Taliks are bodies or layers of unfrozen ground in permafrost areas. Recent research on taliks has been driven largely by the potential for release of greenhouse gases as taliks expand, and engineering challenges associated with thawing permafrost. Observations of talik configuration and development have been assisted by advances in geophysical techniques that complement mechanical and thermal measurements. Suprapermafrost taliks have been observed in a range of settings associated with disturbance from wildfire and infrastructure. These features are included in a revised talik classification scheme presented in this paper. Observations of methane release have renewed interest in lake talik initiation and development, resulting in substantial efforts to model thaw lake expansion. Hotspots of methane release have also been identified at saline springs. Recent simulations indicate that groundwater flow can significantly accelerate talik expansion and that incorporating heat advection may be required for accurate transient simulations. Ongoing global warming is expected to exacerbate the effects of surface disturbances on talik development and limit the ability of permafrost to recover in marginal permafrost areas.

中文翻译：

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taliks 研究的最新进展（2010-2019）

Taliks 是永久冻土区中未冻结地面的物体或层。最近对 taliks 的研究主要是由于随着 taliks 的扩张而释放温室气体的潜力，以及与永久冻土融化相关的工程挑战。对 talik 构造和发展的观察得到了地球物理技术进步的帮助，这些技术补充了机械和热测量。在与野火和基础设施干扰相关的一系列环境中观察到了超冻土层。这些特征包含在本文提出的修订后的 talik 分类方案中。对甲烷释放的观察重新引起了人们对塔利克湖的形成和发展的兴趣，从而为模拟解冻湖扩张做出了大量努力。在盐泉中也发现了甲烷释放的热点。最近的模拟表明，地下水流可以显着加速 talik 膨胀，准确的瞬态模拟可能需要结合热平流。预计持续的全球变暖将加剧地表扰动对 talik 发展的影响，并限制永久冻土在边缘永久冻土地区恢复的能力。