Hydrometeorology and Hydroclimate Christophe Cudennec, A

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Hydrometeorology and Hydroclimate Christophe Cudennec, A Hydrometeorology and Hydroclimate Christophe Cudennec, A. Gelfan, L. L. Ren, A. Slimani To cite this version: Christophe Cudennec, A. Gelfan, L. L. Ren, A. Slimani. Hydrometeorology and Hydrocli- mate. Advances in Meteorology, Hindawi Publishing Corporation, 2016, Article ID 1487890, 4 p. 10.1155/2016/1487890. hal-01474576 HAL Id: hal-01474576 https://hal.archives-ouvertes.fr/hal-01474576 Submitted on 27 May 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License Hindawi Publishing Corporation Advances in Meteorology Volume 2016, Article ID 1487890, 4 pages http://dx.doi.org/10.1155/2016/1487890 Editorial Hydrometeorology and Hydroclimate Christophe Cudennec,1,2 Alexander Gelfan,3 Liliang Ren,4 and Mohamed Slimani5 1 Agrocampus Ouest, UMR 1069 SAS, Rennes, France 2INRA, UMR 1069 SAS, Rennes, France 3Water Problems Institute of Russian Academy of Sciences, Moscow, Russia 4Hohai University, Nanjing, China 5Institut National Agronomique, Tunis, Tunisia Correspondence should be addressed to Christophe Cudennec; [email protected] Received 24 February 2016; Accepted 2 March 2016 Copyright © 2016 Christophe Cudennec et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Meteorology isthemaindrivingforceofhydrology along water across the different compartments and the correspond- time, from the instantaneous states and processes until the ing geographies, with impacts on physical properties and monthly, seasonal, yearly, and sometimes multiyear sequen- corresponding potential resources and hazards. These include ces. Meteorology drives and impacts much of the hydro- but are not limited to interaction with greenhouse gases logical flows and storages, thus water balance terms as well concentration trends underlying climate change, cryospheric as hazards, across a geometric and functional interface. shrinkage, changes of the land-ocean interface, individual This interface develops within a certain thickness, yet thin and cumulative effects of anthropogenic infrastructures, regarding the planetary radius and critical for water and massivegroundwaterpumpingwhichlocallyreducesthe other dynamics. This heterogeneous Critical Zone ranges resilience to drought and globally increases the atmospheric from the bottom of groundwater reservoirs to the top of the and hydrological circulating water, and accompanying geode- tree canopy [1], including surface water liquid and frozen tic and subsidence adjustments [10–15]. These are all inter- and gaseous flows and storages. Complex space-time effects twined, as elementary socioecological crises are symptoms develop in this critical zone such as orographic and oceanic which now appear to be imbedded in the general macroscopic influences on moisture-precipitation dynamics, hydrogeo- accelerating transformations of the Anthropocene syndrome morphological structure-function relationships, upstream- [16–19]. Intertwining is also emerging across a general nest- downstream integration, subsystems connectivities, variabil- ing, eventually self-organizing, from global and hemispheric ity interdependences, and scaling issues [2–6]. In some dynamics (from the natural oceano-hydrometeorological geographic settings, this critical zone is further complexified ones to new globalization ones) to regional and local niches by extreme conditions of some of the properties, such as andsettingswhichcanbecalledAnthropoScenes. dryness or wetness, groundwater geometries and dynamics, cryospheric developments (snow, ice, and permafrost), soil In statistical terms, meteorology can be characterized by and land covers, water uses, and concentration of water- climate, and statistical hydrology can be jointly analyzed, driven chemicals. which distinguishes hydrometeorology and hydroclimate. The hydrometeorological interface is further subject to Changesinclimate,intermsofmagnitude,statisticaldis- complex feedback and feedforward effects, from local fluid tribution, spatial distribution, timing and (a-)synchronicity, mechanic and thermodynamic processes themselves to major and range of variables, can have impacts on hydrological interactions within the macroscopic oceanic, lacustrine, cry- processes and statistics, as well as on associated dynamics ospheric, deep ground, and biospheric and atmospheric such as erosion, pollution, snow and ice, ecohydrology, and interdependences [7–9]. Ongoing reorganizations of these water uses. These impacts are also often mixed with the ones interdependences actually change the general distribution of of geographic changes [4, 6, 8, 15, 20]. 2 Advances in Meteorology In such a complex setting, enhanced by nonlinearities, framework [28, 33, 34], and multiple Water Security retroactions, and coevolutions, identifying change from vari- challenges [26, 27]. ability and eventual nonstationarity is a major issue [20–23]. (vii) Developing interdisciplinary foresight methodologies Further, deciphering, fingerprinting, and attributing causes and feeding comprehensive prospective explorations and impacts are complex in the frame of the Anthropocene of the future hydrometeorological/climatic interface and thus ultimately of the Water Security issue and Sustain- in the wider perspective of the critical zone in the able Development Goals [8, 24–29]. Anthropocene and climate change trends [1, 18, 35– Thisspecialissueisaimedasanadditionalbridge over the 37]. interfacing boundaries and call for deeper cooperation from the hydrological community towards the meteorological The papers published in this special issue do all feed the one. Specific challenges can indeed be identified from the hydrometeorological/climatic bridge, from the whole or hydrological perspective, all the more thanks to the recently continental-scale changing water cycle (X. Feng and P. launched agenda setting Panta Rhei initiative on change in Houser and J. Yin et al.) and some emblematic water-driven hydrology and society of the IAHS—International Associ- AnthropoScenes(Y.T.Dileetal.,G.Lietal.,Y.Lietal.,and ation of Hydrological Sciences of the IUGG—International Y. Tang et al.) to some focused studies of physical processes Union of Geodesy and Geophysics of the ICSU [15, 20] and (T.A.McCorkleetal.andB.M.Shresthaetal.),whilecon- thanks to the actual conceptualization of the Anthropocene tributing to several of the specific challenges identified here from the strictly stratigraphic definition [30] to the wider above:changeassessment(G.Lietal.,Y.Lietal.,andJ. epistemic understanding of ongoing and future socioecolog- Yinetal.),nesting(J.Liuetal.),conjunctionofcausalities ical relationships [17–19]. (Y. Tang et al.), and effects of anthropogenic actions (Y. T. From this perspective, the following specific challenges Dile et al. and B. M. Shrestha et al.), as applied to a range of are of particular interest: hydrometeorological/climatic variables, geographic contexts, and space-time-frequency scales. Several papers submitted, (i) Using historical information, palaeorecords, and whilenotpublishedhereaccordingtoatimelyscheduledpeer forensics of severe events to elucidate past changes in review, were also framing in this rationale and do have the climate and hydrology, including changes in hydrom- potential to later contribute to the debate and progress. There eteorological/climatic extremes. is no doubt that scientific progress and innovation will be very activeinthecomingyearsinthefieldofhydrology[3,4,15,38, (ii) Deepening the processes understanding and physical 39], not only in its core but also over its numerous complex foundation of models, enlarging the frontiers of and changing interfaces, from sociohydrology [20, 36, 37] modeled systems to encompass the critical interfaces and the eventually self-organizing processes of the socioeco- andzone,andadaptingmodelstoassimilatenew logical Anthropocene [15, 18, 19] to the fragile critical zone, observation means and data sources. and the changing frontiers between the oceanic, ground, (iii) Assessing the dynamic behaviour of hydrometeoro- terrestrial flowing and stored cryospheric and atmospheric logical systems in their links and feedback with coevo- components of the hydrosphere, among which hydrometeo- luting natural/socioeconomic systems and exploring rologyandhydroclimateremainkeychallengesforscientific the attribution issue by inversing causal relationships. pluridisciplinarity and for putting new knowledge, methods, (iv) Analyzing changes in patterns of stable/instable and skills into practice through observation, assessment, dynamical states of hydrometeorological/climatic mitigation, and adaptation [39, 40]. systems, the contribution of these changes to self- organization of the systems, the emergence of nesting Acknowledgments subsystems and coherent scenes, and the nature of adaptation to changing environmental complexity. This is a contribution
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