Tomohiro Hajima

Dados Biográficos

ID7997165
NOMETomohiro Hajima
PRENOMESTomohiro
SOBRENOMEHajima
ASSINATURAHAJIMA T
AFILIAÇÕESJapan Agency for Marine-Earth Science and Technology
ORCID0000-0002-4828-5100
VERIFICADOSim
TOTAL DE OBRAS5
TOTAL DE CITAÇÕES0
TOTAL COMO AUTOR5
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO2015
ANO MAIS RECENTE DE PUBLICAÇÃO2025
ÍNDICE H0

  • CMIP6 models agree on similar carbon cycle feedbacks between enhancing terrestrial and marine carbon sinks

    Open AccessHao‐Wei Wey, Yiannis Moustakis et al.ARTICLEEnvironmental Research Letters2025

    Carbon dioxide removal (CDR) is a crucial component of climate mitigation required to reach international climate targets. However, gaps exist in our understanding of the responses and feedbacks of the Earth system to the deployment of CDR. In this study, we compare two complementary approaches that enhance the terrestrial and marine carbon sinks with afforestation and reforestation (A/R) and ocean alkalinity enhancement (OAE), respectively, unde…

  • Soil carbon sequestration simulated in CMIP6-Lumip models

    Open AccessAkihiko Ito, Tomohiro Hajima et al.ARTICLEEnvironmental Research Letters2020

    Land-use change affects both the quality and quantity of soil organic carbon (SOC) and leads to changes in ecosystem functions such as productivity and environmental regulation. Future changes in SOC are, however, highly uncertain owing to its heterogeneity and complexity. In this study, we analyzed the outputs of simulations of SOC stock by Earth system models (ESMs), most of which are participants in the Land-Use Model Intercomparison Project. …

  • Increase of the transient climate response to cumulative carbon emissions with decreasing CO 2 concentration scenarios

    Open AccessKaoru Tachiiri, Tomohiro Hajima et al.ARTICLEEnvironmental Research Letters2019

    Near-constancy of the transient climate response to cumulative carbon emissions (TCRE) facilitates the development of future emission pathways compatible with temperature targets. However, most studies have explored TCRE under scenarios of temperature increase. We used an Earth system model (MIROC-ESM) to examine TCRE in scenarios with increasing and stable CO 2 concentrations, as well as overshoot pathways in which global mean temperatures peak …

  • Increase of uncertainty in transient climate response to cumulative carbon emissions after stabilization of atmospheric CO 2 concentration

    Open AccessKaoru Tachiiri, Tomohiro Hajima et al.ARTICLEEnvironmental Research Letters2015

    We analyzed a dataset from an experiment of an earth system model of intermediate complexity, focusing on the change in transient climate response to cumulative carbon emissions (TCRE) after atmospheric CO _2 concentration was stabilized in the Representative Concentration Pathway (RCP) 4.5. We estimated the TCRE in 2005 at 0.3–2.4 K/TtC for an unconstrained case and 1.1–1.7 K/TtC when constrained with historical and present-day observational dat…

  • Examination of a climate stabilization pathway via zero-emissions using Earth system models

    Open AccessDaisuke Nohara, Junichi Tsutsui et al.ARTICLEEnvironmental Research Letters2015

    Long-term climate experiments up to the year 2300 have been conducted using two full-scale complex Earth system models (ESMs), CESM1(BGC) and MIROC-ESM, for a CO _2 emissions reduction pathway, termed Z650, where annual CO _2 emissions peak at 11 PgC in 2020, decline by 50% every 30 years, and reach zero in 2160. The results have been examined by focusing on the approximate linear relationship between the temperature increase and cumulative CO _2…