This article is about the greenhouse gas inventory category. For more general information, see
Land use,
Land-use change, and
Forestry.
Land use, land-use change, and forestry (LULUCF), also referred to as Forestry and other land use (FOLU) or Agriculture, Forestry and Other Land Use (AFOLU),[3][4]: 65 is defined as a "
greenhouse gas inventory sector that covers
emissions and
removals of greenhouse gases resulting from direct human-induced
land use such as settlements and commercial uses,
land-use change, and
forestry activities."[5]
The
United NationsFramework Convention on Climate Change (UNFCCC) Article 4(1)(a) requires all Parties to "develop, periodically update, publish and make available to the Conference of the Parties" as well as "national inventories of anthropogenic emissions by sources" "removals by sinks of all greenhouse gases not controlled by the
Montreal Protocol."
Under the UNFCCC reporting guidelines, human-induced greenhouse emissions must be reported in six sectors: energy (including stationary energy and transport); industrial processes; solvent and other product use; agriculture; waste; and land use,
land use change and forestry (LULUCF).[9]
The rules governing accounting and reporting of
greenhouse gas emissions from LULUCF under the
Kyoto Protocol are contained in several decisions of the Conference of Parties under the UNFCCC.
The Kyoto Protocol article 3.3 thus requires mandatory LULUCF accounting for afforestation (no forest for last 50 years), reforestation (no forest on 31 December 1989) and deforestation, as well as (in the first commitment period) under article 3.4 voluntary accounting for cropland management, grazing land management, revegetation and forest management (if not already accounted under article 3.3).[11]
This decision sets out the rules that govern how
Kyoto Parties with emission reduction commitments (so-called Annex 1 Parties) account for changes in carbon stocks in land use, land-use change and forestry.[12] It is mandatory for Annex 1 Parties to account for changes in carbons stocks resulting from
deforestation,
reforestation and
afforestation (B Article 3.3)[13] and voluntary to account for emissions from forest management, cropland management, grazing land management and revegetation (B. Article 3.4).[12]
Climate impacts
Land-use change can be a factor in CO2 (carbon dioxide) atmospheric concentration, and is thus a contributor to global
climate change.[14]IPCC estimates that land-use change (e.g. conversion of
forest into agricultural land) contributes a net 1.6 ± 0.8
Gt carbon per year to the atmosphere. For comparison, the major source of CO2, namely emissions from fossil fuel combustion and cement production, amount to 6.3 ± 0.6 Gt carbon per year.[15]
In 2021 the Global Carbon Project estimated annual land-use change emissions were 4.1 ± 2.6 Gt CO2 (CO2 not carbon: 1 Gt carbon = 3.67 Gt CO2[16]) for 2011–2020.[17]
The land-use sector is critical to achieving the aim of the
Paris Agreement to limit global warming to 2 °C (3.6 °F).[18]
Land-use change alters not just atmospheric CO2 concentration but also land surface biophysics such as
albedo and
evapotranspiration, both of which affect climate.[19] The impact of land-use change on the climate is also more and more recognized by the climate modeling community. On regional or local scales, the impact of LUC can be assessed by
Regional climate models (RCMs). This is however difficult, particularly for variables, which are inherently noisy, such as precipitation. For this reason, it is suggested to conduct RCM ensemble simulations.[20]
Extents and mapping
A 2021 study estimated, with higher resolution data, that land-use change has affected 17% of land in 1960–2019, or when considering multiple change events 32%, "around four times" previous estimates. They also investigate its drivers, identifying
global trade affecting agriculture as a main driver.[22][21]
Forest modeling
Traditionally,
earth system modeling has been used to analyze forests for climate projections. However, in recent years there has been a shift away from this modeling towards more of mitigation and adaptation projections.[23] These projections can give researchers a better understanding of what future forest management practices should be employed. Furthermore, this new approach to modeling also allows for land management practices to be analyzed in the model. Such land management practices can be: forest harvest, tree species selection, grazing, and crop harvest. These land management practices are implemented to understand their biophysical and biogeochemical effects on the forest. However, there is a major lack of available data for these practices currently, so there needs to be further monitoring and data collecting to help improve the accuracy of the models.[24]
^Steffen, Will; Sanderson, Angelina; Tyson, Peter; Jäger, Jill; et al. (2004).
"Global Change and the Climate System / A Planet Under Pressure"(PDF). International Geosphere-Biosphere Programme (IGBP). pp. 131, 133.
Archived(PDF) from the original on 19 March 2017. Fig. 3.67(j): loss of tropical rainforest and woodland, as estimated for tropical Africa, Latin America and South and Southeast Asia.
^Brown, Daniel G., ed. (2013). Land use and the carbon cycle : advances in integrated science, management, and policy. Cambridge: Cambridge University Press.
ISBN9781107648357.
OCLC823505307.
^Towards Sustainable Land Use: Aligning Biodiversity, Climate and Food Policies. (2020). France: OECD Publishing.
^Department of the Environment and Heritage (DEH) 2006, National Greenhouse Gas Inventory 2004: Accounting for the 108% Target, Commonwealth of Australia, Canberra.
^Hohne N, Wartmann S, Herold A, Freibauer A (2007). "The rules for land use, land use change and forestry under the Kyoto Protocol—lessons learned for the future climate negotiations". Environmental Science and Policy. 10 (4): 353–69.
doi:
10.1016/j.envsci.2007.02.001. at p. 354
^Ochoa-Hueso, R; Delgado-Baquerizo, M; King, PTA; Benham, M; Arca, V; Power, SA (February 2019). "Ecosystem type and resource quality are more important than global change drivers in regulating early stages of litter decomposition". Soil Biology and Biochemistry. 129: 144–152.
doi:
10.1016/j.soilbio.2018.11.009.
hdl:10261/336676.
S2CID92606851.
^National Research Council (U.S.). Committee on a National Strategy for Advancing Climate Modeling. (2012). A national strategy for advancing climate modeling. National Research Council (U.S.). Board on Atmospheric Sciences and Climate., National Research Council (U.S.). Division on Earth and Life Studies. Washington, D.C.: National Academies Press.
ISBN978-0-309-25978-1.
OCLC824780474.