title: Spatial-temporal dynamics of NDVI and Chl-a concentration from 1998 to 2009 in the East coastal zone of China: integrating terrestrial and oceanic components.
abstract: Annual normalized difference vegetation index (NDVI) and chlorophyll-a (Chl-a) concentration are the most important large-scale indicators of terrestrial and oceanic ecosystem net primary productivity. In this paper, the Sea-viewing Wide Field-of-view Sensor level 3 standard mapped image annual products from 1998 to 2009 are used to study the spatial-temporal characters of terrestrial NDVI and oceanic Chl-a concentration on two sides of the coastline of China by using the methods of mean value (M), coefficient of variation (CV), the slope of unary linear regression model (Slope), and the Hurst index (H). In detail, we researched and analyzed the spatial-temporal dynamics, the longitudinal zonality and latitudinal zonality, the direction, intensity, and persistency of historical changes. The results showed that: (1) spatial patterns of M and CV between NDVI and Chl-a concentration from 1998 to 2009 were very different. The dynamic variation of terrestrial NDVI was much mild, while the variation of oceanic Chl-a concentration was relatively much larger; (2) distinct longitudinal zonality was found for Chl-a concentration and NDVI due to their hypersensitivity to the distance to shoreline, and strong latitudinal zonality existed for Chl-a concentration while terrestrial NDVI had a very weak latitudinal zonality; (3) overall, the NDVI showed a slight decreasing trend while the Chl-a concentration showed a significant increasing trend in the past 12 years, and both of them exhibit strong self-similarity and long-range dependence which indicates opposite future trends between land and ocean.
authors.affiliation: Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), YICCAS, Yantai, Shandong 264003, People's Republic of China. xyhou@yic.ac.cn
authors.forename: Xiyong
authors.initials: X
authors.lastname: Hou
authors.forename: Mingjie
authors.initials: M
authors.lastname: Li
authors.forename: Meng
authors.initials: M
authors.lastname: Gao
authors.forename: Liangju
authors.initials: L
authors.lastname: Yu
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Bi
mesh_terms: D044822:Biodiversity; D002681:China; D002734:Chlorophyll / Q000032:analysis*; D000077194:Chlorophyll A; D004784:Environmental Monitoring / Q000379:methods*; D010944:Plants; D058998:Remote Sensing Technology; D012623:Seawater / Q000737:chemistry*; D018531:Spacecraft; D062211:Spatio-Temporal Analysis; D014876:Water Pollution / Q000706:statistics & numerical data
chemical_list: D002734:Chlorophyll; D000077194:Chlorophyll A