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Article: Annual dynamics of global land cover and its long-term changes from 1982 to 2015

TitleAnnual dynamics of global land cover and its long-term changes from 1982 to 2015
Authors
Issue Date2020
Citation
Earth System Science Data, 2020, v. 12, n. 2, p. 1217-1243 How to Cite?
AbstractLand cover is the physical material at the surface of the Earth. As the cause and result of global environmental change, land cover change (LCC) influences the global energy balance and biogeochemical cycles. Continuous and dynamic monitoring of global LC is urgently needed. Effective monitoring and comprehensive analysis of LCC at the global scale are rare. With the latest version of GLASS (Global Land Surface Satellite) CDRs (climate data records) from 1982 to 2015, we built the first record of 34-year-long annual dynamics of global land cover (GLASS-GLC) at 5 km resolution using the Google Earth Engine (GEE) platform. Compared to earlier global land cover (LC) products, GLASS-GLC is characterized by high consistency, more detail, and longer temporal coverage. The average overall accuracy for the 34 years each with seven classes, including cropland, forest, grassland, shrubland, tundra, barren land, and snow/ice, is 82.81 % based on 2431 test sample units. We implemented a systematic uncertainty analysis and carried out a comprehensive spatiotemporal pattern analysis. Significant changes at various scales were found, including barren land loss and cropland gain in the tropics, forest gain in the Northern Hemisphere, and grassland loss in Asia. A global quantitative analysis of human factors showed that the average human impact level in areas with significant LCC was about 25.49 %. The anthropogenic influence has a strong correlation with the noticeable vegetation gain, especially for forest. Based on GLASS-GLC, we can conduct long-term LCC analysis, improve our understanding of global environmental change, and mitigate its negative impact. GLASS-GLC will be further applied in Earth system modeling to facilitate research on global carbon and water cycling, vegetation dynamics, and climate change. The GLASS-GLC data set presented in this article is available at https://doi.org/10.1594/PANGAEA.913496 (Liu et al., 2020).
Persistent Identifierhttp://hdl.handle.net/10722/296894
ISSN
2023 Impact Factor: 11.2
2023 SCImago Journal Rankings: 4.231
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, Han-
dc.contributor.authorGong, Peng-
dc.contributor.authorWang, Jie-
dc.contributor.authorClinton, Nicholas-
dc.contributor.authorBai, Yuqi-
dc.contributor.authorLiang, Shunlin-
dc.date.accessioned2021-02-25T15:16:55Z-
dc.date.available2021-02-25T15:16:55Z-
dc.date.issued2020-
dc.identifier.citationEarth System Science Data, 2020, v. 12, n. 2, p. 1217-1243-
dc.identifier.issn1866-3508-
dc.identifier.urihttp://hdl.handle.net/10722/296894-
dc.description.abstractLand cover is the physical material at the surface of the Earth. As the cause and result of global environmental change, land cover change (LCC) influences the global energy balance and biogeochemical cycles. Continuous and dynamic monitoring of global LC is urgently needed. Effective monitoring and comprehensive analysis of LCC at the global scale are rare. With the latest version of GLASS (Global Land Surface Satellite) CDRs (climate data records) from 1982 to 2015, we built the first record of 34-year-long annual dynamics of global land cover (GLASS-GLC) at 5 km resolution using the Google Earth Engine (GEE) platform. Compared to earlier global land cover (LC) products, GLASS-GLC is characterized by high consistency, more detail, and longer temporal coverage. The average overall accuracy for the 34 years each with seven classes, including cropland, forest, grassland, shrubland, tundra, barren land, and snow/ice, is 82.81 % based on 2431 test sample units. We implemented a systematic uncertainty analysis and carried out a comprehensive spatiotemporal pattern analysis. Significant changes at various scales were found, including barren land loss and cropland gain in the tropics, forest gain in the Northern Hemisphere, and grassland loss in Asia. A global quantitative analysis of human factors showed that the average human impact level in areas with significant LCC was about 25.49 %. The anthropogenic influence has a strong correlation with the noticeable vegetation gain, especially for forest. Based on GLASS-GLC, we can conduct long-term LCC analysis, improve our understanding of global environmental change, and mitigate its negative impact. GLASS-GLC will be further applied in Earth system modeling to facilitate research on global carbon and water cycling, vegetation dynamics, and climate change. The GLASS-GLC data set presented in this article is available at <a hrefCombining double low line"https://doi.org/10.1594/PANGAEA.913496">https://doi.org/10.1594/PANGAEA.913496</a> (Liu et al., 2020).-
dc.languageeng-
dc.relation.ispartofEarth System Science Data-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleAnnual dynamics of global land cover and its long-term changes from 1982 to 2015-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.5194/essd-12-1217-2020-
dc.identifier.scopuseid_2-s2.0-85085954476-
dc.identifier.volume12-
dc.identifier.issue2-
dc.identifier.spage1217-
dc.identifier.epage1243-
dc.identifier.eissn1866-3516-
dc.identifier.isiWOS:000538408000002-
dc.identifier.issnl1866-3508-

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