Taroh Matsuno's research while affiliated with Japan Agency for Marine-Earth Science Technology and other places

Publications (8)

Article
Full-text available
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 CO2 emissions reduction pathway, termed Z650, where annual CO2 emissions peak at 11 PgC in 2020, decline by 50% every 30 years, and reach zero in 2160. The results have been examined by focus...
Chapter
Necessity of explicitly reproducing convective cloud systems in the tropics as a next step of modeling of the global atmosphere is discussed through re-examinations of past and current modeling studies and underlying conceptions. Responding to the necessity an ultra-high resolution (3.5 km-7 km mesh) global atmosphere model, NICAM, has been develop...
Article
An ocean general circulation model (OGCM) on a non-orthogonal cubic grid originally proposed by Purser and Rančić [Purser, R.J., Rančić, M.A., 1998. Smooth quasi-homogeneous gridding of the sphere, Q.J.R. Meteorol. Soc., 124, 637–647] is developed. The grid size is very homogeneous with the ratio of the minimum to the maximum grid intervals being a...
Article
We examined climate-carbon cycle feedback by performing a global warming experiment using MIROC-based coupled climate-carbon cycle model. The model showed that by the end of the 21st century, warming leads to a further increase in carbon dioxide (CO2) level of 123 ppm by volume (ppmv). This positive feedback can mostly be attributed to land-based s...
Article
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A new type of ultra-high resolution atmospheric global circulation model is developed. The new model is designed to perform “cloud resolving simulations” by directly calculating deep convection and meso-scale circulations, which play key roles not only in the tropical circulations but in the global circulations of the atmosphere. Since cores of dee...
Article
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The project aims at development of an integrated earth system model, where biological and chemi-cal processes important for the global environment are included to interact with climate changes. The model is developed by adding individual component models to atmospheric and oceanic general circulation models (GCMs). The component models are terrestr...
Article
Full-text available
This project consists of three themes that are relatively independent. The corresponding three teams develop an integrated earth system model, a cloud-resolving atmospheric general circulation model with the icosahedral grid system, and an eddy- resolving ocean general circulation model with the cubic grid system, respectively. On the first theme,...
Article
Full-text available
The project aims at development of an integrated earth system model, where biological and chemical processes important for the global environment are allowed to interact with climate changes. The model is developed by adding individual compo-nent models to a coupled atmosphere-ocean general circulation model. Here we report analysis on results from...

Citations

... Leduc et al, 2015) have also pointed to the changing carbon uptake capacity of the terrestrial biosphere as an important contributing factor . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 A c c e p t e d M a n u s c r i p t 4 There may be important differences, however, in the behaviour of the TCRE during periods of increasing vs. decreasing or zero CO2 emissions. Nohara et al. (2015) compared the TCRE response in two comprehensive models for a scenario where CO2 emissions peaked and declined to zero at a total of 1100 Gt C emitted. While both models simulated a near-constant TCRE during the period of increasing emissions, the models behaved differently during the period of declining followed by zero emissions, with one model showing continued warming, while the other simulated stable and then declining temperatures after the point of zero emissions. ...
... The carbon-concentration and carbon-climate feedbacks can be characterized by feedback metrics; for example, by the feedback factors β and γ (Friedlingstein et al., 2003) that quantify the gain/loss of carbon in terrestrial or marine reservoirs per unit change in atmospheric CO 2 concentration and temperature, respectively (see Sect. 2 for details). These feedback factors are valuable tools to compare the feedback strength among different models (Friedlingstein et al., 2003(Friedlingstein et al., , 2006Yoshikawa et al., 2008;Boer and Arora, 2009;Gregory et al., 2009;Roy et al., 2011;Arora et al., 2013Arora et al., , 2020 and can be calculated using idealized model simulations in which the effect of CO 2 on the carbon cycle and the radiative effect of CO 2 are decoupled. In a biogeochemically coupled (BGC) simulation, the radiation code of an ESM does not respond to increasing atmospheric CO 2 concentrations but the terrestrial and marine carbon cycles do. ...
... In MIROC-ES2L, the sea ice component is updated from MIROC4m to a sub-grid multicategory model described in Komuro and Suzuki (2013). The most important update in MIROC-ES2L from previous versions of MIROC-ESM (Watanabe et al., 2011;Kawamiya et al., 2005) is the introduction of a nitrogen cycle. The land nitrogen and carbon cycles are predicted by a modified version of the Vegetation Integrative Simulator for a Trace gas model, VISIT (Ito and Inatomi, 2012), referred to hereafter as VISIT-e. ...
... In what follows, we will refer to this mapping as the gnomonic projection for brevity. The overview of different gnomonic projections can be found in [11]. ...
... These issues motivated the development of global cloud-resolving models (GCRMs) or global convectionpermitting models, such as NICAM (Satoh et al., 2008;Tomita et al., 2005), ICON (Zängl et al., 2015), and MPAS (Skamarock et al., 2012); in these models, cumulus drafts and associated microphysical processes are explicitly treated in relatively high resolution. Many more models have been developed and joined intercomparison projects, such as DYAMOND (Stevens et al., 2019). ...