Estuarine and coastal primary production estimation using remote sensing data and radiative transfer modelling

利用遥感数据和辐射传输模型估算河口和沿海初级生产

• 批准号: NE/D007232/1
• 负责人: Peter Land
• 金额: $ 3.66万
• 依托单位: Plymouth Marine Laboratory
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FD007232%2F1
• 关键词: Estuarine; coastal; primary; production; estimation

Primary production is a key indicator of ecosystem health and carbon cycling and this can have a strong influence on the economic, social and physical health of the human population living in the estuarine and coastal zone. Making sufficient primary production measurements to understand aquatic ecosystems has always been difficult and expensive, but advances in airborne remote sensing technology allow us to use airborne images to produce maps of primary production in estuaries and coastal waters. Through this research we propose to develop and implement a data processing technique which will use images collected by the NERC Airborne Remote Sensing Facility to produce and disseminate primary production maps, improving our understanding of these ecosystems and allowing us to monitor them over time. We will produce lookup tables of spectra that would be seen by the aircraft under a variety of conditions, and these spectra will be compared with what the aircraft actually sees at each pixel of the image. This allows us to find the chlorophyll concentration (a measure of phytoplankton amount) and the photic depth (a measure of light availability) even in highly turbid waters such as are found in estuaries and coastal waters. Knowledge of these allows us to estimate primary production at each pixel and hence generate maps of primary production. Doing this for a succession of images allows us to build up a picture of how primary production changes over time.

初级生产是生态系统健康和碳循环的关键指标，对生活在河口和沿海地区的人口的经济、社会和身体健康产生重大影响。进行足够的初级生产测量以了解水生生态系统一直是困难且昂贵的，但机载遥感技术的进步使我们能够使用机载图像来绘制河口和沿海水域的初级生产地图。通过这项研究，我们建议开发和实施一种数据处理技术，该技术将使用 NERC 机载遥感设施收集的图像来制作和传播初级生产地图，提高我们对这些生态系统的了解，并使我们能够长期监测它们。我们将生成飞机在各种条件下看到的光谱查找表，并将这些光谱与飞机在图像的每个像素处实际看到的光谱进行比较。这使得我们即使在河口和沿海水域等高度浑浊的水域中也能找到叶绿素浓度（浮游植物数量的衡量标准）和光深度（光可用性的衡量标准）。了解这些知识使我们能够估计每个像素的初级生产，从而生成初级生产地图。对一系列图像执行此操作使我们能够了解初级生产如何随时间变化。