另一篇2025年发表于《气候变化研究进展》的论文，则对吉林省长白山地区1991年至2023年间的冰雪运动气候适宜性进行了定量评估。研究构建了冰雪运动气候指数（ISCI），发现该地区冬季平均气温总体呈缓慢增加趋势，区域平均ISCI随时间推进有减小的趋势。
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An animated sequence quantised using error-diffusion dithering. Note the jittering artifacts present in the background.
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I found one dumb free win (I mistakenly used value receivers on a utility function called on a large struct thousands of times a frame). But the rest of the speedups I found took more effort.