Irrigation cooling effect: Regional climate forcing by land-use change
Regional detection of a greenhouse warming signal relies on extensive, long‐term measurements of temperature. The potentially confounding impact of land‐cover and land‐use change on trends in temperature records has mostly focused on the influence of urban heat islands. Here we use a regional climat...
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| Veröffentlicht in: | Geophysical research letters 2007-02, Vol.34 (3), p.n/a |
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| container_title | Geophysical research letters |
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| creator | Kueppers, Lara M. Snyder, Mark A. Sloan, Lisa C. |
| description | Regional detection of a greenhouse warming signal relies on extensive, long‐term measurements of temperature. The potentially confounding impact of land‐cover and land‐use change on trends in temperature records has mostly focused on the influence of urban heat islands. Here we use a regional climate model to show that a regional irrigation cooling effect (ICE) exists, opposite in sign to urban heat island effects. The magnitude of the ICE has strong seasonal variability, causing large dry‐season decreases in monthly mean and maximum temperatures, but little change in rainy‐season temperatures. Our model produced a negligible effect on monthly minimum temperature. In California, the modeled regional ICE is of similar magnitude, but opposite sign, to predictions for future regional warming from greenhouse gases. Given our results for California and the global importance of irrigated agriculture, past expansion of irrigated land has likely affected observations of surface temperature, potentially masking the full warming signal caused by greenhouse gas increases. |
| doi_str_mv | 10.1029/2006GL028679 |
| format | Article |
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Res. Lett</addtitle><description>Regional detection of a greenhouse warming signal relies on extensive, long‐term measurements of temperature. The potentially confounding impact of land‐cover and land‐use change on trends in temperature records has mostly focused on the influence of urban heat islands. Here we use a regional climate model to show that a regional irrigation cooling effect (ICE) exists, opposite in sign to urban heat island effects. The magnitude of the ICE has strong seasonal variability, causing large dry‐season decreases in monthly mean and maximum temperatures, but little change in rainy‐season temperatures. Our model produced a negligible effect on monthly minimum temperature. In California, the modeled regional ICE is of similar magnitude, but opposite sign, to predictions for future regional warming from greenhouse gases. Given our results for California and the global importance of irrigated agriculture, past expansion of irrigated land has likely affected observations of surface temperature, potentially masking the full warming signal caused by greenhouse gas increases.</description><subject>California</subject><subject>climate change</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>irrigation cooling effect</subject><subject>land-cover and land-use change</subject><subject>regional climate modeling</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNp9kLFOwzAQhi0EEqWw8QBZYCJwdhI7ZkMVTYsKSAUEYrFc5xICaVLsVNC3J1EQMDH5bH3_d74j5JDCKQUmzxgAT2bAYi7kFhlQGYZ-DCC2yQBAtjUTfJfsOfcKAAEEdEDGU2uLXDdFXXmmrsuiyj3MMjTNuTfHvH3WpWfKYqkb9LLamg5YbLxSV6m_duiZF13luE92Ml06PPg-h-RhfHk_mviz22Q6upj5Joyp9KXRcdA1ZiYVsRSSRoxF4QJ5lBkd8YhFkiGkkqY0QCFSvoDILJBlEJsUeDAkx713Zev3NbpGLQtnsGy_g_XaKQachsBZC570oLG1cxYztbLtEHajKKhuWervslr86NurndFlZnVlCvebiTkwLjot67mPosTNv06VzGeMcd7J_T5UuAY_f0LavikuAhGpx5tEPU2ur57v2osIvgAbIIV4</recordid><startdate>200702</startdate><enddate>200702</enddate><creator>Kueppers, Lara M.</creator><creator>Snyder, Mark A.</creator><creator>Sloan, Lisa C.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>7TV</scope><scope>7U6</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>200702</creationdate><title>Irrigation cooling effect: Regional climate forcing by land-use change</title><author>Kueppers, Lara M. ; Snyder, Mark A. ; Sloan, Lisa C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4819-9ca8330312cd78979152254be65fca5652592e0d91d13e77d6b05cbe2f08cd063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>California</topic><topic>climate change</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>irrigation cooling effect</topic><topic>land-cover and land-use change</topic><topic>regional climate modeling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kueppers, Lara M.</creatorcontrib><creatorcontrib>Snyder, Mark A.</creatorcontrib><creatorcontrib>Sloan, Lisa C.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Pollution Abstracts</collection><collection>Sustainability Science Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kueppers, Lara M.</au><au>Snyder, Mark A.</au><au>Sloan, Lisa C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Irrigation cooling effect: Regional climate forcing by land-use change</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. 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| ispartof | Geophysical research letters, 2007-02, Vol.34 (3), p.n/a |
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| language | eng |
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| subjects | California climate change Earth sciences Earth, ocean, space Exact sciences and technology irrigation cooling effect land-cover and land-use change regional climate modeling |
| title | Irrigation cooling effect: Regional climate forcing by land-use change |
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