Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change

The differences of three key growing season metrics, namely, the start of growing season (SOS), the end of growing season (EOS) and the length of growing season (LOS), derived from ground observations, satellite-derived normalized difference vegetation index (NDVI) data and air temperature were comp...

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Autores principales:	Linli Cui, Jun Shi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Growing season metrics Comparison ANOVA Temperature Trend Northern China Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/fc7d257d945d46d3a4d7d393dd141c01
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spelling	oai:doaj.org-article:fc7d257d945d46d3a4d7d393dd141c012021-12-01T04:33:37ZEvaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change1470-160X10.1016/j.ecolind.2020.107055https://doaj.org/article/fc7d257d945d46d3a4d7d393dd141c012021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20309948https://doaj.org/toc/1470-160XThe differences of three key growing season metrics, namely, the start of growing season (SOS), the end of growing season (EOS) and the length of growing season (LOS), derived from ground observations, satellite-derived normalized difference vegetation index (NDVI) data and air temperature were compared, and the spatial distribution and temporal trend of NDVI-based growing season metrics were analyzed in the arid and semi-arid areas of northern China. The results show that the growing season metrics obtained by three methods were quite different. The temperature-based SOS dates were earlier than those observed at the four phenological sites, while the NDVI-based SOS dates were the latest. The EOS (LOS) derived from NDVI and temperature were later (longer) than the observed values. At 240 meteorological stations, temperature-based SOS and EOS dates were generally earlier than the NDVI-based results, leading to longer temperature-based LOS than that derived from NDVI. From 1982 to 2015, the NDVI-based SOS was advanced by 2.3 days per decade, and the NDVI-based EOS was delayed by 9.5 days per decade, causing a prolonged LOS of 11.8 days per decade. Earlier SOS, later EOS and prolonged LOS were significantly appeared at 44.3%, 40.6% and 52.6% of the vegetated area respectively. The significant advanced SOS was concentrated in the central Inner Mongolia, northern Hebei, northern Shanxi and northwestern Xinjiang, while the significant delayed EOS was mainly distributed in the majority of western and northern Xinjiang and northern Inner Mongolia, resulting in the significant prolonged LOS in most of the study area. Each method has its distinct advantages and disadvantages. It is suggested to use high spatial and temporal resolution satellite images and appropriate methods to establish phenological models for different land cover types and to take into account the powerful vegetation indices and key climatic factors such as daytime temperature and precipitation and their interactions, which are of great significance for large-scale and accurate phenological monitoring and assessment.Linli CuiJun ShiElsevierarticleGrowing season metricsComparisonANOVATemperatureTrendNorthern ChinaEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107055- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Growing season metrics Comparison ANOVA Temperature Trend Northern China Ecology QH540-549.5
spellingShingle	Growing season metrics Comparison ANOVA Temperature Trend Northern China Ecology QH540-549.5 Linli Cui Jun Shi Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change
description	The differences of three key growing season metrics, namely, the start of growing season (SOS), the end of growing season (EOS) and the length of growing season (LOS), derived from ground observations, satellite-derived normalized difference vegetation index (NDVI) data and air temperature were compared, and the spatial distribution and temporal trend of NDVI-based growing season metrics were analyzed in the arid and semi-arid areas of northern China. The results show that the growing season metrics obtained by three methods were quite different. The temperature-based SOS dates were earlier than those observed at the four phenological sites, while the NDVI-based SOS dates were the latest. The EOS (LOS) derived from NDVI and temperature were later (longer) than the observed values. At 240 meteorological stations, temperature-based SOS and EOS dates were generally earlier than the NDVI-based results, leading to longer temperature-based LOS than that derived from NDVI. From 1982 to 2015, the NDVI-based SOS was advanced by 2.3 days per decade, and the NDVI-based EOS was delayed by 9.5 days per decade, causing a prolonged LOS of 11.8 days per decade. Earlier SOS, later EOS and prolonged LOS were significantly appeared at 44.3%, 40.6% and 52.6% of the vegetated area respectively. The significant advanced SOS was concentrated in the central Inner Mongolia, northern Hebei, northern Shanxi and northwestern Xinjiang, while the significant delayed EOS was mainly distributed in the majority of western and northern Xinjiang and northern Inner Mongolia, resulting in the significant prolonged LOS in most of the study area. Each method has its distinct advantages and disadvantages. It is suggested to use high spatial and temporal resolution satellite images and appropriate methods to establish phenological models for different land cover types and to take into account the powerful vegetation indices and key climatic factors such as daytime temperature and precipitation and their interactions, which are of great significance for large-scale and accurate phenological monitoring and assessment.
format	article
author	Linli Cui Jun Shi
author_facet	Linli Cui Jun Shi
author_sort	Linli Cui
title	Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change
title_short	Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change
title_full	Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change
title_fullStr	Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change
title_full_unstemmed	Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change
title_sort	evaluation and comparison of growing season metrics in arid and semi-arid areas of northern china under climate change
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/fc7d257d945d46d3a4d7d393dd141c01
work_keys_str_mv	AT linlicui evaluationandcomparisonofgrowingseasonmetricsinaridandsemiaridareasofnorthernchinaunderclimatechange AT junshi evaluationandcomparisonofgrowingseasonmetricsinaridandsemiaridareasofnorthernchinaunderclimatechange
_version_	1718405880828919808

Evaluation and comparison of growing season metrics in arid and semi-arid areas of northern China under climate change

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