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    Nutrition under natural resource constraints

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    Homogenization of the terrestrial water cycle

    These authors contributed equally: Delphis F. Levia, Irena F. Creed.

    Department of Geography and Spatial Sciences, University of Delaware, Newark, DE, USA
    Delphis F. Levia, Janice E. Hudson & Sean A. Hudson

    School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
    Irena F. Creed

    School of Geography, Earth and Environmental Science, University of Birmingham, Birmingham, UK
    David M. Hannah

    Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute, Tsukuba, Japan
    Kazuki Nanko & Shin’ichi Iida

    Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, USA
    Elizabeth W. Boyer

    Department of Geography and Environmental Studies, Thompson Rivers University, Kamloops, British Columbia, Canada
    Darryl E. Carlyle-Moses

    Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands
    Nick van de Giesen

    Office of the Chancellor, University of Michigan- Dearborn, Dearborn, MI, USA
    Domenico Grasso

    Picker Engineering Program, Smith College, Northampton, MA, USA
    Andrew J. Guswa

    Department of Earth System Science, Woods Institute for the Environment, and Precourt Institute for Energy, Stanford University, Stanford, CA, USA
    Robert B. Jackson

    Nicholas School of the Environment, Duke University, Durham, NC, USA
    Gabriel G. Katul

    Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
    Tomo’omi Kumagai

    Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Barcelona, Spain
    Pilar Llorens

    Disaster Research Center, University of Delaware, Newark, DE, USA
    Flavio Lopes Ribeiro

    School of Biological Sciences, University of Utah, Salt Lake City, UT, USA
    Diane E. Pataki

    Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, USA
    Catherine A. Peters

    Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, USA
    Daniel Sanchez Carretero

    Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR, USA
    John S. Selker

    Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
    Doerthe Tetzlaff

    European Regional Center for Ecohydrology, UNESCO and Department of Applied Ecology, University of Lodz, Lodz, Poland
    Maciej Zalewski

    UCD School of Civil Engineering, University College Dublin, Dublin, Ireland
    Michael Bruen More

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    Rethinking groundwater age

    This research was supported by a Global Water Futures grant to G.F. and J.C.M. and an NSERC Discovery Grant to G.F. J.C.M acknowledges funding received as a Fellow of the CIFAR Earth4D Subsurface Science and Exploration Program. M.O.C. acknowledges support under an Independent Research Fellowship from the UK Natural Environment Research Council (NERC; NE/P017819/1). This commentary benefitted from discussions with P. Döll, J. Famiglietti, G. Fogg, X. Huggins, A. Manning, K. Markovich and M. Rohde. More

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    Author Correction: Two decades of glacier mass loss along the Andes

    A few missing months (March to July 2013) in the Santa river record in Peru were infilled using the corresponding long-term monthly means. If necessary, missing months in the Chilean and Argentinean river records were infilled with a weighted average of monthly values from highly correlated stations within the same river basin (for details see Masiokas et al. 2019).”

    In Supplementary Table 3, there were errors in the data for the Baker basin; the gauging station used should have been Bajo Ñadis instead of Desagüe Lago Bertrand, which affected the values of the annual mean river runoff, sub-period runoff change and the glacier imbalance contribution. For the annual mean river runoff (m3 s−1), 649.2 and 568.7 should have been 922.8 and 975.9, respectively; for the sub-period runoff change (%), −12 should have been 6; and for the glacier imbalance contribution (%), 3 and 5 should have been 2 and 3, respectively. Related to this, in the sentence beginning “The two Patagonian basins…” in the final paragraph of the section “Influence of glacier mass loss on river runoff” in the main text of the Article, “3 to 5%” should have been “2 to 3%”. Furthermore, in Supplementary Table 3, “Condorecerro” should have read “Condorcerro”.

    The online versions of the Article have been amended and the Supplementary Information file replaced. More