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  Global Water Availability and Requirements for Future Food Production

Gerten, D., Heinke, J., Hoff, H., Biemans, H., Fader, M., & Waha, K. (2011). Global Water Availability and Requirements for Future Food Production. Journal of Hydrometeorology, 12(5), 885-899. doi:10.1175/2011JHM1328.1.

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 Urheber:
Gerten, D.1, Autor
Heinke, J.1, Autor
Hoff, H.1, Autor
Biemans, H.1, Autor
Fader, M.2, Autor           
Waha, K.1, Autor
Affiliations:
1external, ou_persistent22              
2IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society, ou_913547              

Inhalt

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Schlagwörter: HIGH-RESOLUTION; CLIMATE-CHANGE; FRESH-WATER; RESOURCES; AGRICULTURE; VEGETATION; SCENARIOS; NATIONS; BALANCE; TRADE
 Zusammenfassung: This study compares, spatially explicitly and at global scale, per capita water availability and water requirements for food production presently (1971-2000) and in the future given climate and population change (2070-99). A vegetation and hydrology model Lund-Potsdam-Jena managed Land (LPJmL) was used to calculate green and blue water availability per capita, water requirements to produce a balanced diet representing a benchmark for hunger alleviation [3000 kilocalories per capita per day (1 kilocalorie = 4184 joules), here assumed to consist of 80% vegetal food and 20% animal products], and a new water scarcity indicator that relates the two at country scale. A country was considered water-scarce if its water availability fell below the water requirement for the specified diet, which is presently the case especially in North and East Africa and in southwestern Asia. Under climate (derived from 17 general circulation models) and population change (A2 and B1 emissions and population scenarios), water availability per person will most probably diminish in many regions. At the same time the calorie-specific water requirements tend to decrease, due mainly to the positive effect of rising atmospheric CO(2) concentration on crop water productivity which, however, is very uncertain to be fully realized in most regions. As a net effect of climate, CO(2), and population change, water scarcity will become aggravated in many countries, and a number of additional countries are at risk of losing their present capacity to produce a balanced diet for their inhabitants.

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Sprache(n): eng - English
 Datum: 2011-10
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000296029000010
DOI: 10.1175/2011JHM1328.1
 Art des Abschluß: -

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Titel: Journal of Hydrometeorology
  Andere : J. Hydrometeorol.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Boston, MA : American Meteorological Society
Seiten: - Band / Heft: 12 (5) Artikelnummer: - Start- / Endseite: 885 - 899 Identifikator: ISSN: 1525-755X
CoNE: https://pure.mpg.de/cone/journals/resource/110985820565058