This repository contains scripts and resources for calculating Cumulative Water Deficit (CWD) and Maximum Cumulative Water Deficit (MCWD) using Google Earth Engine (GEE). The project focuses on the Brazilian territory, with data processed on a 0.25° spatial grid, aiming to evaluate precipitation and evapotranspiration dynamics in order better to characterize drought intensity, duration, and spatial distribution. By leveraging GEE’s cloud-computing capabilities, the workflow ensures efficient and scalable processing of long-term climate datasets.
\nCalculation of CWD and MCWD tailored for Brazil on a 0.25° grid.
\nAutomated processing, integration, and visualization within GEE.
\nUse of precipitation and evapotranspiration data from multiple sources to enhance drought monitoring.
\nThe implementation of CWD and MCWD in this repository builds on methodologies proposed in leading scientific studies on Amazonian droughts and fire impacts, including:
\nAragão, L.E.O.C., Malhi, Y., Roman-Cuesta, R.M., Saatchi, S., Anderson, L.O., & Shimabukuro, Y.E. (2007). Spatial patterns and fire response of recent Amazonian droughts. Geophysical Research Letters. https://doi.org/10.1029/2006GL028946
\nAragão, L.E.O.C., Anderson, L.O., Fonseca, M.G., Rosan, T.M., Vedovato, L.B., Wagner, F.H., Silva, C.V.J., Silva Junior, C.H.L., et al. (2018). 21st Century drought-related fires counteract the decline of Amazon deforestation carbon emissions. Nature Communications, 9, 536. https://doi.org/10.1038/s41467-017-02771-y
\nEvapotranspiration: geeSEBAL-MODIS (2003–2024) – projects/et-brasil/assets/geesebal/myd11a2/sa/v0-02
Comini, B., Ruhoff, A., Laipelt, L., Fleischmann, A., Huntington, J., Morton, C., Melton, F., Erickson, T., Roberti, D., Souza, V., Biudes, M., Machado, N., Santos, C., & Cosio, E. (2023). geeSEBAL-MODIS: Continental scale evapotranspiration based on the surface energy balance for South America. DOI: 10.13140/RG.2.2.17579.11041
Precipitation: CHIRPS Daily (UCSB-CHG/CHIRPS/DAILY)
Funk, C., Peterson, P., Landsfeld, M., Pedreros, D., Verdin, J., Shukla, S., Husak, G., Rowland, J., Harrison, L., Hoell, A., & Michaelsen, J. (2015). The Climate Hazards Infrared Precipitation with Stations (CHIRPS): A new environmental record for monitoring extremes. Scientific Data, 2, 150066. DOI: 10.1038/sdata.2015.66
This project provides a methodological framework for researchers and practitioners in climate science, hydrology, ecology, and environmental management in Brazil who aim to quantify drought conditions and support adaptation and mitigation strategies.
\nIf you use this repository, please cite the following DOI: 10.5281/zenodo.14635469.
", "funding": [ { "award": { "number": "001", "title": { "en": "Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior" } }, "funder": { "id": "00x0ma614", "name": "Coordena\u00e7\u00e3o de Aperfeicoamento de Pessoal de N\u00edvel Superior" } } ], "languages": [ { "id": "eng", "title": { "en": "English" } } ], "publication_date": "2025-08-21", "publisher": "Zenodo", "resource_type": { "id": "dataset", "title": { "de": "Datensatz", "en": "Dataset" } }, "rights": [ { "description": { "en": "The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited." }, "icon": "cc-by-icon", "id": "cc-by-4.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/licenses/by/4.0/legalcode" }, "title": { "en": "Creative Commons Attribution 4.0 International" } } ], "subjects": [ { "subject": "Cumulative Water Deficit" }, { "subject": "Google Earth Engine" }, { "subject": "Precipitation Analysis" }, { "subject": "Drought Monitoring" }, { "subject": "Climate Science" }, { "subject": "Brazil" } ], "title": "Brazilian Dataset of Cumulative Water Deficit (CWD) and Maximum Cumulative Water Deficit (MCWD) Derived from Google Earth Engine", "version": "1" }, "parent": { "access": { "owned_by": { "user": "1019643" }, "settings": { "accept_conditions_text": null, "allow_guest_requests": false, "allow_user_requests": false, "secret_link_expiration": 0 } }, "communities": { "default": "6b22811d-eb1b-4ef5-866a-081a8507a191", "entries": [ { "access": { "member_policy": "open", "members_visibility": "public", "record_submission_policy": "open", "review_policy": "closed", "visibility": "public" }, "children": { "allow": false }, "created": "2025-05-08T13:56:53.394014+00:00", "custom_fields": {}, "deletion_status": { "is_deleted": false, "status": "P" }, "id": "66391ca0-b7ff-44e5-87fe-f8b4bd80332c", "links": {}, "metadata": { "description": "FLORESTA studies forest ecosystems, fire risk, and environmental change. Using technology and science, it analyzes landscape transformations to support sustainable forest management and strategies to reduce fire impacts and environmental degradation.", "organizations": [ { "name": "deh_dutra" } ], "title": "FLORESTA - Forest and Landscape Observation for Risk, Environment, Sustainability, and Technology Analysis", "type": { "id": "project" } }, "revision_id": 4, "slug": "floresta", "updated": "2025-05-08T14:08:56.921000+00:00" }, { "access": { "member_policy": "open", "members_visibility": "public", "record_submission_policy": "open", "review_policy": "closed", "visibility": "public" }, "children": { "allow": false }, "created": "2023-11-07T12:14:56.240567+00:00", "custom_fields": {}, "deletion_status": { "is_deleted": false, "status": "P" }, "id": "6b22811d-eb1b-4ef5-866a-081a8507a191", "links": {}, "metadata": { "curation_policy": "", "description": "TREES laboratory is a research group led by Dr. Luiz Arag\u00e3o and Dr. Liana Anderson. The group expertise is on assessing the impacts of environmental changes on tropical ecosystems using remote sensing and field surveys.", "organizations": [ { "id": "04xbn6x09" }, { "id": "00114hq16" } ], "page": "TREES laboratory is a research group co-led by Dr Luiz Aragão and Dr Liana Anderson. The group was created in 2009 when Dr Aragão moved from the Environmental Change Institute, University of Oxford to the School of Life and Environmental Sciences, University of Exeter in UK. Dr Aragão is now based at the National Institute for Space Research in Brazil, the current headquarters of TREES. Dr Liana Anderson is currently based at The National Center for Monitoring and Early Warning of Natural Disasters (CEMADEN), Brazil. The group's expertise is on assessing the risks and impacts of environmental changes on tropical ecosystems using remote sensing and field surveys. TREES members are trained in a multidisciplinary range of techniques and a multitude of instrumentation, technologies and approaches.
\nFor more information, please visit us at https://www.treeslab.org/
", "title": "TRopical Ecosystems and Environmental Sciences lab (TREES)", "type": { "id": "organization" }, "website": "http://www.treeslab.org/" }, "revision_id": 9, "slug": "treeslab", "updated": "2024-01-22T16:45:20.906535+00:00" } ], "ids": [ "66391ca0-b7ff-44e5-87fe-f8b4bd80332c", "6b22811d-eb1b-4ef5-866a-081a8507a191" ] }, "id": "14635468", "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.14635468", "provider": "datacite" } } }, "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.14635469", "provider": "datacite" }, "oai": { "identifier": "oai:zenodo.org:14635469", "provider": "oai" } }, "revision_id": 4, "stats": { "all_versions": { "data_volume": 6096790196.0, "downloads": 674, "unique_downloads": 618, "unique_views": 695, "views": 749 }, "this_version": { "data_volume": 3767897252.0, "downloads": 425, "unique_downloads": 377, "unique_views": 462, "views": 495 } }, "status": "published", "swh": {}, "updated": "2025-08-21T17:10:56.986288+00:00", "versions": { "index": 1, "is_latest": false } }