Katsumasa Tanaka
Biographic Data
| ID | 6718889 |
|---|---|
| NAME | Katsumasa Tanaka |
| GIVEN NAMES | Katsumasa |
| FAMILY NAME | Tanaka |
| SIGNATURE | TANAKA K |
| AFFILIATIONS | National Institute for Environmental Studies |
| ORCID | 0000-0001-9601-6442 |
| VERIFIED | Yes |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 4 |
| AUTHOR COUNT | 14 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2012 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
Spaces of anthropogenic CO2 emissions compatible with climate boundaries
Warming of northern peatlands increases the global temperature overshoot challenge
Potential and costs required for methane removal to compete with BECCS as a mitigation option
Methane is the second most important anthropogenic greenhouse gas (GHG) causing warming after carbon dioxide, and the emission reductions potentials are known to be limited due to the difficulty of abating agricultural methane. We explore in this study the emerging option of atmospheric methane removal (MR) that could complement carbon dioxide removal (CDR) in mitigation pathways. MR is technologically very challenging and potentially very expens…
Potential and costs required for methane removal to compete with BECCS as a mitigation option
Methane is the second most important anthropogenic greenhouse gas causing warming after carbon dioxide, and the emission reductions potentials are known to be limited due to the difficulty of abating agricultural methane. We explore in this study the emerging option of atmospheric methane removal (MR) that could complement carbon dioxide removal (CDR) in mitigation pathways. MR is technologically very challenging and potentially very expensive, s…
Points of no return to respect the Paris Agreement
lt;p>The physical reality of the Earth system implies that there are clear conditions to respect the Paris agreement, or to limit any climate impact below a certain level. To be policy relevant, these conditions should be expressed in terms of emission targets, such as peaking date, budget, or annual value of global CO2 emissions. They have been explored by the IPCC using integrated assessment models. However, past work has focused on bottom-up s…
Identifying crucial emission sources under low forcing scenarios by a comprehensive attribution analysis
Ensuring that offsets and other internationally transferred mitigation outcomes contribute effectively to limiting global warming
Ensuring the environmental integrity of internationally transferred mitigation outcomes, whether through offset arrangements, a market mechanism or non-market approaches, is a priority for the implementation of Article 6 of the Paris Agreement. Any conventional transferred mitigation outcome, such as an offset agreement, that involves exchanging greenhouse gases with different lifetimes can increase global warming on some timescales. We show that…
Near-real-time monitoring of global CO2 emissions reveals the effects of the Covid-19 pandemic
The COVID-19 pandemic is impacting human activities, and in turn energy use and carbon dioxide (CO 2 ) emissions. Here we present daily estimates of country-level CO 2 emissions for different sectors based on near-real-time activity data. The key result is an abrupt 8.8% decrease in global CO 2 emissions (−1551 Mt CO 2 ) in the first half of 2020 compared to the same period in 2019. The magnitude of this decrease is larger than during previous ec…
Limiting global warming to 1.5 °C will lower increases in inequalities of four hazard indicators of climate change
Clarifying characteristics of hazards and risks of climate change at 2 °C and 1.5 °C global warming is important for understanding the implications of the Paris Agreement. We perform and analyze large ensembles of 2 °C and 1.5 °C warming simulations. In the 2 °C runs, we find substantial increases in extreme hot days, heavy rainfalls, high streamflow and labor capacity reduction related to heat stress. For example, about half of the world’s popul…
Climate effects of non-compliant Volkswagen diesel cars
On-road operations of Volkswagen light-duty diesel vehicles equipped with defeat devices cause emissions of NOx up to 40 times above emission standards. Higher on-road NOx emissions are a widespread problem not limited to Volkswagen vehicles, but the Volkswagen violations brought this issue under the spotlight. While several studies investigated the health impacts of high NOx emissions, the climatic impacts have not been quantified. Here we show …
How do climate-related uncertainties influence 2 and 1.5 °C pathways
We investigate how uncertainties in key parameters in the carbon cycle and climate system propagate to the costs of climate change mitigation and adaptation needed to achieve the 2 and 1.5 °C targets by 2100 using a stochastic version of the simple climate model for optimization (SCM4OPT), an integrated assessment model. For the 2 °C target, we find a difference in 2100 CO 2 emission levels of 20.5 GtCO 2 (- 1.2 GtCO 2 to 19.4 GtCO 2 ), whereas t…
Bridging the gap between impact assessment methods and climate science
Carbon dioxide and climate impulse response functions for the computation of greenhouse gas metrics
The responses of carbon dioxide (CO2) and other climate variables to an emission pulse of CO2 into the atmosphere are often used to compute the Global Warming Potential (GWP) and Global Temperature change Potential (GTP), to characterize the response timescales of Earth System models, and to build reduced-form models. In this carbon cycle-climate model intercomparison project, which spans the full model hierarchy, we quantify responses to emissio…
Carbon Dioxide Emission Pathways Avoiding Dangerous Ocean Impacts
Anthropogenic emissions of greenhouse gases could lead to undesirable effects on oceans in coming centuries. Drawing on recommendations published by the German Advisory Council on Global Change, levels of unacceptable global marine change (so-called guardrails) are defined in terms of global mean temperature, sea level rise, and ocean acidification. A global-mean climate model [the Aggregated Carbon Cycle, Atmospheric Chemistry and Climate Model …
Carbon Dioxide Emission Pathways Avoiding Dangerous Ocean Impacts
Anthropogenic emissions of greenhouse gases could lead to undesirable effects on oceans in coming centuries. Drawing on recommendations published by the German Advisory Council on Global Change, levels of unacceptable global marine change (so-called guardrails) are defined in terms of global mean temperature, sea level rise, and ocean acidification. A global-mean climate model [the Aggregated Carbon Cycle, Atmospheric Chemistry and Climate Model …
Carbon dioxide and climate impulse response functions for the computation of greenhouse gas metrics
The responses of carbon dioxide (CO2) and other climate variables to an emission pulse of CO2 into the atmosphere are often used to compute the Global Warming Potential (GWP) and Global Temperature change Potential (GTP), to characterize the response timescales of Earth System models, and to build reduced-form models. In this carbon cycle-climate model intercomparison project, which spans the full model hierarchy, we quantify responses to emissio…
Bridging the gap between impact assessment methods and climate science
Climate effects of non-compliant Volkswagen diesel cars
On-road operations of Volkswagen light-duty diesel vehicles equipped with defeat devices cause emissions of NOx up to 40 times above emission standards. Higher on-road NOx emissions are a widespread problem not limited to Volkswagen vehicles, but the Volkswagen violations brought this issue under the spotlight. While several studies investigated the health impacts of high NOx emissions, the climatic impacts have not been quantified. Here we show …
How do climate-related uncertainties influence 2 and 1.5 °C pathways
We investigate how uncertainties in key parameters in the carbon cycle and climate system propagate to the costs of climate change mitigation and adaptation needed to achieve the 2 and 1.5 °C targets by 2100 using a stochastic version of the simple climate model for optimization (SCM4OPT), an integrated assessment model. For the 2 °C target, we find a difference in 2100 CO 2 emission levels of 20.5 GtCO 2 (- 1.2 GtCO 2 to 19.4 GtCO 2 ), whereas t…
Limiting global warming to 1.5 °C will lower increases in inequalities of four hazard indicators of climate change
Clarifying characteristics of hazards and risks of climate change at 2 °C and 1.5 °C global warming is important for understanding the implications of the Paris Agreement. We perform and analyze large ensembles of 2 °C and 1.5 °C warming simulations. In the 2 °C runs, we find substantial increases in extreme hot days, heavy rainfalls, high streamflow and labor capacity reduction related to heat stress. For example, about half of the world’s popul…
Near-real-time monitoring of global CO2 emissions reveals the effects of the Covid-19 pandemic
The COVID-19 pandemic is impacting human activities, and in turn energy use and carbon dioxide (CO 2 ) emissions. Here we present daily estimates of country-level CO 2 emissions for different sectors based on near-real-time activity data. The key result is an abrupt 8.8% decrease in global CO 2 emissions (−1551 Mt CO 2 ) in the first half of 2020 compared to the same period in 2019. The magnitude of this decrease is larger than during previous ec…
Ensuring that offsets and other internationally transferred mitigation outcomes contribute effectively to limiting global warming
Ensuring the environmental integrity of internationally transferred mitigation outcomes, whether through offset arrangements, a market mechanism or non-market approaches, is a priority for the implementation of Article 6 of the Paris Agreement. Any conventional transferred mitigation outcome, such as an offset agreement, that involves exchanging greenhouse gases with different lifetimes can increase global warming on some timescales. We show that…
Points of no return to respect the Paris Agreement
lt;p>The physical reality of the Earth system implies that there are clear conditions to respect the Paris agreement, or to limit any climate impact below a certain level. To be policy relevant, these conditions should be expressed in terms of emission targets, such as peaking date, budget, or annual value of global CO2 emissions. They have been explored by the IPCC using integrated assessment models. However, past work has focused on bottom-up s…
Identifying crucial emission sources under low forcing scenarios by a comprehensive attribution analysis
Potential and costs required for methane removal to compete with BECCS as a mitigation option
Methane is the second most important anthropogenic greenhouse gas causing warming after carbon dioxide, and the emission reductions potentials are known to be limited due to the difficulty of abating agricultural methane. We explore in this study the emerging option of atmospheric methane removal (MR) that could complement carbon dioxide removal (CDR) in mitigation pathways. MR is technologically very challenging and potentially very expensive, s…
Spaces of anthropogenic CO2 emissions compatible with climate boundaries
Warming of northern peatlands increases the global temperature overshoot challenge
Potential and costs required for methane removal to compete with BECCS as a mitigation option
Methane is the second most important anthropogenic greenhouse gas (GHG) causing warming after carbon dioxide, and the emission reductions potentials are known to be limited due to the difficulty of abating agricultural methane. We explore in this study the emerging option of atmospheric methane removal (MR) that could complement carbon dioxide removal (CDR) in mitigation pathways. MR is technologically very challenging and potentially very expens…
Environmental Science (13 works) · Climate change (11 works) · Global warming (9 works) · Climate Change Policy and Economics (8 works) · Greenhouse gas (8 works) · Climatology (7 works) · Atmospheric and Environmental Gas Dynamics (6 works) · Engineering (6 works) · Atmospheric sciences (5 works) · Business (5 works)