Ground Data are Essential for Biomass Remote Sensing Missions
Ground Data are Essential for Biomass Remote Sensing Missions
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DOI：
10.1007/s10712-019-09528-w
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发表时间：
2019-07-01
影响因子：
4.6
通讯作者：
Saatchi, Sassan
中科院分区：
文献类型：
--
作者：
Chave, Jerome;Davies, Stuart J.;Saatchi, Sassan
几个遥感任务很快将绘制所有陆地生态系统的详细碳地图。这些任务依赖于准确且具有代表性的现场数据集来训练算法和产品验证。然而，长期的地面森林监测系统是有限的，特别是在热带地区，为了有助于验证，这种地面观测系统需要至少在计划任务的整个生命周期内定期重新访问和维护。在这里，我们提出了一项协调的全球现场数据网络战略，这将有利于生物质遥感任务。我们建议以现有的长期热带森林监测网络为基础。为了产生准确的地面生物量估算，必须向用户保证严格的数据质量。在目前可以保证当地长期承诺并且已经拥有一组核心数据的地点投资地面资源会更有价值。我们称这些为“超级网站”。这种机构间努力的长期资助仍然是一个重要的挑战，我们在此提供成本估算，以促进利益相关者之间的对话。一项关键要求是确保遥感任务整个生命周期内现场数据的可用性。为此，在森林观测系统内提出了一致的超级站点选择和管理指南，应保证长期资金，并应积极参与站点的主要研究人员。
Several remote sensing missions will soon produce detailedcarbon maps over all terrestrial ecosystems. These missions are dependent on accurate and representative in situ datasets for the training of their algorithms and product validation. However, long-term ground-based forest-monitoring systems are limited, especially in the tropics, and to be useful for validation, such ground-based observation systems need to be regularly revisited andmaintained at least over the lifetime of the planned missions. Here we propose a strategy for a coordinated and global network of in situ data that would benefit biomass remote sensing missions. We propose to build upon existing networks of long-term tropical forest monitoring.To produce accurate ground-based biomass estimates, strict data quality must be guaranteed to users. It is more rewarding to invest ground resources at sites where there currently isassurance of a long-term commitment locally and where a core set of data is already available. We call these supersites'. Long-term funding for such an inter-agency endeavour remains an important challenge, and we here provide costing estimates to facilitate dialogue among stakeholders. One critical requirement is to ensure in situ data availability over the lifetime of remote sensing missions. To this end, consistent guidelines for supersite selection and management are proposed within the Forest Observation System, long-term funding should be assured, andprincipal investigators of the sites should be activelyinvolved.