CAREER: Using an Urban-to-Rural Gradient as a Proxy for Global Change Effects on Selected Biosphere-Atmosphere Trace Gas Exchanges

职业：使用城乡梯度作为全球变化对选定生物圈-大气痕量气体交换影响的代理

• 批准号: 0955438
• 负责人: Gunnar Schade
• 金额: $ 60.32万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-03-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0955438&HistoricalAwards=false
• 关键词: CAREER; Using; Urban; Rural; Gradient

The overarching objective is to investigate responses of biogenic volatile organic compound (BVOC) emissions to variations in climate parameters, such as temperature and humidity. BVOC emissions, particularly isoprene, exert an important direct influence on atmospheric chemistry and an indirect one on climate. Increased BVOC emissions in a warmer climate can exacerbate regional ozone pollution and reinforce global warming. However, future BVOC emissions are uncertain due to a lack of understanding of plant BVOC production and emissions' acclimatization to climate change. The specific objectives are to: determine urban-rural response gradients due to growth environment, such as T, [CO2], and [O3]; relate trace gas exchange to physical and biophysical drivers, including seasonality; and provide adequate flux data to improve isoprene response and feedback modeling on larger scales.Along four sites from central Houston to Sam Houston National Forest, biometeorological data, and [CO2] and [O3] will be recorded year-round. In addition, auxiliary data on microclimates and soil parameters will be collected. Local trees to be studied include five oak species, sweetgum, and loblolly pine. Expected temperature and CO2 gradients along the study sites are of order 1 K and 20 ppm, respectively. Controlled laboratory, branch-level experiments performed by undergraduate students will complement the field data. Research will be conducted by undergraduate and graduate students. Undergraduate students will assist with field, and perform their own laboratory measurements and analyses. The high school program will involve teachers and students in research through jump starting related GLOBE program activities at the same schools we deploy the expanded weather stations measuring the climate and air quality gradient. Teachers and students can work with these data directly, generate their own earth science data, and interact with researchers during field measurements and workshops.

其总体目标是调查生物挥发性有机化合物（BVOC）排放对温度和湿度等气候参数变化的响应。 BVOC排放，特别是异戊二烯，对大气化学产生重要的直接影响，并对气候产生间接影响。 在气候变暖的情况下，BVOC排放量的增加会加剧区域臭氧污染，并加剧全球变暖。 然而，未来的BVOC排放量是不确定的，因为缺乏了解植物BVOC的生产和排放的气候变化的适应。 具体目标是：确定由于生长环境，如T，[CO2]和[O3]的城乡响应梯度;将痕量气体交换与物理和生物物理驱动因素，包括季节性联系起来;并提供足够的通量数据，以改善异戊二烯响应和更大尺度上的反馈建模。沿着从休斯顿中心到萨姆休斯顿国家森林的四个地点，生物计量学数据，而[CO2]和[O3]将被记录全年。 此外，还将收集关于小气候和土壤参数的辅助数据。 待研究的当地树木包括五种橡树、枫香树和火炬松。 沿研究地点的预期温度和CO2梯度沿着分别为1 K和20 ppm。 由本科生进行的受控实验室、分支级实验将补充现场数据。研究将由本科生和研究生进行。 本科生将协助现场，并进行自己的实验室测量和分析。 高中计划将通过在我们部署测量气候和空气质量梯度的扩大气象站的同一所学校启动相关的地球仪计划活动，让教师和学生参与研究。 教师和学生可以直接使用这些数据，生成自己的地球科学数据，并在现场测量和研讨会期间与研究人员互动。