Soil-Frost Depth Change in Eastern Hokkaido under +2 K-World Climate Scenarios

Inatsu, Masaru; Tominaga, Junpei; Katsuyama, Yuta; Hirota, Tomoyoshi

doi:10.2151/sola.2016-032

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…Moreover, the change of snow quality has been shown to cause the earlier occurrence of wet avalanches in Western North America (Lazar and Williams, 2008), and to potentially increase avalanche activity in midwinter at high altitudes in France (Castebrunet and others, 2014). Moreover, climate change could lead to increased snowpack loss and thereby threaten water resources (Beniston, 2003), could have an impact on agriculture due to a reduction of soil-frost depth related to height of snow cover (HS) (Inatsu and others, 2016), and could lead to a reduction in the number of operating days at snow resorts (Uhlmann and others, 2009).…”

Section: Introductionmentioning

confidence: 99%

Response of snowpack to +2°C global warming in Hokkaido, Japan

2019

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The response of snowpack to a +2°C global warming relative to the present climate was estimated in Hokkaido, Japan, using a physical snowpack model driven by dynamically downscaled (DDS) data, after model evaluation. The evaluation revealed that the snowpack model successfully reproduced the height of snow cover (HS), snow water equivalent (SWE) and snow-covered days (SCDs), but had a moderate bias in the thickness ratios of melt form (MF) and hoar category (HC). The DDS-forced simulation predicted that the seasonal-maximum HS and SWE would decrease by 30–40% in the southwestern and eastern parts of Hokkaido due to a large decrease in snowfall during the accumulation period, and that the HS and SWE in the north would decrease, albeit not significantly due to uncertain atmospheric forcing. The number of SCDs in Hokkaido was predicted to decline by ~30 d. Additionally, ~50% of snowpack thickness during a season would be MF in most areas, whereas HC would be <50% all over Hokkaido.

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Section: Introductionmentioning

confidence: 99%

Response of snowpack to +2°C global warming in Hokkaido, Japan

2019

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“…Moreover, considering the utilization of water resources (Beniston, 2003), the mitigation of snow disaster (Nakai et al, 2012), and winter tourism (Beniston, 2003;Uhlmann et al, 2009), the impact of climate change on snowpack dynamics deserve to be examined (e.g. Niwano et al, 2012;Mellander et al, 2007;Inatsu et al, 2016), even though there is still inherent uncertainty in models of the impact of climate change.…”

Section: Introductionmentioning

confidence: 99%

Global warming response of snowpack at mountain range in northern Japan estimated using multiple dynamically downscaled data

Katsuyama

Inatsu

Nakamura

et al. 2017

Cold Regions Science and Technology

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We estimate the response of snowpack to global warming along with the uncertainty of the snowpack change by using a combination of multiple general-circulation models (GCMs), a single regional atmospheric model, and a one-dimensional multi-layered snowpack model. The target site is Mt. Annupuri in Kutchan, Hokkaido, Japan. The forcing of the snowpack model is taken from dynamically downscaled data from GCMs for the present climate and GCMs in a decade when the global-mean temperature has increased by 2 K from present conditions. The results show that global warming would decrease the monthly-mean snow depth throughout the winter season. Other salient features are the decrease of snow depth by 60 cm with maximum uncertainty of 20 cm at the beginning of the snow ablation period, the occurrence of the snow-depth peak a month earlier, and the dominance of melt forms in an earlier season. The ratio of melt forms for all snowpack layers increase with little uncertainty before the snow ablation period. The ratio of hoar does not change much, even though the air temperature increases. The uncertainty in snowpack evaluation is also discussed.

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“…In contrast, in the case of warm winter, soil freezing would be limited, and hence would not be sufficient to achieve the control of volunteer potatoes. However, the climate change scenarios for the Tokachi region 25 26 , i.e. mean air temperature in winter changes from current (−8 °C) to the late 21 st century (2081–2100; −5 °C), suggest that the D max of around 0.3 m can be achieved 3 .…”

Section: Discussionmentioning

confidence: 99%

Optimum soil frost depth to alleviate climate change effects in cold region agriculture

Yanai

Iwata

Hirota

2017

Sci Rep

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On-farm soil frost control has been used for the management of volunteer potatoes (Solanum tuberosum L.), a serious weed problem caused by climate change, in northern Japan. Deep soil frost penetration is necessary for the effective eradication of unharvested small potato tubers; however, this process can delay soil thaw and increase soil wetting in spring, thereby delaying agricultural activity initiation and increasing nitrous oxide emissions from soil. Conversely, shallow soil frost development helps over-wintering of unharvested potato tubers and nitrate leaching from surface soil owing to the periodic infiltration of snowmelt water. In this study, we synthesised on-farm snow cover manipulation experiments to determine the optimum soil frost depth that can eradicate unharvested potato tubers without affecting agricultural activity initiation while minimising N pollution from agricultural soil. The optimum soil frost depth was estimated to be 0.28–0.33 m on the basis of the annual maximum soil frost depth. Soil frost control is a promising practice to alleviate climate change effects on agriculture in cold regions, which was initiated by local farmers and further promoted by national and local research institutes.

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Soil-Frost Depth Change in Eastern Hokkaido under +2 K-World Climate Scenarios

Cited by 7 publications

References 25 publications

Response of snowpack to +2°C global warming in Hokkaido, Japan

Response of snowpack to +2°C global warming in Hokkaido, Japan

Global warming response of snowpack at mountain range in northern Japan estimated using multiple dynamically downscaled data

Optimum soil frost depth to alleviate climate change effects in cold region agriculture

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