Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology

Accurate and timely land surface phenology (LSP) provides essential information for investigating the responses of terrestrial ecosystems to climate changes and quantifying carbon and surface energy cycles on the Earth. LSP has been widely investigated using daily Visible Infrared Imaging Radiometer...

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Autores principales:	Yu Shen, Xiaoyang Zhang, Weile Wang, Ramakrishna Nemani, Yongchang Ye, Jianmin Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	geostationary satellite ABI HLS field-scale land surface phenology PhenoCam Science Q
Acceso en línea:	https://doaj.org/article/16c2ee24d036463d9568f1636ca37591
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spelling	oai:doaj.org-article:16c2ee24d036463d9568f1636ca375912021-11-11T18:57:57ZFusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology10.3390/rs132144652072-4292https://doaj.org/article/16c2ee24d036463d9568f1636ca375912021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4465https://doaj.org/toc/2072-4292Accurate and timely land surface phenology (LSP) provides essential information for investigating the responses of terrestrial ecosystems to climate changes and quantifying carbon and surface energy cycles on the Earth. LSP has been widely investigated using daily Visible Infrared Imaging Radiometer Suite (VIIRS) or Moderate Resolution Imaging Spectroradiometer (MODIS) observations, but the resultant phenometrics are frequently influenced by surface heterogeneity and persistent cloud contamination in the time series observations. Recently, LSP has been derived from Landsat-8 and Sentinel-2 time series providing detailed spatial pattern, but the results are of high uncertainties because of poor temporal resolution. With the availability of data from Advanced Baseline Imager (ABI) onboard a new generation of geostationary satellites that observe the earth every 10–15 min, daily cloud-free time series could be obtained with high opportunities. Therefore, this study investigates the generation of synthetic high spatiotemporal resolution time series by fusing the harmonized Landsat-8 and Sentinel-2 (HLS) time series with the temporal shape of ABI data for monitoring field-scale (30 m) LSP. The algorithm is verified by detecting the timings of greenup and senescence onsets around north Wisconsin/Michigan states, United States, where cloud cover is frequent during spring rainy season. The LSP detections from HLS-ABI are compared with those from HLS or ABI alone and are further evaluated using PhenoCam observations. The result indicates that (1) ABI could provide ~3 times more high-quality observations than HLS around spring greenup onset; (2) the greenup and senescence onsets derived from ABI and HLS-ABI are spatially consistent and statistically comparable with a median difference less than 1 and 10-days, respectively; (3) greenup and senescence onsets derived from HLS data show sharp boundaries around the orbit-overlapped areas and shifts of ~13 days delay and ~15 days ahead, respectively, relative to HLS-ABI detections; and (4) HLS-ABI greenup and senescence onsets align closely to PhenoCam observations with an absolute average difference of less than 2 days and 5 days, respectively, which are much better than phenology detections from ABI or HLS alone. The result suggests that the proposed approach could be implemented the monitor of 30 m LSP over regions with persistent cloud cover.Yu ShenXiaoyang ZhangWeile WangRamakrishna NemaniYongchang YeJianmin WangMDPI AGarticlegeostationary satelliteABIHLSfield-scale land surface phenologyPhenoCamScienceQENRemote Sensing, Vol 13, Iss 4465, p 4465 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	geostationary satellite ABI HLS field-scale land surface phenology PhenoCam Science Q
spellingShingle	geostationary satellite ABI HLS field-scale land surface phenology PhenoCam Science Q Yu Shen Xiaoyang Zhang Weile Wang Ramakrishna Nemani Yongchang Ye Jianmin Wang Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology
description	Accurate and timely land surface phenology (LSP) provides essential information for investigating the responses of terrestrial ecosystems to climate changes and quantifying carbon and surface energy cycles on the Earth. LSP has been widely investigated using daily Visible Infrared Imaging Radiometer Suite (VIIRS) or Moderate Resolution Imaging Spectroradiometer (MODIS) observations, but the resultant phenometrics are frequently influenced by surface heterogeneity and persistent cloud contamination in the time series observations. Recently, LSP has been derived from Landsat-8 and Sentinel-2 time series providing detailed spatial pattern, but the results are of high uncertainties because of poor temporal resolution. With the availability of data from Advanced Baseline Imager (ABI) onboard a new generation of geostationary satellites that observe the earth every 10–15 min, daily cloud-free time series could be obtained with high opportunities. Therefore, this study investigates the generation of synthetic high spatiotemporal resolution time series by fusing the harmonized Landsat-8 and Sentinel-2 (HLS) time series with the temporal shape of ABI data for monitoring field-scale (30 m) LSP. The algorithm is verified by detecting the timings of greenup and senescence onsets around north Wisconsin/Michigan states, United States, where cloud cover is frequent during spring rainy season. The LSP detections from HLS-ABI are compared with those from HLS or ABI alone and are further evaluated using PhenoCam observations. The result indicates that (1) ABI could provide ~3 times more high-quality observations than HLS around spring greenup onset; (2) the greenup and senescence onsets derived from ABI and HLS-ABI are spatially consistent and statistically comparable with a median difference less than 1 and 10-days, respectively; (3) greenup and senescence onsets derived from HLS data show sharp boundaries around the orbit-overlapped areas and shifts of ~13 days delay and ~15 days ahead, respectively, relative to HLS-ABI detections; and (4) HLS-ABI greenup and senescence onsets align closely to PhenoCam observations with an absolute average difference of less than 2 days and 5 days, respectively, which are much better than phenology detections from ABI or HLS alone. The result suggests that the proposed approach could be implemented the monitor of 30 m LSP over regions with persistent cloud cover.
format	article
author	Yu Shen Xiaoyang Zhang Weile Wang Ramakrishna Nemani Yongchang Ye Jianmin Wang
author_facet	Yu Shen Xiaoyang Zhang Weile Wang Ramakrishna Nemani Yongchang Ye Jianmin Wang
author_sort	Yu Shen
title	Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology
title_short	Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology
title_full	Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology
title_fullStr	Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology
title_full_unstemmed	Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology
title_sort	fusing geostationary satellite observations with harmonized landsat-8 and sentinel-2 time series for monitoring field-scale land surface phenology
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/16c2ee24d036463d9568f1636ca37591
work_keys_str_mv	AT yushen fusinggeostationarysatelliteobservationswithharmonizedlandsat8andsentinel2timeseriesformonitoringfieldscalelandsurfacephenology AT xiaoyangzhang fusinggeostationarysatelliteobservationswithharmonizedlandsat8andsentinel2timeseriesformonitoringfieldscalelandsurfacephenology AT weilewang fusinggeostationarysatelliteobservationswithharmonizedlandsat8andsentinel2timeseriesformonitoringfieldscalelandsurfacephenology AT ramakrishnanemani fusinggeostationarysatelliteobservationswithharmonizedlandsat8andsentinel2timeseriesformonitoringfieldscalelandsurfacephenology AT yongchangye fusinggeostationarysatelliteobservationswithharmonizedlandsat8andsentinel2timeseriesformonitoringfieldscalelandsurfacephenology AT jianminwang fusinggeostationarysatelliteobservationswithharmonizedlandsat8andsentinel2timeseriesformonitoringfieldscalelandsurfacephenology
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Fusing Geostationary Satellite Observations with Harmonized Landsat-8 and Sentinel-2 Time Series for Monitoring Field-Scale Land Surface Phenology

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