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2. The Digital Twin Earth Hydrology Platform

Author

Brocca, Luca, speaker, Alfieri, Lorenzo, speaker, Amarnath, Giriraj, speaker, Vreugdenhil, Mariette, speaker, and Pechlivanidis, Ilias, speaker

Abstract

Climate change is profoundly affecting the global water cycle, increasing the likelihood and severity of extreme water-related events. Better decision-support systems are vital to accurately predict and monitor water-related environmental disasters and optimally manage water resources. These must integrate advances in remote sensing, in situ, and citizen observations with high-resolution Earth system modeling, artificial intelligence (AI), information and communication technologies, and high-performance computing. Digital Twin Earth (DTE) models are a ground-breaking solution offering digital replicas to monitor and simulate Earth processes with unprecedented spatiotemporal resolution. Advances in Earth observation (EO) satellite technology are pivotal, and here we provide a roadmap for the exploitation of these methods in a DTE for hydrology. The 4-dimensional DTE Hydrology datacube now fuses high-resolution EO data and advanced modeling of soil moisture, precipitation, evaporation, and river discharge, and here we report the latest validation data in the Mediterranean Basin. This system can now be explored to forecast flooding and landslides and to manage irrigation for precision agriculture. Large-scale implementation of such methods will require further advances to assess high-resolution products across different regions and climates; create and integrate compatible multidimensional datacubes, EO data retrieval algorithms, and models that are suitable across multiple scales; manage uncertainty both in EO data and models; enhance computational capacity via an interoperable, cloud-based processing environment embodying open data principles; and harness AI/machine learning. We outline how various planned satellite missions will further facilitate a DTE for hydrology toward global benefit if the scientific and technological challenges we identify are addressed.

Published
2024
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4. Irrigation in the Earth system

Author

McDermid, Sonali, Nocco, Mallika, Lawston-Parker, Patricia, Keune, Jessica, Pokhrel, Yadu, Jain, Meha, Jägermeyr, Jonas, Brocca, Luca, Massari, Christian, Jones, Andrew D., Vahmani, Pouya, Thiery, Wim, Yao, Yi, Bell, Andrew, Chen, Liang, Dorigo, Wouter, Hanasaki, Naota, Jasechko, Scott, Lo, Min-Hui, Mahmood, Rezaul, Mishra, Vimal, Mueller, Nathaniel D., Niyogi, Dev, Rabin, Sam S., Sloat, Lindsey, Wada, Yoshihide, Zappa, Luca, Chen, Fei, Cook, Benjamin I., Kim, Hyungjun, Lombardozzi, Danica, Polcher, Jan, Ryu, Dongryeol, Santanello, Joe, Satoh, Yusuke, Seneviratne, Sonia, Singh, Deepti, and Yokohata, Tokuta

Published
2023
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7. Altimetry for the future: Building on 25 years of progress

Author

Team, International Altimetry, Abdalla, Saleh, Kolahchi, Abdolnabi Abdeh, Ablain, Michaël, Adusumilli, Susheel, Bhowmick, Suchandra Aich, Alou-Font, Eva, Amarouche, Laiba, Andersen, Ole Baltazar, Antich, Helena, Aouf, Lotfi, Arbic, Brian, Armitage, Thomas, Arnault, Sabine, Artana, Camila, Aulicino, Giuseppe, Ayoub, Nadia, Badulin, Sergei, Baker, Steven, Banks, Chris, Bao, Lifeng, Barbetta, Silvia, Barceló-Llull, Bàrbara, Barlier, François, Basu, Sujit, Bauer-Gottwein, Peter, Becker, Matthias, Beckley, Brian, Bellefond, Nicole, Belonenko, Tatyana, Benkiran, Mounir, Benkouider, Touati, Bennartz, Ralf, Benveniste, Jérôme, Bercher, Nicolas, Berge-Nguyen, Muriel, Bettencourt, Joao, Blarel, Fabien, Blazquez, Alejandro, Blumstein, Denis, Bonnefond, Pascal, Borde, Franck, Bouffard, Jérôme, Boy, François, Boy, Jean-Paul, Brachet, Cédric, Brasseur, Pierre, Braun, Alexander, Brocca, Luca, Brockley, David, Brodeau, Laurent, Brown, Shannon, Bruinsma, Sean, Bulczak, Anna, Buzzard, Sammie, Cahill, Madeleine, Calmant, Stéphane, Calzas, Michel, Camici, Stefania, Cancet, Mathilde, Capdeville, Hugues, Carabajal, Claudia Cristina, Carrere, Loren, Cazenave, Anny, Chassignet, Eric P, Chauhan, Prakash, Cherchali, Selma, Chereskin, Teresa, Cheymol, Cecile, Ciani, Daniele, Cipollini, Paolo, Cirillo, Francesca, Cosme, Emmanuel, Coss, Steve, Cotroneo, Yuri, Cotton, David, Couhert, Alexandre, Coutin-Faye, Sophie, Crétaux, Jean-François, Cyr, Frederic, d’Ovidio, Francesco, Darrozes, José, David, Cedric, Dayoub, Nadim, De Staerke, Danielle, Deng, Xiaoli, Desai, Shailen, Desjonqueres, Jean-Damien, Dettmering, Denise, Di Bella, Alessandro, Díaz-Barroso, Lara, Dibarboure, Gerald, Dieng, Habib Boubacar, Dinardo, Salvatore, Dobslaw, Henryk, Dodet, Guillaume, Doglioli, Andrea, Domeneghetti, Alessio, Donahue, David, and Dong, Shenfu

Subjects
Life Below Water, Climate Action, Satellite altimetry, Oceanography, Sea level, Coastal oceanography, Cryospheric sciences, Hydrology, Astronomical and Space Sciences, Aerospace Engineering, Mechanical Engineering, Aerospace & Aeronautics
Abstract

In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th (2012) years of progress and more recently, in 2018, in Ponta Delgada, Portugal, 25 Years of Progress in Radar Altimetry. On this latter occasion it was decided to collect contributions of scientists, engineers and managers involved in the worldwide altimetry community to depict the state of altimetry and propose recommendations for the altimetry of the future. This paper summarizes contributions and recommendations that were collected and provides guidance for future mission design, research activities, and sustainable operational radar altimetry data exploitation. Recommendations provided are fundamental for optimizing further scientific and operational advances of oceanographic observations by altimetry, including requirements for spatial and temporal resolution of altimetric measurements, their accuracy and continuity. There are also new challenges and new openings mentioned in the paper that are particularly crucial for observations at higher latitudes, for coastal oceanography, for cryospheric studies and for hydrology. The paper starts with a general introduction followed by a section on Earth System Science including Ocean Dynamics, Sea Level, the Coastal Ocean, Hydrology, the Cryosphere and Polar Oceans and the “Green” Ocean, extending the frontier from biogeochemistry to marine ecology. Applications are described in a subsequent section, which covers Operational Oceanography, Weather, Hurricane Wave and Wind Forecasting, Climate projection. Instruments’ development and satellite missions’ evolutions are described in a fourth section. A fifth section covers the key observations that altimeters provide and their potential complements, from other Earth observation measurements to in situ data. Section 6 identifies the data and methods and provides some accuracy and resolution requirements for the wet tropospheric correction, the orbit and other geodetic requirements, the Mean Sea Surface, Geoid and Mean Dynamic Topography, Calibration and Validation, data accuracy, data access and handling (including the DUACS system). Section 7 brings a transversal view on scales, integration, artificial intelligence, and capacity building (education and training). Section 8 reviews the programmatic issues followed by a conclusion.

Published
2021

12. Closing the Water Cycle from Observations across Scales : Where Do We Stand?

Author

Dorigo, Wouter, Dietrich, Stephan, Aires, Filipe, Brocca, Luca, Carter, Sarah, Cretaux, Jean-François, Dunkerley, David, Enomoto, Hiroyuki, Forsberg, René, Güntner, Andreas, Hegglin, Michaela I., Hollmann, Rainer, Hurst, Dale F., Johannessen, Johnny A., Kummerow, Christian, Lee, Tong, Luojus, Kari, Looser, Ulrich, Miralles, Diego G., Pellet, Victor, Recknagel, Thomas, Vargas, Claudia Ruz, Schneider, Udo, Schoeneich, Philippe, Schröder, Marc, Tapper, Nigel, Vuglinsky, Valery, Wagner, Wolfgang, Yu, Lisan, Zappa, Luca, Zemp, Michael, and Aich, Valentin

Published
2021

13. Author Correction: Irrigation in the Earth system

Author

McDermid, Sonali, Nocco, Mallika, Lawston-Parker, Patricia, Keune, Jessica, Pokhrel, Yadu, Jain, Meha, Jägermeyr, Jonas, Brocca, Luca, Massari, Christian, Jones, Andrew D., Vahmani, Pouya, Thiery, Wim, Yao, Yi, Bell, Andrew, Chen, Liang, Dorigo, Wouter, Hanasaki, Naota, Jasechko, Scott, Lo, Min-Hui, Mahmood, Rezaul, Mishra, Vimal, Mueller, Nathaniel D., Niyogi, Dev, Rabin, Sam S., Sloat, Lindsey, Wada, Yoshihide, Zappa, Luca, Chen, Fei, Cook, Benjamin I., Kim, Hyungjun, Lombardozzi, Danica, Polcher, Jan, Ryu, Dongryeol, Santanello, Joe, Satoh, Yusuke, Seneviratne, Sonia, Singh, Deepti, and Yokohata, Tokuta

Published
2023
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20. CIrrMap250: annual maps of China's irrigated cropland from 2000 to 2020 developed through multisource data integration.

Author

Zhang, Ling, Xie, Yanhua, Zhu, Xiufang, Ma, Qimin, and Brocca, Luca

Abstract

Accurate maps of irrigation extent and dynamics are crucial for studying food security and its far-reaching impacts on Earth systems and the environment. While several efforts have been made to map irrigated area in China, few have provided multiyear maps, incorporated national land surveys, addressed data discrepancies, and considered the fractional coverage of cropland within coarse-resolution pixels. Here, we addressed these important gaps and developed new annual maps of China's irrigated cropland from 2000 to 2020, named CIrrMap250 (China's irrigation map with a 250 m resolution). We harmonized irrigation statistics and surveys and reconciled them with remote sensing data. The refined estimates of irrigated area were then integrated with multiple remote sensing data (i.e. vegetation indices, hybrid cropland products, and paddy field maps) and an irrigation suitability map by means of a semi-automatic training approach. We evaluated our CIrrMap250 maps using ∼ 20 000 reference samples, high-resolution irrigation water withdrawal data, and existing local to nationwide maps. Our CIrrMap250 maps demonstrated an overall accuracy of 0.79–0.88 for the years 2000, 2010, and 2020 and outperformed currently available maps. The CIrrMap250-estimated irrigation area explained 50 %–60 % of the variance in irrigation water withdrawal across China. CIrrMap250 revealed that China's irrigation area increased by about 180 000 km2 (or 25 %) from 2000 to 2020, with the majority (61 %) occurring in the water-unsustainable regions facing severe to extreme water stress. Moreover, our product unveiled a noticeable northward shift of China's irrigation area, attributed to substantial expansions in irrigated cropland across northeastern and northwestern China. The accurate representation of irrigation extent in CIrrMap250 will greatly support hydrologic, agricultural, and climate studies in China, aiding in improved water and land resources management. CIrrMap250 can be accessed at https://doi.org/10.6084/m9.figshare.24814293.v2 (Zhang et al., 2023a). [ABSTRACT FROM AUTHOR]

Published
2024
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23. Soil Moisture Memory: State‐Of‐The‐Art and the Way Forward

Author

Rahmati, Mehdi, primary, Amelung, Wulf, additional, Brogi, Cosimo, additional, Dari, Jacopo, additional, Flammini, Alessia, additional, Bogena, Heye, additional, Brocca, Luca, additional, Chen, Hao, additional, Groh, Jannis, additional, Koster, Randal D., additional, McColl, Kaighin A., additional, Montzka, Carsten, additional, Moradi, Shirin, additional, Rahi, Arash, additional, Sharghi S., Farnaz, additional, and Vereecken, Harry, additional

Published
2024
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25. Soil Moisture and Precipitation: The SM2RAIN Algorithm for Rainfall Retrieval from Satellite Soil Moisture

Author

Ciabatta, Luca, Camici, Stefania, Massari, Christian, Filippucci, Paolo, Hahn, Sebastian, Wagner, Wolfgang, Brocca, Luca, Stoffel, Markus, Series Editor, Cramer, Wolfgang, Advisory Editor, Luterbacher, Urs, Advisory Editor, Toth, F., Advisory Editor, Levizzani, Vincenzo, editor, Kidd, Christopher, editor, Kirschbaum, Dalia B., editor, Kummerow, Christian D., editor, Nakamura, Kenji, editor, and Turk, F. Joseph, editor

Published
2020
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26. Global-Scale Evaluation of 22 Precipitation Datasets Using Gauge Observations and Hydrological Modeling

Author

Beck, Hylke E., Vergopolan, Noemi, Pan, Ming, Levizzani, Vincenzo, van Dijk, Albert I. J. M., Weedon, Graham P., Brocca, Luca, Pappenberger, Florian, Huffman, George J., Wood, Eric F., Stoffel, Markus, Series Editor, Cramer, Wolfgang, Advisory Editor, Luterbacher, Urs, Advisory Editor, Toth, F., Advisory Editor, Levizzani, Vincenzo, editor, Kidd, Christopher, editor, Kirschbaum, Dalia B., editor, Kummerow, Christian D., editor, Nakamura, Kenji, editor, and Turk, F. Joseph, editor

Published
2020
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31. Altimetry for the future: Building on 25 years of progress

Author

Abdalla, Saleh, Abdeh Kolahchi, Abdolnabi, Ablain, Michaël, Adusumilli, Susheel, Aich Bhowmick, Suchandra, Alou-Font, Eva, Amarouche, Laiba, Andersen, Ole Baltazar, Antich, Helena, Aouf, Lotfi, Arbic, Brian, Armitage, Thomas, Arnault, Sabine, Artana, Camila, Aulicino, Giuseppe, Ayoub, Nadia, Badulin, Sergei, Baker, Steven, Banks, Chris, Bao, Lifeng, Barbetta, Silvia, Barceló-Llull, Bàrbara, Barlier, François, Basu, Sujit, Bauer-Gottwein, Peter, Becker, Matthias, Beckley, Brian, Bellefond, Nicole, Belonenko, Tatyana, Benkiran, Mounir, Benkouider, Touati, Bennartz, Ralf, Benveniste, Jérôme, Bercher, Nicolas, Berge-Nguyen, Muriel, Bettencourt, Joao, Blarel, Fabien, Blazquez, Alejandro, Blumstein, Denis, Bonnefond, Pascal, Borde, Franck, Bouffard, Jérôme, Boy, François, Boy, Jean-Paul, Brachet, Cédric, Brasseur, Pierre, Braun, Alexander, Brocca, Luca, Brockley, David, Brodeau, Laurent, Brown, Shannon, Bruinsma, Sean, Bulczak, Anna, Buzzard, Sammie, Cahill, Madeleine, Calmant, Stéphane, Calzas, Michel, Camici, Stefania, Cancet, Mathilde, Capdeville, Hugues, Carabajal, Claudia Cristina, Carrere, Loren, Cazenave, Anny, Chassignet, Eric P., Chauhan, Prakash, Cherchali, Selma, Chereskin, Teresa, Cheymol, Cecile, Ciani, Daniele, Cipollini, Paolo, Cirillo, Francesca, Cosme, Emmanuel, Coss, Steve, Cotroneo, Yuri, Cotton, David, Couhert, Alexandre, Coutin-Faye, Sophie, Crétaux, Jean-François, Cyr, Frederic, d’Ovidio, Francesco, Darrozes, José, David, Cedric, Dayoub, Nadim, De Staerke, Danielle, Deng, Xiaoli, Desai, Shailen, Desjonqueres, Jean-Damien, Dettmering, Denise, Di Bella, Alessandro, Díaz-Barroso, Lara, Dibarboure, Gerald, Dieng, Habib Boubacar, Dinardo, Salvatore, Dobslaw, Henryk, Dodet, Guillaume, Doglioli, Andrea, Domeneghetti, Alessio, Donahue, David, Dong, Shenfu, Donlon, Craig, Dorandeu, Joël, Drezen, Christine, Drinkwater, Mark, Du Penhoat, Yves, Dushaw, Brian, Egido, Alejandro, Erofeeva, Svetlana, Escudier, Philippe, Esselborn, Saskia, Exertier, Pierre, Fablet, Ronan, Falco, Cédric, Farrell, Sinead Louise, Faugere, Yannice, Femenias, Pierre, Fenoglio, Luciana, Fernandes, Joana, Fernández, Juan Gabriel, Ferrage, Pascale, Ferrari, Ramiro, Fichen, Lionel, Filippucci, Paolo, Flampouris, Stylianos, Fleury, Sara, Fornari, Marco, Forsberg, Rene, Frappart, Frédéric, Frery, Marie-laure, Garcia, Pablo, Garcia-Mondejar, Albert, Gaudelli, Julia, Gaultier, Lucile, Getirana, Augusto, Gibert, Ferran, Gil, Artur, Gilbert, Lin, Gille, Sarah, Giulicchi, Luisella, Gómez-Enri, Jesús, Gómez-Navarro, Laura, Gommenginger, Christine, Gourdeau, Lionel, Griffin, David, Groh, Andreas, Guerin, Alexandre, Guerrero, Raul, Guinle, Thierry, Gupta, Praveen, Gutknecht, Benjamin D., Hamon, Mathieu, Han, Guoqi, Hauser, Danièle, Helm, Veit, Hendricks, Stefan, Hernandez, Fabrice, Hogg, Anna, Horwath, Martin, Idžanović, Martina, Janssen, Peter, Jeansou, Eric, Jia, Yongjun, Jia, Yuanyuan, Jiang, Liguang, Johannessen, Johnny A., Kamachi, Masafumi, Karimova, Svetlana, Kelly, Kathryn, Kim, Sung Yong, King, Robert, Kittel, Cecile M.M., Klein, Patrice, Klos, Anna, Knudsen, Per, Koenig, Rolf, Kostianoy, Andrey, Kouraev, Alexei, Kumar, Raj, Labroue, Sylvie, Lago, Loreley Selene, Lambin, Juliette, Lasson, Léa, Laurain, Olivier, Laxenaire, Rémi, Lázaro, Clara, Le Gac, Sophie, Le Sommer, Julien, Le Traon, Pierre-Yves, Lebedev, Sergey, Léger, Fabien, Legresy, Benoı̂t, Lemoine, Frank, Lenain, Luc, Leuliette, Eric, Levy, Marina, Lillibridge, John, Liu, Jianqiang, Llovel, William, Lyard, Florent, Macintosh, Claire, Makhoul Varona, Eduard, Manfredi, Cécile, Marin, Frédéric, Mason, Evan, Massari, Christian, Mavrocordatos, Constantin, Maximenko, Nikolai, McMillan, Malcolm, Medina, Thierry, Melet, Angelique, Meloni, Marco, Mertikas, Stelios, Metref, Sammy, Meyssignac, Benoit, Minster, Jean-François, Moreau, Thomas, Moreira, Daniel, Morel, Yves, Morrow, Rosemary, Moyard, John, Mulet, Sandrine, Naeije, Marc, Nerem, Robert Steven, Ngodock, Hans, Nielsen, Karina, Nilsen, Jan Even Øie, Niño, Fernando, Nogueira Loddo, Carolina, Noûs, Camille, Obligis, Estelle, Otosaka, Inès, Otten, Michiel, Oztunali Ozbahceci, Berguzar, P. Raj, Roshin, Paiva, Rodrigo, Paniagua, Guillermina, Paolo, Fernando, Paris, Adrien, Pascual, Ananda, Passaro, Marcello, Paul, Stephan, Pavelsky, Tamlin, Pearson, Christopher, Penduff, Thierry, Peng, Fukai, Perosanz, Felix, Picot, Nicolas, Piras, Fanny, Poggiali, Valerio, Poirier, Étienne, Ponce de León, Sonia, Prants, Sergey, Prigent, Catherine, Provost, Christine, Pujol, M-Isabelle, Qiu, Bo, Quilfen, Yves, Rami, Ali, Raney, R. Keith, Raynal, Matthias, Remy, Elisabeth, Rémy, Frédérique, Restano, Marco, Richardson, Annie, Richardson, Donald, Ricker, Robert, Ricko, Martina, Rinne, Eero, Rose, Stine Kildegaard, Rosmorduc, Vinca, Rudenko, Sergei, Ruiz, Simón, Ryan, Barbara J., Salaün, Corinne, Sanchez-Roman, Antonio, Sandberg Sørensen, Louise, Sandwell, David, Saraceno, Martin, Scagliola, Michele, Schaeffer, Philippe, Scharffenberg, Martin G., Scharroo, Remko, Schiller, Andreas, Schneider, Raphael, Schwatke, Christian, Scozzari, Andrea, Ser-giacomi, Enrico, Seyler, Frederique, Shah, Rashmi, Sharma, Rashmi, Shaw, Andrew, Shepherd, Andrew, Shriver, Jay, Shum, C.K., Simons, Wim, Simonsen, Sebatian B., Slater, Thomas, Smith, Walter, Soares, Saulo, Sokolovskiy, Mikhail, Soudarin, Laurent, Spatar, Ciprian, Speich, Sabrina, Srinivasan, Margaret, Srokosz, Meric, Stanev, Emil, Staneva, Joanna, Steunou, Nathalie, Stroeve, Julienne, Su, Bob, Sulistioadi, Yohanes Budi, Swain, Debadatta, Sylvestre-baron, Annick, Taburet, Nicolas, Tailleux, Rémi, Takayama, Katsumi, Tapley, Byron, Tarpanelli, Angelica, Tavernier, Gilles, Testut, Laurent, Thakur, Praveen K., Thibaut, Pierre, Thompson, LuAnne, Tintoré, Joaquín, Tison, Céline, Tourain, Cédric, Tournadre, Jean, Townsend, Bill, Tran, Ngan, Trilles, Sébastien, Tsamados, Michel, Tseng, Kuo-Hsin, Ubelmann, Clément, Uebbing, Bernd, Vergara, Oscar, Verron, Jacques, Vieira, Telmo, Vignudelli, Stefano, Vinogradova Shiffer, Nadya, Visser, Pieter, Vivier, Frederic, Volkov, Denis, von Schuckmann, Karina, Vuglinskii, Valerii, Vuilleumier, Pierrik, Walter, Blake, Wang, Jida, Wang, Chao, Watson, Christopher, Wilkin, John, Willis, Josh, Wilson, Hilary, Woodworth, Philip, Yang, Kehan, Yao, Fangfang, Zaharia, Raymond, Zakharova, Elena, Zaron, Edward D., Zhang, Yongsheng, Zhao, Zhongxiang, Zinchenko, Vadim, and Zlotnicki, Victor

Published
2021
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34. List of contributors

Author

Adirosi, Elisa, primary, Alberoni, Pier Paolo, additional, Anagnostou, Emmanouil N., additional, Anagnostou, Marios, additional, Anagnostou, Marios N., additional, Battaglia, Alessandro, additional, Beauchamp, James, additional, Biscaro, Thiago Souza, additional, Bochenek, Bogdan, additional, Borg, Erik, additional, Borrmann, Stephan, additional, Bringi, V.N., additional, Brocca, Luca, additional, Camplani, Andrea, additional, Casella, Daniele, additional, Cauteruccio, Arianna, additional, Cecchini, Micael Amore, additional, Cecil, Daniel, additional, Chen, Ying-Wen, additional, D’Adderio, Leo Pio, additional, Diehl, Karoline, additional, Dietrich, Peter, additional, Dietrich, Stefano, additional, Federico, Stefano, additional, Gastaldo, Thomas, additional, Gatlin, Patrick N., additional, Ikuta, Yasutaka, additional, Jurczyk, Anna, additional, Kalnay, Eugenia, additional, Kalogiros, John, additional, Kanemaru, Kaya, additional, Katsafados, Petros, additional, Katsanos, Dimitrios, additional, Kidd, Chris, additional, Klepp, Christian, additional, Kondo, Keiichi, additional, Kotsuki, Shunji, additional, Kucera, Paul A., additional, Lanza, Luca G., additional, Lien, Guo-Yuan, additional, Linkowska, Joanna, additional, Lombardo, Federico, additional, Maggioni, Viviana, additional, Manzato, Agostino, additional, Massari, Christian, additional, Matsui, Toshihisa, additional, Mattos, Enrique Vieira, additional, Mazzoglio, Paola, additional, Mentzafou, Angeliki, additional, Merino, Andrés, additional, Michaelides, Silas, additional, Mitra, Subir Kumar, additional, Miyoshi, Takemasa, additional, Morsy, Mona, additional, Mroz, Kamil, additional, Navarro, Andrés, additional, Nystuen, Jeffrey A., additional, Okamoto, Kozo, additional, Oliveira, Rômulo Augusto Jucá, additional, Otop, Irena, additional, Otsuka, Shigenori, additional, Ośródka, Katarzyna, additional, Paccagnella, Tiziana, additional, Panegrossi, Giulia, additional, Papadopoulos, Anastasios, additional, Pappa, Aikaterini, additional, Pasierb, Magdalena, additional, Poli, Virginia, additional, Porcù, Federico, additional, Rahman, Khalil Ur, additional, Retalis, Adrianos, additional, Ringerud, Sarah, additional, Sanò, Paolo, additional, Sapiano, Mathew Raymond Paul, additional, Satoh, Masaki, additional, Scholten, Thomas, additional, Shang, Songhao, additional, Sharifi, Ehsan, additional, Sherief, Youssef, additional, Spyrou, Christos, additional, Szakáll, Miklós, additional, Szturc, Jan, additional, Terasaki, Koji, additional, Theis, Alexander, additional, Thurai, Merhala, additional, Tokay, Ali, additional, Tomita, Hirofumi, additional, Torcasio, Rosa Claudia, additional, Tymvios, Filippos, additional, Varlas, George, additional, Vila, Daniel Alejandro, additional, Vulpiani, Gianfranco, additional, Wang, Nai-Yu, additional, Yano, Jun-Ichi, additional, and Yashiro, Hisashi, additional

Published
2022
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38. A roadmap for high-resolution satellite soil moisture applications – confronting product characteristics with user requirements

Author

Peng, Jian, Albergel, Clement, Balenzano, Anna, Brocca, Luca, Cartus, Oliver, Cosh, Michael H., Crow, Wade T., Dabrowska-Zielinska, Katarzyna, Dadson, Simon, Davidson, Malcolm W.J., de Rosnay, Patricia, Dorigo, Wouter, Gruber, Alexander, Hagemann, Stefan, Hirschi, Martin, Kerr, Yann H., Lovergine, Francesco, Mahecha, Miguel D., Marzahn, Philip, Mattia, Francesco, Musial, Jan Pawel, Preuschmann, Swantje, Reichle, Rolf H., Satalino, Giuseppe, Silgram, Martyn, van Bodegom, Peter M., Verhoest, Niko E.C., Wagner, Wolfgang, Walker, Jeffrey P., Wegmüller, Urs, and Loew, Alexander

Published
2021
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39. An inter-comparison of approaches and frameworks to quantify irrigation from satellite data

Author

Kragh, Søren Julsgaard, Dari, Jacopo, Modanesi, Sara, Massari, Christian, Brocca, Luca, Fensholt, Rasmus, Stisen, Simon, Koch, Julian, Kragh, Søren Julsgaard, Dari, Jacopo, Modanesi, Sara, Massari, Christian, Brocca, Luca, Fensholt, Rasmus, Stisen, Simon, and Koch, Julian

Abstract

This study provides the first inter-comparison of different state-of-the-art approaches and frameworks that share a commonality in their utilization of satellite remote-sensing data to quantify irrigation at a regional scale. The compared approaches vary in their reliance on either soil moisture or evapotranspiration data or their joint utilization of both. The two compared frameworks either extract irrigation information from residuals between satellite observations and rainfed hydrological models in a baseline framework or use soil water balance modeling in a soil-moisture-based inversion framework. The inter-comparison is conducted over the lower Ebro catchment in Spain where observed irrigation amounts are available for benchmarking. Our results showed that within the baseline framework, the joint approach using both soil moisture and evapotranspiration (ET) remote-sensing data only differed by +37mm from the irrigation benchmark (922mm) during the main irrigation season over 2 years and by +47 and -208mm for approaches relying solely on soil moisture and ET, respectively. A comparison of the different frameworks showed that the main advantage of the more complex baseline framework was the consistency between soil moisture and ET components within the hydrological model, which made it unlikely that either one ended up representing all irrigation water use. However, the simplicity of the soil-moisture-based inversion framework, coupled with its direct conversion of soil moisture changes into actual water volumes, effectively addresses the key challenges inherent in the baseline framework, which are associated with uncertainties related to an unknown remote-sensing observation depth and the static depth of the soil layers in a conceptual model. The performance of the baseline framework came closest to the irrigation benchmark and was able to account for the precipitation input, which resulted in more plausible temporal distributions of irrigation than what was

Published
2024

40. NDVI Prediction of Mediterranean Permanent Grasslands Using Soil Moisture Products.

Author

Milazzo, Filippo, Brocca, Luca, and Vanwalleghem, Tom

Subjects
*VEGETATION dynamics, *SOIL moisture, *RANDOM forest algorithms, *MEDITERRANEAN climate, *CROP yields
Abstract

Vegetation indices are widely used to assess vegetation dynamics. The Normalized Vegetation Index (NDVI) is the most widely used metric in agriculture, frequently as a proxy for different physiological and agronomical aspects, such as crop yield or biomass, crop density, or drought stress. Much effort has therefore been directed to NDVI forecasting, which is usually correlated with precipitation. However, in Mediterranean and arid climates, the relationship is more complex due to prolonged dry periods and sparse precipitation events. In this study, we forecast the NDVI 7 and 30 days ahead for Mediterranean permanent grasslands using a machine learning Random Forest (RF) model for the period from 2015 to 2022. The model compares two soil moisture products as predictors: simulated soil moisture values based on in situ soil moisture sensor observations and remote sensing-derived observations of Soil Water Index (SWI) values. We further analyzed the anomalies of the predicted NDVI using the z-score. The results show that both products can be used as reliable predictors for permanent grasslands in Mediterranean areas. Predictions at 7 days are more accurate and better forecast the negative effect of drought on vegetation dynamics than those at 30 days. This study shows the potential of using a simple methodology and readily available data to predict the grassland growth dynamics in the Mediterranean area. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Soil moisture products consistency for operational drought monitoring in Europe.

Author

Gaona, Jaime, Bavera, Davide, Fioravanti, Guido, Hahn, Sebastian, Stradiotti, Pietro, Filippucci, Paolo, Camici, Stefania, Ciabatta, Luca, Mossaffa, Hamidreza, Puca, Silvia, Roberto, Nicoletta, and Brocca, Luca

Abstract

The roadmap to enable operational soil moisture (SM) monitoring for meteorologic and hydrological early warning is challenged by the uncertainty within the available remote sensing and modelling products. This study addressed two relevant uncertainties: the residual trends in the series and the spatial consistency. While the latter has been often revisited to validate remote sensing and modelling products against in-situ data, the former is often disregarded in studies addressing SM changes. This study evaluated three SM products: (1) the Satellite Application Facility on Support to Operational Hydrology and Water Management (H SAF) active Advanced SCATterometer (ASCAT)-derived dataset, (2) the passive subset of the European Space Agency (ESA) - Climate Change Initiative (CCIp), and (3) the modelled dataset from the European Drought Observatory (EDO). The analysis was carried out over Europe in the period 2007–2022 at 10-day temporal scales. We obtained that even these popular datasets are subject to patches of spatial inconsistency and residual trends when compared to the in-situ data from the International Soil Moisture Network (ISMN). In view of the great complementarity shown by the active and passive remote sensing and the modelled SM estimates, two merged products are proposed and tested against in-situ data. Results indicate that combining H SAF ASCAT, CCIp and EDO equals or surpasses the spatial and temporal consistency of the individual SM products alone, even when only the near-real-time products of H SAF ASCAT and EDO are combined. Thus, merging remote sensing and modelled SM products is advantageous for enhanced spatial and temporal operational monitoring of SM at the European scale. [ABSTRACT FROM AUTHOR]

Published
2024
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43. Towards a Digital Twin for the Alps to simulate water-related processes and geohazards for climate change adaptation strategies.

Author

Malet, Jean-Philippe, primary, Lamare, Maxime, additional, Guardamino, Lucia, additional, Viehweger, Jonas, additional, Camici, Stefania, additional, Brocca, Luca, additional, Barbetta, Silvia, additional, Bonaccorsi, Bianca, additional, Modanesi, Sara, additional, Tarpanelli, Angelica, additional, Dall’Amico, Matteo, additional, Di Paolo, Federico, additional, Franceschetti, Nicolo, additional, Michoud, Clément, additional, Oppikoffer, Thierry, additional, Michéa, David, additional, Provost, Floriane, additional, Déprez, Aline, additional, Foumelis, Michaelis, additional, and Bally, Philippe, additional

Published
2024
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45. A Digital Twin of the terrestrial water cycle: a glimpse into the future through high-resolution Earth observations

Author

Brocca, Luca, primary, Barbetta, Silvia, additional, Camici, Stefania, additional, Ciabatta, Luca, additional, Dari, Jacopo, additional, Filippucci, Paolo, additional, Massari, Christian, additional, Modanesi, Sara, additional, Tarpanelli, Angelica, additional, Bonaccorsi, Bianca, additional, Mosaffa, Hamidreza, additional, Wagner, Wolfgang, additional, Vreugdenhil, Mariette, additional, Quast, Raphael, additional, Alfieri, Lorenzo, additional, Gabellani, Simone, additional, Avanzi, Francesco, additional, Rains, Dominik, additional, Miralles, Diego G., additional, Mantovani, Simone, additional, Briese, Christian, additional, Domeneghetti, Alessio, additional, Jacob, Alexander, additional, Castelli, Mariapina, additional, Camps-Valls, Gustau, additional, Volden, Espen, additional, and Fernandez, Diego, additional

Published
2024
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49. Exploring the Actual Spatial Resolution of 1 Km Satellite Soil Moisture Products

Author

Brocca, Luca, primary, Gaona, Jaime, additional, Fioravanti, Guido, additional, Ciabatta, Luca, additional, Esposito, Giuseppe, additional, Roberto, Nicoletta, additional, Dari, Jacopo, additional, Vreugdenhil, Mariette, additional, Bavera, Davide, additional, Puca, Silvia, additional, Filippucci, Paolo, additional, Wagner, Wolfgang, additional, and Mosaffa, Hamidreza, additional

Published
2024
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