原标题：青藏高原人工草地面积 34年来增加2.4倍 科技日报讯 （记者颉满斌）记者7月7日从兰州大学获悉，该校教授贺金生团队研究发现，从1988 年到2021年，青藏高原人工草地面积增加了2.4倍，其中青海省的增长尤为突出。相关研究日前发表在 国际期刊《地球系统科学数据》上。 受气候变化和人类活动增强的影响，过去30年间，青藏高原部分地区的天然草地出现了不同程度的 退化。人工草地是天然草地的补充，其快速发展带来的生态影响引发学界关注。 贺金生团队构建的随机森林二值分类模型，使用了精选训练样本训练，而后在两个气候地貌迥异的 试验区进行验证，结果显示，模型总体精度达97%，表明该模型适用于青藏高原人工草地制图。研究首 次基于卫星遥感数据，构建了自1988年以来34年间的青藏高原人工草地分布数据集。 此外，研究表明，由于定义不统一，各类统计数据所反映的人工草地变化趋势与遥感数据并不完全 吻合，未来还需进一步科学评估天然草地转变为人工草地后所带来的生态和环境效应。 据介绍，该研究明确了青藏高原人工草地的空间分布信息，为促进青藏高原的生态保护和草牧业的 高质量发展提供了理论支撑。 "我们通过为期3年的大量野外考察，明确 ...

Core Viewpoint - The Chongqing Longxing Football Stadium, designed with the theme of "mountains and rivers," will host the 2026 World Cup qualifiers between China and Bahrain, showcasing a unique architectural style that reflects the local culture and environment [1][18]. Design and Architecture - The stadium covers an area of approximately 303 acres and features a design inspired by the mountainous terrain of Chongqing, with a tiered structure that mimics the natural landscape [1][5]. - The exterior uses parametric design with perforated aluminum panels to simulate the rough texture of mountain rocks, while the roof's wavy profile symbolizes the confluence of the Yangtze and Jialing Rivers [1][3]. - The seating arrangement is designed to ensure optimal sightlines for all spectators, with no obstructed views, enhancing the overall viewing experience [5][8]. Fan Experience - The stadium includes a "Super Fan Stand" with nearly 10,000 seats, making it the largest single stand in the country, designed to showcase fan culture and support for the national team [8]. - A large TIFO display is planned for the match, which will serve as a significant visual element during the game [8]. Turf and Maintenance - The stadium features a high-quality Bermuda grass pitch, which is currently being nurtured by a professional team, ensuring it meets FIFA standards for the upcoming match [10][12]. - The grass is designed to withstand high temperatures and provide a stable playing surface, with advanced drainage and ventilation systems in place to maintain optimal growing conditions [14][16]. Cultural Significance - The Longxing Football Stadium is not just a sports venue but a cultural symbol for the city, embodying the spirit of Chongqing and leaving a unique mark in sports architecture [18].