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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Main Authors: Y. Bao, Q. Tian, S. Sun, H. Wei, J. Tian
Format: Article
Language:English
Published: Copernicus Publications 2012-08-01
Series:The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Online Access:https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B7/269/2012/isprsarchives-XXXIX-B7-269-2012.pdf
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spelling 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
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AT qtian seasonaldifferencesinspatialscalesofchlorophyllaconcentrationinlaketaihuchina
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