Global clumping index map derived from modis BRDF products

Liming He; Jing M. Chen; Jan Pisek; Crystal Schaaf; Alan H. Strahler

doi:10.1109/IGARSS.2011.6049427

Global clumping index map derived from modis BRDF products

Liming He
, Jing M. Chen
, Jan Pisek
, Crystal Schaaf
, Alan H. Strahler

SFE - Dean's Office

University of Toronto
Tartu Observatory
Boston University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this study, we show for the first time a global Clumping Index (CI) map at 500 m resolution derived using the Bidirectional Reflectance Distribution Function (BRDF) product from Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the hotspot calculated from the MODIS BRDF product is underestimated in comparison with POLarization and Directionality of the Earth's Reflectances (POLDER) measurements very near the hotspot, so the MODIS-derived CI could be overestimated without correcting the bias. We developed an approach to correct the MODIS hotspot magnitude against synchronous co-registered POLDER-3 data. Field measured CIs by the Tracing Radiation and Architecture of Canopies instrument from 38 sites were used to evaluate the global CI map. Validation indicates that a strong correlation between MODIS-derived NDHD and CI indeed exists, and red band is better than near infrared band in effectively capturing the structural differences among cover types.

Original language	English
Title of host publication	2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings
Pages	1255-1258
Number of pages	4
DOIs	https://doi.org/10.1109/IGARSS.2011.6049427
State	Published - 2011
Event	2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Vancouver, BC, Canada Duration: Jul 24 2011 → Jul 29 2011

Publication series

Name	International Geoscience and Remote Sensing Symposium (IGARSS)

Conference

Conference	2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011
Country/Territory	Canada
City	Vancouver, BC
Period	7/24/11 → 7/29/11

ASJC Scopus Subject Areas

Computer Science Applications
General Earth and Planetary Sciences

Keywords

BRDF
Clumping index
hotspot
MODIS
NDHD

Access to Document

10.1109/IGARSS.2011.6049427

Cite this

Global clumping index map derived from modis BRDF products. / He, Liming; Chen, Jing M.; Pisek, Jan et al.
2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings. 2011. p. 1255-1258 6049427 (International Geoscience and Remote Sensing Symposium (IGARSS)).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

He, L, Chen, JM, Pisek, J, Schaaf, C & Strahler, AH 2011, Global clumping index map derived from modis BRDF products. in 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings., 6049427, International Geoscience and Remote Sensing Symposium (IGARSS), pp. 1255-1258, 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011, Vancouver, BC, Canada, 7/24/11. https://doi.org/10.1109/IGARSS.2011.6049427

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title = "Global clumping index map derived from modis BRDF products",

abstract = "In this study, we show for the first time a global Clumping Index (CI) map at 500 m resolution derived using the Bidirectional Reflectance Distribution Function (BRDF) product from Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the hotspot calculated from the MODIS BRDF product is underestimated in comparison with POLarization and Directionality of the Earth's Reflectances (POLDER) measurements very near the hotspot, so the MODIS-derived CI could be overestimated without correcting the bias. We developed an approach to correct the MODIS hotspot magnitude against synchronous co-registered POLDER-3 data. Field measured CIs by the Tracing Radiation and Architecture of Canopies instrument from 38 sites were used to evaluate the global CI map. Validation indicates that a strong correlation between MODIS-derived NDHD and CI indeed exists, and red band is better than near infrared band in effectively capturing the structural differences among cover types.",

keywords = "BRDF, Clumping index, hotspot, MODIS, NDHD",

author = "Liming He and Chen, \{Jing M.\} and Jan Pisek and Crystal Schaaf and Strahler, \{Alan H.\}",

year = "2011",

doi = "10.1109/IGARSS.2011.6049427",

language = "English",

isbn = "9781457710056",

series = "International Geoscience and Remote Sensing Symposium (IGARSS)",

pages = "1255--1258",

booktitle = "2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings",

note = "2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 ; Conference date: 24-07-2011 Through 29-07-2011",

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T1 - Global clumping index map derived from modis BRDF products

AU - He, Liming

AU - Chen, Jing M.

AU - Pisek, Jan

AU - Schaaf, Crystal

AU - Strahler, Alan H.

PY - 2011

Y1 - 2011

N2 - In this study, we show for the first time a global Clumping Index (CI) map at 500 m resolution derived using the Bidirectional Reflectance Distribution Function (BRDF) product from Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the hotspot calculated from the MODIS BRDF product is underestimated in comparison with POLarization and Directionality of the Earth's Reflectances (POLDER) measurements very near the hotspot, so the MODIS-derived CI could be overestimated without correcting the bias. We developed an approach to correct the MODIS hotspot magnitude against synchronous co-registered POLDER-3 data. Field measured CIs by the Tracing Radiation and Architecture of Canopies instrument from 38 sites were used to evaluate the global CI map. Validation indicates that a strong correlation between MODIS-derived NDHD and CI indeed exists, and red band is better than near infrared band in effectively capturing the structural differences among cover types.

AB - In this study, we show for the first time a global Clumping Index (CI) map at 500 m resolution derived using the Bidirectional Reflectance Distribution Function (BRDF) product from Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the hotspot calculated from the MODIS BRDF product is underestimated in comparison with POLarization and Directionality of the Earth's Reflectances (POLDER) measurements very near the hotspot, so the MODIS-derived CI could be overestimated without correcting the bias. We developed an approach to correct the MODIS hotspot magnitude against synchronous co-registered POLDER-3 data. Field measured CIs by the Tracing Radiation and Architecture of Canopies instrument from 38 sites were used to evaluate the global CI map. Validation indicates that a strong correlation between MODIS-derived NDHD and CI indeed exists, and red band is better than near infrared band in effectively capturing the structural differences among cover types.

KW - BRDF

KW - Clumping index

KW - hotspot

KW - MODIS

KW - NDHD

UR - https://www.scopus.com/pages/publications/80955131933

UR - https://www.scopus.com/pages/publications/80955131933#tab=citedBy

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DO - 10.1109/IGARSS.2011.6049427

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AN - SCOPUS:80955131933

SN - 9781457710056

T3 - International Geoscience and Remote Sensing Symposium (IGARSS)

SP - 1255

EP - 1258

BT - 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 - Proceedings

T2 - 2011 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011

Y2 - 24 July 2011 through 29 July 2011

ER -

Global clumping index map derived from modis BRDF products

Abstract

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Conference

ASJC Scopus Subject Areas

Keywords

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