Yoshinobu Harazono
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View article: The JapanFlux2024 dataset for eddy covariance observations covering Japan and East Asia from 1990 to 2023
The JapanFlux2024 dataset for eddy covariance observations covering Japan and East Asia from 1990 to 2023 Open
Eddy covariance observations play a pivotal role in understanding the land–atmosphere exchange of energy, water, carbon dioxide (CO2), and other trace gases, as well as the global carbon cycle and earth system. To promote the networking of…
View article: The JapanFlux2024 dataset for eddy covariance observations covering Japan and East Asia from 1990 to 2023
The JapanFlux2024 dataset for eddy covariance observations covering Japan and East Asia from 1990 to 2023 Open
Eddy covariance observations play a pivotal role in understanding the land–atmosphere exchange of energy, water, carbon dioxide (CO2), and other trace gases, as well as the global carbon cycle and earth system. To promote the networking of…
View article: Anomalous wet summers and rising atmospheric CO <sub>2</sub> concentrations increase the CO <sub>2</sub> sink in a poorly drained forest on permafrost
Anomalous wet summers and rising atmospheric CO <sub>2</sub> concentrations increase the CO <sub>2</sub> sink in a poorly drained forest on permafrost Open
At the northern high latitudes, rapid warming, associated changes in the hydrological cycle, and rising atmospheric CO 2 concentrations, [CO 2 ], are observed at present. Under rapid environmental changes, it is important to understand the…
View article: Interannual Variations in Spring Snowmelt Timing of Alaskan Black Spruce Forests Using a Bulk‐Surface Energy Balance Approach
Interannual Variations in Spring Snowmelt Timing of Alaskan Black Spruce Forests Using a Bulk‐Surface Energy Balance Approach Open
Spring snowmelt occurs for a short duration on an annual time scale, but their timings considerably affect the carbon and hydrological cycle in high‐latitude ecosystems. Here, we developed a simple snowmelt model, treating the ecosystem su…
View article: Evaluating the Drought Code for lowland taiga of Interior Alaska using eddy covariance measurements
Evaluating the Drought Code for lowland taiga of Interior Alaska using eddy covariance measurements Open
Background The Drought Code (DC) of the Canadian Fire Weather Index System (CFWIS) has been intuitively regarded by fire managers in Alaska, USA, as poorly representing the moisture content in the forest floor in lowland taiga forests on p…
View article: Spring onsets of a young forest in interior Alaska determined based on time‑lapse camera and eddy covariance measurements
Spring onsets of a young forest in interior Alaska determined based on time‑lapse camera and eddy covariance measurements Open
Spring phenology is essential in modeling the carbon balance of high‑latitude ecosystems and is possibly sensitive to climate change. In the present study, we evaluated the onset of the growing season for three species (paper birch, bog bl…
View article: Lessons learned from more than a decade of greenhouse gas flux measurements at boreal forests in eastern Siberia and interior Alaska
Lessons learned from more than a decade of greenhouse gas flux measurements at boreal forests in eastern Siberia and interior Alaska Open
We summarized our recently-published papers on greenhouse gas exchanges at two important boreal regions underlain by permafrost: eastern Siberia and interior Alaska. Relevant literatures were also referred to, and future research direction…
View article: Cooling and Moistening of the Planetary Boundary Layer in Interior Alaska Due to a Postfire Change in Surface Energy Exchange
Cooling and Moistening of the Planetary Boundary Layer in Interior Alaska Due to a Postfire Change in Surface Energy Exchange Open
Key Points Regional climate via PBL dynamics was estimated using measurements of surface energy exchange and mixed‐layer model in interior Alaska Regional cooling and moistening were estimated due to fire‐induced land cover change from a m…
View article: Leaf- and ecosystem-scale photosynthetic parameters for the overstory and understory of boreal forests in interior Alaska
Leaf- and ecosystem-scale photosynthetic parameters for the overstory and understory of boreal forests in interior Alaska Open
Photosynthetic parameters are key for predicting the carbon cycle and fluxes in terrestrial ecosystems. In northern high-latitude regions where cold temperatures limit available nitrogen for plants, the photosynthetic parameters are tightl…
View article: Pioneering contributions by Eiichi Inoue and forerunners on the establishment of flux study
Pioneering contributions by Eiichi Inoue and forerunners on the establishment of flux study Open
Flux study has in an important position in earth science today. Pioneering flux studies were considered to learn the background of the todays’ prosperity, the philosophy and methods of pioneers for the next progress. Dr. Eiichi Inoue devel…
View article: A multi-scale comparison of modeled and observed seasonal methane emissions in northern wetlands
A multi-scale comparison of modeled and observed seasonal methane emissions in northern wetlands Open
Wetlands are the largest global natural methane (CH4) source, and emissions between 50 and 70° N latitude contribute 10–30 % to this source. Predictive capability of land models for northern wetland CH4 emissions is still low due to limite…
View article: A multi-scale comparison of modeled and observed seasonal methane cycles in northern wetlands
A multi-scale comparison of modeled and observed seasonal methane cycles in northern wetlands Open
Wetlands are the single largest global natural methane (CH4) source, and emissions between 50°N and 70°N latitude contribute 10–30 % to this source. Predictive capability of northern wetland CH4 emissions is still low due to limited site m…
View article: Latitudinal gradient of spruce forest understory and tundra phenology in Alaska as observed from satellite and ground-based data
Latitudinal gradient of spruce forest understory and tundra phenology in Alaska as observed from satellite and ground-based data Open
The latitudinal gradient of the start of the growing season (SOS) and the end of the growing season (EOS) were quantified in Alaska (61°N to 71°N) using satellite-based and ground-based datasets. The Alaskan evergreen needleleaf forests ar…