SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA
Spatial distribution of chlorophyll-a (chla) concentration in Lake Taihu is non-uniform and seasonal variability. Chla concentration retrieval algorithms were separately established using measured data and remote sensing images (HJ-1 CCD and MODIS data) in October 2010, March 2011, and September 2...
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doaj-23a69f7669764d6d89941c98373565a52020-11-25T01:00:41ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342012-08-01XXXIX-B726927410.5194/isprsarchives-XXXIX-B7-269-2012SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINAY. Bao0Q. Tian1S. Sun2H. Wei3J. Tian4International Institute for Earth System Science, Nanjing University, Nanjing 210093, ChinaInternational Institute for Earth System Science, Nanjing University, Nanjing 210093, ChinaInternational Institute for Earth System Science, Nanjing University, Nanjing 210093, ChinaInternational Institute for Earth System Science, Nanjing University, Nanjing 210093, ChinaSchool of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaSpatial distribution of chlorophyll-a (chla) concentration in Lake Taihu is non-uniform and seasonal variability. Chla concentration retrieval algorithms were separately established using measured data and remote sensing images (HJ-1 CCD and MODIS data) in October 2010, March 2011, and September 2011. Then parameters of semi- variance were calculated on the scale of 30m, 250m and 500m for analyzing spatial heterogeneity in different seasons. Finally, based on the definitions of Lumped chla (chlaL) and Distributed chla (chlaD), seasonal model of chla concentration scale error was built. The results indicated that: spatial distribution of chla concentration in spring was more uniform. In summer and autumn, chla concentration in the north of the lake such as Meiliang Bay and Zhushan Bay was higher than that in the south of Lake Taihu. Chla concentration on different scales showed the similar structure in the same season, while it had different structure in different seasons. And inversion chla concentration from MODIS 500m had a greater scale error. The spatial scale error changed with seasons. It was higher in summer and autumn than that in spring. The maximum relative error can achieve 23%.https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B7/269/2012/isprsarchives-XXXIX-B7-269-2012.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Y. Bao Q. Tian S. Sun H. Wei J. Tian |
spellingShingle |
Y. Bao Q. Tian S. Sun H. Wei J. Tian SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
author_facet |
Y. Bao Q. Tian S. Sun H. Wei J. Tian |
author_sort |
Y. Bao |
title |
SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA |
title_short |
SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA |
title_full |
SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA |
title_fullStr |
SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA |
title_full_unstemmed |
SEASONAL DIFFERENCES IN SPATIAL SCALES OF CHLOROPHYLL-A CONCENTRATION IN LAKE TAIHU,CHINA |
title_sort |
seasonal differences in spatial scales of chlorophyll-a concentration in lake taihu,china |
publisher |
Copernicus Publications |
series |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
issn |
1682-1750 2194-9034 |
publishDate |
2012-08-01 |
description |
Spatial distribution of chlorophyll-a (chla) concentration in Lake Taihu is non-uniform and seasonal variability. Chla concentration
retrieval algorithms were separately established using measured data and remote sensing images (HJ-1 CCD and MODIS data) in
October 2010, March 2011, and September 2011. Then parameters of semi- variance were calculated on the scale of 30m, 250m and
500m for analyzing spatial heterogeneity in different seasons. Finally, based on the definitions of Lumped chla (chlaL) and
Distributed chla (chlaD), seasonal model of chla concentration scale error was built. The results indicated that: spatial distribution of
chla concentration in spring was more uniform. In summer and autumn, chla concentration in the north of the lake such as Meiliang
Bay and Zhushan Bay was higher than that in the south of Lake Taihu. Chla concentration on different scales showed the similar
structure in the same season, while it had different structure in different seasons. And inversion chla concentration from MODIS
500m had a greater scale error. The spatial scale error changed with seasons. It was higher in summer and autumn than that in spring.
The maximum relative error can achieve 23%. |
url |
https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B7/269/2012/isprsarchives-XXXIX-B7-269-2012.pdf |
work_keys_str_mv |
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