{"id":1168,"date":"2024-07-24T09:39:02","date_gmt":"2024-07-24T08:39:02","guid":{"rendered":"https:\/\/research.reading.ac.uk\/palaeoclimate\/?p=1168"},"modified":"2024-07-24T09:39:02","modified_gmt":"2024-07-24T08:39:02","slug":"temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening","status":"publish","type":"post","link":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/","title":{"rendered":"Temporally enhanced vegetation dataset indicates persistent global greening."},"content":{"rendered":"

Introduction<\/strong><\/p>\n

Group leader Sandy Harrison<\/a> recently published a manuscript in the journal remote sensing of the environment as part of the LEMONTREE project<\/a>. The work was led by Sungchan Jeong<\/a> who is a member of the LEMONTREE team based at Seoul National University. The new research highlights how satellite remote sensing data can be used to improve the accuracy of vegetation index datasets.<\/p>\n

The problem<\/u><\/p>\n

The paper \u201cPersistent global greening over the last four decades using novel long-term vegetation index data with enhanced temporal consistency\u201d<\/em> focuses on improving the temporal consistency of long-term vegetation index datasets. Advanced Very High-Resolution Radiometer (AVHRR) sensors on satellites produce some of the world\u2019s longest data measurements on land surfaces and have been used to derive vegetation indexes, amongst other products. However, a number of studies have pointed out that there are issues with the AVHRR derived datasets including temporal inconsistencies, orbital shifting and incomplete harmonization with other satellite products.<\/p>\n

Methods and Results<\/u><\/p>\n

This study addressed residual temporal inconsistency in the LTDR V5 dataset through a three-step post-processing, which includes cross sensor-calibration between AVHRR sensors, orbital drifting correction among AVHRR sensors, and a machine-learning based harmonization with MODIS.<\/p>\n

Each different processing level of spectral reflectance and vegetation index were comprehensively evaluated across the pseudo-invariant calibration sites (PICS). After a three-step post-processing was applied, the remaining temporal inconsistencies in the long-term datasets were substantially reduced.<\/p>\n

The refined long-term normalized difference vegetation index (NDVI) and near-infrared reflectance of vegetation (NIRv) datasets showed a persistent global greening trend over the last four decades. This is in contrast with previous studies which have demonstrated a decline in global greening since 2000.<\/p>\n

\"\"<\/u><\/p>\n

Figure 1: A comparison of the global greening trends extracted from the Seoul National University model (SNU LTDR), GIMMS3g and LTDR V5.<\/em><\/p>\n

Conclusions<\/u><\/p>\n

Improving temporal consistencies within datasets, therefore, are crucial to improving accuracy of vegetation index datasets allowing us to more accurately predict global vegetation trends, particularly in the context of climate change. Remaining artefacts in long-term satellite remote sensing datasets have hindered a robust evaluation of land surface models. Moving forward, this new dataset can help us better understand global vegetation dynamics<\/p>\n

To read the full version of this paper see the citation and link below:<\/p>\n

Jeong, S., Ryu, Y., Gentine, P., Lian, X., Fang, J., Li, X.,\u00a0Dechant, B., Kong, J., Choi, W., Jiang, C.,\u00a0Keenan, T.I., Harrison, S.P., Prentice, I.C.\u00a02024 Persistent global greening over the last four decades using novel long-term vegetation index data with enhanced temporal consistency. Remote Sensing of Environment<\/em>\u00a0311, 114282,\u00a0https:\/\/doi.org\/10.1016\/j.rse.2024.114282<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Introduction Group leader Sandy Harrison recently published a manuscript in the journal remote sensing of the environment as part of the LEMONTREE project. The work was led by Sungchan Jeong…Read More ><\/a><\/p>\n","protected":false},"author":959,"featured_media":1169,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"__cvm_playback_settings":[],"__cvm_video_id":"","footnotes":""},"categories":[22],"tags":[30,2,53],"class_list":["post-1168","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-model-evaluation","tag-publication","tag-vegetation"],"acf":[],"yoast_head":"\nTemporally enhanced vegetation dataset indicates persistent global greening. - SPECIAL Palaeoclimate<\/title>\n<meta name=\"description\" content=\"Group leader Sandy Harrison has recently published a study alongside collaborators of the LEMONTREE project on a novel-approach to improving vegetation-index datasets.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Temporally enhanced vegetation dataset indicates persistent global greening. - SPECIAL Palaeoclimate\" \/>\n<meta property=\"og:description\" content=\"Group leader Sandy Harrison has recently published a study alongside collaborators of the LEMONTREE project on a novel-approach to improving vegetation-index datasets.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/\" \/>\n<meta property=\"og:site_name\" content=\"SPECIAL Palaeoclimate\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-24T08:39:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-content\/uploads\/sites\/78\/2024\/07\/SungchanPost1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1351\" \/>\n\t<meta property=\"og:image:height\" content=\"747\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Sophia Cain\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Sophia Cain\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/\",\"url\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/\",\"name\":\"Temporally enhanced vegetation dataset indicates persistent global greening. - SPECIAL Palaeoclimate\",\"isPartOf\":{\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/#website\"},\"datePublished\":\"2024-07-24T08:39:02+00:00\",\"dateModified\":\"2024-07-24T08:39:02+00:00\",\"author\":{\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/#\/schema\/person\/6ae1715d9ded9f0caa51878ed800cdc9\"},\"description\":\"Group leader Sandy Harrison has recently published a study alongside collaborators of the LEMONTREE project on a novel-approach to improving vegetation-index datasets.\",\"breadcrumb\":{\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Temporally enhanced vegetation dataset indicates persistent global greening.\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/#website\",\"url\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/\",\"name\":\"SPECIAL Palaeoclimate\",\"description\":\"Webpage of Sandy's PalaeoEnvironments and Climate Analysis research group at the University of Reading (UK)\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/#\/schema\/person\/6ae1715d9ded9f0caa51878ed800cdc9\",\"name\":\"Sophia Cain\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/a4b6b71e445f4365e2434d381d6a4e6733a438e4ce1c59fbbd12a0e11cf74672?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/a4b6b71e445f4365e2434d381d6a4e6733a438e4ce1c59fbbd12a0e11cf74672?s=96&d=mm&r=g\",\"caption\":\"Sophia Cain\"},\"url\":\"https:\/\/research.reading.ac.uk\/palaeoclimate\/author\/kw931720\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Temporally enhanced vegetation dataset indicates persistent global greening. - SPECIAL Palaeoclimate","description":"Group leader Sandy Harrison has recently published a study alongside collaborators of the LEMONTREE project on a novel-approach to improving vegetation-index datasets.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/","og_locale":"en_GB","og_type":"article","og_title":"Temporally enhanced vegetation dataset indicates persistent global greening. - SPECIAL Palaeoclimate","og_description":"Group leader Sandy Harrison has recently published a study alongside collaborators of the LEMONTREE project on a novel-approach to improving vegetation-index datasets.","og_url":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/","og_site_name":"SPECIAL Palaeoclimate","article_published_time":"2024-07-24T08:39:02+00:00","og_image":[{"width":1351,"height":747,"url":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-content\/uploads\/sites\/78\/2024\/07\/SungchanPost1.png","type":"image\/png"}],"author":"Sophia Cain","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Sophia Cain","Estimated reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/","url":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/","name":"Temporally enhanced vegetation dataset indicates persistent global greening. - SPECIAL Palaeoclimate","isPartOf":{"@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/#website"},"datePublished":"2024-07-24T08:39:02+00:00","dateModified":"2024-07-24T08:39:02+00:00","author":{"@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/#\/schema\/person\/6ae1715d9ded9f0caa51878ed800cdc9"},"description":"Group leader Sandy Harrison has recently published a study alongside collaborators of the LEMONTREE project on a novel-approach to improving vegetation-index datasets.","breadcrumb":{"@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/temporally-enhanced-vegetation-dataset-indicates-persistent-global-greening\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/research.reading.ac.uk\/palaeoclimate\/"},{"@type":"ListItem","position":2,"name":"Temporally enhanced vegetation dataset indicates persistent global greening."}]},{"@type":"WebSite","@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/#website","url":"https:\/\/research.reading.ac.uk\/palaeoclimate\/","name":"SPECIAL Palaeoclimate","description":"Webpage of Sandy's PalaeoEnvironments and Climate Analysis research group at the University of Reading (UK)","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/research.reading.ac.uk\/palaeoclimate\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-GB"},{"@type":"Person","@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/#\/schema\/person\/6ae1715d9ded9f0caa51878ed800cdc9","name":"Sophia Cain","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/research.reading.ac.uk\/palaeoclimate\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/a4b6b71e445f4365e2434d381d6a4e6733a438e4ce1c59fbbd12a0e11cf74672?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/a4b6b71e445f4365e2434d381d6a4e6733a438e4ce1c59fbbd12a0e11cf74672?s=96&d=mm&r=g","caption":"Sophia Cain"},"url":"https:\/\/research.reading.ac.uk\/palaeoclimate\/author\/kw931720\/"}]}},"cc_featured_image_caption":{"caption_text":"","source_text":"","source_url":""},"_links":{"self":[{"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/posts\/1168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/users\/959"}],"replies":[{"embeddable":true,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/comments?post=1168"}],"version-history":[{"count":1,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/posts\/1168\/revisions"}],"predecessor-version":[{"id":1170,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/posts\/1168\/revisions\/1170"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/media\/1169"}],"wp:attachment":[{"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/media?parent=1168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/categories?post=1168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/research.reading.ac.uk\/palaeoclimate\/wp-json\/wp\/v2\/tags?post=1168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}