Collaborative Research: Connecting Spring Phenology with Lower Atmosphere Energy-Mass Exchange, Phase Two

这项合作研究将研究大气-生物圈的相互作用，这是地球物理系统的一个关键组成部分。了解这种相互作用对于改进大气环流模型以及监测碳收支的变化至关重要。PIS将把以前资助的项目中产生的模型和技术与地表植被数据集、地表能量平衡和碳通量数据以及新的遥感产品结合起来。他们将进一步发展对第一次出现在中纬度地区的春季树叶的物理解释，通常被称为“绿色浪潮”。这一结果将使我们能够制定一条时间线，将与绿波现象有关的各种大气和生物圈变化联系起来。对中纬度地区入春时间的30年常态和20世纪变化的基线评估将作为未来研究的参考。这项工作很重要，因为它将表明地表物候和气象数据在大气-生物圈模拟和全球变化监测中发挥的关键作用，当它们与卫星生物气候学数据结合使用时。

This collaborative research will examine atmosphere-biosphere interactions, a key component of the Earth's physical system. Understanding this interaction is crucial to improve general circulation models, as well as to monitor variations in the carbon budget. The PIs will combine models and techniques produced in previously funded projects, with surface vegetation data sets, surface energy balance and carbon flux data, and new remote sensing products. They will further develop the physical interpretation of the first appearance of spring foliage commonly called the 'green wave' in the mid-latitudes. The results will allow the development of a time line that interconnects various atmospheric and biospheric changes associated with the green wave phenomena. Baseline 30-year normals and 20th century change assessments of the timing of the onset of spring across mid-latitude locations will serve as references for future research. The work is important because it will demonstrate the critical roles that surface phenological and meteorological data play in atmosphere-biosphere simulations and for global change monitoring, when used in concert with satellite-derived bioclimatological data.