{"id":1528442,"date":"2022-03-31T09:00:16","date_gmt":"2022-03-31T16:00:16","guid":{"rendered":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=1528442"},"modified":"2024-08-12T12:35:13","modified_gmt":"2024-08-12T19:35:13","slug":"evapotranspiration-data-in-arcgis-living-atlas-of-the-world","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-living-atlas\/water\/evapotranspiration-data-in-arcgis-living-atlas-of-the-world","title":{"rendered":"Evapotranspiration Data in ArcGIS Living Atlas of the World"},"author":9412,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22941,22771,23051],"tags":[43101,410642,32971,23371,23411],"industry":[],"product":[36581,36551,36561],"class_list":["post-1528442","blog","type-blog","status-publish","format-standard","hentry","category-mapping","category-natural-resources","category-water","tag-arcgis-living-atlas-of-the-world","tag-environment","tag-evapotranspiration","tag-hydrology","tag-water-resources","product-arcgis-living-atlas","product-arcgis-online","product-arcgis-pro"],"acf":{"short_description":"Use evapotranspiration data in Living Atlas from the Operational Simplified Surface Energy Balance (SSEBop).","flexible_content":[{"acf_fc_layout":"content","content":"

Evapotranspiration (ET) is a key component of the water cycle and is useful for many analysis and mapping applications. A new time-enabled imagery layer with monthly ET measurements<\/a> is now available in Living Atlas.<\/p>\n

Understanding Evapotranspiration<\/h2>\n

Evapotranspiration represents the water that flows from the landscape into the atmosphere. ET combines the water fluxes from (1) direct soil evaporation, (2) evaporation from intercepted precipitation on trees, branches, and leaves, and (3) transpiration from plants.<\/p>\n

Evapotranspiration is a complex physical process. It is dependent on temperature, humidity, wind speed and other atmospheric conditions. ET is difficult to measure with traditional methods. Estimates from remote sensing<\/a> and global models provide useful ET values for a range of applications, from calculating water balances to assessment of water consumption. ET is part of the earth\u2019s water balance<\/a>, having a time-series of spatially uniform ET data sets is a scientific step forward.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":1535932,"id":1535932,"title":"Evapotranspiration-in-the-Nile-River-and-the-Mekong-River-Deltas","filename":"EvapoNileMekong2.jpg","filesize":296565,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2.jpg","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-living-atlas\/water\/evapotranspiration-data-in-arcgis-living-atlas-of-the-world\/evaponilemekong2","alt":"Evapotranspiration in the Nile River and the Mekong River Deltas","author":"9412","description":"","caption":"","name":"evaponilemekong2","status":"inherit","uploaded_to":1528442,"date":"2022-03-29 12:37:25","modified":"2022-03-29 12:37:45","menu_order":0,"mime_type":"image\/jpeg","type":"image","subtype":"jpeg","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":1667,"height":1667,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2-213x200.jpg","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2.jpg","medium-width":261,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2.jpg","medium_large-width":768,"medium_large-height":768,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2.jpg","large-width":1080,"large-height":1080,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2-1536x1536.jpg","1536x1536-width":1536,"1536x1536-height":1536,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2.jpg","2048x2048-width":1667,"2048x2048-height":1667,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2-465x465.jpg","card_image-width":465,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2-1080x1080.jpg","wide_image-width":1080,"wide_image-height":1080}},"image_position":"left-center","orientation":"horizontal","hyperlink":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/EvapoNileMekong2.jpg"},{"acf_fc_layout":"content","content":"

The Operational Simplified Surface Energy Balance (SSEBop)<\/h3>\n

The Operational Simplified Surface Energy Balance (SSEBop)<\/a> is a remote sensing-based model that provides evapotranspiration estimates. SSEBop uses the Simplified Surface Energy Balance (SSEBop) model and ET fractions from NASA’s Moderate Resolution Imaging Spectroradiometer (MODIS) and predefined parameters for operational applications.<\/p>\n"},{"acf_fc_layout":"content","content":"

Time-enabled image service<\/h3>\n

The Monthly Actual Evapotranspiration (SSEBop) image service in Living Atlas provides monthly ET rasters from January 2003 to the present with a 0.01 degrees (~1km) spatial resolution. As a time-enabled image service, the evapotranspiration layer shows seasonal changes across the landscape from dry seasons to rainy seasons and the greening of the vegetation.<\/p>\n"},{"acf_fc_layout":"image","image":{"ID":1530022,"id":1530022,"title":"Evapotranspiration in North America (2021)","filename":"USA-and-Mexico-720.gif","filesize":2305794,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-living-atlas\/water\/evapotranspiration-data-in-arcgis-living-atlas-of-the-world\/usa-and-mexico-720","alt":"Evapotranspiration_in_North_America_2021","author":"9412","description":"","caption":"Monthly Evapotranspiration in North America for 2021","name":"usa-and-mexico-720","status":"inherit","uploaded_to":1528442,"date":"2022-03-24 13:54:53","modified":"2022-03-29 12:50:06","menu_order":0,"mime_type":"image\/gif","type":"image","subtype":"gif","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":1280,"height":720,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720-213x200.gif","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","medium-width":464,"medium-height":261,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","medium_large-width":768,"medium_large-height":432,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","large-width":1280,"large-height":720,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","1536x1536-width":1280,"1536x1536-height":720,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","2048x2048-width":1280,"2048x2048-height":720,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720-826x465.gif","card_image-width":826,"card_image-height":465,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2022\/03\/USA-and-Mexico-720.gif","wide_image-width":1280,"wide_image-height":720}},"image_position":"left-center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

Live Feed updates<\/h3>\n

The Monthly Actual Evapotranspiration (SSEBop)<\/a> image service is automatically updated every month as new data becomes available. The update process is carried out by a live feed routine. This live feed routine allows the service to display the latest information available seamlessly without service interruptions.<\/p>\n

Using ET Information in GIS<\/h2>\n

Conservation of ecosystems<\/h3>\n

High evapotranspiration values during dry seasons in natural areas such as wetlands or deltas show how these ecosystems are dependent on upstream water flows. A basin-wide integrated water resources management (IWRM)<\/a> approach can be implemented to carry out development while also promoting conservation of critical areas.<\/p>\n

The Okavango River Delta<\/a> is a unique ecosystem, its wetland accommodates one of the largest and most diverse assemble of plants and wildlife in the world. The Okavango River floods the wetland during the dry season, supporting the local and regional biodiversity at this critical time of the year. As an inland Delta, the water of the Okavango River does not reach the ocean, thus its water flow is eventually measured as ET.<\/p>\n"},{"acf_fc_layout":"youtube","start_time":"0","end_time":"","youtube_video_url":"http:\/\/ https:\/\/youtu.be\/hbGP-SltkGk<\/a>"},{"acf_fc_layout":"content","content":"

 <\/p>\n

Monitoring protected areas<\/h3>\n

Evapotranspiration can be used to monitor the health of vegetation in protected areas, providing an early warning during dry spells. Moreover, sharp decreases in ET in a region support the efforts to identify illegal development areas and landscape transformation activities.<\/p>\n

In the states of Par\u00e1 and Mato Grosso in Brazil, ET highlights the difference between protected areas and areas under development. In areas under development, the forest cover has decreased and therefore the natural process of ET has been reduced. Areas subject to some degree of environmental protection as those shown in the World Database on Protected Areas (WDPA)<\/a> have maintained their seasonal ET patterns.<\/p>\n"},{"acf_fc_layout":"youtube","start_time":"0","end_time":"","youtube_video_url":"