Effect of irrigation on humid heat extremes

Krakauer, Nir Y; Cook, Benjamin I; Puma, Michael J

doi:10.1088/1748-9326/ab9ecf

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Effect of irrigation on humid heat extremes

2020
By Krakauer, Nir Y ; Cook, Benjamin I ; Puma, Michael J
Source: Environmental Research Letters, 15(9)

[PDF-2.01 MB]

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Journal Title:

Environmental Research Letters
Personal Author:

Krakauer, Nir Y ; Cook, Benjamin I ; Puma, Michael J

Krakauer, Nir Y ; Cook, Benjamin I ; Puma, Michael J Less -
NOAA Program & Office:

CESSRST (Cooperative Science Center for Earth System Sciences and Remote Sensing Technologies) ; OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

CESSRST (Cooperative Science Center for Earth System Sciences and Remote Sensing Technologies) ; OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

Most studies of irrigation as an anthropogenic climate forcing focus on its cooling effects. However, irrigation also increases humidity, and so may not ameliorate humid heat and its extremes. We analyzed global climate model results over hot locations and seasons at high temporal resolution to estimate the impact of irrigation on humid heat extremes, quantified as different percentiles of wet-bulb temperature (), under contemporary conditions. We found that although irrigation reduced temperature, the median and higher percentiles of on average did not decrease. Increases in percentile values and increases in frequency of dangerous of several days per year due to irrigation were found in some densely populated regions, including the central United States and the Middle East, while the Ganges basin saw reduced . Changes in were partly associated with the differential regional impacts of irrigation on moisture transport. These results underline the importance of considering impacts of climate forcings on humidity as well as temperature in evaluating associated effects on heat extremes.
Keywords:

[+]

Humidity Irrigation Climate Change Heat
Source:

Environmental Research Letters, 15(9)
DOI:

https://doi.org/10.1088/1748-9326/ab9ecf
Document Type:

Journal Article
Funding:

Grant no. NA16SEC4810008 ; Grant no. NA15OAR4310080

Grant no. NA16SEC4810008 ; Grant no. NA15OAR4310080 Less -
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CC BY
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Submitted
Main Document Checksum:

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urn:sha256:00fde4c5879b0382aee908ae6ca9f55a42481716acabc670e85678b21fafaef6
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https://repository.library.noaa.gov/view/noaa/31492/noaa_31492_DS1.pdf
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Effect of irrigation on humid heat extremes

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