气候变化领域集成服务门户(CCPortal): The global distribution of leaf chlorophyll content

CCPortal

DOI	10.1016/j.rse.2019.111479
	The global distribution of leaf chlorophyll content
	Croft H.; Chen J.M.; Wang R.; Mo G.; Luo S.; Luo X.; He L.; Gonsamo A.; Arabian J.; Zhang Y.; Simic-Milas A.; Noland T.L.; He Y.; Homolová L.; Malenovský Z.; Yi Q.; Beringer J.; Amiri R.; Hutley L.; Arellano P.; Stahl C.; Bonal D.
发表日期	2020
ISSN	00344257
卷号	236
英文摘要	Leaf chlorophyll is central to the exchange of carbon, water and energy between the biosphere and the atmosphere, and to the functioning of terrestrial ecosystems. This paper presents the first spatially-continuous view of terrestrial leaf chlorophyll content (ChlLeaf) at the global scale. Weekly maps of ChlLeaf were produced from ENVISAT MERIS full resolution (300 m) satellite data using a two-stage physically-based radiative transfer modelling approach. Firstly, leaf-level reflectance was derived from top-of-canopy satellite reflectance observations using 4-Scale and SAIL canopy radiative transfer models for woody and non-woody vegetation, respectively. Secondly, the modelled leaf-level reflectance was input into the PROSPECT leaf-level radiative transfer model to derive ChlLeaf. The ChlLeaf retrieval algorithm was validated using measured ChlLeaf data from 248 sample measurements at 28 field locations, and covering six plant functional types (PFTs). Modelled results show strong relationships with field measurements, particularly for deciduous broadleaf forests (R2 = 0.67; RMSE = 9.25 μg cm-2; p < 0.001), croplands (R2 = 0.41; RMSE = 13.18 μg cm-2; p < 0.001) and evergreen needleleaf forests (R2 = 0.47; RMSE = 10.63 μg cm-2; p < 0.001). When the modelled results from all PFTs were considered together, the overall relationship with measured ChlLeaf remained good (R2 = 0.47, RMSE = 10.79 μg cm-2; p < 0.001). This result is an improvement on the relationship between measured ChlLeaf and a commonly used chlorophyll-sensitive spectral vegetation index; the MERIS Terrestrial Chlorophyll Index (MTCI; R2 = 0.27, p < 0.001). The global maps show large temporal and spatial variability in ChlLeaf, with evergreen broadleaf forests presenting the highest leaf chlorophyll values, with global annual median values of 54.4 μg cm-2. Distinct seasonal ChlLeaf phenologies are also visible, particularly in deciduous plant forms, associated with budburst and crop growth, and leaf senescence. It is anticipated that this global ChlLeaf product will make an important step towards the explicit consideration of leaf-level biochemistry in terrestrial water, energy and carbon cycle modelling. © 2019 Elsevier Inc.
英文关键词	4-Scale; Carbon cycle; Ecosystem modelling; Leaf biochemistry; Leaf physiology; MERIS; Phenology; PROSPECT; Radiative transfer; Remote sensing; SAIL; Satellite
语种	英语
scopus关键词	Biochemistry; Carbon; Chlorophyll; Ecosystems; Geodetic satellites; Radiative transfer; Reflection; Remote sensing; Satellites; Vegetation; 4-Scale; Carbon cycles; Ecosystem modelling; Leaf physiologies; MERIS; Phenology; PROSPECT; SAIL; Forestry; algorithm; atmosphere-biosphere interaction; biochemistry; carbon cycle; chlorophyll; ecosystem modeling; Envisat; global perspective; leaf; MERIS; phenology; radiative transfer; remote sensing; satellite data; scale effect; spectral reflectance; terrestrial ecosystem
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179565
作者单位	University of Toronto, Department of Geography, Toronto, ON M5S 3G3, Canada; University of Sheffield, Department of Animal and Plant Sciences, Sheffield, S10 2TN, United Kingdom; Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China; Lawrence Berkeley National Laboratory, Climate and Ecosystem Sciences Division, Berkeley, CA 94720, United States; School of Geography and Earth Sciences, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, United States; WWF-Canada, 410 Adelaide Street W, Toronto, ON M5V 1S8, Canada; Delta State University, Division of Biological and Physical Sciences, Cleveland, MS 38733, United States; Bowling Green State University, Department of Geology, Bowling Green, OH 43403-0211, United States; Ontario Ministry of Natural Resources, Ontario Forest Research Institute, 1235, Queen St. E., Sault Ste. Marie, ON P6A 2E5, Canada; University of Toronto Mississauga, Department of Geograp...
推荐引用方式 GB/T 7714	Croft H.,Chen J.M.,Wang R.,et al. The global distribution of leaf chlorophyll content[J],2020,236.
APA	Croft H..,Chen J.M..,Wang R..,Mo G..,Luo S..,...&Bonal D..(2020).The global distribution of leaf chlorophyll content.Remote Sensing of Environment,236.
MLA	Croft H.,et al."The global distribution of leaf chlorophyll content".Remote Sensing of Environment 236(2020).