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Irrigation in the Earth system

Urheber*innen

McDermid,  Sonali
External Organizations;

Nocco,  Mallika
External Organizations;

Lawston-Parker,  Patricia
External Organizations;

Keune,  Jessica
External Organizations;

Pokhrel,  Yadu
External Organizations;

Jain,  Meha
External Organizations;

/persons/resource/jonasjae

Jägermeyr,  Jonas
Potsdam Institute for Climate Impact Research;

Brocca,  Luca
External Organizations;

Massari,  Christian
External Organizations;

Jones,  Andrew D.
External Organizations;

Vahmani,  Pouya
External Organizations;

Thiery,  Wim
External Organizations;

Yao,  Yi
External Organizations;

Bell,  Andrew
External Organizations;

Chen,  Liang
External Organizations;

Dorigo,  Wouter
External Organizations;

Hanasaki,  Naota
External Organizations;

Jasechko,  Scott
External Organizations;

Lo,  Min-Hui
External Organizations;

Mahmood,  Rezaul
External Organizations;

Mishra,  Vimal
External Organizations;

Mueller,  Nathaniel D.
External Organizations;

Niyogi,  Dev
External Organizations;

Rabin,  Sam S.
External Organizations;

Sloat,  Lindsey
External Organizations;

Wada,  Yoshihide
External Organizations;

Zappa,  Luca
External Organizations;

Chen,  Fei
External Organizations;

Cook,  Benjamin I.
External Organizations;

Kim,  Hyungjun
External Organizations;

Lombardozzi,  Danica
External Organizations;

Polcher,  Jan
External Organizations;

Ryu,  Dongryeol
External Organizations;

Santanello,  Joe
External Organizations;

Satoh,  Yusuke
External Organizations;

Seneviratne,  Sonia
External Organizations;

Singh,  Deepti
External Organizations;

Yokohata,  Tokuta
External Organizations;

Externe Ressourcen
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Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte in PIKpublic verfügbar
Ergänzendes Material (frei zugänglich)
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Zitation

McDermid, S., Nocco, M., Lawston-Parker, P., Keune, J., Pokhrel, Y., Jain, M., Jägermeyr, J., Brocca, L., Massari, C., Jones, A. D., Vahmani, P., Thiery, W., Yao, Y., Bell, A., Chen, L., Dorigo, W., Hanasaki, N., Jasechko, S., Lo, M.-H., Mahmood, R., Mishra, V., Mueller, N. D., Niyogi, D., Rabin, S. S., Sloat, L., Wada, Y., Zappa, L., Chen, F., Cook, B. I., Kim, H., Lombardozzi, D., Polcher, J., Ryu, D., Santanello, J., Satoh, Y., Seneviratne, S., Singh, D., Yokohata, T. (2023): Irrigation in the Earth system. - Nature Reviews Earth & Environment, 4, 435-453.
https://doi.org/10.1038/s43017-023-00438-5


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_28547
Zusammenfassung
Irrigation accounts for ~70% of global freshwater withdrawals and ~90% of consumptive water use, driving myriad Earth system impacts. In this Review, we summarize how irrigation currently impacts key components of the Earth system. Estimates suggest that more than 3.6 million km2 of currently irrigated land, with hot spots in the intensively cultivated US High Plains, California Central Valley, Indo-Gangetic Basin and northern China. Process-based models estimate that ~2,700 ± 540 km3 irrigation water is withdrawn globally each year, broadly consistent with country-reported values despite these estimates embedding substantial uncertainties. Expansive irrigation has modified surface energy balance and biogeochemical cycling. A shift from sensible to latent heat fluxes, and resulting land–atmosphere feedbacks, generally reduce regional growing season surface temperatures by ~1–3 °C. Irrigation can ameliorate temperature extremes in some regions, but conversely exacerbates moist heat stress. Modelled precipitation responses are more varied, with some intensive cropping regions exhibiting suppressed local precipitation but enhanced precipitation downstream owing to atmospheric circulation interactions. Additionally, irrigation could enhance cropland carbon uptake; however, it can also contribute to elevated methane fluxes in rice systems and mobilize nitrogen loading to groundwater. Cross-disciplinary, integrative research efforts can help advance understanding of these irrigation–Earth system interactions, and identify and reduce uncertainties, biases and limitations.