A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Irrigation enhances local warming with greater nocturnal warming effects than daytime cooling effects
To meet the growing demand for food, land is being managed to be more productive using agricultural intensification practices, such as the use of irrigation. Understanding the specific environmental impacts of irrigation is a critical part of using it as a sustainable way to provide food security. However, our knowledge of irrigation effects on climate is still limited to daytime effects. This is a critical issue to define the effects of irrigation on warming related to greenhouse gases (GHGs). This study shows that irrigation led to an increasing temperature (0.002 °C year ^−1 ) by enhancing nighttime warming (0.009 °C year ^−1 ) more than daytime cooling (−0.007 °C year ^−1 ) during the dry season from 1961–2004 over the North China Plain (NCP), which is one of largest irrigated areas in the world. By implementing irrigation processes in regional climate model simulations, the consistent warming effect of irrigation on nighttime temperatures over the NCP was shown to match observations. The intensive nocturnal warming is attributed to energy storage in the wetter soil during the daytime, which contributed to the nighttime surface warming. Our results suggest that irrigation could locally amplify the warming related to GHGs, and this effect should be taken into account in future climate change projections.
Irrigation enhances local warming with greater nocturnal warming effects than daytime cooling effects
To meet the growing demand for food, land is being managed to be more productive using agricultural intensification practices, such as the use of irrigation. Understanding the specific environmental impacts of irrigation is a critical part of using it as a sustainable way to provide food security. However, our knowledge of irrigation effects on climate is still limited to daytime effects. This is a critical issue to define the effects of irrigation on warming related to greenhouse gases (GHGs). This study shows that irrigation led to an increasing temperature (0.002 °C year ^−1 ) by enhancing nighttime warming (0.009 °C year ^−1 ) more than daytime cooling (−0.007 °C year ^−1 ) during the dry season from 1961–2004 over the North China Plain (NCP), which is one of largest irrigated areas in the world. By implementing irrigation processes in regional climate model simulations, the consistent warming effect of irrigation on nighttime temperatures over the NCP was shown to match observations. The intensive nocturnal warming is attributed to energy storage in the wetter soil during the daytime, which contributed to the nighttime surface warming. Our results suggest that irrigation could locally amplify the warming related to GHGs, and this effect should be taken into account in future climate change projections.
Irrigation enhances local warming with greater nocturnal warming effects than daytime cooling effects
Xing Chen (author) / Su-Jong Jeong (author)
2018
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Daytime warming during early grain filling offsets the CO2 fertilization effect in rice
| DOAJ | 2022
Global warming uncertainties, effects, and policy options
| British Library Online Contents | 1998
Global-Warming Effects on New York Streamflows
| British Library Online Contents | 1995
Global-Warming Effects on New York Streamflows
| Online Contents | 1995