Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006
The influences of agricultural irrigation on trends in surface air temperature from 1959 to 2006 over Xinjiang, Northwest China are evaluated using data from 90 meteorological stations. The 90 stations are located in landscapes with markedly different cultivated land uses. The increasing trends in d...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2013-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/8/2/024039 |
| _version_ | 1797748435049250816 |
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| author | Songjun Han Zhiyong Yang |
| author_facet | Songjun Han Zhiyong Yang |
| author_sort | Songjun Han |
| collection | DOAJ |
| description | The influences of agricultural irrigation on trends in surface air temperature from 1959 to 2006 over Xinjiang, Northwest China are evaluated using data from 90 meteorological stations. The 90 stations are located in landscapes with markedly different cultivated land uses. The increasing trends in daily average temperature ( T _a ), maximum temperature ( T _max ), and minimum temperature ( T _min ) for May–September (the main growing season) are negatively correlated with cultivated land proportions within 4 km of the meteorological stations, as indicated by year 2000 land use data. The correlations between the trends in T _max and cultivated land proportions are the most significant. The trends in T _a , T _max , and T _min for May–September are expected to decrease by −0.018, −0.014, and −0.016 ° C per decade, respectively, along with a 10% increase in cultivated land proportion. As irrigated cultivated land occupies over 90% of total cultivated land, the dependence of temperature trends on cultivated area is attributed to irrigation. The cooling effects on stations with cultivated land proportion larger than 50% are compared to temperature trends in a reference group with cultivated land proportion smaller than 10%. The irrigation expansion from 1959 to 2006 over Xinjiang is found to be associated with cooling of May–September T _a , T _max , and T _min by around −0.15 ° C to −0.10 ° C/decade in the station group with extensive irrigation. Short periods of rapid irrigation expansion co-occurred with the significant cooling of the May–September temperature. |
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| format | Article |
| id | doaj.art-889bf0317eaa4393acd498504461b973 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T16:05:41Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
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| series | Environmental Research Letters |
| spelling | doaj.art-889bf0317eaa4393acd498504461b9732023-08-09T14:23:26ZengIOP PublishingEnvironmental Research Letters1748-93262013-01-018202403910.1088/1748-9326/8/2/024039Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006Songjun Han0Zhiyong Yang1State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research , Beijing 100038, People’s Republic of China; National Center of Efficient Irrigation Engineering and Technology Research , Beijing 100048, People’s Republic of ChinaState Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research , Beijing 100038, People’s Republic of China; Water Resources Department, China Institute of Water Resources and Hydropower Research , Beijing 100038, People’s Republic of ChinaThe influences of agricultural irrigation on trends in surface air temperature from 1959 to 2006 over Xinjiang, Northwest China are evaluated using data from 90 meteorological stations. The 90 stations are located in landscapes with markedly different cultivated land uses. The increasing trends in daily average temperature ( T _a ), maximum temperature ( T _max ), and minimum temperature ( T _min ) for May–September (the main growing season) are negatively correlated with cultivated land proportions within 4 km of the meteorological stations, as indicated by year 2000 land use data. The correlations between the trends in T _max and cultivated land proportions are the most significant. The trends in T _a , T _max , and T _min for May–September are expected to decrease by −0.018, −0.014, and −0.016 ° C per decade, respectively, along with a 10% increase in cultivated land proportion. As irrigated cultivated land occupies over 90% of total cultivated land, the dependence of temperature trends on cultivated area is attributed to irrigation. The cooling effects on stations with cultivated land proportion larger than 50% are compared to temperature trends in a reference group with cultivated land proportion smaller than 10%. The irrigation expansion from 1959 to 2006 over Xinjiang is found to be associated with cooling of May–September T _a , T _max , and T _min by around −0.15 ° C to −0.10 ° C/decade in the station group with extensive irrigation. Short periods of rapid irrigation expansion co-occurred with the significant cooling of the May–September temperature.https://doi.org/10.1088/1748-9326/8/2/02403992.60.Ry92.70.Kb92.40.Xx92.70.Stclimate changesurface air temperature |
| spellingShingle | Songjun Han Zhiyong Yang Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006 Environmental Research Letters 92.60.Ry 92.70.Kb 92.40.Xx 92.70.St climate change surface air temperature |
| title | Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006 |
| title_full | Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006 |
| title_fullStr | Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006 |
| title_full_unstemmed | Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006 |
| title_short | Cooling effect of agricultural irrigation over Xinjiang, Northwest China from 1959 to 2006 |
| title_sort | cooling effect of agricultural irrigation over xinjiang northwest china from 1959 to 2006 |
| topic | 92.60.Ry 92.70.Kb 92.40.Xx 92.70.St climate change surface air temperature |
| url | https://doi.org/10.1088/1748-9326/8/2/024039 |
| work_keys_str_mv | AT songjunhan coolingeffectofagriculturalirrigationoverxinjiangnorthwestchinafrom1959to2006 AT zhiyongyang coolingeffectofagriculturalirrigationoverxinjiangnorthwestchinafrom1959to2006 |