71% | 18% | 1% |
Sensitivity to climate change | |||
Low | Low | High | High |
SOC and SIC sequestration (recarbonization) potential | |||
Low | Low | Low | Low |
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Mikhailova, E.A.; Lin, L.; Hao, Z.; Zurqani, H.A.; Post, C.J.; Schlautman, M.A.; Post, G.C. Contribution of Land Cover Conversions to Connecticut (USA) Carbon Footprint. Geographies 2022, 2, 286-302. https://doi.org/10.3390/geographies2020020
Mikhailova EA, Lin L, Hao Z, Zurqani HA, Post CJ, Schlautman MA, Post GC. Contribution of Land Cover Conversions to Connecticut (USA) Carbon Footprint. Geographies. 2022; 2(2):286-302. https://doi.org/10.3390/geographies2020020
Chicago/Turabian StyleMikhailova, Elena A., Lili Lin, Zhenbang Hao, Hamdi A. Zurqani, Christopher J. Post, Mark A. Schlautman, and Gregory C. Post. 2022. "Contribution of Land Cover Conversions to Connecticut (USA) Carbon Footprint" Geographies 2, no. 2: 286-302. https://doi.org/10.3390/geographies2020020