Articles


  • WATCH Paper "Feedbacks on Convection from an African Wetland" in press with Geophysical Research Letters The Niger Inland Delta in Mali floods every year in response to rain falling hundreds of kilometers upstream. This study examines the remote hydrological feedback between rainfall, fluvial inundation, and new convective storms. A satellite thermal infra-red dataset spanning 24 years is used to quantify both temporal variability in wetland extent, and the response of cloud cover to the wetland during August and September. The daytime initiation of convective storms is found to double during periods of inundation, consistent with a hypothesised “wetland breeze” effect. A signal of enhanced cloud cover propagates hundreds of kilometers westwards, linked to increased numbers of long-lived Mesoscale Convective Systems emanating from the wetland region. This effect raises the possibility that changes in upstream water use could have a climatic impact over a wide area.
    Geophysical Research Letters , February 01, 2010

  • Impact of irrigation on the South Asian summer monsoon The Indian subcontinent is one of the most intensely irrigated regions of the world and state of the art climate models do not account for the representation of irrigation. Sensitivity studies with the regional climate model REMO show distinct feedbacks between the simulation of the monsoon circulation with and without irrigation processes. We find that the temperature and mean sea level pressure, where the standard REMO version without irrigation shows a significant bias over the areas of Indus basin, is highly sensitive to the water used for irrigation. In our sensitivity test we find that removal of this bias has caused less differential heating between land and sea masses. This in turns reduces the westerlies entering into land from Arabian Sea, hence creating conditions favorable for currents from Bay of Bengal to intrude deep into western India and Pakistan that have been unrealistically suppressed before. We conclude that the representation of irrigated water is unavoidable for realistic simulation of south Asian summer monsoon and its response under global warming.
    Geophysical Resource Letters 36 / Saeed, F., S. Hagemann, and D. Jacob (2009), Max Planck Institute for Meteorology, Hamburg, Germany, October 30, 2009

  • Space-time modeling of catchment scale drought characteristics The paper Space-time modeling of catchment scale drought characteristics (Tallaksen, L.M., Hisdal, H. & van Lanen, H.A.J.) was recently published in the Journal of Hydrology as a contribution to the WATCH project (WB4; Task 4.1.2a).
    Journal of Hydrology / Authors: Tallaksen, L.M., Hisdal, H. & van Lanen, H.A.J. (2009), September 15, 2009

  • Causes of change in 20th century global river discharge WATCH member Dieter Gerten (The Potsdam Institute for Climate Impact Research - PIK) has contributed to the article "Causes of change in 20th century global river discharge".
    Gerten, D., Rost, S., von Bloh, W., Lucht, W (Potsdam Institute for Climate Impact Research, Potsdam, Germany), April 24, 2009

  • Impact of summer droughts on the water quality Climate change is expected to increase the frequency and intensity of low river flows, affecting both water quantity and water quality. Although climate change impacts on water quantity are widely recognised, the impacts on water quality are less known. The aim of this paper is to assess the effects of droughts on the water quality of the river Meuse in western Europe, based on analysis of existing water quality data. Time series of water quality were investigated at two monitoring stations during two severe drought periods, occurring in the years 1976 and 2003. The results indicate a general deterioration of the water quality of the Meuse river during droughts, with respect to water temperature, eutrophication, major elements, and some heavy metals and metalloids. This decline in water quality is primarily caused by favourable conditions for the development of algae blooms (high water temperatures, long residence times, high nutrient concentrations) and a reduction of the dilution capacity of point source effluents.
    Journal of Hydrology (2008) 353, 1– 17, authors: M.T.H. van Vliet (Department of Physical Geography, Utrecht University), J.J.G. Zwolsman (Kiwa), May 20, 2008

  • Improved scale processes reflected in projected hydrological changes over large European catchments Hagemann, S., H. Göttel, D. Jacob, P. Lorenz and E. Roeckner, 2008., Improved regional scale processes reflected in projected hydrological changes over large European catchments Climate Dynamics, doi: 10.1007/s00382-008-0403-9
    WATCH, January 15, 2008

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Papers and Reports in the context of WATCH: total overview until January 2009

  • Bates B., Kundzewicz Z.W., Wu S. & Palutikof J. (Eds.) (2008) Climate Change and Water. Technical Paper of the Intergovernmental Panel on Climate Change, IPCC Secretariat. Geneva, 210 pp
  • Berg, P., Haerter, J. O., Piani, C., Thejll, P., Hagemann, S. & Christensen, J. S. Moduation of daily precipitation by surface temperature: applicability of the Clausius-Clapeyron equation. Theor. and Appl. Clim. (submitted, 2009).
  • Berg, P. and Christensen, J.H., 2008. Poor man’s re-analysis over Europe. WATCH Technical Report No. 2.
  • Clark, D.B. and Gedney, N., 2008. Representing the effects of subgrid variability of soil moisture on runoff generation in a land surface model. J. Geophys. Res. 113, D10111, doi:10.1029/2007JD008940.
  • Colleuille, H., Beldring, S., Mengistu, Z., Haugen, L.E., Øverlie, T., Andersen, J & Wong, W.K. (2008) Monitoring system for groundwater and soil water based on simulations and realtime observations: the Norwegian experience. In: Sveinsson, Ó.G.B., Gardarsson, S.M. & GunnlaugsdQóttir, S. (Eds.) Northern hydrology and its global role. NHP Report no. 50, Vol. 2, 329-339.
  • Colleuille, H., Holmqvist, E., Beldring, S. & Haugen, L.E. (2008) Betydningen for grunnvannsog markvannsforhold for tilsig og kraftsituasjonen (the importance of groundwater and soil moisture for discharge and hydropower; in Norwegian, summary in English), NVE Report 12 2008.
  • Decharme, B., H. Douville, C. Prigent, F. Papa, and F. Aires, 2008. A new river flooding scheme for global climate applications: Off-line evaluation over South America, J. Geophys. Res., 113, D11110, doi:10.1029/2007JD009376.
  • Fendeková, M. & Petrovic, P. (2008): Precipitation data homogeneity asssessment for hydrological drought modelling in the Nitra basin. Meteorological Journal, 11: 147-151. ISSN 1335-339X.
  • Frappart, F., F. Papa, F., Famiglietti, J.S., Prigent, C., Rossow, W.B., Seyler, F., 2008. Interannual variations of river water storage from a multiple satellite approach: a case study for the Rio Negro River Basin, J. Geophys. Res., 113, D21104, doi:10.1029/2007JD009438.
  • Gedney, N., 2009. Methodology for evaluating the uncertainty of means and extremes from climate models. WATCH Technical Report No. 14.
  • Gerten, D., Rost, S., von Bloh, W., Lucht, W., 2008. Causes of change in 20th century global river discharge. Geophysical Research Letters 35, L20405, doi:10.1029/2008GL035258.
  • Gerten, D., I. Haddeland, S. Hagemann, F, Ludwig and D. Wiberg, 2008: Definition of socioeconomic scenarios for land surface hydrology simulations of the 21st century, WATCH Technical Rep. 5.
  • Hagemann, S., P. Berg, J.H. Christensen and J. Haerter, 2008: Analysis of existing climate model results over Europe, WATCH Technical Rep. 7.
  • Hagemann, S., H. Göttel, D. Jacob, P. Lorenz and E. Roeckner, 2008: Improved regional scale processes reflected in projected hydrological changes over large European catchments. Climate Dynamics, doi: 10.1007/s00382-008-0403-9.
  • Kašpárek, L. & Novický, O. (2008) Approaches for drought analysis and their application. In: Proceedings Conference on Modelling Floods and Droughts - Uncertainty estimates for Water Resources Management, Prague, March 2008.
  • Kundzewicz Z. W. (2008) Hydrological extremes in the changing world. Folia Geographica (Series Geographica-Physica) XXXIX, 37-52.
  • Kundzewicz Z.W. (2008) Flood risk and vulnerability in the changing climate. Ann. Warsaw Univ. of Life Sci. – SGGW. Land Reclam., 39: 21-31.
  • Kundzewicz Z.W. (2008) Konsekwencje globalnych zmian klimatu. Nauka, 1: 103-118 (in Polish).
  • Lanen, H.A.J. van & Tallaksen, L.M. (2008) Drought in Europe. In: Lambert, M., Daniell, T. & Leonard, M. (Eds.). Proceedings Water Down Under 2008, Adelaide, Australia, 14-17 April 2008, pp. 98-108.
  • Lanen, H.A.J.van & Fendeková, M. (2008) Low Flow and Drought Research in Europe: Achievements and Future. Conclusions and Recommendations. UNESCO EUROFRIEND International Workshop on Low Flows and Drought, Bratislava, 10-12 November 2008.
  • Lanen, H.A.J. van, Tallaksen, L.M., Candel, M., Carrera, J., Crooks, S., Engeland, K., Fendeková, M., Haddeland, I., Hisdal, H., Horacek, S., Jódar Bermúdez, J., van Loon, A.F., Machlica, A., Navarro, V., Novický, O. & Prudhomme, C. (2008) Database with hydrometeorological variables for selected river basins: Metadata Catalogue. WATCH Technical Report No. 4, 86 pp. 
  • Lanen, H.A.J. van, Tallaksen, L.M., Piani, C. & Pieri, P. (2008) International Summer School on Hydrological Drought and Global Change, Trieste, Italy, 22-27 June 2008. WATCH Technical Report No. 8, 45 pp.
  • Lanen, H.A.J. van, Kundzewicz, Z. W., Tallaksen, L.M., Hisdal, H., Fendeková, M. & Prudhomme, C. (2009) Indices for different types of droughts and floods at different scales. WATCH Technical Report No. 11, 17 pp.
  • Machlica, A. & Stojkovova M. (2008). Groundwater drought in different geological conditions. Proceedings 24th Conference of the Danubian Countries on the hydrological forecasting and hydrological bases of the water management, Bled, Slovenia, 2-4 June 2008, pp 1-10. CD: ISBN 978-961-91090-2-1; published in IOP Conf. Series: Earth and Environmental Science 4 (2008) 012010, doi: 10.1088/1755-1307/4/1/012010. Full text accessible at: http://www.iop.org/EJ/toc/1755-1315/4/1.
  • Milly P.C.D., Betancourt J., Falkenmark M., Hirsch R.M., Kundzewicz Z.W., Lettenmaier D.P. & Stouffer R.J. (2008) Stationarity is dead: whither water management? Science, 319: 573-574.
  • Papa, F., A. Guntner, F. Frappart, C. Prigent, and W. B. Rossow (2008), Variations of surface water extent and water storage in large river basins: A comparison of different global data sources, Geophys. Res. Lett., 35, L11401, doi:10.1029/2008GL033857.
  • Papa, F., C. Prigent, and W. B. Rossow, Monitoring flood and discharge variations in the large Siberian Rivers from a multi-satellite technique (2008), Surv. Geophys., doi:10.1007/s10712-008-9036-0.
  • Piani, P., J.O. Haerter and E. Coppola, 2009: Statistical bias correction for daily precipitation in regional climate models over Europe, Theoretical and Applied Climatology, accepted.
  • Piani, C., J.O. Haerter, S. Hagemann, M. Allen, S. Rosier, 2008: Practical methodologies to correct biases in climate model output, and to quantify and handle resulting uncertainties in estimates of future components of the global water cycle, WATCH Technical Rep. 6.
  • Piani, C., Haerter, J. O. & Coppola, E. Statistical bias correction for daily precipitation in regional climate models over Europe. Theor. and Appl. Clim. (submitted, 2009).
  • Radziejewski, M. & Kundzewicz, Z.W. (2009) Intercomparison of methods for trend detection in hydrological extremes derived from gridded data. WATCH Technical Report No. 13, 16 pp.
  • Rauscher, S.A., Coppola, E., Piani, C. & Giorgi, F. Resolution Effect on Regional Climate Model Simulation of Precipitation over Europe: Part I: Seasonal (to be submitted, 2009).
  • Rost, S., Gerten, D., Bondeau, A., Lucht, W., Rohwer, J., Schaphoff, S., 2008a. Agricultural green and blue water consumption and its influence on the global water system. Water Resources Research 44, W09405,  doi:10.1029/2007WR006331.
  • Rost, S., Gerten, D., Heyder, U., 2008b. Human alterations of the terrestrial water cycle through land management. Advances in Geosciences 18, 43-50.
  • Ruti, R.T., Piani, C., Dell'Aquila, A., Raucher, S. & Aina, T. Grand Ensemble Surface Extremes in current and future climate: the Euro-Mediterranean case (to be submitted, 2009).
  • Rysava, Z., Fendekova, M., Pekarova, P. (2008) Rezim hladiny podzemnej vody v casti Zvolenskej kotliny medzi Banskou Bystricou a Zvolenom [Groundwater level regime in the part of Zvolen basin between Banska Bystrica and Zvolen]. Podzemna voda, XIV 2/2008: 159-171, Slovak Association of Hydrogeologists, Bratislava, ISSN 1335-1052.
  • Sobrino, J.A., Julien, Y., Hidalgo, V., Jimenez, J.C., Soria, G., Mattar, C., Franch, B., Oltra, J., and Cuenca, J., 2008. Estimation of land surface temperature using AVHRR sensors on the NOAA satellite. WATCH Technical Report No. 9.
  • Stahl, K., Hisdal, H., Tallaksen, L.M., van Lanen, H.A.J., Hannaford, J. & Sauquet, E., 2008. Trends in low flows and streamflow droughts across Europe. UNESCO Report, Paris, 39pp.
  • Stojkovova, M., Machlica, A., Fendekova, M. (2008) Hodnotenie vyskytu hydrologickeho sucha a jeho vplyvu na zlozky vodnej bilancie v povodi hornej Nitry (Assessment of hydrological drought and its influence on elements of water balance in the Upper Nitra catchment). Proc. Hydrologie maleho povodi 2008 (Hydrology of a small catchment 2008), Prague, Czech Republic, 23-24 May 2008, pp. 269-276.
  • Tallaksen, L.M., Hisdal, H. & van Lanen, H.A.J. van. Space-time modelling of catchment scale drought characteristics (submitted to J. of Hydrol., October 2008).

Planned publications

  • Julien, Y., Sobrino, J. A., Mattar, C., Ruescas, A. B., Jiménez-Muñoz, J.-C., Sòria, G., Hidalgo, V., Atitar, M., Franch, B. & Cuenca, J. (accepted). Temporal analysis of NDVI and LST parameters to detect changes in the Iberian land cover between 1981 and 2001, Int. J. Rem. Sens.
  • Julien, Y. & Sobrino, J. A. (accepted). Multitemporal monitoring of global vegetation through the application of the Yearly Land Cover Dynamics (YLCD) method to the Pathfinder AVHRR Land database, Int. J. Remote Sen.
  • Julien, Y. & Sobrino, J. A. (submitted). Residual cloud cover influence on NDVI parameters retrieved from GIMMS NDVI data, Remote Sen. Env.
  • Sobrino, J. A. & Julien, Y. (accepted). Global trends in NDVI derived parameters obtained from GIMMS data, Int. J. Remote Sen.
  • Sobrino, J. A., Julien, Y., Hidalgo, V. & Franch, B. (submitted). Application of the Yearly Land Cover Dynamics (YLCD) method to high resolution images, Remote Sen. 

 

WATCH
Monday 15 June 2009