多光谱传感器

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中国团队解读卫星遥感如何守护“地球水塔”:全方位监测冰川变化
Huan Qiu Wang Zi Xun· 2025-06-05 12:46
Core Viewpoint - The article emphasizes the critical role of glaciers as indicators of climate change and their impact on global environmental conditions, highlighting the importance of satellite remote sensing in monitoring glacier changes and enhancing human adaptation to climate change [1][2]. Group 1: Glacier Monitoring and Remote Sensing - Satellite remote sensing has become the primary method for comprehensive monitoring of glacier changes, allowing for timely understanding of glacier trends and disaster prevention [5][6]. - The monitoring techniques include multi-spectral, synthetic aperture radar, and laser radar sensors, which provide a detailed record of glacier area, movement, thickness changes, and balance lines [6][8]. - Optical remote sensing can identify glacier outlines, while synthetic aperture radar is sensitive to surface roughness and moisture content, enabling detailed analysis of glacier structure and seasonal variations [8][11]. Group 2: Climate Change and Glacier Impact - Climate change significantly affects glacier dynamics, with implications for surrounding arid and semi-arid regions, human livelihoods, and sea level changes [2][9]. - The melting of glaciers and ice caps contributes to rising sea levels, posing threats to small island nations and coastal cities [9][10]. - The United Nations has designated 2025 as the International Year of Glacier Protection to address the ecological crises caused by accelerated glacier melting and to raise public awareness about glacier conservation [2][10]. Group 3: Sustainable Development and Future Pathways - Monitoring glaciers is essential not only for current environmental protection but also for ensuring sustainable development in the future [10]. - The integration of technology in glacier observation supports climate action goals and sustainable development objectives, aiming to safeguard the environment for future generations [10].
农学专家分赴我省多地助力农作物抗旱
Xin Hua Ri Bao· 2025-05-02 23:20
Core Insights - The article highlights the impact of drought conditions on wheat and peach crops in Jiangsu province, emphasizing the need for effective irrigation strategies to mitigate the effects of insufficient rainfall [1][2][3] Group 1: Drought Conditions and Agricultural Impact - The average temperature in Jiangsu province reached a record high for April, while precipitation was 40% below normal, leading to significant drought stress on crops [1] - Over 4 million acres of wheat are currently affected by drought, coinciding with critical growth stages for the crop [2] - Soil moisture levels are a concern for peach farmers, who are advised to use drip irrigation to ensure adequate water supply without overwatering [2] Group 2: Innovative Irrigation Solutions - A "空—地" (air-ground) collaborative smart irrigation system has been developed, utilizing drones and IoT sensors to monitor crop health and soil moisture in real-time [3] - This system allows for data-driven irrigation decisions, improving water use efficiency by 30% to 50% compared to traditional methods [3] Group 3: Research and Development in Drought Resistance - Research teams at Yangzhou University are working on breeding drought-resistant crop varieties, with a focus on maize root systems [4][5] - The use of gene editing technology is expected to lead to the development of drought-resistant varieties within 7 to 10 years, contributing to global food security [5]