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- 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.
- Authors
Hou, Xiyong; Li, Mingjie; Gao, Meng; Yu, Liangju; Bi, Xiaoli
- 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.
- Subjects
CHINA; NORMALIZED difference vegetation index; CHLOROPHYLL; ECOSYSTEM management; COASTS; PHYTOPLANKTON
- Publication
Environmental Monitoring & Assessment, 2013, Vol 185, Issue 1, p267
- ISSN
0167-6369
- Publication type
Article
- DOI
10.1007/s10661-012-2551-y