Climatic Controls on Continental Erosion and Sediment Transport

虽然已知构造力主要通过驱动基岩隆起对沉积物的生成施加强有力的主要控制，但全球和区域气候在控制沉积物的生成、运输和分布方面也发挥着动态作用。气候是如何调节沉积记录的？在什么样的条件下，侵蚀信号可以被观察到，并根据古环境和古气候变化进行明确的解释？本次美国地质学会（GSA）彭罗斯会议的主要目标是：i）重新定义研究的现状，并确定该科学界中剩余的关键问题，ii）介绍和讨论在理解直接和间接由古气候和古环境变化介导的侵蚀记录方面的最新进展，iii）加强早期职业研究人员（ECR）的培训，通过国际科学家之间的联网和讨论，特别是来自传统上代表性不足的社区，以及iv）在本次会议之后制作GSA特别出版物。该奖项支持15名学生和ECR以及三名职业生涯中期的美国女性科学家的参与，这些科学家缺乏支持，但对关键的指导活动至关重要。虽然人们长期以来一直认为冰川作用和较强的降水会增加基岩侵蚀，但气候，侵蚀和沉积物运输过程之间的关系比侵蚀和构造之间的关系更为复杂。很明显，这些关系很少是线性的，而且在不同的观测时间尺度和不同的构造环境中也各不相同。虽然气候-构造-侵蚀的相互作用一直是过去许多讲习班的主题，但气候对侵蚀和沉积物迁移的影响，特别是在较短的时间尺度上，受到的审查较少。本次GSA彭罗斯会议将于2019年8月初与70-80名与会者讨论这些问题。该小组将从各种子学科中抽调，以进一步定义和量化这些过程之间的相互关系。这是一个重新确定社区目标和进行综合的特别有利的时机，因为通过国际倡议收集了大量新的气候记录和长期沉积记录，最值得注意的是洞穴沉积物和最近从IODP获得的季风记录。侵蚀产物测年技术、沉积物来源追踪技术和气候-景观耦合系统建模技术的进步，使我们能够更有信心地作出更好的相关性，并进一步加深我们对驱动和反应性物理过程的基本理解。该奖项由地球科学部的地貌学和土地利用动力学（GLD）计划，沉积地质学和古生物学（SGP）计划，构造学（TE）计划和气候变化古展望（P2 C2）计划共同资助。以及刺激竞争研究的既定计划（EPSCoR）该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Although tectonic forces are known to exert a strong primary control over the generation of sediment, mostly through driving bedrock uplift, global and regional climate also play a dynamic role in controlling the production, transport, and distribution of sediments. How does climate mediate the sedimentary record and under what conditions can erosional signals be observed and interpreted unambiguously in terms of paleoenvironmental and paleoclimatic change? The primary goals of this Geological Society of America (GSA) Penrose conference are i) to redefine the current state of research and identify the remaining key questions within this scientific community, ii) to present and discuss recent advances in understanding erosional records mediated directly and indirectly by paleoclimate and paleoenvironmental change, iii) to enhance the training of early career researchers (ECRs), especially from traditionally underrepresented communities, through networking and discussion among international scientists, and iv) to produce a GSA Special Publication following the proceedings of this conference. This award supports the participation of 15 student and ECRs, and three mid-career U.S. female scientists who lack support and are essential for critical mentoring activities.While it has long been recognized that bedrock erosion is increased by glaciation and heavier precipitation, the relationship among climatic, erosional, and sediment transport processes is more complex than that defined between erosion and tectonics. It has become clear that these relationships are rarely linear and furthermore vary across timescales of observation and within different tectonic settings. While climate-tectonic-erosion interactions have been the subject of numerous past workshops the influence of climate on erosion and sediment transport, especially on shorter timescales, has received less scrutiny. This GSA Penrose conference will address these issues with a group of 70-80 attendees in early August 2019. The group will be drawn from a variety of subdisciplines to further define and quantify the interrelationships amongst these processes. This is an especially opportune time to redefine community goals and undertake this synthesis because of the wealth of new climate records and long-term sedimentary records collected through international initiatives, most notably speleothem and the recently acquired monsoon records from IODP. Advances in techniques for dating erosional products, in tracing sediment sources, and modelling coupled climate-landscape systems now allow for much improved correlations to be made with greater confidence and further our fundamental understanding of the driving and reactive physical processes. This award was jointly funded by the Geomorphology and Land-use Dynamics (GLD) Program, the Sedimentary Geology and Paleobiology (SGP) Program, the Tectonics (TE) Program, and the Paleoperspectives on Climate Change (P2C2) Program in the Division of Earth Sciences, as well as the Established Program to Stimulate Competitive Research (EPSCoR) in the Office of Integrative Activities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.