We explore the spatial and temporal variations in denudation rates in the northern Pamir—Tian Shan region using ¹⁰Be-derived denudation rates from modern (n = 110) and buried sediment (2.0–2.7 Ma; n = 3), and long-term exhumation rates from published apatite fission track (AFT; n = 705) and apatite (U-Th-Sm)/He (AHe; n = 211) thermochronology. We found moderate correlations between denudation rates and topographic metrics and weak correlations between denudation rates and annual rainfall, highlighting complex linkages among tectonics, climate, and surface processes that vary locally. The ¹⁰Be data show a spatial trend of decreasing modern denudation rates from west to east, suggesting that deformation and precipitation control denudation in the northern Pamir and western Tian Shan. Farther east, the denudational response of the landscape to Quaternary glaciations is more pronounced and reflected in our data. Modern ¹⁰Be denudation rates are generally higher than the long-term AFT and AHe exhumation rates across the studied area. In the Kyrgyz Tian Shan, on average, the highest ¹⁰Be denudation rates are recorded in the Terskey range, south of Lake Issyk-Kul. Here, modern denudation rates are higher than ¹⁰Be-derived paleo-denudation rates, which are comparable in magnitude with the long-term exhumation rates inferred from AFT and AHe. We propose that denudation in the region, particularly in the Terskey range, remained relatively steady during the Neogene and early Pleistocene. Denudation increased due to glacial-interglacial cycles in the Quaternary, but this occurred after the onset and intensification of the Northern Hemisphere glaciations at 2.7 Ma.

中文翻译：

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从宇宙成因10Be和低温热年代学推断第四纪冰川作用对北帕米尔—天山剥蚀率的影响

我们利用来自现代（ n  = 110）和埋藏沉积物（2.0–2.7 Ma；n = 3）的¹⁰ Be衍生剥蚀率和 长期剥蚀率探索了帕米尔高原北部-天山地区剥蚀率的时空变化。已发表的磷灰石裂变径迹（AFT；n  = 705）和磷灰石（U-Th-Sm）/He（AHe；n  = 211）热年代学的折返率。我们发现剥蚀率和地形指标之间存在适度的相关性，而剥蚀率和年降雨量之间的相关性较弱，这突显了局部变化的构造、气候和地表过程之间的复杂联系。10 Be数据显示出现代剥蚀率自西向东递减的空间趋势，表明变形和降水控制了帕米尔高原北部和天山西部的剥蚀^。在更远的东部，地貌对第四纪冰川作用的剥蚀反应更加明显，并反映在我们的数据中。现代¹⁰ Be 剥蚀率通常高于研究区域的长期 AFT 和 AHe 剥蚀率。在吉尔吉斯斯坦天山，平均而言，最高的¹⁰ Be 剥蚀率出现在伊塞克湖以南的特尔斯基山脉。这里，现代剥蚀率高于¹⁰ Be 衍生的古剥蚀率，其大小与 AFT 和 AHe 推断的长期剥蚀率相当。我们认为，该地区的剥蚀，特别是在特斯基山脉，在新近纪和早更新世期间保持相对稳定。由于第四纪的冰期-间冰期循环，剥蚀增加，但这发生在北半球2.7 Ma冰川作用开始和加剧之后。