CAREER: Disentangling CO2 Fluxes in a Tropical Rainforest Using Carbonyl Sulfide

GSTDTAP

项目编号	1455381
	CAREER: Disentangling CO2 Fluxes in a Tropical Rainforest Using Carbonyl Sulfide
	Ulrike Seibt
主持机构	University of California-Los Angeles
项目开始年	2015
	2015-05-01
项目结束日期	2020-04-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	173693(USD)
国家	美国
语种	英语
英文摘要	The primary objective of this CAREER project is to quantify gross carbon dioxide (CO2) fluxes in a tropical forest and obtain new understanding of processes linking these fluxes to environmental conditions. This project uses carbonyl sulfide (COS), an atmospheric trace gas, as a proxy for carbon dioxide uptake by plants, since both gases are consumed inside leaf cells by the same enzyme. This method will be used to estimate Gross Primary Production (GPP) through photosynthesis in a tropical rain forest. The results will provide a better understanding of the carbon cycle and its role in the Earth system science. Both the Atmospheric Chemistry Program and the Ecosystem Science Program at NSF are supporting this interdisciplinary project. The Faculty Early Career Development (CAREER) Program is a Foundation-wide activity that offers the National Science Foundation's most prestigious awards in support of junior faculty who exemplify the role of teacher-scholars through outstanding research, excellent education and the integration of education and research within the context of the mission of their organizations. Three methods being employed for estimating ecosystem GPP in the rainforest are: (1) a field campaign to measure ecosystem fluxes of COS as novel tracer of GPP, (2) a network of distributed flux chambers to obtain new information on spatial and temporal patterns of plant and soil CO2 fluxes, and (3) an education-outreach program that will collect long-term data on CO2 fluxes across the forest canopy. The field study will take place at La Selva Biological Station in Costa Rica, a site that has hosted over 12 years of ongoing rainforest research. The results of this research will help to answer questions such as how CO2 uptake responds to variations in soil moisture, light and temperature. The study will provide new information on the relationship of ecosystem respiration to changes in temperature during the day and night and help to explain how changes in GPP and ecosystem respiration contribute to large interannual fluctuations in both net ecosystem exchange and forest growth. This research is well integrated with several educational activities, such as the development of a sensor lab course to provide advanced undergraduate students with hands-on field experiences. There are also plans for an outreach program for K-12 students at the Stunt Ranch Reserve (a biological field station) in the Santa Monica Mountains and the creation of a Legacy dataset at the field site involving high school students and college level students from both the U.S. and Costa Rica.
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/67906
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Ulrike Seibt.CAREER: Disentangling CO2 Fluxes in a Tropical Rainforest Using Carbonyl Sulfide.2015.