CAREER: Research on Weather and Climate Impacts of Land Use and Land Cover (LULC) Change--Supporting Technology-Driven Science Inquiry as Pedagogy

职业：土地利用和土地覆盖（LULC）变化的天气和气候影响研究——支持技术驱动的科学探究作为教学法

• 批准号: 1352046
• 负责人: Udaysankar Nair
• 金额: $ 74.83万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-05-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1352046&HistoricalAwards=false
• 关键词: CAREER; Research; Weather; Climate; Impacts

The impacts of Land Use and Land Cover (LULC) change on weather and climate are expected to vary depending upon the island geometry (size, aspect ratio and shoreline shape) and terrain. A conceptual understanding of such variations will be established though idealized numerical modeling experiments (NME). The concept developed will be used to analyze more realistic NME, investigating the weather and climate impacts of observed LULC changes (2000-2010) in the maritime continent, which exerts an important influence on tropical climate. Educational aspects of this project is the integration of Polaris, a discovery engine designed for operating on big data, with NME outputs generated from the Principal Investigator's (PI) research (past, ongoing and future) to transition from a deductive to inductive methodology for teaching of graduate level courses in Atmospheric Dynamics.Intellectual Merit :LULC change can have a substantial impact on weather and climate, but varies in complex fashion depending upon geographical setting, especially terrain and continentality. A conceptual framework for understanding the geographic variability is gradually emerging from prior studies, including those of the PI. The research activities will lead to an important addition to this framework, namely the impact LULC change in the context of island settings, and improved understanding of the effect of deforestation in the maritime continent. Note that the influence of the maritime continent on tropical climate is disproportionate to its land area, contributing to 40% of latent heating in the global tropics (~twice compared to continental convection). A large portion occurs in the vicinity of small islands as sea breeze initiated convection and is potentially impacted by LULC changes. Thus the proposed research is relevant and important, especially in the context of the IPCC determination that radiative forcing caused by land-atmosphere interactions is not well quantified, and is one of the key uncertainties. Whereas tools for big data analysis are becoming more common in field of Atmospheric Science, incorporation of this capability in classroom settings is lacking. Analysis of large datasets to establish relationship between atmospheric variables relevant to a phenomenon, and inferring the nature of theoretical framework needed to analyze it is an effective method for teaching of Atmospheric Dynamics. Learning in such an inductive setting mimics the natural development of the field. However, the pedagogy required for this purpose is also lacking. The PI addresses these critical gaps through integration of his research and educational activities.Broader Impacts :The LULC change impacts could be exacerbating or mitigating the effects large scale climate trends in the maritime continent. For some island settings, deforestation could lead to decrease in rainfall over agricultural regions and thus the concern that increase in productivity gained from expanding the crop lands may be negated by reduced rainfall caused by deforestation. Thus the results from this study have the potential to inform and lead to better policy formulation regarding climate change mitigation and sustainable environmental management. Atmospheric dynamics is often a very difficult course for students in atmospheric science. The teaching method developed via this award has the potential to transition students from mimicry to mastery, improving research creativity and retention in graduate programs. The proposed educational portal will document and share the big data supported inductive pedagogy with a wider community, allowing continued evolution from other educators and students.

土地利用和土地覆盖（LULC）的影响对天气和气候的变化预计会因岛屿几何形状（尺寸，宽高比和海岸线形状）和地形而有所不同。通过理想化的数值建模实验（NME），将建立对这种变化的概念理解。开发的概念将用于分析更现实的NME，研究海上大陆上观察到的LULC变化（2000- 2010年）的天气和气候影响，这对热带气候产生了重要影响。 Educational aspects of this project is the integration of Polaris, a discovery engine designed for operating on big data, with NME outputs generated from the Principal Investigator's (PI) research (past, ongoing and future) to transition from a deductive to inductive methodology for teaching of graduate level courses in Atmospheric Dynamics.Intellectual Merit :LULC change can have a substantial impact on weather and climate, but varies in complex fashion depending upon geographical环境，尤其是地形和大陆。理解地理变异性的概念框架逐渐从先前的研究中逐渐出现，包括PI的研究。研究活动将导致对该框架的重要补充，即Lulc在岛屿环境中的影响变化，并提高了对海事大陆森林砍伐影响的理解。请注意，海洋大陆对热带气候的影响与其土地面积不成比例，在全球热带地区造成了40％的潜在供暖（与大陆对流相比两次）。当海风引发对流时，小岛附近发生了很大一部分，并可能受到LULC变化的影响。因此，拟议的研究是相关且重要的，尤其是在IPCC确定的背景下，由土地 - 大气相互作用引起的辐射强迫尚未得到很好的量化，并且是关键的不确定性之一。尽管大气科学领域的大数据分析工具变得越来越普遍，但缺乏在课堂环境中这种能力的纳入。分析大型数据集以建立与现象相关的大气变量之间的关系，并推断出分析所需的理论框架的性质是一种有效的大气动力学教学方法。在这样的归纳环境中学习模仿了该领域的自然发展。但是，为此目的所需的教学法也缺乏。 PI通过整合他的研究和教育活动来解决这些关键差距。BROADER的影响：LULC变化的影响可能会加剧或减轻海上大陆的大规模气候趋势的影响。对于某些岛屿环境，森林砍伐可能会导致农业地区的降雨减少，因此，由于森林砍伐导致的降雨量减少，因此可能会否定农作物土地增加生产率的担忧。因此，这项研究的结果有可能告知并导致有关缓解气候变化和可持续环境管理的更好的政策制定。对于大气科学的学生来说，大气动态通常是一个非常困难的课程。通过该奖项开发的教学方法有可能从模仿到精通，改善研究生课程的研究创造力和保留率。拟议的教育门户网站将与更广泛的社区记录并分享支持的归纳教学法，从而允许其他教育者和学生的持续发展。