{"id":347,"date":"2017-06-16T18:22:23","date_gmt":"2017-06-16T18:22:23","guid":{"rendered":"http:\/\/edgecubewp.lbym.org\/?page_id=347"},"modified":"2017-07-27T22:45:15","modified_gmt":"2017-07-27T22:45:15","slug":"red-edge-and-terrestrial-vegetation","status":"publish","type":"page","link":"https:\/\/edgecubewp.lbym.org\/?page_id=347","title":{"rendered":"RedEdge &#038; Terrestrial Vegetation"},"content":{"rendered":"<p>As a prototype project, EdgeCube could turn out to be a better\u00a0<em>climate change<\/em> monitor. EdgeCube could be replicated to provide a constellation of nanosats that monitor the earth\u2019s surface for decades, providing quantitative\u00a0measures of the effects of climate <em>change<\/em> on <em>ecosystem<\/em> <em>phenology<\/em>, <em>productivity<\/em> and <em>health<\/em>, such as shifts in growing season initiation and duration.<\/p>\n<p>&nbsp;<\/p>\n<p>Our team propose a global measurement of the red edge that monitors a sharp change in leaf reflectance in the range 680 to 750 nm from changes in vegetation chlorophyll absorption and mesophyll scattering due to seasonal leaf phenology or stress.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-272 alignleft\" src=\"http:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/hh-1.bmp\" alt=\"\" width=\"432\" height=\"433\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-456 alignleft\" src=\"http:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/Spectral_Signature_BayArea_2015_RDN-1024x609.jpg\" alt=\"\" width=\"597\" height=\"355\" srcset=\"https:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/Spectral_Signature_BayArea_2015_RDN-1024x609.jpg 1024w, https:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/Spectral_Signature_BayArea_2015_RDN-300x178.jpg 300w, https:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/Spectral_Signature_BayArea_2015_RDN-768x457.jpg 768w, https:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/Spectral_Signature_BayArea_2015_RDN.jpg 1123w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>The picture is an example of a red edge spectrum for different colors Sweetgum leaves (derived from Jensen 2000).\u00a0Gray lines indicate\u00a0seven nominal narrow band spectral filters under consideration for the EdgeCube\u00a0science instrument.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>The map below is the Terrestrial sampling locations for the EdgeCube assuming 300 km spacing and global\u00a0coverage between +-50 degrees latitude. Analysis will focus on those locations in areas of relatively homogenous natural land cover (red dots). Credit: M. Clark and R.\u00a0Caldwell.<\/p>\n<p><a href=\"http:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/hh.bmp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-219\" src=\"http:\/\/edgecubewp.lbym.org\/wp-content\/uploads\/2017\/06\/hh.bmp\" alt=\"\" width=\"1490\" height=\"846\" \/><\/a><\/p>\n<h4>For the mission, the accurate measurement of change depends on the calibration and stability of the sensors.\u00a0EdgeCube will help to determine how to deal with these types of systematic errors.<\/h4>\n<p>&nbsp;<\/p>\n<p>Vegetation indices based on the contrast between red and NIR\u00a0reflectance, such as Normalized Difference Vegetation Index (NDVI) tend to saturate in\u00a0sensitivity at higher levels of vegetation structure (Wang et al., 2005). Brantley et al. (2011)\u00a0have shown that red edge measurements of high LAI canopies are accurate proxies to monitor\u00a0changes in these types of ecosystems without as much saturation<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As a prototype project, EdgeCube could turn out to be a better\u00a0climate change monitor. EdgeCube could be replicated to provide a constellation of nanosats that monitor the earth\u2019s surface for decades, providing quantitative\u00a0measures of the effects of climate change on ecosystem phenology, productivity and health, such as shifts in growing season initiation and duration. &nbsp; [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-347","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=\/wp\/v2\/pages\/347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=347"}],"version-history":[{"count":37,"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=\/wp\/v2\/pages\/347\/revisions"}],"predecessor-version":[{"id":478,"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=\/wp\/v2\/pages\/347\/revisions\/478"}],"wp:attachment":[{"href":"https:\/\/edgecubewp.lbym.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}