Observations in ice-rich permafrost systems, Prudhoe Bay Alaska, 2020-21 (AGC Data Report 22-01)

The NNA Track 1 project Landscape evolution and adapting to change in ice-rich permafrost systems (NNA-IRPS) is investigating how climate change and infrastructure affect ice-rich permafrost systems (IRPS); the roles ecosystems play in the development and degradation of IRP; and how people and infrastructure can adapt to changes in IRPS. NNA-IRPS research at the Prudhoe Bay Oilfield (PBO), Alaska, is focused on (1) how differences in vegetation, soils, water, and time influence the accumulation and degradation of ground ice in IRP landscapes; and (2) how the loss of ground ice can radically change these landscapes, their components, and the infrastructure built on them. This data report covers data and preliminary analysis from the 2020 and 2021 field seasons at Prudhoe Bay research sites including overviews of the tasks, field team, schedule, and logistics for each year, followed by summaries of research methods and results by team members: (1) remote sensing activities (Daanen and Jones); (2) observations along research transects (Walker et al.); (3) observations from terrestrial vegetation plots (Walker and Breen); (4) thermokarst-pond vegetation and environments (Watson-Cook); (5) trace-gas fluxes (Kade); (6) basal peat dating (Bergstedt), (7) permafrost borehole temperature stations (Nicolsky and Romanovsky); and (8) permafrost cryostructure (Kanevskiy and Shur). Data tables are grouped into seven appendices in this PDF volume and area also archived as separate datasets for each field season in the Arctic Data Center.NNA轨道1项目「富冰多年冻土系统（ice-rich permafrost systems, IRPS）的景观演化与适应变化」（NNA-IRPS）旨在探究气候变化与基础设施如何作用于富冰多年冻土系统；明确生态系统在富冰多年冻土发育与退化过程中所发挥的作用；以及厘清人类与基础设施如何适配富冰多年冻土系统的变化。该项目在阿拉斯加普拉德霍湾油田（Prudhoe Bay Oilfield, PBO）开展的研究聚焦于两大核心方向：其一，植被、土壤、水文与时间维度的差异如何影响富冰多年冻土景观中地下冰的积累与退化；其二，地下冰的消融会如何彻底重塑这类景观、其组成要素以及其上修建的各类基础设施。本数据报告涵盖了2020年与2021年普拉德霍湾研究站点野外考察季的相关数据与初步分析成果，内容首先包含各年度的研究任务、野外团队、日程安排与后勤保障概况，随后按研究小组梳理了各项研究的方法与成果总结：(1) 遥感相关工作（达嫩与琼斯）；(2) 研究样带观测（沃克等）；(3) 陆地植被样地观测（沃克与布林）；(4) 热融湖塘（thermokarst-pond）植被与环境研究（沃森-库克）；(5) 痕量气体通量观测（卡德）；(6) 基底泥炭测年（贝格施泰特）；(7) 多年冻土钻孔温度监测站相关研究（尼科尔斯基与罗曼诺夫斯基）；(8) 多年冻土冰结构（permafrost cryostructure）研究（卡涅夫斯基与舒尔）。本PDF文档中的数据表被整理为7个附录，同时各野外考察季的独立数据集也已归档至北极数据中心（Arctic Data Center）。