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Grassland degradation poses a serious threat to biodiversity, ecosystem services, and human well-being. In this study, we investigated grassland degradation in Zhaosu County, China, between 2001 and 2020, and analyzed the impacts of climate change and human activities using the Miami model. The actual net primary productivity (ANPP) obtained with...

Assessing heat-related health risks is important for sustainable urban development. Although fine-scale information (e.g., at the community/neighborhood or city block level) is ideal for identifying and mitigating these risks, previous studies have preferred to work at the administrative unit level. High-resolution Local Climate Zone (LCZ) maps, i...

Accurate urban morphology provided by Local Climate Zones (LCZ), a universal surface classification scheme, offers opportunities for studies of urban heat risk, urban ventilation, and transport planning. In recent years, researchers have attempted to generate LCZ maps worldwide with the World Urban Database and Access Portal Tools (WUDAPT). However...

Increasing resilience to natural hazards and climate change is critical for achieving many Sustainable Development Goals (SDGs). In recent decades, China has experienced rapid economic development and became the second-largest economy in the world. This rapid economic expansion has led to large-scale changes in terrestrial (e.g., land use and land...

The Himalaya and Hindu Kush Region (HKH) is one of the world's most fragile ecosystems in terms of climate change and its impacts, such as, slow- and fast-onset disasters. Traditionally, nature and human beings have co-existed in this area with indigenous and local knowledge (ILK) systems and practices being used in different ways, such as for...

Research on the service values of urban ecosystems is a hot topic of ecological studies in the current era of rapid urbanization. To quantitatively estimate the ecosystem service value in Chengdu, China from the perspectives of natural ecology and social ecology, the technologies of remote sensing (RS) and geographic information system (GIS) are...

Debris cover on glacier surfaces hampers the accurate detection of debris-covered ice using traditional techniques based on image band ratios. Therefore, this study tests a new automatic classification scheme for hierarchical mapping of glacier surfaces based on machine learning classifiers including k-nearest neighbors (KNN), support vector...

中国では、耕作地を林地に整備する「退耕還林」政策が、環境対策から気候変動対策に移行しつつある重要な節目を迎えている。生態系保全などの成果があったものの、目的と反する事例も多発し、政策の見直しに迫られているからだ。 　中国人口は２０２１年、14億１２６０万人と過去最高を更新し、１９６０年の2倍に増えた。それに伴い、食料需要に向けた大規模な森林伐採や開墾が進んだ。結果、深刻な土壌流失が発生した。９０年代に実施した第1回全国土地資源調査によると、国土の3分の1に当たる3億６７００万ヘクタールの土壌が流失した。

（Japanese title: 熱帯林違法伐採の検知（JJ-FAST）） This submission provides our input for the first Global Stocktake under the Paris Agreement. Our input focuses on a satellite-based deforestation monitoring system for tropical forests, “JICA-JAXA Forest Early Warning System in the Tropics (JJ-FAST)”. Summary of the submission: A satellite-based deforestation...

2020 年 9 月 22 日に開かれた国連 75 周年総会の一般討論演説において、中国習近平国家主席（以下、習主席）は、「 2030 年より前に二酸化炭素の排出のピークを達成し（ 2030 年目標）、 2060 年より前に炭素中立（カーボンニュートラル。以下、 2060 年目標）を達成するように尽力」することを表明した。同年 12 月 12 日に開催された世界気候サミットの場にて、習主席は、 2030 年より早い時期でのピークアウトの達成を強調し、 2030 年まで、① GDP 比 CO₂ 排出量を 2005 年に比べ 65% 以上削減する、②一次エネルギーに占める非化石エネルギーの割合を 25% 前後にする、という目標を発表した（ 2030 年強化目標）。中国政府は、 2030...