Patterns and processes of carbon, water and energy cycles across northern Australian landscapes: From point to region
Patterns and processes of carbon, water and energy cycles across northern Australian landscapes: From point to region
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DOI：
10.1016/j.agrformet.2011.05.003
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发表时间：
2011-11-15
影响因子：
6.2
通讯作者：
Kyaw Tha Paw U
中科院分区：
文献类型：
--
作者：
Beringer, Jason;Hutley, Lindsay B.;Kyaw Tha Paw U
热带稀树草原占陆地面积的很大一部分，其组成、结构和功能各不相同。这些特征改变了陆地与大气之间热、水、二氧化碳和其他微量气体的交换，这些交换在多个尺度上反馈给气候。澳大利亚稀树草原提供了重要的生态系统服务，需要进一步系统的科学研究来可持续地管理这些生态系统。我们进行了一项跨学科的研究，以了解澳大利亚北部景观的碳、水和能源循环的模式和过程，从点到区域。我们量化了澳大利亚热带稀树草原广大地区的地表-大气交换，使用分层、综合测量和建模方法来确定区域温室气体和水预算。该研究小组由来自7个机构和4个国家的小组组成。研究工作包括多年的测量和建模工作，并在2008年9月（旱季后期）举行的密集实地项目中达到高潮。该项目旨在提高我们对陆地-大气交换的时空变化及其驱动过程的认识，以及我们利用陆地表面模型（全球气候模型的关键组成部分）遥感和模拟它们的能力。我们试图将小尺度过程（如叶片光合作用）整合到适用于热带草原地区建模和遥感的大尺度过程中。在这篇论文中，我们提供了科学背景和我们的总体方法，并参考了这篇“横跨景观的能量和碳整合的热带稀树草原模式”（特刊）中的论文。(C) 2011 Elsevier B.V.版权所有
Savannas comprise a large proportion of the terrestrial land surface and are highly varied in their composition, structure and function. These characteristics alter land-atmosphere exchanges of heat, water, carbon dioxide and other trace gases, which feed back to the climate at multiple scales. Australian savannas provide significant ecosystem services and further systematic scientific study is needed to sustainably manage these ecosystems. We undertook an interdisciplinary research effort to understand the patterns and processes of carbon, water and energy cycles across northern Australian landscapes across scales from point to region. We quantified the land surface-atmosphere exchanges across the vast region of Australian savannas using a hierarchical, integrated measurement and modelling approach to determine regional greenhouse gas and water budgets. The research team comprised groups from seven institutions and four countries. The research effort comprised of a multi- year measurement and modelling endeavour and culminated in an intensive field program held in September 2008 (late dry season). The program aimed to improve our knowledge of the spatial and temporal variability of land-atmosphere exchanges and the processes driving them as well as our ability to remotely sense them and simulate them using land surface models, which are crucial components of Global Climate Models. We attempted to robustly integrate small scale processes, such as leaf photosynthesis to larger scales applicable to modelling and remote sensing for the savanna region. In this paper we provide the scientific background and our overall approach to the program with reference to the papers in this "Savanna Patterns of Energy and Carbon Integrated Across the Landscape" (SPECIAL) issue. (C) 2011 Elsevier B.V. All rights reserved.