Collaborative Research: Sensitivity of Circum-Arctic Peatland Carbon to Holocene Warm Climates and Climate Seasonality

合作研究：RUI：环北极泥炭地碳对全新世温暖气候和气候季节性的敏感性（pi: Zicheng Yu, David Beilman, Philip Camill）最近北极变暖的加速引起了陆地生态系统的广泛变化，包括碳动态。过去的气候变暖和记录在案的生态系统反应提供了来自地球的重要见解。了解和预测对未来气候变化的可能反应的美国历史。在这个项目中，来自利哈伊大学、夏威夷大学和鲍登学院的研究人员将评估？自然气候变暖实验？它们发生在全新世（过去12000年）的整个北极地区。他们将把重点放在两个温暖的气候间隔上：(1)全新世热极大期，时间范围在1万到6000年前之间；(2)大约1000年前温暖的中世纪气候异常期。这些资金被要求：(1)从几个关键地区（包括阿拉斯加、麦肯齐盆地、哈德逊湾低地、拉布拉多和堪察加）的富含碳的泥炭地收集新的样本；(2)对现有数据进行整合和综合；(3)与合作者一起进行气候-碳模型实验。在富含碳的北极生态系统中，温度和气候季节性是碳平衡的主要控制因素，这一观点对于预测未来北极碳的命运具有重要意义，因为预计未来的变暖主要发生在冬季。其他更广泛的影响包括：(1)支持新的教师职业发展；(2)培养本科生、研究生和博士后，强调传统上在自然科学领域代表性不足的群体；(3)通过两个研讨会进行国际合作和培训；(4)通过在鲍登学院的佩里-麦克米伦北极博物馆举办的北极气候变化和土壤碳动态研讨会以及长期展览的发展，进行公众宣传。

Collaborative Research: RUI: Sensitivity of Circum-Arctic Peatland Carbon to Holocene Warm Climates and Climate Seasonality (PIs: Zicheng Yu, David Beilman, and Philip Camill) Recent accelerated Arctic warming has caused widespread changes in terrestrial ecosystems, including carbon dynamics. Past climate warming and documented ecosystem responses provide crucial insights from Earth?s history for understanding and projecting possible responses to future climate change. In this project, researchers from Lehigh University, University of Hawaii and Bowdoin College will evaluate the outcomes of ?natural climate-warming experiments? that have occurred across the Arctic over the Holocene (the last 12,000 years). They will focus on two warm climate intervals: (1) the Holocene Thermal Maximum ranging in timings between 10,000 and 6000 years ago, and (2) the warm Medieval Climate Anomaly around 1000 years ago. The funds were requested (1) to collect new samples from carbon-rich peatlands from several critical regions (including Alaska, Mackenzie Basin, Hudson Bay Lowlands, Labrador, and Kamchatka), (2) to carry out integration and synthesis of available data, and (3) to work on climate-carbon modeling experiments along with their collaborators. The idea that both temperature and climate seasonality are dominant controls of carbon balances in carbon-rich Arctic ecosystems has important implications for projecting the fate of Arctic carbon in the future, as future warming is expected mainly in the winter season. Other broader impacts include (1) the support of new faculty career development, (2) training of undergraduate students, graduate students, and a postdoctoral fellow, emphasizing groups traditionally underrepresented in the natural sciences, (3) international collaborations and training through two workshops, and (4) public outreach through a symposium on Arctic climate change and soil carbon dynamics and the development of long-term exhibits at the Peary-MacMillan Arctic Museum at Bowdoin College.