Jun Uetake
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View article: CH4 emissions from runoff water of Alaskan mountain glaciers
CH4 emissions from runoff water of Alaskan mountain glaciers Open
Recent studies have observed high methane concentrations in runoff water and the ambient air at various glacier sites, including the Greenland Ice Sheet, the glacier forefield in Svalbard, and the ice cap in Iceland. This study extends the…
View article: Microbiomic Analysis of Bacteria Associated with Rock Tripe Lichens from Alpine Areas in Eastern Alps and Equatorial Africa
Microbiomic Analysis of Bacteria Associated with Rock Tripe Lichens from Alpine Areas in Eastern Alps and Equatorial Africa Open
The diversity of bacteria associated with alpine lichens was profiled. Lichen samples belonging to the Umbilicariaceae family, commonly known as rock tripe lichens, were gathered from two distinct alpine fellfields: one situated on Mt. Bre…
View article: Methane concentration in the discharge water and ambient air near the outlet of Glaciers, Alaska Range, 2022-2023
Methane concentration in the discharge water and ambient air near the outlet of Glaciers, Alaska Range, 2022-2023 Open
Methane release is considered to be from human activities, Arctic Ocean, and the terrestrial regions such as wetland, lakes, geological seeps in the Arctic although glaciers have not been considered a source of methane emissions. A large a…
View article: Difference in seasonal variation between airborne prokaryotic and eukaryotic communities in Ny-Ålesund, Svalbard
Difference in seasonal variation between airborne prokaryotic and eukaryotic communities in Ny-Ålesund, Svalbard Open
The Arctic region is undergoing rapid environmental changes due to global climate warming. Among the Arctic regions, the surface temperature in the northern Barents Sea, where the Svalbard archipelagos are located, has increased more signi…
View article: CH4 emission from runoff water of Alaskan mountain glaciers
CH4 emission from runoff water of Alaskan mountain glaciers Open
Methane (CH4) emissions from runoff water (RW) were observed at the terminus of glaciers in Alaska. The observed CH4 concentration was three times higher than ambient air and a high level of dissolved CH4 in RW was also measured. Although …
View article: Dense spatial variation of the eukaryotic and prokaryotic communities on the Gulkana Glacier, Alaska
Dense spatial variation of the eukaryotic and prokaryotic communities on the Gulkana Glacier, Alaska Open
Glacier retreat due to the warming climate is remarkable all over the world. In addition to climate warming, the “biological albedo reduction”, which the pigmented algae reduce the albedo of the glacier, enhances ice melting. T…
View article: Spatiotemporal changes in communities of snow-ice microbes living on Gulkana Glacier, Alaska
Spatiotemporal changes in communities of snow-ice microbes living on Gulkana Glacier, Alaska Open
Snow-ice microbes, which adapted to harsh conditions such as low temperature and high dose of UV, inhabit the cryospheric environments. They cause unique phenomena represented by colored snow and ice occurring with blooms of snow and glaci…
View article: Modeling seasonal growth of phototrophs on bare ice on the Qaanaaq Ice Cap, northwestern Greenland
Modeling seasonal growth of phototrophs on bare ice on the Qaanaaq Ice Cap, northwestern Greenland Open
Glacier phototroph blooms on the surfaces of ice sheets and glaciers cause albedo reduction, leading to increased melting rates. We observed seasonal changes in the abundance of phototrophs on the Qaanaaq Ice Cap in northwestern Greenland …
View article: Data set used in glacier algae and filamentous cyanobacteria models
Data set used in glacier algae and filamentous cyanobacteria models Open
This is a data set for using the glacier algae and filamentous cyanobacteria models (Onuma et al., 2022). The content is as below. - data: observed data (bio-volume, cell count, mineral weight, EC, pH and meteorological conditions) on the …
View article: Data set used in glacier algae and filamentous cyanobacteria models
Data set used in glacier algae and filamentous cyanobacteria models Open
This is a data set for using the glacier algae and filamentous cyanobacteria models (Onuma et al., 2022). The content is as below. - data: observed data (bio-volume, cell count, mineral weight, EC, pH and meteorological conditions) on the …
View article: Data set used in glacier algae and filamentous cyanobacteria models
Data set used in glacier algae and filamentous cyanobacteria models Open
This is a data set for using the glacier algae and filamentous cyanobacteria models (Onuma et al., under review). The content is as below. - data: observed data (bio-volume, cell count, mineral weight, EC, pH and meteorological conditions)…
View article: Spatial Distribution of Unique Biological Communities and Their Control Over Surface Reflectivity of the Stanley Glacier, Uganda
Spatial Distribution of Unique Biological Communities and Their Control Over Surface Reflectivity of the Stanley Glacier, Uganda Open
Diverse microbes have been revealed to live in glaciers worldwide, but only a few biological studies were dedicated to glaciers in tropical Africa. These glaciers are shrinking rapidly and are expected to disappear shortly. In this study, …
View article: Data set used in glacier algae and filamentous cyanobacteria models
Data set used in glacier algae and filamentous cyanobacteria models Open
This is a data set for using the glacier algae and filamentous cyanobacteria models (Onuma et al., under review). The content is as below. - data: observed data (bio-volume, mineral weight, EC, pH and meteorological conditions) on the bare…
View article: Ice Nucleating Particle Connections to Regional Argentinian Land Surface Emissions and Weather During the Cloud, Aerosol, and Complex Terrain Interactions Experiment
Ice Nucleating Particle Connections to Regional Argentinian Land Surface Emissions and Weather During the Cloud, Aerosol, and Complex Terrain Interactions Experiment Open
Here, we present a multi‐season study of ice‐nucleating particles (INPs) active via the immersion freezing mechanism, which took place in north‐central Argentina, a worldwide hotspot for mesoscale convective storms. INPs were measured untr…
View article: Cryoconite – From minerals and organic matter to bioengineered sediments on glacier's surfaces
Cryoconite – From minerals and organic matter to bioengineered sediments on glacier's surfaces Open
Cryoconite is a mixture of mineral and organic material covering glacial ice, playing important roles in biogeochemical cycles and lowering the albedo of a glacier surface. Understanding the differences in structure of cryoconite across th…
View article: Spatial and Temporal Variations in Pigment and Species Compositions of Snow Algae on Mt. Tateyama in Toyama Prefecture, Japan
Spatial and Temporal Variations in Pigment and Species Compositions of Snow Algae on Mt. Tateyama in Toyama Prefecture, Japan Open
Snow algae are photosynthetic microbes that inhabit the melting snow surface in alpine and polar regions. We analyzed the pigment and species composition of colored snow collected on Mt. Tateyama in Japan during the melting seasons of 2015…
View article: Studies on Atmosphere, Snow/Ice, and Glacial Microbes on Greenland Ice Sheet by SIGMA and relevant projects
Studies on Atmosphere, Snow/Ice, and Glacial Microbes on Greenland Ice Sheet by SIGMA and relevant projects Open
北極域で現在急激に進行している温暖化は,海面上昇や大気の遠隔影響を通じて地球規模の環境変動をもたらすと考えられる.グリーンランド氷床の表面融解は様々な不確定性を含み,正確な将来予測を行う上で解明すべき課題となっている.地球温暖化のもとでグリーンランド氷床の大気,雪氷,雪氷微生物がどのように氷床変動に影響するかを明らかにするため,2011 年度から2019 年度にかけてSIGMA 及びSIGMA-II プロジェクトが実施された.また,平行してGRENE,ArCS といった大型…
View article: Seasonal Trends of Atmospheric Ice Nucleating Particles Over Tokyo
Seasonal Trends of Atmospheric Ice Nucleating Particles Over Tokyo Open
Ice nucleating particles (INPs) originating from Asia are expected to have large impacts on aerosol‐cloud‐precipitation interactions on local, regional, and global scales. However, their seasonal variability is poorly understood. Here, we …
View article: A hole in the nematosphere: tardigrades and rotifers dominate the cryoconite hole environment, whereas nematodes are missing
A hole in the nematosphere: tardigrades and rotifers dominate the cryoconite hole environment, whereas nematodes are missing Open
The worldwide distribution of microinvertebrates on glaciers, the coldest biome, is poorly known. Owing to their tolerance to hostile conditions, small size and dispersal abilities, nematodes, tardigrades and rotifers are considered cosmop…
View article: Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer
Airborne bacteria confirm the pristine nature of the Southern Ocean boundary layer Open
Microorganisms are ubiquitous and highly diverse in the atmosphere. Despite the potential impacts of airborne bacteria found in the lower atmosphere over the Southern Ocean (SO) on the ecology of Antarctica and on marine cloud phase, no pr…
View article: Novel yeast taxa from the cold: description of Cryolevonia giraudoae sp. nov. and Camptobasidium gelus sp. nov.
Novel yeast taxa from the cold: description of Cryolevonia giraudoae sp. nov. and Camptobasidium gelus sp. nov. Open
Twenty-one psychrophilic yeast isolates related to the Camptobasidiaceae family in the Microbotryomycetes class were obtained from ice collected from cold environments worldwide. A new psychrophilic species from the recently described genu…
View article: Thawing permafrost: an overlooked source of seeds for Arctic cloud formation
Thawing permafrost: an overlooked source of seeds for Arctic cloud formation Open
As the Arctic warms at twice the global rate, radiative feedbacks from clouds will lead to compounding impacts on the surface energy budget that affect both regional and global weather, and climate. In a future warmer world, the Arctic is …
View article: Seasonal Changes of Airborne Bacterial Communities Over Tokyo and Influence of Local Meteorology
Seasonal Changes of Airborne Bacterial Communities Over Tokyo and Influence of Local Meteorology Open
In order to study airborne bacterial community dynamics over Tokyo, including fine-scale correlations between airborne microorganisms and meteorological conditions, and the influence of local versus long-range transport of microbes, air sa…
View article: Bacterial community changes with granule size in cryoconite and their susceptibility to exogenous nutrients on NW Greenland glaciers
Bacterial community changes with granule size in cryoconite and their susceptibility to exogenous nutrients on NW Greenland glaciers Open
Cryoconite granules are dark-colored biological aggregates on glaciers. Bacterial community varies with granule size, however, community change in space and their susceptibility to environmental factors has not been described yet. Therefor…
View article: Seasonal changes of airborne bacterial communities over Tokyo and influence of local meteorology
Seasonal changes of airborne bacterial communities over Tokyo and influence of local meteorology Open
Recent progress in Next Generation Sequencing allows us to explore the diversity of airborne microorganisms across time and space. However, few studies have used consecutive short-period samples to explore correlations between the seasonal…
View article: Bacterial community changes with cryoconite granule size and their susceptibility to exogenous nutrients on 10 glaciers in northwestern Greenland
Bacterial community changes with cryoconite granule size and their susceptibility to exogenous nutrients on 10 glaciers in northwestern Greenland Open
Cryoconite granules, which are dark-colored biological aggregates on glaciers, effectively accelerate the melting of glacier ice. Bacterial community varies with granule size, however, community change in space and their susceptibility to …
View article: Greenland_sequence_table.txt
Greenland_sequence_table.txt Open
This sequence table was analyzed in the manuscript/paper "Bacterial community changes with cryoconite granule size and their susceptibility to exogenous nutrients on 10 glaciers in northwestern Greenland".