title: Global land-use allocation model linked to an integrated assessment model.
abstract: We developed a global land-use allocation model that can be linked to integrated assessment models (IAMs) with a coarser spatial resolution. Using the model, we performed a downscaling of the IAMs' regional aggregated land-use projections to obtain a spatial land-use distribution, which could subsequently be used by Earth system models for global environmental assessments of ecosystem services, food security, and climate policies. Here we describe the land-use allocation model, discuss the verification of the downscaling technique, and explain the influences of the downscaling on estimates of land-use carbon emissions. A comparison of the emissions estimated with and without downscaling suggested that the land-use downscaling would help capture the spatial distribution of carbon stock density and regional heterogeneity of carbon emissions caused by cropland and pasture land expansion.
authors.affiliation: Center for Social and Environmental Systems Research, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan; Ecosystem Services and Management Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg A-2361, Austria. Electronic address: hasegawa.tomoko@nies.go.jp.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Hasegawa
authors.affiliation: Center for Social and Environmental Systems Research, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan; Energy Program, International Institute for Applied Systems Analysis (IIASA), Laxenburg A-2361, Austria.
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Fujimori
authors.affiliation: Center for Global Environmental Research, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Ito
authors.affiliation: Center for Social and Environmental Systems Research, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Takahashi
authors.affiliation: Center for Social and Environmental Systems Research, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Masui
keywords: Integrated assessment; Land-use change; Spatial allocation