EAR-PF: Climate sensitivity in mountain lakes of the Sierra Nevada, CA: controls on thermal regimes and carbon cycling

EAR-PF：加利福尼亚州内华达山脉高山湖泊的气候敏感性：对热状况和碳循环的控制

• 批准号: 1725266
• 负责人: Adrianne Smits
• 金额: $ 8.7万
• 依托单位: Smits Adrianne P
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-05-01 至 2020-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1725266&HistoricalAwards=false
• 关键词: EAR; PF; Climate; sensitivity; mountain

Dr. Adrianne Smits has been granted an NSF EAR Postdoctoral Fellowship to carry out research and educational activities at the University of California, Davis. The main research goal is to examine how physical characteristics of high elevation lakes mediate the influence of snowmelt in determining lake temperature and carbon chemistry. This study will advance understanding of interactions between climate, geomorphology, and lake temperature in high elevation watersheds, as well as landscape controls on carbon cycling in mountain lakes. This study will benefit water resource management in mountain regions by developing models that predict high elevation lake temperature and identify lake sensitivity to climate change. Dr. Smits will directly involve undergraduate students in the proposed research, training them in scientific methods and analysis. In addition, Dr. Smits will develop education and outreach materials that integrate art and science via collaboration with the Art/Science Fusion Program at UC Davis, in order to communicate the results of this research with broad audiences. The objectives of this research are (i) to develop predictive empirical models of high elevation lake temperature by investigating how local and regional drivers interact to affect lake heat budgets and warming rates and (ii) to quantify landscape patterns and controls on ecosystem metabolism and carbon emissions in mountain lakes. A combination of in-situ high frequency temperature data, remote sensing products, heat budget algorithms, and time series analyses will be used to achieve the first objective. Dr. Smits will improve existing algorithms for quantifying lake heat budgets by including the advectic role of snowmelt, therefore better reflecting the hydrology of mountain lakes. To achieve the second objective, Dr. Smits will conduct a multi-lake survey of carbon biogeochemistry across relevant environment gradients and will use an oxygen mass balance approach to quantify ecosystem metabolism.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.

Adrianne Smits博士已获得NSF博士后奖学金，在加州大学戴维斯分校开展研究和教育活动。主要研究目标是研究高海拔湖泊的物理特性如何调节融雪对确定湖泊温度和碳化学的影响。这项研究将促进高海拔流域气候，地貌和湖泊温度之间的相互作用的理解，以及景观对山地湖泊碳循环的控制。这项研究将有利于水资源管理在山区开发模型，预测高海拔湖泊温度和识别湖泊对气候变化的敏感性。Smits博士将直接让本科生参与拟议的研究，对他们进行科学方法和分析方面的培训。此外，Smits博士还将通过与加州大学戴维斯分校的艺术/科学融合项目合作，开发整合艺术和科学的教育和宣传材料，以便与广大受众交流这项研究的结果。 本研究的目标是（一）开发高海拔湖泊温度的预测经验模型，通过调查当地和区域的驱动因素如何相互作用，影响湖泊热收支和变暖率和（ii）量化景观格局和控制生态系统代谢和碳排放在山区湖泊。将使用现场高频温度数据、遥感产品、热收支算法和时间序列分析相结合的方法来实现第一个目标。Smits博士将改进现有的量化湖泊热量收支的算法，包括融雪的平流作用，从而更好地反映山区湖泊的水文。为了实现第二个目标，Smits博士将在相关环境梯度上进行多湖碳地球化学调查，并将使用氧质量平衡方法来量化生态系统代谢。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。

项目成果

Detecting Signals of Large‐Scale Climate Phenomena in Discharge and Nutrient Loads in the Mississippi‐Atchafalaya River Basin

检测密西西比-阿查法拉亚河流域排放和养分负荷中大尺度气候现象的信号

• DOI: 10.1029/2018gl081166
• 发表时间: 2019
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Smits, A. P.;Ruffing, C. M.;Royer, T. V.;Appling, A. P.;Griffiths, N. A.;Bellmore, R.;Scheuerell, M. D.;Harms, T. K.;Jones, J. B.
• 通讯作者: Jones, J. B.

Snowpack determines relative importance of climate factors driving summer lake warming

积雪决定了驱动夏季湖泊变暖的气候因素的相对重要性

• DOI: 10.1002/lol2.10147
• 发表时间: 2020
• 期刊: Limnology and Oceanography Letters
• 影响因子: 7.8
• 作者: Smits, Adrianne P.;MacIntyre, Sally;Sadro, Steven
• 通讯作者: Sadro, Steven